WO2016062984A1 - Implantable device for the treatment of metabolic disorders - Google Patents
Implantable device for the treatment of metabolic disorders Download PDFInfo
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- WO2016062984A1 WO2016062984A1 PCT/FR2015/052878 FR2015052878W WO2016062984A1 WO 2016062984 A1 WO2016062984 A1 WO 2016062984A1 FR 2015052878 W FR2015052878 W FR 2015052878W WO 2016062984 A1 WO2016062984 A1 WO 2016062984A1
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- Prior art keywords
- proximal end
- sheath
- radial
- armature
- degrees
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F5/00—Orthopaedic methods or devices for non-surgical treatment of bones or joints; Nursing devices ; Anti-rape devices
- A61F5/0003—Apparatus for the treatment of obesity; Anti-eating devices
- A61F5/0013—Implantable devices or invasive measures
- A61F5/0076—Implantable devices or invasive measures preventing normal digestion, e.g. Bariatric or gastric sleeves
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F5/00—Orthopaedic methods or devices for non-surgical treatment of bones or joints; Nursing devices ; Anti-rape devices
- A61F5/0003—Apparatus for the treatment of obesity; Anti-eating devices
- A61F5/0013—Implantable devices or invasive measures
Definitions
- the present invention relates to an implantable device for treating metabolic disorders.
- Obesity is a pathology affecting a growing number of people.
- Endoluminal sheaths are a method of treating obesity.
- sheaths are positioned in the small intestine of a patient, to limit the absorption of nutrients through the lining of the small intestine.
- these sheaths are anchored through the pyloric orifice or possibly into the biliary orifice of the small intestine of the patient.
- the stomach and the small intestine are animated with peristaltic and segmental movements allowing the displacement and the absorption of the ingested food.
- the endoluminal sheaths can be fixed by hooks planted in the duodenal wall, or by retaining means passing through the pylorus.
- This mode of attachment can be traumatic for the tissues. In addition, this mode of attachment increases the risk of perforation of the small intestine, infection and hemorrhage.
- the present invention aims to provide a device that can be implanted in a small intestine preserving the integrity of tissues and limits the absorption of nutrients by the small intestine.
- the invention relates to an implantable device in a small intestine, which comprises:
- an armature formed of metal wires in knitted, braided or woven mesh, radially expandable between a contracted insertion position having a diameter D1 and a deployed position in which the armature has a body having a diameter D2 greater than the diameter D1 intended for exert a bearing on the wall of the small intestine and, at a proximal end and a retaining head having a diameter D3 with a diameter greater than the diameter D2, intended to form a retaining ring on the wall of the intestine, - a sheath on the frame for limiting the absorption of nutrients through the wall of the small intestine, comprising a proximal end superimposed on the armature retaining head and a distal portion superimposed on the body of the frame,
- a connecting cord connecting the armature and the sheath, forming a single connection of the proximal end of the armature and of the proximal end of the sheath making it possible to retain the sheath on the armature and making it possible to radially contract the armature; frame to allow removal of the device.
- the armature keeps the device in a small intestine while preserving the integrity of the tissues.
- the sheath limits the absorption of nutrients through the lining of the small intestine.
- the device according to the invention functions by the combination of its two components.
- the armature keeps the device in a small intestine without being harmful to the tissue and keeps the light in the sheath, that is to say, keep the sheath open while the sheath allows to limit the absorption nutrients through the lining of the small intestine.
- the combination of the armature and the sheath allows the device to be positioned in the descending part of a small intestine downstream of the vater bulb. Such positioning allows to retain a maximum of biological functions of the small intestine, which allows a better tolerance of the device by the body of the patient.
- the retaining head has, at its free end, a series of bottom meshes interposed with a series of end stitches in which the binding cord is engaged, a traction on the connecting cord radially bringing the stitches end conferring on the retaining head an ogival shape allowing non-injurious removal of the orthosis.
- connection of the armature and the sheath by the connecting means allows the components to be free from each other, downstream of the single link portion.
- the device may comprise a radial stent for exerting pressure on the wall of the small intestine, comprising a substantially conical proximal end, the radial stent being engaged on the sheath and the substantially conical proximal end of the radial expander being superimposed on the substantially conical proximal end of the sheath, the connecting means for forming a single connection of the proximal end substantially conical armature, the substantially conical proximal end of the sheath and the substantially conical proximal end of the radial expander.
- the connecting means may comprise a first link which connects, in a single connecting portion, the substantially conical proximal end of the armature and the substantially conical proximal end of the sheath.
- the connecting means may comprise a first link which connects, in a single connecting portion, the substantially conical proximal end of the armature, the substantially conical proximal end of the sheath and the proximal end substantially. taper of the radial expander.
- the connecting means may comprise a second link which connects the substantially conical proximal end of the armature, the substantially conical proximal end of the sheath and the substantially conical proximal end of the radial stent.
- the links make it possible to fix the assembly between the reinforcement, the sheath and the radial expander.
- the substantially conical proximal end of the sheath may comprise a frustoconical portion and a cylindrical portion.
- the cylindrical portion optimizes the contact surface between the proximal end of the sheath and the wall of the small intestine.
- the radial expander may comprise at least one barrel retention portion.
- barrel retention portion is meant a nodoid surface.
- the radial stent may include at least one proximal barrel retaining portion adjacent to the proximal end of the radial stent.
- This positioning of at least one barrel retaining portion optimizes the maintenance of the device in the small intestine.
- said at least one barrel portion may be implanted in the duodenum of the small intestine upstream of the lower duodenal angle.
- the radial stent may include at least one proximal barrel retention portion, an intermediate portion, and at least one distal barrel retention portion.
- said at least one distal barrel retaining portion may be implanted in the duodenum near the duodeno-jejunal angle.
- the radial stent may include two proximal barrel retaining portions, an intermediate portion, and two distal barrel retaining portions.
- the radial expander may comprise at least one substantially conical retaining portion.
- the substantially conical retainer portion When exercising a longitudinal force along the device, the substantially conical retainer portion may deform to maximize the holding of the device in the small intestine.
- the frame may comprise a knit of metal threads.
- the knitting of metallic threads of the substantially conical proximal end of the reinforcement may have an alternation of linking stitches and structural stitches, each connecting stitch occupying a space greater than the space occupied by each stitch of structure and each link mesh being configured to receive the first link.
- At least one mesh of the knit has an angle of between 85 degrees and 90 degrees, with respect to a longitudinal axis of the armature.
- the knitted structure of the frame can allow it to resist the efforts exerted by the small intestine and to keep the sheath open.
- the radial expander may comprise a knit of metal threads. According to one embodiment, at least one mesh of the knit, positioned at the proximal end, may have an angle of between 95 degrees and 110 degrees with respect to a longitudinal axis of the radial expander.
- At least one mesh of the knit positioned at a proximal portion juxtaposed at the proximal end, has an angle of between 40 degrees and 45 degrees, relative to a longitudinal axis of the radial expander. .
- the presence of at least one mesh having an angle of between 40 degrees and 45 degrees with respect to a longitudinal axis of the radial expander prevents the radial deformation of said mesh during the exercise of an axial force and allows the transmission of the force along the stent towards its retaining part.
- At least one mesh of the knit, positioned on a proximal portion juxtaposed at the proximal end, may have an angle of between 25 degrees and 35 degrees, relative to a longitudinal axis of the radial expander.
- At least one mesh of the knit may have an angle of between 60 and 70 degrees with respect to a longitudinal axis of the radial expander.
- At least one mesh of the knit may have an angle of between 70 and 80 degrees with respect to a longitudinal axis of the radial expander.
- the knitted structure of the radial expander allows it to present an elasticity necessary for the exercise of pressure on the duodenal wall.
- the proximal end of the sheath may comprise at least one bore for receiving the connection means of the armature, the sheath and the radial expander.
- a proximal portion juxtaposed at the proximal end of the sheath may comprise at least one bore for receiving the connection means of the armature, the sheath and the radial expander.
- the proximal end of the sheath may have an ogival geometry.
- This technical provision makes it possible to facilitate the extraction of the device according to the invention while preserving the integrity of the tissues.
- FIG. 1 and 2 show in perspective an implantable device according to a first embodiment
- FIG. 3 represents the proximal portion of the device frame
- FIG. 4 represents the proximal portion of the device of FIGS. 1 and 2 in the extraction configuration
- FIGS. 7 to 11 show a second embodiment of the device according to the invention.
- FIG. 12 to 14 show a third embodiment of the device according to the invention.
- FIGS. 15 to 17 show a fourth embodiment of the device according to the invention.
- FIG. 18 is a perspective view of the implantable device according to an embodiment implanted in a duodenum.
- Figure 1 shows a device 1 implantable in a duodenum D.
- the device 1 has two ends which are defined, by convention, as a proximal end and a distal end.
- the device 1 comprises a frame 2 and a sheath 4.
- the device is shown in the figures in its deployed configuration.
- the frame 2 is formed of knitted, braided, or woven wire mesh which forms the cylindrical body of the frame.
- the son forming the mesh may consist of a metal alloy shape memory stainless steel optionally comprising nickel, titanium, cobalt-chromium or platinum-chromium.
- the device 1 has a retaining head 3 which is constituted by a radial enlargement made in the bottom mesh which forms a cylindrical body.
- the retaining head 3 comprises a cylindrical portion 30 and a substantially frustoconical portion 31 which joins the body 5.
- Figure 3 shows the retaining head 3 without the sheath 4 on an enlarged scale and can be seen in this figure one of the important provisions of the invention.
- the retaining head 3 has, at its free end, a series of bottom meshes 10 - which constitutes the mesh of the reinforcement - interposed with a series of end stitches 9 which protrude from the stitches bottom 10 in the axial direction of the device.
- the sheath 4 is made of an impermeable material which may be, for example, an elastic silicone film or a teflon film. Thus, the sheath may have a thickness of between 0.03 millimeters and 0.07 millimeters. The sheath can itself have a proximal enlargement to follow the geometry of the frame. The sheath 4 is indeed slid over the frame 2.
- the armature 2 and the sheath 4 are connected by a connecting bead 16.
- the connecting bead 16 engaged in the end stitches of the armature 2 and in bores 44 made sheath 4 as shown in FIGS. 5 and 6.
- a connecting bead 16 may also be arranged at the distal end of the device to bind the armature 2 and the sheath 4
- the device is placed on an endoscopic device.
- the device is therefore contracted radially to a diameter D1 to be engaged on the endoscopic apparatus.
- the device can be implanted by natural means to be placed in the small intestine.
- the armature expands radially to a diameter D2 and bears against the wall of the small intestine.
- the retaining head 3 which has a greater diameter D3 greater than the diameter D2 of the body 5 of the armature ensures anchoring of the device in the wall of the intestine.
- the chyme resulting from the decomposition of food by the stomach has a pH substantially equal to 2.
- the secretions from the Vater V ampoule allow the pH of the chyle to be raised to 5 or 6.
- the positioning of the device 1 makes it possible in particular to maintain the operation of the Vater V ampoule, which allows the device to be particularly well tolerated by the patient's body.
- the chyle At the outlet of the device, the chyle has a pH tending toward the neutral pH.
- the device 1 extends to the jejunum J of the patient.
- the device 1 therefore limits the majority of nutrient absorption.
- chyle enters the device 1 through the proximal end 11.
- the sheath 4 has a barrier function between the wall of the small intestine and chyle. Thus, the body does not absorb the nutrients present in chyle.
- the armature 2 makes it possible to keep the sheath 4 open, that is to say to keep the light in the sheath 4.
- the retaining head 3 provides a non-injurious anchoring of the device in the intestine.
- the connecting cord 16 ensures its side holding the sheath on the frame despite the peristaltic movements of the intestine.
- the device according to the invention is not intended to be implanted permanently in the body of a patient.
- a practitioner exerts, endoscopically, traction on the proximal connecting cord 16. This has the effect of bringing the end meshes radially closer to the retaining head 3.
- the retaining head 3 then takes an ogival shape as can be seen in Figure 5 which contributes to easy removal and non-injurious device.
- the device 1 comprises the armature 2, the sheath 4 and a radial expander 6a or 6b or 6c or 6d which accentuates the retention of the device.
- the radial expander 6a or 6b or 6c or 6d has a substantially tubular geometry.
- the radial expander 6a or 6b or 6c or 6d may be made of a knitted metal mesh.
- the metal mesh may be made of a stainless steel alloy comprising nickel and titanium.
- the radial expander 6a or 6b or 6c or 6d has a proximal end 61 which has a substantially frustoconical section 62 and a substantially cylindrical portion 63.
- the substantially frustoconical section 62 and the substantially cylindrical portion 63 may be obtained during the knitting of the radial expander 6a or 6b or 6c or 6d.
- the radial stent 6a comprises two proximal barrel retaining portions 65 positioned near the proximal end 61.
- the knit forming the radial expander 6a has several mesh angles, with respect to a longitudinal axis of the radial expander 6a.
- the mesh positioned at the proximal end 61 has an angle ⁇ between 95 and 110 degrees with respect to a longitudinal axis of the radial expander 6a.
- the radial stent 6b comprises two proximal barrel retention portions 65, an intermediate portion 66 and two distal barrel retaining portions 67.
- the two distal barrel retaining portions 67 are intended to be implanted in the duodenum D near a duodeno-jejunal angle A.
- the knit forming the radial expander 6b has several mesh angles with respect to a longitudinal axis of the radial stent 6b.
- the mesh positioned at the proximal end 61 has an angle ⁇ between 95 and 110 degrees with respect to a longitudinal axis of the radial expander 6b.
- the meshes positioned at the intermediate portion 66 and downstream of the distal barrel retaining portion 67, have an angle ⁇ substantially equal to 75 degrees.
- the radial stent 6c comprises a proximal barrel retaining portion 65, separated from the proximal end 61 by a proximal portion 64.
- the proximal portion 64 has a tubular geometry.
- the radial expander 6c has at least three different mesh angles.
- the mesh positioned at the proximal end 61 has an angle ⁇ substantially equal to 101.7 degrees with respect to a longitudinal axis of the radial expander 6c.
- the mesh positioned at the proximal portion 64 has an angle ⁇ 'substantially equal to 42.25 degrees with respect to a longitudinal axis of the radial expander 6c.
- the mesh positioned downstream of the barrel retaining portion 65, has an angle ⁇ substantially equal to 65.75 degrees.
- the difference of the three mesh angles ⁇ , ⁇ 'and ⁇ allows the radial expander 6c to maximize the holding of the device 1 in a small intestine during the exercise. a longitudinal force on the device 1.
- the radial stent 6d comprises a substantially conical retaining portion 68, separated from the proximal end 61 by a proximal portion 64.
- the radial expander 6d has at least three different mesh angles.
- the mesh positioned at the proximal end 61 has an angle ⁇ substantially equal to 103 degrees with respect to a longitudinal axis of the radial expander 6d.
- the mesh, positioned on the proximal portion 64 has an angle ⁇ 'substantially equal to 29 degrees with respect to a longitudinal axis of the radial expander 6d.
- the mesh positioned downstream of the substantially conical retaining portion 68, has an angle ⁇ substantially equal to 78 degrees.
- the difference of the three mesh angles ⁇ , ⁇ 'and ⁇ allows the radial expander 6d to maximize the holding of the device 1 in a small intestine during the exercise. a longitudinal force on the device 1.
- the assembly of the device 1 is made by fitting the sheath 4 on the frame 2.
- the proximal end 41 of the sheath 4 is superimposed on the proximal end 21 of the frame 2.
- the first link 8 is then introduced between the stitches of the frame 2.
- the link 8 is also introduced into the holes 44.
- the radial expander 6a or 6b or 6c or 6d is engaged on the sheath 4.
- the proximal end 61 of the radial expander 6a or 6b or 6c or 6d is superimposed on the end proximal 41 of the sheath 4.
- the first link 8 is then introduced between the meshes of the radial expander 6a or 6b or 6c or 6d and of the armature 2 into the holes 4, to fix the assembly of the device 1 .
- the armature 2, the sheath 4 and the radial expander 6a or 6b or 6c or 6d are thus secured by the first link 8.
- the radial expander 6a or 6b or 6c or 6d then bears against the wall of the duodenum D and ensures the retention of the device 1.
- the presence of barrel retaining portions 65-67 of the stents 6a-6b-6c-6d, or of a substantially conical retaining portion 68 makes it possible to locally increase the pressure of the radial expander 6a or 6b or 6c or 6d on the duodenal wall.
- the angle of the stitches of the radial stent 6a or 6b or 6c or 6d can make it possible to transform axial forces, due to movements of the small intestine, into radial forces exerted by the proximal barrel retainer 65, or substantially conical retainer portion 68, on the duodenal wall.
- the device 1 is maintained in the small intestine and resists movement of the small intestine.
- FIG. 16 shows the deformation of the radial expander 6d under the stress of a longitudinal compressive force.
- the angle ⁇ 'of the meshes of the proximal portion 64 decreases the deformation capacity of these meshes under the exercise of longitudinal compression.
- the meshes of the proximal portion 64 can only weakly deform and transmit the force to the substantially conical retaining portion 68.
- the radial expander 6d can use the forces exerted on the device 1 to increase the strength of the device 1 in the small intestine.
- Fixing the device 1 by the stent 6a or 6b or 6c or 6d allows the device 1 to be removed from the small intestine without risk of tissue injury.
- the combination of the armature 2 and the sheath 4 makes it possible to position the device 1 in the descending part of a duodenum D, downstream of the Vater V bulb. Such a positioning makes it possible to preserve a maximum of biological functions of the small intestine, which allows a better tolerance of the device by the body of the patient.
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Abstract
Description
Dispositif implantable de traitement des désordres métaboliques Implantable device for treating metabolic disorders
La présente invention concerne un dispositif implantable de traitement des désordres métaboliques. The present invention relates to an implantable device for treating metabolic disorders.
L'obésité est une pathologie touchant un nombre croissant de personnes. Obesity is a pathology affecting a growing number of people.
Lorsqu'elle est sévère, cette pathologie accroît la mortalité liée aux comorbidités telles que : les maladies cardiovasculaires, le diabète de type 2, l'apnée du sommeil, l'arthrose des articulations portantes, etc. When it is severe, this pathology increases mortality related to comorbidities such as: cardiovascular diseases, type 2 diabetes, sleep apnea, osteoarthritis of the weight-bearing joints, etc.
Les gaines endoluminales constituent une méthode de traitement de l'obésité. Endoluminal sheaths are a method of treating obesity.
Ces gaines sont positionnées dans l'intestin grêle d'un patient, pour limiter l'absorption des nutriments par la paroi de l'intestin grêle. These sheaths are positioned in the small intestine of a patient, to limit the absorption of nutrients through the lining of the small intestine.
Le plus souvent, ces gaines sont ancrées au travers de l'orifice pylorique ou éventuellement dans l'orifice biliaire de l'intestin grêle du patient. Most often, these sheaths are anchored through the pyloric orifice or possibly into the biliary orifice of the small intestine of the patient.
L'estomac et l'intestin grêle sont animés de mouvements péristaltiques et segmentaires permettant le déplacement et l'absorption des aliments ingérés. The stomach and the small intestine are animated with peristaltic and segmental movements allowing the displacement and the absorption of the ingested food.
Ces mouvements rendent difficile le maintien en position d'une gaine, qui risque de migrer et de provoquer une occlusion intestinale. These movements make it difficult to hold a sheath in position, which may migrate and cause bowel obstruction.
Pour éviter ce risque, les gaines endoluminales peuvent être fixées par des crochets plantés dans la paroi duodénale, ou par des moyens de retenue traversant le pylore. To avoid this risk, the endoluminal sheaths can be fixed by hooks planted in the duodenal wall, or by retaining means passing through the pylorus.
Ce mode de fixation peut être traumatisant pour les tissus. De plus, ce mode de fixation augmente les risques de perforation de l'intestin grêle, d'infection et d'hémorragie. This mode of attachment can be traumatic for the tissues. In addition, this mode of attachment increases the risk of perforation of the small intestine, infection and hemorrhage.
Dans ce contexte technique, la présente invention a pour objectif de fournir un dispositif, qui puisse être implanté dans un intestin grêle en préservant l'intégrité des tissus et qui limite l'absorption des nutriments par l'intestin grêle. In this technical context, the present invention aims to provide a device that can be implanted in a small intestine preserving the integrity of tissues and limits the absorption of nutrients by the small intestine.
Selon une définition générale, l'invention concerne un dispositif implantable dans un intestin grêle, qui comprend : According to a general definition, the invention relates to an implantable device in a small intestine, which comprises:
- une armature formée de fils métallique en mailles tricotées, tressées ou tissées, radialement expansible entre une position contractée d'introduction ayant un diamètre Dl et une position déployée dans laquelle l'armature présente un corps ayant un diamètre D2 supérieur au diamètre Dl destiné à exercer un appui sur la paroi de l'intestin grêle et, à une extrémité proximale et une tête de retenue ayant un diamètre D3 selon un diamètre supérieur au diamètre D2, destinée à former une anneau de retenue sur la paroi de l'intestin, - une gaine chaussée sur l'armature destinée à limiter l'absorption des nutriments par la paroi de l'intestin grêle, comprenant une extrémité proximale superposée sur la tête de retenue de l'armature et une partie distale superposée sur le corps de l'armature, an armature formed of metal wires in knitted, braided or woven mesh, radially expandable between a contracted insertion position having a diameter D1 and a deployed position in which the armature has a body having a diameter D2 greater than the diameter D1 intended for exert a bearing on the wall of the small intestine and, at a proximal end and a retaining head having a diameter D3 with a diameter greater than the diameter D2, intended to form a retaining ring on the wall of the intestine, - a sheath on the frame for limiting the absorption of nutrients through the wall of the small intestine, comprising a proximal end superimposed on the armature retaining head and a distal portion superimposed on the body of the frame,
- un cordon de liaison reliant l'armature et la gaine, formant une liaison unique de l'extrémité proximale de l'armature et de l'extrémité proximale de la gaine permettant de retenir la gaine sur l'armature et permettant de contracter radialement l'armature pour permettre le retrait du dispositif. a connecting cord connecting the armature and the sheath, forming a single connection of the proximal end of the armature and of the proximal end of the sheath making it possible to retain the sheath on the armature and making it possible to radially contract the armature; frame to allow removal of the device.
Ainsi, l'armature permet de maintenir le dispositif dans un intestin grêle en préservant l'intégrité des tissus. De plus, la gaine permet de limiter l'absorption des nutriments par la paroi de l'intestin grêle. Thus, the armature keeps the device in a small intestine while preserving the integrity of the tissues. In addition, the sheath limits the absorption of nutrients through the lining of the small intestine.
Le dispositif selon l'invention fonctionne par la combinaison de ses deux composants. L'armature permet de maintenir le dispositif dans un intestin grêle sans être blessant pour les tissus et permet de conserver la lumière dans la gaine, c'est-à- dire de maintenir la gaine ouverte tandis que la gaine permet de limiter l'absorption des nutriments par la paroi de l'intestin grêle. The device according to the invention functions by the combination of its two components. The armature keeps the device in a small intestine without being harmful to the tissue and keeps the light in the sheath, that is to say, keep the sheath open while the sheath allows to limit the absorption nutrients through the lining of the small intestine.
La combinaison de l'armature et la gaine permet de positionner le dispositif dans la partie descendante d'un intestin grêle en aval de l'ampoule de Vater. Un tel positionnement permet de conserver un maximum de fonctions biologiques de l'intestin grêle, ce qui autorise une meilleure tolérance du dispositif par l'organisme du patient. The combination of the armature and the sheath allows the device to be positioned in the descending part of a small intestine downstream of the vater bulb. Such positioning allows to retain a maximum of biological functions of the small intestine, which allows a better tolerance of the device by the body of the patient.
De préférence, la tête de retenue présente, à son extrémité libre, une série de mailles de fond intercalées avec une série de mailles d'extrémité dans lesquelles est engagé le cordon de liaison, une traction sur le cordon de liaison rapprochant radialement les mailles d'extrémité conférant à la tête de retenue une forme ogivale permettant un retrait non blessant de l'orthèse. Preferably, the retaining head has, at its free end, a series of bottom meshes interposed with a series of end stitches in which the binding cord is engaged, a traction on the connecting cord radially bringing the stitches end conferring on the retaining head an ogival shape allowing non-injurious removal of the orthosis.
En outre, la liaison de l'armature et la gaine par les moyens de liaison, permet aux composants d'être libres les uns par rapport aux autres, en aval de la portion de liaison unique. In addition, the connection of the armature and the sheath by the connecting means, allows the components to be free from each other, downstream of the single link portion.
Selon une disposition particulière, le dispositif peut comprendre un extenseur radial destiné à exercer une pression sur la paroi de l'intestin grêle, comprenant une extrémité proximale sensiblement conique, l'extenseur radial étant engagé sur la gaine et l'extrémité proximale sensiblement conique de l'extenseur radial étant superposée à l'extrémité proximale sensiblement conique de la gaine, les moyens de liaison permettant de former une liaison unique de l'extrémité proximale sensiblement conique de l'armature, de l'extrémité proximale sensiblement conique de la gaine et de l'extrémité proximale sensiblement conique de l'extenseur radial. According to a particular arrangement, the device may comprise a radial stent for exerting pressure on the wall of the small intestine, comprising a substantially conical proximal end, the radial stent being engaged on the sheath and the substantially conical proximal end of the radial expander being superimposed on the substantially conical proximal end of the sheath, the connecting means for forming a single connection of the proximal end substantially conical armature, the substantially conical proximal end of the sheath and the substantially conical proximal end of the radial expander.
Selon un mode de réalisation, les moyens de liaison peuvent comprendre un premier lien qui relie, en une portion de liaison unique, l'extrémité proximale sensiblement conique de l'armature et l'extrémité proximale sensiblement conique de la gaine. According to one embodiment, the connecting means may comprise a first link which connects, in a single connecting portion, the substantially conical proximal end of the armature and the substantially conical proximal end of the sheath.
Selon une disposition particulière, les moyens de liaison peuvent comprendre un premier lien qui relie, en une portion de liaison unique, l'extrémité proximale sensiblement conique de l'armature, l'extrémité proximale sensiblement conique de la gaine et l'extrémité proximale sensiblement conique de l'extenseur radial. According to one particular arrangement, the connecting means may comprise a first link which connects, in a single connecting portion, the substantially conical proximal end of the armature, the substantially conical proximal end of the sheath and the proximal end substantially. taper of the radial expander.
Cette disposition technique permet de renforcer l'action de l'extenseur radial. En effet, la liberté relative de chaque composant et les moyens de liaisons permettent de convertir un effort de traction axiale sur la gaine en expansion radiale de l'extenseur radial. Ainsi, une traction exercée sur la gaine peut augmenter la retenue du dispositif. This technical arrangement makes it possible to reinforce the action of the radial expander. In fact, the relative freedom of each component and the connecting means make it possible to convert an axial tensile force on the radially expanding sheath of the radial expander. Thus, traction exerted on the sheath can increase the retention of the device.
De plus, les moyens de liaison peuvent comprendre un second lien qui relie l'extrémité proximale sensiblement conique de l'armature, l'extrémité proximale sensiblement conique de la gaine et l'extrémité proximale sensiblement conique de l'extenseur radial. In addition, the connecting means may comprise a second link which connects the substantially conical proximal end of the armature, the substantially conical proximal end of the sheath and the substantially conical proximal end of the radial stent.
Les liens permettent de fixer l'assemblage entre l'armature, la gaine et l'extenseur radial. The links make it possible to fix the assembly between the reinforcement, the sheath and the radial expander.
L'extrémité proximale sensiblement conique de la gaine peut comprendre une portion tronconique et une portion cylindrique. The substantially conical proximal end of the sheath may comprise a frustoconical portion and a cylindrical portion.
La portion cylindrique permet d'optimiser la surface de contact entre l'extrémité proximale de la gaine et la paroi de l'intestin grêle. The cylindrical portion optimizes the contact surface between the proximal end of the sheath and the wall of the small intestine.
L'extenseur radial peut comprendre au moins une partie de retenue en tonneau. The radial expander may comprise at least one barrel retention portion.
Il est précisé que, par partie de retenue en tonneau, on entend une surface nodoïde. It is specified that, by barrel retention portion, is meant a nodoid surface.
Ladite au moins une partie de retenue en tonneau permet d'augmenter localement la pression exercée par l'extenseur radial sur la paroi de l'intestin grêle. D'une manière particulièrement avantageuse, ladite au moins une partie de retenue en tonneau maximise le maintien du dispositif. Selon un premier mode de réalisation, l'extenseur radial peut comprendre au moins une partie de retenue en tonneau proximale, adjacente à l'extrémité proximale de l'extenseur radial. Said at least one barrel retaining portion locally increases the pressure exerted by the radial stent on the wall of the small intestine. In a particularly advantageous manner, said at least one barrel-retaining portion maximizes the holding of the device. In a first embodiment, the radial stent may include at least one proximal barrel retaining portion adjacent to the proximal end of the radial stent.
Ce positionnement d'au moins une partie de retenue en tonneau permet d'optimiser le maintien du dispositif dans l'intestin grêle. This positioning of at least one barrel retaining portion optimizes the maintenance of the device in the small intestine.
D'une manière avantageuse, ladite au moins une partie en tonneau peut être implantée dans le duodénum de l'intestin grêle, en amont de l'angle duodénal inférieur. Advantageously, said at least one barrel portion may be implanted in the duodenum of the small intestine upstream of the lower duodenal angle.
Selon un second mode de réalisation, l'extenseur radial peut comprendre au moins une partie de retenue en tonneau proximale, une portion intermédiaire et au moins une partie de retenue en tonneau distale. In a second embodiment, the radial stent may include at least one proximal barrel retention portion, an intermediate portion, and at least one distal barrel retention portion.
D'une manière particulièrement avantageuse, ladite au moins une partie de retenue en tonneau distale, peut être implantée dans le duodénum, à proximité de l'angle duodéno-jéjunal. In a particularly advantageous manner, said at least one distal barrel retaining portion may be implanted in the duodenum near the duodeno-jejunal angle.
En outre, l'extenseur radial peut comprendre deux parties de retenue en tonneaux proximales, une portion intermédiaire et deux parties de retenue en tonneaux distales. In addition, the radial stent may include two proximal barrel retaining portions, an intermediate portion, and two distal barrel retaining portions.
Selon un mode de réalisation, l'extenseur radial peut comprendre au moins une partie de retenue sensiblement conique. According to one embodiment, the radial expander may comprise at least one substantially conical retaining portion.
Lors de l'exercice d'un effort longitudinal le long du dispositif, la partie de retenue sensiblement conique peut se déformer pour maximiser la tenue du dispositif dans l'intestin grêle. When exercising a longitudinal force along the device, the substantially conical retainer portion may deform to maximize the holding of the device in the small intestine.
L'armature peut comprendre un tricot de fils métalliques. The frame may comprise a knit of metal threads.
Le tricot de fils métalliques de l'extrémité proximale sensiblement conique de l'armature peut présenter une alternance de mailles de liaison et de mailles de structure, chaque maille de liaison occupant un espace supérieur à l'espace occupé par chaque maille de structure et chaque maille de liaison étant configurée pour recevoir le premier lien. The knitting of metallic threads of the substantially conical proximal end of the reinforcement may have an alternation of linking stitches and structural stitches, each connecting stitch occupying a space greater than the space occupied by each stitch of structure and each link mesh being configured to receive the first link.
Cette disposition technique permet de faciliter l'extraction du dispositif selon l'invention. This technical provision facilitates the extraction of the device according to the invention.
Selon un mode de réalisation, au moins une maille du tricot présente un angle compris entre 85 degrés et 90 degrés, par rapport à un axe longitudinal de l'armature. According to one embodiment, at least one mesh of the knit has an angle of between 85 degrees and 90 degrees, with respect to a longitudinal axis of the armature.
La structure tricotée de l'armature peut lui permettre de résister aux efforts exercés par l'intestin grêle et de maintenir la gaine ouverte. The knitted structure of the frame can allow it to resist the efforts exerted by the small intestine and to keep the sheath open.
L'extenseur radial peut comprendre un tricot de fils métalliques. Selon un mode de réalisation, au moins une maille du tricot, positionnée au niveau de l'extrémité proximale, peut présenter un angle compris entre 95 degrés et 110 degrés par rapport à un axe longitudinal de l'extenseur radial. The radial expander may comprise a knit of metal threads. According to one embodiment, at least one mesh of the knit, positioned at the proximal end, may have an angle of between 95 degrees and 110 degrees with respect to a longitudinal axis of the radial expander.
Selon un mode de réalisation, au moins une maille du tricot, positionnée au niveau d'une portion proximale juxtaposée à l'extrémité proximale, présente un angle compris entre 40 degrés et 45 degrés, par rapport à un axe longitudinal de l'extenseur radial. According to one embodiment, at least one mesh of the knit, positioned at a proximal portion juxtaposed at the proximal end, has an angle of between 40 degrees and 45 degrees, relative to a longitudinal axis of the radial expander. .
La présence d'au moins une maille présentant un angle compris entre 40 degrés et 45 degrés par rapport à un axe longitudinal de l'extenseur radial, empêche la déformation radiale de ladite maille lors de l'exercice d'un effort axial et permet la transmission de l'effort le long de l'extenseur vers sa partie de retenue. The presence of at least one mesh having an angle of between 40 degrees and 45 degrees with respect to a longitudinal axis of the radial expander, prevents the radial deformation of said mesh during the exercise of an axial force and allows the transmission of the force along the stent towards its retaining part.
Ainsi, dans le cas, par exemple, où de telles mailles sont positionnées en amont d'une partie de retenue. Ces mailles permettent la transmission d'un effort axial vers la partie de retenue pour expanser la partie de retenue et accentuer la pression exercer sur la paroi de l'intestin grêle. Thus, in the case, for example, where such meshes are positioned upstream of a retaining part. These meshes allow the transmission of an axial force to the retaining portion to expand the retaining portion and increase the pressure exerted on the wall of the small intestine.
Selon un autre mode de réalisation, au moins une maille du tricot, positionnée sur une portion proximale juxtaposée à l'extrémité proximale, peut présenter un angle compris entre 25 degrés et 35 degrés, par rapport à un axe longitudinal de l'extenseur radial. According to another embodiment, at least one mesh of the knit, positioned on a proximal portion juxtaposed at the proximal end, may have an angle of between 25 degrees and 35 degrees, relative to a longitudinal axis of the radial expander.
La présence d'au moins une maille présentant un angle compris entre 25 degrés et 35 degrés par rapport à un axe longitudinal de l'extenseur radial, empêche la déformation radiale de ladite maille lors de l'exercice d'un effort axial et permet la transmission de l'effort le long de l'extenseur vers sa partie de retenue. The presence of at least one mesh having an angle of between 25 degrees and 35 degrees with respect to a longitudinal axis of the radial expander, prevents the radial deformation of said mesh during the exercise of axial force and allows the transmission of the force along the stent towards its retaining part.
Ainsi, dans le cas, par exemple, où de telles mailles sont positionnées en amont d'une partie de retenue. Ces mailles permettent la transmission d'un effort axial vers la partie de retenue pour expanser la partie de retenue et accentuer la pression exercer sur la paroi de l'intestin grêle. Thus, in the case, for example, where such meshes are positioned upstream of a retaining part. These meshes allow the transmission of an axial force to the retaining portion to expand the retaining portion and increase the pressure exerted on the wall of the small intestine.
Selon un mode de réalisation, au moins une maille du tricot peut présenter un angle compris entre 60 et 70 degrés par rapport à un axe longitudinal de l'extenseur radial. According to one embodiment, at least one mesh of the knit may have an angle of between 60 and 70 degrees with respect to a longitudinal axis of the radial expander.
Selon un autre mode de réalisation, au moins une maille du tricot peut présenter un angle compris entre 70 et 80 degrés par rapport à un axe longitudinal de l'extenseur radial. According to another embodiment, at least one mesh of the knit may have an angle of between 70 and 80 degrees with respect to a longitudinal axis of the radial expander.
Ainsi, la structure tricotée de l'extenseur radial lui permet de présenter une élasticité nécessaire à l'exercice d'une pression sur la paroi duodénale. L'extrémité proximale de la gaine peut comprendre au moins un perçage destiné à recevoir les moyens de liaisons de l'armature, la gaine et l'extenseur radial. Thus, the knitted structure of the radial expander allows it to present an elasticity necessary for the exercise of pressure on the duodenal wall. The proximal end of the sheath may comprise at least one bore for receiving the connection means of the armature, the sheath and the radial expander.
Une portion proximale juxtaposée à l'extrémité proximale de la gaine peut comprendre au moins un perçage destiné à recevoir les moyens de liaison de l'armature, la gaine et l'extenseur radial. A proximal portion juxtaposed at the proximal end of the sheath may comprise at least one bore for receiving the connection means of the armature, the sheath and the radial expander.
Selon un mode de réalisation, l'extrémité proximale de la gaine peut présenter une géométrie ogivale. According to one embodiment, the proximal end of the sheath may have an ogival geometry.
Cette disposition technique permet de faciliter l'extraction du dispositif selon l'invention en préservant l'intégrité des tissus. This technical provision makes it possible to facilitate the extraction of the device according to the invention while preserving the integrity of the tissues.
D'autres caractéristiques et avantages de l'invention se dégageront de la description qui va suivre, en regard des dessins annexés qui représentent plusieurs formes de réalisation de l'invention, étant précisé que les éléments communs aux différentes formes de réalisation portent les mêmes références. Other features and advantages of the invention will emerge from the description which follows, with reference to the accompanying drawings which show several embodiments of the invention, it being specified that the elements common to the various embodiments have the same references. .
- Les figures 1 et 2 montrent en perspective un dispositif implantable selon un premier mode de réalisation ; - Figures 1 and 2 show in perspective an implantable device according to a first embodiment;
- La figure 3 représente la partie proximale de l'armature du dispositif FIG. 3 represents the proximal portion of the device frame
- La figure 4 représente la partie proximale du dispositif des figures 1 et 2 en configuration d'extraction ; FIG. 4 represents the proximal portion of the device of FIGS. 1 and 2 in the extraction configuration;
- Les figures 4 et 5 montrent la gaine du dispositif ; - Figures 4 and 5 show the sheath of the device;
- Les figures 7 à 11 montrent un deuxième mode de réalisation du dispositif selon l'invention ; FIGS. 7 to 11 show a second embodiment of the device according to the invention;
- Les figures 12 à 14 montrent un troisième mode de réalisation du dispositif selon l'invention ; - Figures 12 to 14 show a third embodiment of the device according to the invention;
- Les figures 15 à 17 montrent une quatrième mode de réalisation du dispositif selon l'invention ; FIGS. 15 to 17 show a fourth embodiment of the device according to the invention;
- la figure 18 est une vue en perspective du dispositif implantable selon un mode de réalisation implanté dans un duodénum. - Figure 18 is a perspective view of the implantable device according to an embodiment implanted in a duodenum.
La figure 1 présente un dispositif 1 implantable dans un duodénum D. Figure 1 shows a device 1 implantable in a duodenum D.
Le dispositif 1 présente deux extrémités qui se définissent, par convention, comme une extrémité proximale et une extrémité distale. The device 1 has two ends which are defined, by convention, as a proximal end and a distal end.
Selon un premier mode de réalisation, le dispositif 1 comprend une armature 2 et une gaine 4. According to a first embodiment, the device 1 comprises a frame 2 and a sheath 4.
Le dispositif est représenté sur les figures dans sa configuration déployée. The device is shown in the figures in its deployed configuration.
L'armature 2 est formée de fils métallique en maille tricotées, tressées, ou tissées qui forme le corps 5 cylindrique de l'armature. De façon classique, les fils formant la maille peuvent être constitués d'un alliage métallique à mémoire de forme en acier inoxydable comprenant éventuellement du nickel, du titane, du cobalt-chrome ou platine-chrome. The frame 2 is formed of knitted, braided, or woven wire mesh which forms the cylindrical body of the frame. Conventionally, the son forming the mesh may consist of a metal alloy shape memory stainless steel optionally comprising nickel, titanium, cobalt-chromium or platinum-chromium.
A son extrémité distale, le dispositif 1 présente une tête de retenue 3 qui est constituée par un élargissement radial pratiqué dans la maille de fond qui forme un corps 5 cylindrique. At its distal end, the device 1 has a retaining head 3 which is constituted by a radial enlargement made in the bottom mesh which forms a cylindrical body.
Dans le mode de réalisation représenté aux figures 1 à 4, la tête de retenue 3 comprend une partie cylindrique 30 et une partie sensiblement tronconique 31 qui assure la jonction avec le corps 5. In the embodiment shown in FIGS. 1 to 4, the retaining head 3 comprises a cylindrical portion 30 and a substantially frustoconical portion 31 which joins the body 5.
La figure 3 montre la tête de retenue 3 dépourvue de la gaine 4 à une échelle agrandie et on peut voir sur cette figure l'une des dispositions importantes de l'invention. Figure 3 shows the retaining head 3 without the sheath 4 on an enlarged scale and can be seen in this figure one of the important provisions of the invention.
Comme cela apparaît sur cette figure, la tête de retenue 3 présente, à son extrémité libre, une série de mailles de fond 10 - qui constitue le maillage de l'armature - intercalées avec une série de mailles d'extrémité 9 qui dépassent des mailles de fond 10 dans la direction axiale du dispositif. As shown in this figure, the retaining head 3 has, at its free end, a series of bottom meshes 10 - which constitutes the mesh of the reinforcement - interposed with a series of end stitches 9 which protrude from the stitches bottom 10 in the axial direction of the device.
Dans cet exemple de réalisation de l'invention, on voit donc une maille d'extrémité intercalée avec une maille de fond. En d'autres termes, la tête de retenue 3 est pourvue à son extrémité libre de mailles de longueurs inégales selon un pas régulier. On verra plus loin la fonction et l'intérêt de cette disposition. In this embodiment of the invention, we therefore see an end mesh interposed with a bottom mesh. In other words, the retaining head 3 is provided at its free end with stitches of unequal length in a regular pitch. We will see later the function and interest of this provision.
La gaine 4 est réalisée dans un matériau imperméable qui peut être, par exemple, un film de silicone élastique ou un film de téflon. Ainsi, la gaine peut présenter une épaisseur comprise entre 0,03 millimètres et 0,07 millimètres. La gaine peut elle-même dotée d'un élargissement proximale pour suivre la géométrie de l'armature. La gaine 4 est en effet glissée sur la l'armature 2. The sheath 4 is made of an impermeable material which may be, for example, an elastic silicone film or a teflon film. Thus, the sheath may have a thickness of between 0.03 millimeters and 0.07 millimeters. The sheath can itself have a proximal enlargement to follow the geometry of the frame. The sheath 4 is indeed slid over the frame 2.
L'armature 2 et la gaine 4 sont liées par un cordon de liaison 16. Comme on peut le voir sur la figure 4, le cordon de liaison 16 en engagé dans les mailles d'extrémité de l'armature 2 et dans des perçages 44 pratiquées la gaine 4 comme cela est montrée aux figure 5 et 6. The armature 2 and the sheath 4 are connected by a connecting bead 16. As can be seen in FIG. 4, the connecting bead 16 engaged in the end stitches of the armature 2 and in bores 44 made sheath 4 as shown in FIGS. 5 and 6.
Optionnellement, un cordon de liaison 16 peut également être disposé à l'extrémité distale du dispositif pour lier l'armature 2 et la gaine 4 Optionally, a connecting bead 16 may also be arranged at the distal end of the device to bind the armature 2 and the sheath 4
Pour sa mise en place, le dispositif est placé sur un appareil endoscopique. Le dispositif est pour cela contracté radialement selon un diamètre Dl pour être engagée sur l'appareil endoscopique. Dans cette configuration, le dispositif peut être implanté par des voies naturelles pour être placé dans l'intestin grêle. Après retrait de l'appareil endoscopique, l'armature s'expanse radialement selon un diamètre D2 et vient en appui contre la paroi de l'intestin grêle. La tête de retenue 3 qui présente un diamètre supérieur D3 supérieur au diamètre D2 du corps 5 de l'armature assure un ancrage du dispositif dans la paroi de l'intestin. For its implementation, the device is placed on an endoscopic device. The device is therefore contracted radially to a diameter D1 to be engaged on the endoscopic apparatus. In this configuration, the device can be implanted by natural means to be placed in the small intestine. After removal of the endoscopic apparatus, the armature expands radially to a diameter D2 and bears against the wall of the small intestine. The retaining head 3 which has a greater diameter D3 greater than the diameter D2 of the body 5 of the armature ensures anchoring of the device in the wall of the intestine.
En pratique, l'ensemble de ces dispositions techniques permettent à l'extrémité proximale 11 du dispositif 1 d'être positionnée dans le duodénum D en aval de l'ampoule de Vater V. In practice, all of these technical provisions allow the proximal end 11 of the device 1 to be positioned in the duodenum D downstream of the Vater V ampule.
Ainsi, les sécrétions issues de l'ampoule de Vater V peuvent se mêler au chyme provenant de l'estomac. Thus, secretions from the Vater V bulb can mingle with chyme from the stomach.
Ces sécrétions ont notamment pour fonction de diminuer l'acidité du chyme provenant de l'estomac pour le transformer en chyle. These secretions have the particular function of reducing the acidity of the chyme from the stomach to turn it into chyle.
En effet, le chyme résultant de la décomposition des aliments par l'estomac présentent un pH sensiblement égal à 2. Indeed, the chyme resulting from the decomposition of food by the stomach has a pH substantially equal to 2.
Les sécrétions issues de l'ampoule de Vater V permettent de faire tendre vers 5 ou 6 le pH du chyle. The secretions from the Vater V ampoule allow the pH of the chyle to be raised to 5 or 6.
Cette réduction de l'acidité favorise la conservation des tissus de l'intestin grêle et du colon. This reduction in acidity promotes the preservation of the tissues of the small intestine and the colon.
Le positionnement du dispositif 1 permet notamment de conserver le fonctionnement de l'ampoule de Vater V, ce qui permet au dispositif d'être particulièrement bien toléré par l'organisme du patient. The positioning of the device 1 makes it possible in particular to maintain the operation of the Vater V ampoule, which allows the device to be particularly well tolerated by the patient's body.
A la sortie du dispositif, le chyle présente un pH tendant vers le pH neutre. At the outlet of the device, the chyle has a pH tending toward the neutral pH.
Dans l'exemple ici présenté, le dispositif 1 s'étend jusqu'au jéjunum J du patient. In the example presented here, the device 1 extends to the jejunum J of the patient.
En effet, l'absorption biologique des nutriments se faisant essentiellement dans le duodénum et le jéjunum, le dispositif 1 permet donc de limiter la majorité de l'absorption des nutriments. Indeed, the biological absorption of nutrients being mainly in the duodenum and the jejunum, the device 1 therefore limits the majority of nutrient absorption.
A l'usage, le chyle pénètre dans le dispositif 1 par l'extrémité proximale 11. In use, chyle enters the device 1 through the proximal end 11.
La gaine 4 a une fonction de barrière entre la paroi de l'intestin grêle et le chyle. Ainsi, l'organisme n'absorbe pas les nutriments présents dans le chyle. The sheath 4 has a barrier function between the wall of the small intestine and chyle. Thus, the body does not absorb the nutrients present in chyle.
L'armature 2 permet de maintenir la gaine 4 ouverte, c'est-à-dire de conserver la lumière dans la gaine 4. The armature 2 makes it possible to keep the sheath 4 open, that is to say to keep the light in the sheath 4.
La tête de retenue 3 assure un ancrage non blessant du dispositif dans l'intestin. Le cordon de liaison 16 assure de son coté de maintien de la gaine sur l'armature malgré les mouvements péristaltiques de l'intestin. Le dispositif selon l'invention n'a pas vocation à être implanté de manière permanente dans l'organisme d'un patient. The retaining head 3 provides a non-injurious anchoring of the device in the intestine. The connecting cord 16 ensures its side holding the sheath on the frame despite the peristaltic movements of the intestine. The device according to the invention is not intended to be implanted permanently in the body of a patient.
Pour effectuer, le retrait du dispositif, un praticien exerce, par voie endoscopique, une traction sur le cordon de liaison 16 proximale. Cela a pour effet de rapprocher radialement les mailles d'extrémité de la tête de retenue 3. La tête de retenue 3 prend alors une forme ogivale comme on peut le voir à la figure 5 qui contribue à un retrait aisé et non blessant du dispositif. To perform the removal of the device, a practitioner exerts, endoscopically, traction on the proximal connecting cord 16. This has the effect of bringing the end meshes radially closer to the retaining head 3. The retaining head 3 then takes an ogival shape as can be seen in Figure 5 which contributes to easy removal and non-injurious device.
Selon un deuxième mode de réalisation, le dispositif 1 comprend l'armature 2, la gaine 4 et un extenseur radial 6a ou 6b ou 6c ou 6d qui accentue la retenue du dispositif. According to a second embodiment, the device 1 comprises the armature 2, the sheath 4 and a radial expander 6a or 6b or 6c or 6d which accentuates the retention of the device.
Quatre extenseurs radiaux 6a, 6b, 6c et 6d sont représentés respectivement sur les figures 7, 13, 14 et 15. Four radial stents 6a, 6b, 6c and 6d are shown respectively in FIGS. 7, 13, 14 and 15.
L'extenseur radial 6a ou 6b ou 6c ou 6d présente une géométrie sensiblement tubulaire. The radial expander 6a or 6b or 6c or 6d has a substantially tubular geometry.
L'extenseur radial 6a ou 6b ou 6c ou 6d peut être réalisé dans une maille métallique tricotée. The radial expander 6a or 6b or 6c or 6d may be made of a knitted metal mesh.
La maille métallique peut être constituée d'un alliage d'acier inoxydable comprenant du nickel et du titane. The metal mesh may be made of a stainless steel alloy comprising nickel and titanium.
L'extenseur radial 6a ou 6b ou 6c ou 6d présente une extrémité proximale 61 qui présente une section sensiblement tronconique 62 et une portion sensiblement cylindrique 63. The radial expander 6a or 6b or 6c or 6d has a proximal end 61 which has a substantially frustoconical section 62 and a substantially cylindrical portion 63.
La section sensiblement tronconique 62 et la portion sensiblement cylindrique 63 peuvent être obtenues au cours du tricotage de l'extenseur radial 6a ou 6b ou 6c ou 6d. The substantially frustoconical section 62 and the substantially cylindrical portion 63 may be obtained during the knitting of the radial expander 6a or 6b or 6c or 6d.
Selon un mode de réalisation présenté sur la figure 7 à 12, l'extenseur radial 6a comprend deux parties de retenue en tonneaux proximales 65 positionnées à proximité de l'extrémité proximale 61. According to an embodiment shown in FIGS. 7 to 12, the radial stent 6a comprises two proximal barrel retaining portions 65 positioned near the proximal end 61.
Comme on peut l'observer, le tricot formant l'extenseur radial 6a présente plusieurs angles de mailles, par rapport à un axe longitudinal de l'extenseur radial 6a. As can be seen, the knit forming the radial expander 6a has several mesh angles, with respect to a longitudinal axis of the radial expander 6a.
La maille positionnée au niveau de l'extrémité proximale 61 présente un angle γ compris entre 95 et 110 degrés par rapport à un axe longitudinal de l'extenseur radial 6a. The mesh positioned at the proximal end 61 has an angle γ between 95 and 110 degrees with respect to a longitudinal axis of the radial expander 6a.
La maille positionnée en aval de la partie de retenue en tonneau 65 présente un angle β sensiblement égal à 75 degrés. Selon un autre mode de réalisation, présenté sur la figure 13, l'extenseur radial 6b comprend deux parties de retenues en tonneaux proximales 65, une portion intermédiaire 66 et deux parties de retenue en tonneaux distales 67. The mesh positioned downstream of the barrel retaining portion 65 has an angle β substantially equal to 75 degrees. According to another embodiment, shown in FIG. 13, the radial stent 6b comprises two proximal barrel retention portions 65, an intermediate portion 66 and two distal barrel retaining portions 67.
Les deux parties de retenue en tonneaux distales 67 sont destinées à être implantées dans le duodénum D à proximité d'un angle duodéno-jéjunal A. The two distal barrel retaining portions 67 are intended to be implanted in the duodenum D near a duodeno-jejunal angle A.
Le tricot formant l'extenseur radial 6b présente plusieurs angles de mailles, par rapport à un axe longitudinal de l'extenseur radial 6b. The knit forming the radial expander 6b has several mesh angles with respect to a longitudinal axis of the radial stent 6b.
La maille positionnée au niveau de l'extrémité proximale 61 présente un angle γ compris entre 95 et 110 degrés par rapport à un axe longitudinal de l'extenseur radial 6b. The mesh positioned at the proximal end 61 has an angle γ between 95 and 110 degrees with respect to a longitudinal axis of the radial expander 6b.
Les mailles, positionnées au niveau de la portion intermédiaire 66 et en aval de la partie de retenue en tonneau distale 67, présentent un angle β sensiblement égal à 75 degrés. The meshes, positioned at the intermediate portion 66 and downstream of the distal barrel retaining portion 67, have an angle β substantially equal to 75 degrees.
Selon un troisième mode de réalisation, présenté sur la figure 14, l'extenseur radial 6c comprend une partie de retenue en tonneau proximale 65, séparée de l'extrémité proximale 61 par une portion proximale 64. According to a third embodiment, shown in FIG. 14, the radial stent 6c comprises a proximal barrel retaining portion 65, separated from the proximal end 61 by a proximal portion 64.
La portion proximale 64 présente une géométrie tubulaire. The proximal portion 64 has a tubular geometry.
Comme on peut l'apprécier sur la figure 14, l'extenseur radial 6c présente au moins trois angles de mailles différents. As can be appreciated in Figure 14, the radial expander 6c has at least three different mesh angles.
La maille positionnée au niveau de l'extrémité proximale 61 présente un angle γ sensiblement égal à 101,7 degrés par rapport à un axe longitudinal de l'extenseur radial 6c. The mesh positioned at the proximal end 61 has an angle γ substantially equal to 101.7 degrees with respect to a longitudinal axis of the radial expander 6c.
La maille positionnée au niveau de la portion proximale 64 présente un angle γ' sensiblement égal à 42,25 degrés par rapport à un axe longitudinal de l'extenseur radial 6c. The mesh positioned at the proximal portion 64 has an angle γ 'substantially equal to 42.25 degrees with respect to a longitudinal axis of the radial expander 6c.
La maille, positionnée en aval de la partie de retenue en tonneau 65, présente un angle β sensiblement égal à 65,75 degrés. The mesh, positioned downstream of the barrel retaining portion 65, has an angle β substantially equal to 65.75 degrees.
La différence des angles de mailles γ, γ' et β est une disposition technique particulièrement avantageuse du troisième mode de réalisation ici présenté. The difference of the mesh angles γ, γ 'and β is a particularly advantageous technical arrangement of the third embodiment presented here.
En effet, tel que cela sera évoqué ci-après, la différence des trois angles de mailles γ, γ' et β, permet à l'extenseur radial 6c de maximiser le maintient du dispositif 1 dans un intestin grêle lors de l'exercice d'un effort longitudinal sur le dispositif 1. Indeed, as will be discussed below, the difference of the three mesh angles γ, γ 'and β, allows the radial expander 6c to maximize the holding of the device 1 in a small intestine during the exercise. a longitudinal force on the device 1.
Selon un autre mode de réalisation, présenté sur les figures 15 et 16, l'extenseur radial 6d comprend une partie de retenue sensiblement conique 68, séparée de l'extrémité proximale 61 par une portion proximale 64. L'extenseur radial 6d présente au moins trois angles de mailles différents.According to another embodiment, shown in FIGS. 15 and 16, the radial stent 6d comprises a substantially conical retaining portion 68, separated from the proximal end 61 by a proximal portion 64. The radial expander 6d has at least three different mesh angles.
La maille positionnée au niveau de l'extrémité proximale 61 présente un angle γ sensiblement égal à 103 degrés par rapport à un axe longitudinal de l'extenseur radial 6d. The mesh positioned at the proximal end 61 has an angle γ substantially equal to 103 degrees with respect to a longitudinal axis of the radial expander 6d.
La maille, positionnée sur la portion proximale 64 présente un angle γ' sensiblement égal à 29 degrés par rapport à un axe longitudinal de l'extenseur radial 6d. The mesh, positioned on the proximal portion 64 has an angle γ 'substantially equal to 29 degrees with respect to a longitudinal axis of the radial expander 6d.
La maille, positionnée en aval de la partie de retenue sensiblement conique 68, présente un angle β sensiblement égal à 78 degrés. The mesh, positioned downstream of the substantially conical retaining portion 68, has an angle β substantially equal to 78 degrees.
La différence des angles de mailles γ, γ' et β est une disposition technique particulièrement avantageuse du troisième mode de réalisation ici présenté. The difference of the mesh angles γ, γ 'and β is a particularly advantageous technical arrangement of the third embodiment presented here.
En effet, tel que cela sera évoqué ci-après, la différence des trois angles de maille γ, γ' et β, permet à l'extenseur radial 6d de maximiser le maintient du dispositif 1 dans un intestin grêle lors de l'exercice d'un effort longitudinal sur le dispositif 1. Indeed, as will be discussed below, the difference of the three mesh angles γ, γ 'and β, allows the radial expander 6d to maximize the holding of the device 1 in a small intestine during the exercise. a longitudinal force on the device 1.
L'assemblage du dispositif 1 est réalisé en chaussant la gaine 4 sur l'armature 2. The assembly of the device 1 is made by fitting the sheath 4 on the frame 2.
L'extrémité proximale 41 de la gaine 4 est superposée à l'extrémité proximale 21 de l'armature 2. The proximal end 41 of the sheath 4 is superimposed on the proximal end 21 of the frame 2.
Le premier lien 8 est ensuite introduit entre les mailles de l'armature 2. The first link 8 is then introduced between the stitches of the frame 2.
Si la gaine 4 présente des perçages 44, le lien 8 est aussi introduit dans les perçages 44. If the sheath 4 has holes 44, the link 8 is also introduced into the holes 44.
Selon ce mode de réalisation du dispositif 1, l'extenseur radial 6a ou 6b ou 6c ou 6d est engagé sur la gaine 4. L'extrémité proximale 61 de l'extenseur radial 6a ou 6b ou 6c ou 6d est superposée à l'extrémité proximale 41 de la gaine 4. According to this embodiment of the device 1, the radial expander 6a or 6b or 6c or 6d is engaged on the sheath 4. The proximal end 61 of the radial expander 6a or 6b or 6c or 6d is superimposed on the end proximal 41 of the sheath 4.
En référence à la figure 16, le premier lien 8 est ensuite introduit, entre les mailles de l'extenseur radial 6a ou 6b ou 6c ou 6d et de l'armature 2, dans les perçages 4, pour fixer l'assemblage du dispositif 1. With reference to FIG. 16, the first link 8 is then introduced between the meshes of the radial expander 6a or 6b or 6c or 6d and of the armature 2 into the holes 4, to fix the assembly of the device 1 .
L'armature 2, la gaine 4 et l'extenseur radial 6a ou 6b ou 6c ou 6d sont ainsi solidarisés par le premier lien 8. The armature 2, the sheath 4 and the radial expander 6a or 6b or 6c or 6d are thus secured by the first link 8.
L'extenseur radial 6a ou 6b ou 6c ou 6d vient alors en appui contre la paroi du duodénum D et assure la retenue du dispositif 1. The radial expander 6a or 6b or 6c or 6d then bears against the wall of the duodenum D and ensures the retention of the device 1.
En outre, selon le mode de réalisation choisi, la présence de parties de retenue en tonneaux 65-67 des extenseurs 6a-6b-6c-6d, ou d'une partie de retenue sensiblement conique 68, permet d'augmenter localement la pression de l'extenseur radial 6a ou 6b ou 6c ou 6d sur la paroi duodénale. De plus, selon le mode de réalisation choisi, l'angle des mailles de l'extenseur radial 6a ou 6b ou 6c ou 6d peut permettre de transformer des efforts axiaux, dus aux mouvements de l'intestin grêle, en efforts radiaux exercés par la partie de retenue en tonneau proximale 65, ou la partie de retenue sensiblement conique 68, sur la paroi duodénale. In addition, according to the embodiment chosen, the presence of barrel retaining portions 65-67 of the stents 6a-6b-6c-6d, or of a substantially conical retaining portion 68, makes it possible to locally increase the pressure of the radial expander 6a or 6b or 6c or 6d on the duodenal wall. In addition, according to the embodiment chosen, the angle of the stitches of the radial stent 6a or 6b or 6c or 6d can make it possible to transform axial forces, due to movements of the small intestine, into radial forces exerted by the proximal barrel retainer 65, or substantially conical retainer portion 68, on the duodenal wall.
De cette manière, le dispositif 1 est maintenu dans l'intestin grêle et résiste aux mouvements de l'intestin grêle. In this way, the device 1 is maintained in the small intestine and resists movement of the small intestine.
A titre d'exemple, la figure 16 présente la déformation de l'extenseur radial 6d sous la contrainte d'un effort de compression longitudinale. By way of example, FIG. 16 shows the deformation of the radial expander 6d under the stress of a longitudinal compressive force.
Comme on peut l'observer, l'angle γ' des mailles de la portion proximale 64 diminue la capacité de déformation de ces mailles sous l'exercice d'une compression longitudinale. As can be seen, the angle γ 'of the meshes of the proximal portion 64 decreases the deformation capacity of these meshes under the exercise of longitudinal compression.
Ainsi, les mailles de la portion proximale 64 ne peuvent que faiblement se déformer et transmettent l'effort à la partie de retenue sensiblement conique 68. Thus, the meshes of the proximal portion 64 can only weakly deform and transmit the force to the substantially conical retaining portion 68.
Les différences d'orientations et d'angulations des mailles, de la partie de retenue sensiblement conique 68 avec les mailles de la portion proximale 64, permettent de convertir un effort axial en effort radial, et permettent l'expansion de la partie de retenue sensiblement conique 68 lors de la transmission d'un effort par la portion proximale 64. The differences in orientations and angulations of the meshes, the substantially conical retaining portion 68 with the meshes of the proximal portion 64, make it possible to convert an axial force into a radial force, and allow the expansion of the retaining portion to be substantially conical 68 during the transmission of a force by the proximal portion 64.
Ainsi, d'une manière particulièrement avantageuse l'extenseur radial 6d peut utiliser les efforts exercés sur le dispositif 1 pour augmenter la tenue du dispositif 1 dans l'intestin grêle. Thus, in a particularly advantageous manner the radial expander 6d can use the forces exerted on the device 1 to increase the strength of the device 1 in the small intestine.
La fixation du dispositif 1 par l'extenseur 6a ou 6b ou 6c ou 6d permet au dispositif 1 d'être retiré de l'intestin grêle sans risque de blessures des tissus. Fixing the device 1 by the stent 6a or 6b or 6c or 6d allows the device 1 to be removed from the small intestine without risk of tissue injury.
La combinaison de l'armature 2 et de la gaine 4 permet de positionner le dispositif 1 dans la partie descendante d'un duodénum D, en aval de l'ampoule de Vater V. Un tel positionnement permet de conserver un maximum de fonctions biologiques de l'intestin grêle, ce qui permet une meilleure tolérance du dispositif par l'organisme du patient. The combination of the armature 2 and the sheath 4 makes it possible to position the device 1 in the descending part of a duodenum D, downstream of the Vater V bulb. Such a positioning makes it possible to preserve a maximum of biological functions of the small intestine, which allows a better tolerance of the device by the body of the patient.
Bien entendu, l'invention ne se limite pas aux seules formes d'exécution représentées ci-dessus, mais elle embrasse au contraire toutes les formes de réalisation. Of course, the invention is not limited to the embodiments shown above, but it embraces all the embodiments.
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR14/60221 | 2014-10-24 | ||
| FR1460221A FR3027511B1 (en) | 2014-10-24 | 2014-10-24 | IMPLANTABLE DEVICE FOR TREATING METABOLIC DISORDERS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2016062984A1 true WO2016062984A1 (en) | 2016-04-28 |
Family
ID=52450332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2015/052878 Ceased WO2016062984A1 (en) | 2014-10-24 | 2015-10-26 | Implantable device for the treatment of metabolic disorders |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR3027511B1 (en) |
| WO (1) | WO2016062984A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3063007A1 (en) * | 2017-02-17 | 2018-08-24 | Jean Michel Verd | IMPLANTABLE DEVICE FOR TREATING METABOLIC DISORDERS |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060161187A1 (en) * | 2005-01-19 | 2006-07-20 | Gi Dynamics, Inc. | Eversion resistant sleeves |
| US20080234834A1 (en) * | 2003-12-09 | 2008-09-25 | Gi Dynamics, Inc. | Gastrointestinal implant with drawstring |
| US20110040232A1 (en) * | 2008-04-23 | 2011-02-17 | Duo-Cure, Inc. | Duodenal liner device |
| EP2386275A1 (en) * | 2010-05-14 | 2011-11-16 | Taewoong Medical Co., Ltd. | Modular stent for implantation into the stomach |
| US20120158026A1 (en) * | 2009-12-18 | 2012-06-21 | Vysera Biomedical Limited | Gastrointestinal implant device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2485689B1 (en) * | 2009-10-09 | 2020-03-18 | Boston Scientific Scimed, Inc. | Stomach bypass |
| EP2621580A4 (en) * | 2010-10-01 | 2014-12-17 | Bfkw Llc | Intraluminal device and method |
-
2014
- 2014-10-24 FR FR1460221A patent/FR3027511B1/en not_active Expired - Fee Related
-
2015
- 2015-10-26 WO PCT/FR2015/052878 patent/WO2016062984A1/en not_active Ceased
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080234834A1 (en) * | 2003-12-09 | 2008-09-25 | Gi Dynamics, Inc. | Gastrointestinal implant with drawstring |
| US20060161187A1 (en) * | 2005-01-19 | 2006-07-20 | Gi Dynamics, Inc. | Eversion resistant sleeves |
| US20110040232A1 (en) * | 2008-04-23 | 2011-02-17 | Duo-Cure, Inc. | Duodenal liner device |
| US20120158026A1 (en) * | 2009-12-18 | 2012-06-21 | Vysera Biomedical Limited | Gastrointestinal implant device |
| EP2386275A1 (en) * | 2010-05-14 | 2011-11-16 | Taewoong Medical Co., Ltd. | Modular stent for implantation into the stomach |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3063007A1 (en) * | 2017-02-17 | 2018-08-24 | Jean Michel Verd | IMPLANTABLE DEVICE FOR TREATING METABOLIC DISORDERS |
Also Published As
| Publication number | Publication date |
|---|---|
| FR3027511B1 (en) | 2016-12-09 |
| FR3027511A1 (en) | 2016-04-29 |
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