CN112006812B - Tectorial membrane support post-sequence release device and tectorial membrane support conveying system - Google Patents
Tectorial membrane support post-sequence release device and tectorial membrane support conveying system Download PDFInfo
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- CN112006812B CN112006812B CN202010840187.1A CN202010840187A CN112006812B CN 112006812 B CN112006812 B CN 112006812B CN 202010840187 A CN202010840187 A CN 202010840187A CN 112006812 B CN112006812 B CN 112006812B
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- 210000002489 tectorial membrane Anatomy 0.000 title claims abstract description 12
- 230000009471 action Effects 0.000 claims abstract description 17
- 238000004146 energy storage Methods 0.000 claims description 53
- 230000000149 penetrating effect Effects 0.000 claims description 9
- 230000009467 reduction Effects 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 230000007423 decrease Effects 0.000 claims description 4
- 239000013013 elastic material Substances 0.000 claims description 2
- 210000003128 head Anatomy 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 238000009434 installation Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 208000002251 Dissecting Aneurysm Diseases 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 208000007474 aortic aneurysm Diseases 0.000 description 2
- 206010002895 aortic dissection Diseases 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 210000004204 blood vessel Anatomy 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000001356 surgical procedure Methods 0.000 description 2
- 230000002792 vascular Effects 0.000 description 2
- 231100000216 vascular lesion Toxicity 0.000 description 2
- 208000025494 Aortic disease Diseases 0.000 description 1
- 206010003210 Arteriosclerosis Diseases 0.000 description 1
- 208000024172 Cardiovascular disease Diseases 0.000 description 1
- 206010020772 Hypertension Diseases 0.000 description 1
- 208000011775 arteriosclerosis disease Diseases 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000003902 lesion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/04—Hollow or tubular parts of organs, e.g. bladders, tracheae, bronchi or bile ducts
- A61F2/06—Blood vessels
- A61F2/07—Stent-grafts
-
- 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
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
- A61F2/962—Instruments specially adapted for placement or removal of stents or stent-grafts having an outer sleeve
- A61F2/966—Instruments specially adapted for placement or removal of stents or stent-grafts having an outer sleeve with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod
-
- 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
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
- A61F2/962—Instruments specially adapted for placement or removal of stents or stent-grafts having an outer sleeve
- A61F2/97—Instruments specially adapted for placement or removal of stents or stent-grafts having an outer sleeve the outer sleeve being splittable
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Public Health (AREA)
- Transplantation (AREA)
- Cardiology (AREA)
- Veterinary Medicine (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Gastroenterology & Hepatology (AREA)
- Pulmonology (AREA)
- Media Introduction/Drainage Providing Device (AREA)
- Prostheses (AREA)
Abstract
The invention provides a post-release device of a covered stent and a covered stent conveying system, which relate to the field of medical equipment and comprise a limiting fork and a post-release limiting assembly, wherein the limiting fork comprises a fork seat and a plurality of fork rods, one ends of the fork rods are connected with the radial circumferential surface of the fork seat in a pair-by-pair mode, the other ends of the fork rods penetrate through stent rings at the proximal end of the covered stent in a one-to-one correspondence mode under a limiting working condition and are fixed on the post-release limiting assembly, the fork seat drives the fork rods to move towards the distal end direction of the post-release limiting assembly to further release the proximal end of the covered stent under a release working condition, the post-release limiting assembly is configured to be matched with the limiting fork so that the action of releasing the proximal end of the covered stent by the limiting fork occurs after the action of releasing the proximal end of the covered stent by an outer tube, and operating holes through which guide wires can pass are formed in the fork seat and the post-release limiting assembly. The invention solves the problem that the existing tectorial membrane stent conveying system can not ensure that the tectorial membrane stent is released in sequence once and twice.
Description
Technical Field
The invention relates to the technical field of medical equipment, in particular to a release device for a covered stent after sequence and a covered stent conveying system.
Background
Aortic diseases are a group of cardiovascular diseases which seriously threaten human health, including aortic dissection, aortic aneurysm and the like, are mainly caused by hypertension, arteriosclerosis, injury, infection and the like, and are extremely threatening to the life of patients, and the traditional operation mode is to introduce extracorporeal circulation to perform open operation, and perform artificial vascular replacement on the injured part, but the open operation has long time, large operation wound and extremely high death rate.
In recent years, minimally invasive intervention is popular for vascular affected parts of patients, and a special conveying system is used for releasing a covered stent to a vascular lesion position to repair aortic dissection and aortic aneurysm vessels, so that the lesion vessels are protected from being broken, and death is caused.
The method comprises the steps of firstly loading the covered stent into a conveying system before releasing, then slowly opening the covered stent through a release outer tube, wherein the release is one-time release, after the one-time release is finished, the bare stent at the end part of the covered stent is in a locking state, finally, the bare stent part of the covered stent is released in a secondary release mode, the final covered stent is completely released, the conveying system is safely withdrawn from a human body, a blood vessel is not damaged in the withdrawal process, the sequence of the one-time release and the secondary release is critical in the whole release process, once the wrong sequential release occurs, two results can occur, if the wrong release occurs outside a patient, the covered stent and the conveyor are separated at the bare stent part and cannot be reused, and if the wrong release occurs inside the patient, the covered stent cannot be accurately positioned, and the operation completely fails. And in severe cases, the life of the patient is endangered.
At present, the sequence of the primary release and the secondary release of the covered stent by the conveyor in the covered stent conveying system cannot be completely ensured, the technical requirements on doctors are high, and the operation difficulty and the operation success rate are high.
Disclosure of Invention
The invention aims to provide a device for releasing a stent graft after the sequence and a stent graft conveying system, so as to solve the technical problems that in the stent graft conveying system in the prior art, the sequence of primary release and secondary release of the stent graft by a conveyor cannot be completely ensured, the technical requirements on doctors are high, and the surgical difficulty and the surgical success rate are low.
In order to achieve the above purpose, the embodiment of the present invention adopts the following technical scheme:
In a first aspect, an embodiment of the present invention provides a sequential post-release device for a stent graft, which is applied to a stent graft conveyor with an outer tube, and includes a limiting fork and a post-release limiting assembly;
The limiting fork comprises a fork seat and a plurality of fork rods, wherein one ends of the fork rods are connected to the radial circumferential surface of the fork seat at intervals, and the limiting fork is configured to be fixed on the rear release limiting assembly after penetrating through a plurality of support rings arranged at the proximal end of a film covered support in a one-to-one correspondence manner under a limiting working condition so as to fold the proximal end of the film covered support in the rear release limiting assembly, and the fork seat drives the fork rods to move towards the distal end direction of the rear release limiting assembly under a release working condition so as to enable the fork rods to be separated from the support rings and further release the proximal end of the film covered support;
the rear release limiting assembly is configured to be capable of cooperating with the limiting fork so that the action of releasing the proximal end of the stent graft by the limiting fork occurs after the action of releasing the proximal end of the stent graft by the outer tube;
and the fork seat and the rear release limiting assembly are respectively provided with an operation hole through which a guide wire can pass.
In an optional embodiment, a fork rod limiting groove is formed in one end, far away from the fork seat, of each fork rod, and a notch of the fork rod limiting groove extends to opposite faces, facing each other, of two adjacent fork rods;
the rear release limiting assembly comprises a limiting rod and a fixing seat;
The limiting rod comprises a rod body and two limiting wings, wherein the proximal ends of the two limiting wings are symmetrically connected to two sides of the proximal end of the rod body, and the distal ends of the two limiting wings extend towards the distal end direction of the rod body and are opened towards the direction away from the rod body;
the fixing seat comprises a columnar body, one end of the columnar body in the axial direction is the proximal end of the columnar body, the other end of the columnar body in the axial direction is the distal end of the columnar body, the direction extending from the proximal end of the columnar body towards the distal end of the columnar body is taken as a first direction, and the direction extending from the distal end of the columnar body towards the proximal end of the columnar body is taken as a second direction:
the columnar body comprises a first diameter-reducing section, a second diameter-reducing section and a third diameter-reducing section, wherein the diameter of the first diameter-reducing section is reduced along a circumscribed circle of a section which is cut in a direction perpendicular to the first direction; the radial outer peripheral surface of the first diameter reduction section comprises a plurality of limiting units, each limiting unit comprises a fork rod groove and a limiting wing groove which are adjacent to each other, the opening of the fork rod groove and the opening of the limiting wing groove face the far end of the columnar body, and the limiting wing groove is formed in a shape that the opening gradually decreases in the second direction;
The limiting rods comprise a plurality of limiting wing grooves which are in one-to-one correspondence, a rod body limiting part is arranged on the radial outer circumferential surface of the columnar body, in each limiting rod, the rod body penetrates through the rod body limiting part, and the proximal ends of the two limiting wings are inserted into and extruded into the corresponding limiting wing grooves;
Under the limiting working condition, the working condition that a plurality of fork rods of the limiting fork are inserted into a plurality of fork rod grooves in a one-to-one correspondence mode is taken as a first working condition, in the first state of the first working condition, the distal ends of all the limiting wings are respectively inserted into fork rod limiting grooves of the adjacent fork rods, the distal ends of rod bodies extend to the distal ends of columnar bodies, in the second state of the first working condition, the limiting rods slide along the second direction under the action of external force so as to enable the distal ends of all the limiting wings to be continuously extruded by the corresponding limiting wing grooves to be close to the rod bodies, and further enable the distal ends of all the limiting wings to be respectively separated from the corresponding fork rod limiting grooves.
In an alternative embodiment, the rear release stop assembly further comprises an elastic energy storage member;
The elastic energy storage pieces comprise a plurality of limiting wing grooves which are arranged in a one-to-one correspondence manner, and the distal ends of the elastic energy storage pieces are respectively connected or abutted with the proximal ends of rod bodies of the limiting rods inserted into the corresponding limiting wing grooves;
and in a second state of the first working condition, the limiting rod slides along the second direction to compress or release the elastic energy storage piece.
In an alternative embodiment, the elastic energy storage piece adopts a spring, in a first state of the first working condition, the elastic energy storage piece is in an incompletely compressed state, in a second state of the first working condition, the elastic energy storage piece is continuously compressed, or in a first state of the first working condition, the elastic energy storage piece is in a free state, and in a second state of the first working condition, the elastic energy storage piece is compressed.
In the first working condition, the elastic energy storage piece is in a stretching state, and in each limiting rod, the sum of component forces of friction force, received by two limiting wings, of the wall surfaces of the limiting wing grooves in the first direction is larger than elastic restoring force of the corresponding elastic energy storage piece acting on the two limiting wings in the second direction.
In an optional embodiment, the columnar body further includes a second reduced diameter section formed by reducing a diameter of a circumscribed circle of a cross section cut perpendicular to the first direction, and the rod body limiting portion is located between the first reduced diameter section and the second reduced diameter section.
In an alternative embodiment, the rod limiting part comprises a plurality of rod limiting blocks;
The plurality of rod body limiting blocks are distributed on the radial outer circumferential surface of the part, close to the first diameter reduction section, of the far end of the columnar body at intervals, guide holes are formed in the plurality of rod body limiting blocks, and the plurality of guide holes are in one-to-one correspondence with the plurality of limiting wing grooves;
in each limiting rod, the rod body passes through the corresponding guide hole on the rod body limiting block.
In an alternative embodiment, the opening area of the space on the radial outer peripheral surface of the columnar body gradually decreases from the inside of the columnar body to the outside of the columnar body in the radial direction of the columnar body.
In an alternative embodiment, in the limiting rod, the rod body comprises a main rod body and a guide rod body, wherein the distal end of the guide rod body is connected to the proximal end of the main rod body, and the diameter of a circumcircle of a cross section cut along the radial direction of the guide rod body is smaller than that of a circumcircle of a cross section cut along the radial direction of the main rod body;
The distal end of the elastic energy storage piece is sleeved on the guide rod body, and the distal end face of the elastic energy storage piece is abutted to the proximal end face of the main rod body.
In an alternative embodiment, a mounting blind hole is further formed in the portion, connected to the proximal end face of the limit wing groove, of the columnar body, the mounting blind hole is communicated with the limit wing groove, and the guide rod body and the elastic energy storage piece are inserted into the mounting blind hole.
In an alternative embodiment, the fork rod limiting groove penetrates through the fork rod along the radial circumferential direction of the fork seat on each fork rod of the limiting fork.
In an alternative embodiment, the fork rod limiting groove is formed by recessing a side surface of the fork rod facing the columnar body towards a direction away from the columnar body.
In an alternative embodiment, a plurality of hooking protrusions are arranged on the outer circumferential surface of the distal end of the columnar body, the hooking protrusions are distributed in pairs along the radial outer circumferential surface of the columnar body at intervals, and are used for hooking a plurality of support rings arranged at the proximal end of the stent graft, and a support ring limiting groove is formed between two adjacent hooking protrusions.
In an alternative embodiment, the opening area of the fork rod groove on the radial outer circumferential surface of the columnar body and the opening area of the limit wing groove on the radial outer circumferential surface of the columnar body are gradually reduced from the inside of the columnar body to the outside of the columnar body along the radial direction of the columnar body.
In a second aspect, an embodiment of the present invention provides a stent graft delivery system, comprising a control handle, a guidewire tube, an inner tube, an outer tube, and a stent graft sequential post-release device according to any of the preceding embodiments;
The guide wire tube is used for penetrating through the guide wire, the guide wire tube penetrates through the inner tube, the proximal end of the guide wire tube is inserted into and fixed in the operation hole of the rear release limiting assembly, the proximal end of the inner tube is fixed in the operation hole on the fork seat, the distal end of the outer tube and the distal end of the inner tube are connected to the control handle, and the control handle is configured to drive the outer tube and the inner tube to move back and forth.
The embodiment of the invention can realize the following beneficial effects:
A first aspect of embodiments of the present invention provides a sequential post-release device for a stent graft, for a stent graft conveyor with an outer tube, comprising a stop fork and a post-release stop assembly. The limiting fork comprises a fork seat and a plurality of fork rods, one ends of the fork rods are connected to the radial circumferential surface of the fork seat at intervals, the limiting fork is configured to be capable of penetrating through a plurality of support rings arranged at the proximal end of the film covered support in a one-to-one correspondence mode under a limiting working condition and then being fixed to a rear release limiting assembly so as to fold the proximal end of the film covered support in the rear release limiting assembly, the fork seat drives the plurality of fork rods to move towards the distal end direction of the rear release limiting assembly under the release working condition so as to enable the fork rods to be separated from the support rings and further release the proximal end of the film covered support, the rear release limiting assembly is configured to be matched with the limiting fork so that the action that the proximal end of the film covered support is released by the limiting fork occurs after the action that the proximal end of the film covered support is released by the outer tube, and operation holes capable of being passed by guide wires are formed in the fork seat and the rear release limiting assembly.
In the release device behind tectorial membrane support order that this embodiment provided, through setting up spacing fork and back release spacing subassembly to make back release spacing subassembly and spacing fork mutually support, so that the action that the proximal end of tectorial membrane support was released by spacing fork takes place after the action of the proximal end of outer tube release tectorial membrane support, thereby, can ensure that tectorial membrane support conveyer carries out the release once to the tectorial membrane support and carries out the secondary release again, promptly, guarantees the order release of once release and secondary release, reduces the operation risk, improves the operation success rate.
In addition, the embodiment of the invention also provides a covered stent conveying system, which comprises a control handle, a wire guide tube, an inner tube, an outer tube and the covered stent sequential rear release device provided by the first aspect, wherein the wire guide tube is used for penetrating through the wire guide, the wire guide tube penetrates through the inner tube, the proximal end of the wire guide tube is inserted into and fixed in an operation hole of the rear release limiting assembly, the proximal end of the inner tube is fixed in an operation hole on a fork seat, the distal end of the outer tube and the distal end of the inner tube are connected to the control handle, and the control handle is configured to drive the outer tube and the inner tube to move forwards and backwards.
Because the stent graft delivery system provided in this embodiment includes the stent graft sequential release device provided in the first aspect, the stent graft delivery system provided in this embodiment can achieve all the beneficial effects that the stent graft sequential release device provided in the first aspect can achieve.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the overall structure of the connection between a release device and a stent graft after the stent graft is sequenced according to the embodiment of the present invention;
FIG. 2 is an enlarged view of a part of the structure of the portion A in FIG. 1;
FIG. 3 is a schematic view of the overall structure of an alternative embodiment of the stop fork according to the present invention;
FIG. 4 is a schematic view of the overall structure of an alternative embodiment of the stop fork according to the present invention;
FIG. 5 is a schematic view of the overall structure of the columnar body of the fixing seat in the rear release limiting assembly;
FIG. 6 is a schematic view showing the overall structure of the columnar body of the fixing seat in the rear release limiting assembly at another view angle;
FIG. 7 is a cross-sectional view taken along A-A of FIG. 6;
FIG. 8 is a schematic view of the overall structure of the stop lever in the rear release stop assembly;
FIG. 9 is a schematic view of the overall structure of the rear release stop assembly at an angle in accordance with an embodiment of the present invention;
FIG. 10 is a schematic view of the overall structure of the rear release stop assembly at another angle in accordance with an embodiment of the present invention;
FIG. 11 is a B-B cross-sectional view of FIG. 10;
FIG. 12 is an assembly view of a stent graft delivery system according to an embodiment of the present invention between a sequential post-stent delivery device and an inner tube, a post-anchor and a guidewire tube;
fig. 13 is an exploded view of the assembly of a stent graft delivery system according to an embodiment of the present invention between a sequential post-stent delivery device and an inner tube, an outer tube, a post-anchor, and a guidewire tube.
The icons are 1-limit fork, 11-fork seat, 12-fork rod, 120-fork rod limit groove, 2-rear release limit component, 21-limit rod, 211-rod body, 2111-main rod body, 2112-guide rod body, 2113-rod seat, 212-limit wing, 22-fixed seat, 220-columnar body, 2201-first diameter reduction section, 20-limit unit, 201-fork rod groove, 202-limit wing groove, 203-installation blind hole, 204-hook protrusion, 2040-bracket ring limit groove, 221-rod body limit part, 2210-guide hole, 2202-second diameter reduction section, 23-elastic energy storage piece, 100-fork seat installation hole, 200-fixed seat installation hole, 300-covered film bracket, 310-bracket ring, 4-guide head, 401-first connecting hole, 402-second connecting hole, 5-guide wire pipe, 6-inner pipe, 7-outer pipe, 8-welding pipe and 9-rear fixer.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "far", "near", "inner", "outer", "axial", "radial", etc., are based on directions or positional relationships shown in the drawings, or directions or positional relationships in which the inventive product is conventionally put in use, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediate medium, or in communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Some embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.
Example 1
The present embodiment provides a post-stent-graft release device, which is applied to a stent-graft conveyor with an outer tube 7, and includes a limiting fork 1 and a post-release limiting assembly 2, referring to fig. 1 and 2.
The spacing fork 1 comprises a fork seat 11 and a plurality of fork rods 12, wherein one ends of the fork rods 12 are connected to the radial circumferential surface of the fork seat 11 at intervals, the spacing fork 1 is configured to be capable of penetrating through a plurality of bracket rings 310 arranged at the proximal end of the covered stent 300 in a one-to-one correspondence manner and then being fixed to the rear release limiting assembly 2 so as to fold the proximal end of the covered stent 300 in the rear release limiting assembly 2, and the fork seat 11 drives the plurality of fork rods 12 to move towards the distal end direction of the rear release limiting assembly 2 under the release working condition so as to enable the fork rods 12 to be separated from the bracket rings 310 and further release the proximal end of the covered stent 300. The rear release stop assembly 2 is configured to cooperate with the stop fork 1 such that the release of the proximal end of the stent graft 300 by the stop fork 1 occurs after the release of the proximal end of the stent graft 300 by the outer tube 7. The fork seat 11 and the rear release limiting component 2 are provided with operation holes through which the guide wires can pass.
In this embodiment, the proximal end refers to an end of the medical device, which is close to a blood vessel of a patient when the medical device works, the distal end refers to an end of the medical device, which is close to a doctor, and the plurality of stent rings 310 disposed at the proximal end of the stent graft 300 may be formed by directly bending a metal framework of the stent graft 300, or the stent rings 310 may be separately disposed, and the stent rings 310 may be connected to the proximal end of the metal framework of the stent graft 300.
The usage mode of the release device after the sequence of the covered stent provided by the embodiment is as follows:
First, the stent graft 300 is mounted on the stent graft delivery system, specifically, as shown in fig. 12 and 13, the stent graft 300 is compressed in the outer tube 7 of the delivery device, the rear anchor 9 fixes the rear end of the stent graft 300 from the inside of the outer tube 7, the inner tube 6 is screwed or welded or interference fit or otherwise fixedly connected to the operation hole of the fork seat 11, the proximal end of the wire guide tube 5 is fixedly connected to the operation hole of the rear release limiting assembly 2, and the fixing manner is various, for example, but not limited to, as shown in fig. 13, the welding tube 8 is connected to the proximal end of the wire guide tube 5, the welding tube 8 is welded to the operation hole of the rear release limiting assembly 2, or a connecting thread is provided on the wall of the operation hole of the rear release limiting assembly 2, and the proximal end of the wire guide tube 5 is screwed into the operation hole of the rear release limiting assembly 2;
Secondly, under the limiting working condition, referring to fig. 1 to 13, one ends of the fork rods 12 of the limiting fork 1, which are far away from the fork seat 11, correspondingly penetrate through a plurality of bracket rings 310 arranged at the proximal end of the covered stent 300 one by one, and then are fixed on the rear release limiting assembly 2, and at the moment, the proximal end of the covered stent 300 is restrained by the limiting fork 1 and is folded on the rear release limiting assembly 2;
third, the guide wire is passed through the guide wire tube 5, and the stent graft loaded with the stent graft 300 is sequentially and then delivered to the vascular lesion site of the patient by a delivery device along the percutaneous puncture of the guide wire;
Fourth, the outer tube 7 is retracted by utilizing the control handle of the covered stent conveyer, so that the covered stent 300 is released from the outer tube 7, and the covered stent 300 is released once;
fifthly, under the release working condition, the fork seat 11 drives the fork rods 12 to move towards the distal end direction of the rear release limiting assembly 2, so that the fork rods 12 are separated from the bracket ring 310, and the proximal end of the covered stent 300 is released for the second time, and therefore, the covered stent 300 is released completely;
and sixth, withdrawing the whole covered stent conveyer and the guide wire.
In this embodiment, by setting the limiting fork 1 and the rear release limiting assembly 2, and making the rear release limiting assembly 2 and the limiting fork 1 mutually cooperate, the action of releasing the proximal end of the stent graft 300 by the limiting fork 1 occurs after the action of releasing the proximal end of the stent graft 300 by the outer tube 7, thereby ensuring that the stent graft conveyor releases the stent graft 300 once and then releases it secondarily, that is, ensuring the sequential release of the primary release and the secondary release, reducing the risk of surgery and improving the success rate of surgery.
With continued reference to fig. 1 to 13, in an alternative implementation manner of the present embodiment, preferably, a fork lever limiting groove 120 is formed at one end of each fork lever 12 far away from the fork seat 11, and a notch of the fork lever limiting groove 120 extends to opposite surfaces of two adjacent fork levers 12 facing each other;
The rear release limiting assembly 2 comprises a limiting rod 21 and a fixing seat 22, wherein the limiting rod 21 comprises a rod body 211 and two limiting wings 212, the proximal ends of the two limiting wings 212 are symmetrically connected to two sides of the proximal end of the rod body 211, the distal ends of the two limiting wings 212 extend towards the distal end direction of the rod body 211 and are opened towards the direction away from the rod body 211, and the two limiting wings 212 are made of elastic materials or the two limiting wings 212 are respectively connected to the rod body 211 through torsion springs. The fixing base 22 includes a cylindrical body 220, one end of the cylindrical body 220 in the axial direction is a proximal end of the cylindrical body 220, the other end of the cylindrical body 220 in the axial direction is a distal end of the cylindrical body 220, a direction extending from the proximal end of the cylindrical body 220 towards the distal end of the cylindrical body 220 is a first direction, and a direction extending from the distal end of the cylindrical body 220 towards the proximal end of the cylindrical body 220 is a second direction, the cylindrical body 220 includes a first reduced diameter section 2201 formed by reducing a circumscribed circle diameter of a cross section cut perpendicular to the first direction in the first direction, a plurality of limiting units 20 are included on a radial outer circumferential surface of the first reduced diameter section 2201, each limiting unit 20 includes a fork rod groove 201 and a limiting wing groove 202 which are adjacent to each other, an opening of the fork rod groove 201 and an opening of the limiting wing groove 202 are both oriented towards the distal end of the cylindrical body 220, and the limiting wing groove 202 is formed into a shape with an opening gradually reduced in the second direction. The limiting rods 21 comprise a plurality of limiting wing grooves 202 which are in one-to-one correspondence, a rod body limiting part 221 is arranged on the radial outer circumferential surface of the columnar body 220, in each limiting rod 21, the rod body 211 passes through the rod body limiting part 221, and the proximal ends of the two limiting wings 212 are inserted into and extruded into the corresponding limiting wing grooves 202;
Under the above-mentioned limit working conditions, the working conditions that the plurality of fork rods 12 of the limit fork 1 are inserted into the plurality of fork rod grooves 201 in a one-to-one correspondence manner are taken as the first working condition, in the first state of the first working condition, the distal ends of the limit wings 212 in each limit rod 21 are respectively inserted into the fork rod limit grooves 120 of the adjacent fork rods 12, the distal ends of the rod bodies 211 extend to the distal ends of the columnar bodies 220, preferably, the rod bodies 211 of the limit rods 21 comprise a main rod body 2111 and a rod seat 2113 connected to the distal ends of the main rod body 2111, the rod seat 2113 is positioned at the distal ends of the columnar bodies 220, and in the second state of the first working condition, the limit rods 21 slide along the second direction under the action of external force, so that in each limit rod 21, the distal ends of the two limit wings 212 are continuously extruded by the corresponding limit wing grooves 202 to be close towards the rod bodies 211, and the distal ends of the limit wings 212 are respectively separated from the corresponding fork rod limit grooves 120;
a fork mount hole 100 penetrating the fork 11 in a direction extending from the proximal end of the fork lever 12 to the distal end of the fork lever 12 is formed in the fork 11 as an operation hole of the fork 11, and a holder mount hole 200 penetrating the column body 220 in a first direction is formed in the middle of the holder 22 as an operation hole of the rear release limiting assembly 2.
The mode of use of the post-stent-graft release device provided in this preferred embodiment is as follows:
the first step is the same as the first step;
In the second step, referring to fig. 1 to 13, after one end of the plurality of fork rods 12 of the limiting fork 1, which is far away from the fork seat 11, passes through the plurality of support rings 310 arranged at the proximal end of the covered support 300 in a one-to-one correspondence manner, and then is inserted into the plurality of fork rod grooves 201, and in each limiting rod 21, the distal end of each limiting wing 212 is respectively inserted into the fork rod limiting groove 120 of the fork rod 12 adjacent to the limiting wing 212, so that one end of the plurality of fork rods 12 of the limiting fork 1, which is far away from the fork seat 11, is fixed to the rear release limiting assembly 2, at this time, the distal end of the rod body 211 extends to the distal end of the columnar body 220, and thus, the support ring 310 arranged on the covered support 300 is limited between the distal end of the rod body 211 of the limiting rod 21 and the distal end peripheral surface of the columnar body 220, and the support ring 310 of the covered support 300 is contacted with the distal end of the rod 211 of the limiting rod 21;
The third step is the same as the previous third step;
Fourth, the outer tube 7 is retracted by using the control handle of the stent graft conveyor, so that the stent graft 300 is released from the outer tube 7, and the stent graft 300 is released once, in the releasing process, when the outer tube 7 releases the stent ring 310 of the stent graft 300, the stent ring 310 at the proximal end of the stent graft 300 loses the constraint of the outer tube 7 and bounces off, in the bouncing process, the stent ring 310 generates a thrust force towards the proximal end direction of the columnar body 220 on the rod body 211 of the stop lever 21, namely the external force, at this time, the rod body 21 is converted into a second state of the first working condition, and slides along the second direction under the action of the external force, and as the stop lever 21 slides along the second direction, the distal ends of the two stop levers 212 are continuously pressed by the corresponding stop lever grooves 202 to approach the rod body 211, so that the distal ends of the stop levers 212 are respectively separated from the corresponding fork lever stop grooves 120;
The fifth and sixth steps are the same as the fifth and sixth steps described above.
In a further preferred implementation manner of this embodiment, the rear release limiting assembly 2 further includes an elastic energy storage member 23, where the elastic energy storage member 23 includes a plurality of limiting wing grooves 202, and distal ends of the elastic energy storage members 23 are respectively connected to or abutted against proximal ends of rod bodies 211 of the limiting rods 21 inserted into the corresponding limiting wing grooves 202, and in a first state of the first working condition, the elastic energy storage member 23 is in a free or energy storage state, and in a second state of the first working condition, the limiting rods 21 slide along a second direction to compress or release the elastic energy storage member 23.
Specifically, alternatively, the elastic energy storage member 23 is a spring, the elastic energy storage member 23 is in an incompletely compressed state in a first state of the first working condition, and the elastic energy storage member 23 is continuously compressed in a second state of the first working condition, or alternatively, the elastic energy storage member 23 is in a free state in the first state of the first working condition, and the elastic energy storage member 23 is compressed in the second state of the first working condition, or alternatively, the elastic energy storage member 23 is in a spring, and in the first state of the first working condition, the elastic energy storage member 23 is in a stretched state, and in each limit rod 21, the sum of friction forces on the wall surfaces of the limit wing grooves 202 received by the two limit wings 212 is larger than the component force of the corresponding elastic energy storage member 23 acting on the elastic restoring forces of the two limit wings 212 in the second direction. Preferably, the elastic energy storage member 23 is a spring, in the first state of the first working condition, the elastic energy storage member 23 is in an incompletely compressed state, and in the second state of the first working condition, the elastic energy storage member 23 is continuously compressed, so that in the first state of the first working condition, the distal ends of the limiting wings 212 are inserted into the fork rod limiting grooves 120 of the fork rods 12 adjacent to the limiting wings 212 under the action of the elastic energy storage member 23, and the connection reliability of the rear release limiting assembly 2 is ensured, wherein the connection reliability of the ends, far from the fork seats 11, of the plurality of fork rods 12 of the limiting fork 1 is ensured.
In addition to any of the above optional embodiments of the present embodiment, it is preferable that the cylindrical body 220 further includes a second reduced diameter section 2202 formed by reducing a diameter of an external circle of a cross section cut perpendicular to the first direction, and the rod limiting portion 221 is located between the first reduced diameter section 2201 and the second reduced diameter section 2202, thereby increasing a connection stability of the proximal end of the stent graft 300 sleeved on the distal end of the cylindrical body 220.
In addition, as shown in fig. 1, 5, 6, 7, 9, and 10, it is preferable that the rod limiting portion 221 includes a plurality of rod limiting blocks, the plurality of rod limiting blocks are distributed on the outer radial circumference of the portion of the distal end of the columnar body 220 near the first reducing section 2201 at intervals, the plurality of rod limiting blocks are each provided with a guiding hole 2210, the plurality of guiding holes 2210 are in one-to-one correspondence with the plurality of limiting wing grooves 202, an interval for passing through the fork rod 12 is formed between every two adjacent rod limiting blocks, the interval corresponds to the fork rod groove 201 one-to-one, the rod 211 passes through the guiding hole 2210 on the corresponding rod limiting block in each limiting rod 21, and of course, the rod limiting portion 221 may also be an elastic ring structure sleeved outside the columnar non-lifting 220, and a groove or the like for limiting and guiding the rod 211 of the limiting rod 21 is provided on the inner ring surface of the elastic ring structure.
Further preferably, the opening areas of the fork rod grooves 201 on the radial outer circumferential surface of the columnar body 220 are gradually reduced from the inside of the columnar body 220 to the outside of the columnar body 220 along the radial direction of the columnar body 220, so that a good limit guiding effect can be achieved on the fork rod 12.
Further, referring to fig. 8, 10 and 11, in any of the above alternative embodiments of the present embodiment, it is preferable that in the stopper rod 21, the rod body 211 includes a main rod body 2111 and a guide rod body 2112, a distal end of the guide rod body 2112 is connected to a proximal end of the main rod body 2111, a circumscribed circle diameter of a cross section cut along a radial direction of the guide rod body 2112 is smaller than a circumscribed circle diameter of a cross section cut along a radial direction of the main rod body 2111, a distal end of the elastic energy storage member 23 is sleeved on the guide rod body 2112, and a distal end face of the elastic energy storage member 23 abuts against a proximal end face of the main rod body 2111.
Further preferably, a mounting blind hole 203 is further formed in the portion of the columnar body 220 connected to the proximal end face of the limit wing groove 202, the mounting blind hole is communicated with the limit wing groove 202, and the guide rod body 2112 and the elastic energy storage member 23 are inserted into the mounting blind hole 203.
In addition, referring to fig. 3, in an alternative structure of the spacing fork 1 of the present embodiment, the fork rod limiting grooves 120 penetrate through the fork rod 12 along the radial circumferential direction of the fork seat 11 on each fork rod 12 of the spacing fork 1, and referring to fig. 4, in an alternative structure of the spacing fork 1 of the present embodiment, the fork rod limiting grooves 120 are formed by recessing a side surface of the fork rod 12 facing the columnar body 220 toward a direction facing away from the columnar body 220.
In addition, referring to fig. 5, in addition to any of the above-mentioned alternative embodiments of the present embodiment, it is preferable that a plurality of hooking protrusions 204 are provided on the outer circumferential surface of the distal end of the columnar body 220, the plurality of hooking protrusions 204 are distributed in pairs along the radial outer circumferential surface of the columnar body 220 at intervals, for hooking a plurality of stent rings 310 provided on the proximal end of the stent graft 300, and a stent ring limiting groove 2040 is formed between two adjacent hooking protrusions 204.
In addition, in any of the above alternative embodiments of the present embodiment, it is preferable that the opening area of the fork arm groove 201 on the radial outer peripheral surface of the columnar body 220 and the opening area of the stopper wing groove 202 on the radial outer peripheral surface of the columnar body 220 are gradually reduced from the inside of the columnar body 220 to the outside of the columnar body 220 in the radial direction of the columnar body 220.
In addition, as shown in fig. 1, 12 and 13, the fixing base 22 further includes a guide head 4, the distal end of the guide head 4 is connected to the proximal end of the columnar body 220, the fixing base mounting hole 200 extends to penetrate the guide head 4, the guide head 4 and the columnar body 220 may be in an integrally formed structure, or as shown in fig. 7, 9 and 13, a first connecting hole 401 is formed on the proximal end surface of the columnar body 220, a second connecting hole 402 is formed on the distal end surface of the guide head 4, and the guide head 4 and the columnar body 220 are connected by connecting a plug rod in the first connecting hole 401 or the second connecting hole 402 on the columnar body 220, and the plug rod may be in interference fit or otherwise fixed to the first connecting hole 401 and the second connecting hole 402. The damage of the fixing seat 22 to the vessel wall is reduced.
In addition, in order to provide release accuracy of the stent graft 300 during the operation, in each alternative implementation manner of this embodiment, preferably, X-ray developing objects may be connected to the plurality of prongs 12 of the limiting fork 1, so that the secondary release time and the secondary release position of the stent graft 300 during the release process can be known more accurately under the X-rays, and the operation accuracy is improved.
Example two
The present embodiment provides a stent graft delivery system comprising a control handle, a guidewire tube 5, an inner tube 6, an outer tube 7, and a stent graft sequential post-release device provided by any of the alternative embodiments of the embodiment. The guide wire tube 5 is used for penetrating through a guide wire, the guide wire tube 5 penetrates through the inner tube 6, the proximal end of the guide wire tube 5 is inserted into and fixed in an operation hole of the rear release limiting assembly 2, the proximal end of the inner tube 6 is fixed in an operation hole on the fork seat 11, the distal end of the outer tube 7 and the distal end of the inner tube 6 are connected to a control handle, and the control handle is configured to drive the outer tube 7 and the inner tube 6 to move forwards and backwards.
Because the stent graft delivery system provided in this embodiment includes the stent graft post-sequence release device described in embodiment one, the stent graft delivery system provided in this embodiment can achieve all the advantages that the stent graft post-sequence release device can achieve in embodiment one, and the specific structure and the effects that can be achieved can be obtained with reference to each optional or preferred implementation mode in embodiment one. In each alternative implementation of this embodiment, as shown in fig. 12 and 13, preferably, the stent graft delivery system further includes a rear holder 9, the rear holder 9 is disposed in the outer tube 7, the inner tube 6 passes through the rear holder 9, and a distal end of the rear holder 9 is connected to a control handle, and the control handle is further configured to drive the rear holder 9 to move back and forth in the outer tube 7, so that a front end of the rear holder 9 abuts against or releases a rear end of the stent graft 300, thereby increasing stability of the stent graft 300 during delivery.
Finally, it should be noted that, in the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in terms of differences from other embodiments, and identical and similar parts of each embodiment are mutually referred to, so that the above embodiments in the present specification are only used for illustrating the technical solutions of the present invention, but not limiting the same, and although the present invention is described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions described in the foregoing embodiments may be modified or some or all of the technical features may be equivalently replaced, and these modifications or substitutions do not depart from the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.
Claims (14)
1. The sequential rear release device of the covered stent is applied to a covered stent conveyor with an outer tube (7) and is characterized by comprising a limiting fork (1) and a rear release limiting assembly (2);
The limiting fork (1) comprises a fork seat (11) and a plurality of fork rods (12), wherein one ends of the fork rods (12) are connected to the radial circumferential surface of the fork seat (11) in a pairwise and spaced manner, the limiting fork (1) is configured to enable the fork rods (12) to be separated from a plurality of bracket rings (310) arranged at the proximal end of a film covered bracket (300) in a one-to-one correspondence manner under a limiting working condition and then to be fixed to the rear release limiting assembly (2) so as to fold the proximal end of the film covered bracket (300) in the rear release limiting assembly (2), and the fork seat (11) drives the fork rods (12) to move towards the distal end direction of the rear release limiting assembly (2) under a release working condition, so that the fork rods (12) are separated from the bracket rings (310) and then the proximal end of the film covered bracket (300) is released;
The rear release limiting assembly (2) is configured to be capable of cooperating with the limiting fork (1) such that the action of releasing the proximal end of the stent graft (300) by the limiting fork (1) occurs after the action of releasing the proximal end of the stent graft (300) by the outer tube (7);
the fork seat (11) and the rear release limiting component (2) are respectively provided with an operation hole through which a guide wire can pass;
one end of each fork rod (12) far away from the fork seat (11) is provided with a fork rod limiting groove (120), and the notch of each fork rod limiting groove (120) extends to the opposite surfaces of two adjacent fork rods (12) facing each other;
The rear release limiting assembly (2) comprises a limiting rod (21) and a fixing seat (22);
the limiting rod (21) comprises a rod body (211) and two limiting wings (212), wherein the proximal ends of the two limiting wings (212) are symmetrically connected to two sides of the proximal end of the rod body (211), the distal ends of the two limiting wings (212) extend towards the distal end direction of the rod body (211) and are opened towards the direction away from the rod body (211), and the two limiting wings (212) are made of elastic materials or the two limiting wings (212) are respectively connected to the rod body (211) through torsion springs;
The fixing seat (22) comprises a columnar body (220), one end in the axial direction of the columnar body (220) is the proximal end of the columnar body (220), the other end in the axial direction of the columnar body (220) is the distal end of the columnar body (220), the direction extending from the proximal end of the columnar body (220) towards the distal end of the columnar body (220) is taken as a first direction, and the direction extending from the distal end of the columnar body (220) towards the proximal end of the columnar body (220) is taken as a second direction:
the columnar body (220) comprises a first reduced diameter section (2201) formed by reducing the diameter of a circumscribed circle of a cross section cut perpendicular to the first direction, wherein the radial outer peripheral surface of the first reduced diameter section (2201) comprises a plurality of limit units (20), each limit unit (20) comprises a fork rod groove (201) and a limit wing groove (202) which are adjacent to each other, an opening of the fork rod groove (201) and an opening of the limit wing groove (202) face the distal end of the columnar body (220), and the limit wing groove (202) is formed into a shape with the opening gradually reduced in the second direction;
The limiting rods (21) comprise a plurality of limiting wing grooves (202) which are in one-to-one correspondence, rod body limiting parts (221) are arranged on the radial outer circumferential surface of the columnar body (220), in each limiting rod (21), the rod bodies (211) penetrate through the rod body limiting parts (221), and the proximal ends of the two limiting wings (212) are inserted into and extruded into the corresponding limiting wing grooves (202);
Under the limiting working condition, the working condition that a plurality of fork rods (12) of the limiting fork (1) are inserted into a plurality of fork rod grooves (201) in a one-to-one correspondence mode is taken as a first working condition, in the first state of the first working condition, the distal ends of the limiting wings (212) are respectively inserted into fork rod limiting grooves (120) of the adjacent fork rods (12), the distal ends of rod bodies (211) extend to the distal ends of columnar bodies (220), in the second state of the first working condition, the limiting rods (21) slide along the second direction under the action of external force, so that in each limiting rod (21), the distal ends of the two limiting wings (212) are continuously extruded by the corresponding limiting wing grooves (202) to be close towards the rod bodies (211), and the distal ends of the limiting wings (212) are respectively separated from the corresponding fork rod limiting grooves (120).
2. The stent graft in-sequence release apparatus of claim 1, wherein,
The rear release limiting assembly (2) further comprises an elastic energy storage piece (23);
The elastic energy storage pieces (23) comprise a plurality of limit wing grooves (202) which are arranged in a one-to-one correspondence manner, and the distal ends of the elastic energy storage pieces (23) are respectively connected or abutted with the proximal ends of rod bodies (211) of limit rods (21) inserted into the corresponding limit wing grooves (202);
In a first state of the first working condition, the elastic energy storage piece (23) is in a free or energy storage state, and in a second state of the first working condition, the limiting rod (21) slides along the second direction to compress or release the elastic energy storage piece (23).
3. The stent graft in-sequence release device of claim 2, wherein the elastic energy storage member (23) is a spring;
In a first state of the first operating mode, the elastic energy storage element (23) is in an incompletely compressed state, in a second state of the first operating mode, the elastic energy storage element (23) is continuously compressed, or in a first state of the first operating mode, the elastic energy storage element (23) is in a free state, and in a second state of the first operating mode, the elastic energy storage element (23) is compressed.
4. The stent graft in-sequence release device of claim 2, wherein the elastic energy storage member (23) is a spring;
in the first state of the first working condition, the elastic energy storage piece (23) is in a stretching state, and in each limiting rod (21), the sum of component forces of friction force of the groove body wall surfaces of the limiting wing grooves (202) received by the two limiting wings (212) in the first direction is larger than elastic restoring force of the corresponding elastic energy storage piece (23) acting on the two limiting wings (212) in the second direction.
5. The stent graft in-sequence release apparatus of any one of claim 2 to 4,
The columnar body (220) further comprises a second diameter reduction section (2202) formed by reducing the diameter of a circumscribing circle of a cross section cut perpendicular to the first direction in the first direction, and the rod body limiting part (221) is positioned between the first diameter reduction section (2201) and the second diameter reduction section (2202).
6. The stent graft in-sequence release arrangement according to any one of claims 2 to 4, wherein the rod stop (221) comprises a plurality of rod stops;
the rod body limiting blocks are distributed on the radial outer circumferential surface of the part, close to the first diameter reduction section (2201), on the far end of the columnar body (220) at intervals, guide holes (2210) are formed in the rod body limiting blocks, the guide holes (2210) are in one-to-one correspondence with the limiting wing grooves (202), and an interval for the fork rod (12) to pass through is formed between every two adjacent rod body limiting blocks and is in one-to-one correspondence with the fork rod groove (201);
In each limiting rod (21), the rod body (211) passes through a guide hole (2210) on the corresponding rod body limiting block.
7. The stent graft in-sequence release device of claim 6, wherein the opening area of the gap on the radially outer circumferential surface of the columnar body (220) decreases gradually from the inside of the columnar body (220) to the outside of the columnar body (220) in the radial direction of the columnar body (220).
8. The stent graft in-sequence release device according to claim 3 or 4, wherein in the stopper rod (21), the rod body (211) comprises a main rod body (2111) and a guide rod body (2112), the distal end of the guide rod body (2112) is connected to the proximal end of the main rod body (2111), and the diameter of a circumscribed circle of a cross section cut along the guide rod body (2112) in the radial direction is smaller than the diameter of a circumscribed circle of a cross section cut along the main rod body (2111) in the radial direction;
The distal end of the elastic energy storage piece (23) is sleeved on the guide rod body (2112), and the distal end face of the elastic energy storage piece (23) is abutted to the proximal end face of the main rod body (2111).
9. The sequential release device of claim 8, wherein a mounting blind hole (203) is further formed in a portion of the columnar body (220) connected to the proximal end face of the limit wing groove (202), the mounting blind hole is communicated with the limit wing groove (202), and the guide rod body (2112) and the elastic energy storage member (23) are inserted into the mounting blind hole (203).
10. The stent graft in-sequence release device according to any one of claims 1 to 4, wherein on each of the prongs (12) of the stop fork (1), the prong stop slot (120) extends through the prongs (12) in the radial circumferential direction of the fork seat (11).
11. The stent graft in-sequence release device of claim 10, wherein the yoke limit groove (120) is recessed from a side surface of the yoke (12) facing the cylindrical body (220) in a direction away from the cylindrical body (220).
12. The stent graft in-sequence release device according to any one of claims 1 to 4, wherein a plurality of hooking protrusions (204) are provided on an outer circumferential surface of a distal end of the columnar body (220), the plurality of hooking protrusions (204) are distributed at intervals in a radial outer circumferential surface of the columnar body (220) for hooking a plurality of stent rings (310) provided at a proximal end of the stent graft (300), and a stent ring limiting groove (2040) is formed between two adjacent hooking protrusions (204).
13. The stent graft in-sequence release device according to any one of claims 1 to 4, wherein an opening area of the yoke groove (201) on a radially outer circumferential surface of the columnar body (220) and an opening area of the limit wing groove (202) on a radially outer circumferential surface of the columnar body (220) each gradually decrease from an inside of the columnar body (220) to an outside of the columnar body (220) in a radial direction of the columnar body (220).
14. A stent graft delivery system comprising a stent graft delivery device and a stent graft sequential post-release device according to any one of claims 1 to 13;
Wherein the tectorial membrane support conveyer comprises a control handle, a guide wire pipe (5), an inner pipe (6) and an outer pipe (7);
the guide wire tube (5) is used for penetrating the guide wire;
The guide wire tube (5) passes through the inner tube (6), and the proximal end of the guide wire tube (5) is inserted into and fixed in the operation hole of the rear release limiting assembly (2), and the proximal end of the inner tube (6) is fixed in the operation hole on the fork seat (11);
The distal end of the outer tube (7) and the distal end of the inner tube (6) are both connected to the control handle, which is configured to be able to drive the outer tube (7) and the inner tube (6) to move back and forth.
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| CN202010840187.1A CN112006812B (en) | 2020-08-19 | 2020-08-19 | Tectorial membrane support post-sequence release device and tectorial membrane support conveying system |
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| CN202010840187.1A CN112006812B (en) | 2020-08-19 | 2020-08-19 | Tectorial membrane support post-sequence release device and tectorial membrane support conveying system |
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| CN114681115B (en) * | 2020-12-30 | 2025-03-28 | 浙江脉通智造科技(集团)有限公司 | Film-covered tube shaping device and shaping method, and film-covered stent preparation method |
| CN113599040B (en) * | 2021-09-17 | 2024-03-08 | 北京有卓正联医疗科技有限公司 | Front-end rear-release mechanism of interventional stent conveyor, conveyor and use method |
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| CN114098883B (en) * | 2022-01-27 | 2022-06-17 | 上海微创心脉医疗科技(集团)股份有限公司 | Support conveying device and support conveying system |
| CN116942383B (en) * | 2023-09-19 | 2023-12-15 | 北京华脉泰科医疗器械股份有限公司 | Tectorial membrane support secondary release device and tectorial membrane support conveying system |
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| CN104706449A (en) * | 2013-12-17 | 2015-06-17 | 微创心脉医疗科技（上海）有限公司 | Stent delivery system and later releasing assembly thereof |
| CN212234796U (en) * | 2020-08-19 | 2020-12-29 | 北京华脉泰科医疗器械有限公司 | Stent Graft Sequential Post-Release Device and Stent Graft Delivery System |
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| CN112006812A (en) | 2020-12-01 |
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