CN112914680B - Reverse penetration remote protection device - Google Patents
Reverse penetration remote protection device Download PDFInfo
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- CN112914680B CN112914680B CN202110168054.9A CN202110168054A CN112914680B CN 112914680 B CN112914680 B CN 112914680B CN 202110168054 A CN202110168054 A CN 202110168054A CN 112914680 B CN112914680 B CN 112914680B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/22—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for
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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
- 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
- A61F2/01—Filters implantable into blood vessels
- A61F2/013—Distal protection devices, i.e. devices placed distally in combination with another endovascular procedure, e.g. angioplasty or stenting
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/09—Guide wires
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/09—Guide wires
- A61M25/09041—Mechanisms for insertion of guide wires
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/22—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for
- A61B2017/22038—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for with a guide wire
-
- 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
- A61F2/01—Filters implantable into blood vessels
- A61F2002/016—Filters implantable into blood vessels made from wire-like elements
-
- 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
- A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2250/0058—Additional features; Implant or prostheses properties not otherwise provided for
- A61F2250/0096—Markers and sensors for detecting a position or changes of a position of an implant, e.g. RF sensors, ultrasound markers
- A61F2250/0098—Markers and sensors for detecting a position or changes of a position of an implant, e.g. RF sensors, ultrasound markers radio-opaque, e.g. radio-opaque markers
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/32—General characteristics of the apparatus with radio-opaque indicia
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- Heart & Thoracic Surgery (AREA)
- General Health & Medical Sciences (AREA)
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- Oral & Maxillofacial Surgery (AREA)
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Abstract
The invention provides a reverse-penetrating far-end protection device, which relates to the field of medical equipment and comprises a guide wire and a protection umbrella, wherein a support tube is reversely sleeved outside the guide wire, a strip-shaped opening is formed in the tube wall of the support tube, a developing part or a developing coating is arranged at the proximal end of the support tube, a sliding guide part of a guide limiting block is slidably arranged in the strip-shaped opening and connected with the guide wire, a fixed limiting part of the guide limiting block is positioned outside the support tube, a first end of an elastic support open loop is connected with the proximal end of the support tube, a second end of the elastic support open loop is connected with the fixed limiting part, a developing part or the developing coating is arranged on the elastic support open loop, an elastic filter membrane axially surrounds and is connected with the support tube, and the opening of the elastic filter membrane is connected with the elastic support open loop. The invention relieves the technical problems that the prior distal end protecting device for peripheral blood vessels is smooth, namely, when the guide wire is inserted along the blood flow direction, the guide wire is difficult to penetrate through the lesion thrombus with harder artery, thereby the operation difficulty is higher, the complexity is higher, the operation risk is increased and the postoperative recovery is not facilitated.
Description
Technical Field
The invention relates to the technical field of medical equipment, in particular to a reverse-penetrating distal end protection device.
Background
Peripheral arterial vascular occlusive disease is a group of vascular diseases which seriously threaten human health, the incidence rate of the vascular diseases is obviously increased in recent years, and common vascular diseases comprise arteriosclerosis obliterans, arterial thrombosis, aneurysms and the like, wherein the lower limb arteriosclerosis obliterans are the most common vascular surgical diseases and are the main reasons for causing chronic lower limb ischemia, the incidence rate of the vascular diseases is increased along with the age, the incidence rate of the lower limb arteriosclerosis obliterans under 60 years old is about 5.6%, the incidence rate of the arterial diseases under 60-70 years old is up to 15.9%, the incidence rate of the arterial diseases over 70 years old is about 33.8%, and the incidence rate of the arterial diseases of male lower limb arteriosclerosis obliterans is slightly higher than that of females. The cause of the lower limb arteriosclerosis obliterans is not clear, hyperlipidemia, hypertension, diabetes mellitus, smoking and the like are main dangerous factors causing the lower limb arteriosclerosis obliterans, the main causes of the lower limb arteriosclerosis obliterans are cardiovascular and cerebrovascular complications, the 5-year fatality rate of intermittent claudication patients is about 30%, and the 5-year fatality rate of lower limb ischemia patients with resting pain, ulcer and gangrene is 70%.
The pathological basis of peripheral arterial vascular occlusive disease is the formation of atherosclerotic plaques in the arterial vessels of the limbs, causing lumen stenosis or occlusion, and secondary thrombosis. The pathological changes are mainly characterized by the formation of vascular intimal atheromatous plaques, early lipid deposition of the intima of the artery to form fibrous plaques, necrosis of deep cells of the fibrous plaques to form atheromatous plaques, atrophy and necrosis of the intimal layers of the artery, collagen fibers and calcium deposition, no pathological changes of the adventitia, protrusion of the atheromatous plaques and calcified plaques into the lumen after the atheromatous plaques are formed, narrow or occlusion of the lumen, chronic ischemia of the tissue of the distal limb, arterial embolism caused by internal hemorrhage or rupture of the atheromatous plaques and the like, and acute limb ischemia. The clinical manifestations of patients are intermittent claudication, resting pain, ischemic ulcer, limb gangrene and other symptoms, the main signs are limb terminal skin temperature reduction, lower limb arterial pulsation weakening or disappearance, lower limb arterial contraction reduction, skin dystrophy change, and the change comprises skin thinness, hair loss, nail deformation and the like, limb ulcer, gangrene and the like.
The interventional endoluminal treatment has the characteristics of small trauma and lower requirements on the physical condition of the patient than the traditional surgical operation, and along with the development of medical materials and imaging technology, the endoluminal treatment has been widely applied to the treatment of peripheral arterial vascular occlusive diseases in recent years.
Percutaneous balloon angioplasty and stenting are one of the main means of intracavity treatment, and the principle is that the physical expansion of the balloon and the radial supporting force of the stent are used for relieving vascular stenosis, pressing the atherosclerosis plaque to the arterial wall, increasing the inner diameter of the vessel at the stenosis section and improving the blood supply at the distal end of limbs. But after years of clinical application, the long-term vascular patency rate of the balloon angioplasty and the stent implantation is not ideal, the re-intervention treatment rate is required to be higher, the effect of treating short-stage lesions of <3cm is better, the 5-year patency rate can reach 75%, the long-term patency rate of narrow and occlusive lesions of long-stage is not ideal, the 6-month patency rate of <7cm narrow lesions is 86.8%, and the 6-month patency rate of narrow lesions of >7cm is only 23.1%.
In order to solve the defects of the saccule and the stent in the lower limb arterial lesions, a plurality of novel intervention devices, such as catheter aspiration embolus technology and plaque cutting technology, are developed in recent years, are used in clinic in a large amount due to the novel design concept, and the working principle is that the atheromatous plaque in the arterial lumen is conveyed to the outside of the body through the catheter by aspiration and mechanical rotary cutting of the rotary cutting blade after the high-speed water flow flushing of the catheter head end, so that the lumen can be effectively enlarged, the blood flow channel is rebuilt, the far-end blood supply is improved, and the atheromatous plaque is a good device for solving the peripheral vascular sclerosis occlusion lesions. However, whether the catheter suction technology or the plaque rotary cutting technology is adopted, calcified plaque in the arterial lumen can be broken in the process of thrombus extraction, and the broken plaque is very easy to block a distal arterial vessel, so that the risk of necrosis and even amputation of distal tissues caused by non-circulation of blood is caused. Therefore, the peripheral blood vessel is required to be used for filtering out emboli in blood by using a distal protection device, and then the emboli are conveyed to the outside of the body through a catheter, so that the distal emboli in the interventional thrombolysis operation process are avoided.
In the operation process, the guide wire of the distal end protection device for the peripheral blood vessel firstly passes through the lesion area, and then other treatment catheters are guided into the guide wire to pass through the tortuous blood vessel, but arterial plaque is harder, and when the guide wire is inserted in the direction of blood flow, the guide wire is difficult to pass through lesion thrombus, so that the operation difficulty is higher, the complexity is higher, the operation risk is increased, and the postoperative recovery of a patient is not facilitated.
Disclosure of Invention
The invention aims to provide a reverse-penetrating distal protection device, so as to solve the technical problems that when a guide wire is inserted into the existing distal protection device for peripheral blood vessels along the blood flow direction, the guide wire is difficult to penetrate through a lesion thrombus with harder artery, so that the operation difficulty is high, the complexity is high, the operation risk is increased, and the postoperative recovery of a patient is not facilitated.
In order to achieve the above purpose, the embodiment of the present invention adopts the following technical scheme:
the embodiment of the invention provides a reverse-penetrating distal protection device, which comprises a guide wire and a protection umbrella, wherein the protection umbrella comprises a support tube, an elastic support open loop, a guide limiting block and a pocket-shaped elastic filter membrane;
the support tube is reversely sleeved outside the guide wire;
The tube wall of the support tube is provided with a strip-shaped opening which penetrates through the tube wall of the support tube and extends along the axial direction of the support tube, the proximal end of the support tube is connected with a developing component or the peripheral surface of the proximal end of the support tube is coated with a developing coating;
The guide limiting block comprises a fixed limiting part and a sliding guide part which are integrally or fixedly connected, the sliding guide part is arranged in the strip-shaped opening in a sliding manner and is fixedly connected with the guide wire, and the fixed limiting part is positioned outside the supporting tube;
The first end of the elastic support open loop is integrally or fixedly connected to the proximal end of the supporting tube, and the second end of the elastic support open loop is integrally or fixedly connected to the fixed limiting part after being bent in the distal direction at a position close to the first end of the elastic support open loop;
the elastic filter membrane surrounds and is connected to the support tube along the axial direction of the support tube, and the opening of the elastic filter membrane is connected to the elastic support ring-opening.
In an alternative embodiment, a perforation penetrating through the sliding guide part along the axial direction of the supporting tube is formed on the sliding guide part, and the guide wire passes through and is fixedly connected to the inside of the perforation.
In an alternative embodiment, the sliding guide part is in a circular tube shape, and the peripheral wall of the sliding guide part is in contact with the tube wall of the support tube.
In an alternative embodiment, a mounting groove is formed in the fixing limiting portion, and the second end of the elastic support open loop is inserted into and fixedly connected to the mounting groove.
In an alternative embodiment, a step surface is formed between the proximal end surface of the fixed limiting portion and the proximal end surface of the sliding guide portion, and the proximal end surface of the fixed limiting portion is located at the distal end of the sliding guide portion.
In an alternative embodiment, the visualization component includes a proximal visualization ring coupled to the proximal end of the support tube, the guidewire passing through the proximal visualization ring.
In an alternative embodiment, a distal developing ring is attached to the distal end of the support tube, and the guidewire passes through the distal developing ring.
In an alternative embodiment, the distal end region of the elastic filter membrane is formed as a continuous membrane covered region that is not perforated with filter pores.
In an alternative embodiment, the open edge of the elastic filter membrane is wound and then fixed to form a tubular edge through which the elastic support ring is passed.
In an alternative embodiment, a distal end supporting ring is further connected to the distal end of the supporting tube, the elastic filter membrane is connected to the surface of the distal end supporting ring or supported outside the distal end supporting ring, and a developing component is arranged on the distal end supporting ring or a developing coating is coated on the distal end supporting ring.
The embodiment of the invention can realize the following beneficial effects:
The embodiment of the invention provides a reverse-penetrating distal protection device which comprises a guide wire and a protection umbrella, wherein the protection umbrella comprises a support tube, an elastic support open loop, a guide limiting block and a pocket-shaped elastic filter membrane. The elastic support ring comprises a guide wire, a support tube, a guide limiting block, an elastic filter membrane, a fixing limiting part, a fixing limiting part and a second end, wherein the support tube is reversely sleeved outside the guide wire, a strip-shaped opening which penetrates through the tube wall of the support tube and extends along the axial direction of the support tube is formed in the tube wall of the support tube, a developing part is connected to the proximal end of the support tube, or a developing coating is coated on the peripheral surface of the proximal end of the support tube 2, the guide limiting block comprises a fixing limiting part and a sliding guiding part which are integrally or fixedly connected, the sliding guiding part is arranged inside the strip-shaped opening and fixedly connected to the guide wire, the fixing limiting part is positioned outside the support tube, the first end of the elastic support ring is integrally or fixedly connected to the proximal end of the support tube, the second end of the elastic support ring is integrally or fixedly connected to the fixing limiting part after being bent towards the distal end of the first end of the elastic support ring, a developing part is connected to the elastic support ring or a developing coating is coated on the elastic support ring, the elastic filter membrane is enclosed along the axial direction of the support tube and connected to the support tube, and the opening of the elastic filter membrane is connected to the elastic support ring.
The embodiment of the invention is based on the principle that the guide wire is retrograde, namely, the thrombus is easy to insert along the opposite direction of blood flow, and the improved distal end protection device for the existing peripheral blood vessel is provided for the distal end protection device, and can retrograde treat the guide wire of the protective umbrella by penetrating through the lesion part, and then the intercepted thrombus is taken out from the blood vessel after the treatment is finished, so that the thrombus is not leaked in the taking-out process, and the device has the advantages of at least being simple to operate, reducing the operation difficulty and the operation risk, and being beneficial to recovery of patients after operation.
In addition, in the embodiment of the invention, the elastic filter membrane is supported by arranging the elastic support ring, so that the opening of the elastic filter membrane can be supported, the opening of the elastic filter membrane can be completely attached to the wall of the blood vessel after the protective umbrella of the reverse-penetrating distal protection device is stretched into the blood vessel, namely, the opening of the elastic filter membrane has good attachment property, so that all embolic substances in blood can be filtered and intercepted by the elastic filter membrane, and the problems of downstream blood vessel blockage and tissue necrosis caused by lack of nutrient substance delivery due to leakage of embolic substances from the opening of the elastic filter membrane to the wall of the blood vessel are avoided.
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 a reverse-wearing distal protection device according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of the whole structure of a protective umbrella in the reverse-wearing distal protection device according to the embodiment of the present invention;
fig. 3 is a schematic diagram of the overall structure of a guide stopper in the reverse-penetrating distal protection device according to the embodiment of the present invention;
fig. 4 is a schematic overall structure of an elastic support ring in a reverse-penetrating distal protection device according to an embodiment of the present invention.
The icons are 1-guide wire, 2-support tube, 20-strip opening, 21-proximal developing ring, 22-distal developing ring, 3-elastic support ring, 4-guide stopper, 41-fixed stopper, 410-mounting groove, 42-sliding guide, 420-perforation, 5-elastic filter membrane, 50-tubular edge.
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 "upper", "lower", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or those that are conventionally put in use, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements to be referred to must have a specific direction, be constructed 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.
Furthermore, the term "proximal" refers to the end that is operatively closer to the heart of a human body, i.e., the upstream end of the blood flow, and "distal" refers to the other end opposite the "proximal".
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 fixedly connected, detachably connected, or integrally connected, or may be directly connected, or may be indirectly connected through an intermediate medium, or may be in communication with each other in two elements. The specific meaning of the terms above in the present invention will be understood by those of ordinary skill in the art in the specific context, and specifically defined fixed connections include, but are not limited to, adhesive, welding, etc.
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.
The embodiment provides a reverse-penetrating distal end protection device, which comprises a guide wire 1 and a protection umbrella, and is characterized in that the protection umbrella comprises a support tube 2, an elastic support open loop 3, a guide limiting block 4 and a pocket-shaped elastic filter membrane 5, and referring to fig. 1-4.
The support tube 2 is reversely sleeved outside the guide wire 1, a strip-shaped opening 20 penetrating through the tube wall of the support tube 2 and extending along the axial direction of the support tube 2 is formed in the tube wall of the support tube 2, a developing part is connected to the proximal end of the support tube 2, or a developing coating is coated on the peripheral surface of the proximal end of the support tube 2. The guide limiting block 4 comprises a fixed limiting part 41 and a sliding guide part 42 which are integrally or fixedly connected, the sliding guide part 42 is arranged in the strip-shaped opening 20 in a sliding mode and is fixedly connected with the guide wire 1, and the fixed limiting part 41 is located outside the supporting tube 2. The first end of the elastic support ring 3 is integrally or fixedly connected to the proximal end of the support tube 2, the second end of the elastic support ring 3 is integrally or fixedly connected to the fixed limiting part 41 after being bent in the distal direction at a position close to the first end of the elastic support ring 3, and a developing part is connected to the elastic support ring 3 or a developing coating is coated on the elastic support ring 3, for example, but not limited to, a developing spring is sleeved outside the elastic support ring 3. The elastic filter membrane 5 surrounds and is connected to the support tube 2 in the axial direction of the support tube 2, and the opening of the elastic filter membrane 5 is connected to the elastic support ring 3. In this embodiment, the elastic support ring 3 may be, but is not limited to, a spring-like structure wound from radiopaque wires.
Referring to fig. 1, during operation, the protective umbrella of the distal end protector for peripheral blood vessel is delivered to the far end of the affected part by using a guide catheter and a guide wire and released at a distance of about 2cm-4cm so as to filter thrombus, and after the operation is finished, the protective umbrella of the reverse-penetrating distal end protector is withdrawn from the body by using a recovery catheter and recovered. The method comprises the steps of firstly, inserting the rear end of a guide wire 1 of the reverse-penetrating far-end protecting device into the guide catheter from the front end of the guide catheter and penetrating out of the guide catheter from the second perforation, holding the guide catheter, pulling the rear end of the guide wire 1 until the protective umbrella is pulled into the guide catheter completely and the proximal end of the protective umbrella is positioned at the rear side of the first perforation, then penetrating the guide wire from the first perforation into the guide catheter, leading the front end of the guide wire out of the front end of the guide catheter, and then reversely moving, namely slowly pushing the guide catheter and the guide wire towards the human body along the opposite direction of blood flow, ensuring that the guide wire sends the guide catheter into the far end of an affected part, withdrawing the guide wire 1 after reaching the far end of the affected part, holding the guide wire 1, withdrawing the guide catheter, slowly releasing an elastic support 3 at the near end of the protective umbrella along with the guide wire, slowly releasing the rear end of the protective umbrella until the protective umbrella is pulled into the guide catheter and the protective umbrella is pulled into the guide catheter completely and the rear side of the first perforation, then penetrating the guide wire from the front end of the guide catheter from the first perforation, slowly pushing the guide wire into the human body along the reverse direction, ensuring that the guide wire is pushed into the open end of the guide wire by the protective umbrella by the elastic support 1, and the protective umbrella can be opened by a certain distance, and the protective umbrella can be opened by a protection ring 1 in the axial direction, and the protective umbrella can be opened when the protective umbrella is placed in the opposite to the protection segment, and the protection segment is opened, and the protection segment can be opened by a protection segment is shaped, and the protection segment is opened by a protection segment is a protection segment or a protection segment is shaped;
And (3) after the affected part is treated and the relevant treatment accessories are withdrawn, penetrating the rear end of the guide wire 1 into the recovery conduit from the front end of the recovery conduit, slowly pushing the recovery conduit forward, when the front end of the recovery conduit is propped against the far end of the protection umbrella, pulling the guide wire 1 backward, sliding the sliding guide part 42 of the guide limit block 4 connected to the guide wire 1 along the strip-shaped opening 20 towards the far end of the protection umbrella to gradually shrink the elastic filter membrane 5, and when the fixed limit part 41 of the guide limit block 4 is contacted with the far end surface of the strip-shaped opening 20, completely sealing the opening of the elastic filter membrane 5 of the protection umbrella, at the moment, thrombus intercepted by the protection umbrella can not leak, continuing to pull the guide wire 1 backward, driving the elastic support open loop 3 to slide into the recovery conduit by the fixed limit part 41 of the guide limit block 4, gradually compressing the protection umbrella containing thrombus and being coated on the recovery conduit, and withdrawing the guide wire 1 and the recovery conduit from the blood vessel together, namely, achieving the purpose of recovering the far end protection device for peripheral blood vessel.
In the whole operation process, the development part connected with the proximal end of the support tube 2 and the development part connected with the elastic support ring 3 or the development coating coated on the elastic support ring 3 are used as key development marks for operation reference, so as to determine the release and recovery positions of the protection umbrella and the inlet position of the elastic filter membrane 5 in the opened state, and improve the operation efficiency and operation safety.
The embodiment of the invention is based on the principle that the guide wire 1 is retrograde, namely, the thrombus is easy to insert along the opposite direction of blood flow to pass through the pathological change thrombus, and the improved distal end protecting device for the conventional distal end protecting device for peripheral blood vessels can retrograde treat the peripheral blood vessels by passing the protective umbrella guide wire 1 through the pathological change position, and then the intercepted thrombus is taken out from the blood vessels after the treatment is finished, so that the thrombus is not leaked in the taking-out process, and the improved distal end protecting device at least has the advantages of being simple to operate, reducing the operation difficulty and the operation risk and being beneficial to recovery of patients after operation.
In addition, in this embodiment, the elastic support ring 3 is provided to support the elastic filter membrane 5, so that the opening of the elastic filter membrane 5 can be supported, so that after the protective umbrella of the reverse-penetrating distal protection device stretches into a blood vessel, the opening of the elastic filter membrane 5 can be completely attached to the wall of the blood vessel, that is, the opening of the elastic filter membrane 5 has good attachment property, so that the embolic material in blood can be completely filtered and intercepted by the elastic filter membrane 5, and the problems of downstream blood vessel blockage and tissue necrosis due to lack of nutrient delivery caused by leakage of embolic material from the opening of the elastic filter membrane 5 and the blood vessel wall can be avoided.
Referring to fig. 3, in an alternative implementation of the present embodiment, a through hole 420 penetrating the sliding guide portion 42 in the axial direction of the support tube 2 is formed in the sliding guide portion 42, and the guide wire 1 passes through and is fixedly connected to the inside of the through hole 420. In order to improve the sliding stability, the sliding guide portion 42 is preferably in a circular tube shape, and the outer peripheral wall of the sliding guide portion 42 is in contact with the wall of the support tube 2.
With continued reference to fig. 3, in an alternative implementation of the present embodiment, a mounting groove 410 is provided on the fixing and limiting portion 41, and the second end of the elastic support ring 3 is inserted into and fixedly connected to the mounting groove 410.
With continued reference to fig. 3, in an alternative implementation of the present embodiment, preferably, a stepped surface is formed between the proximal end surface of the fixed limiting portion 41 and the proximal end surface of the sliding guide portion 42, and the proximal end surface of the fixed limiting portion 41 is located at the distal end of the sliding guide portion 42.
Referring to fig. 1 and 2, in an alternative configuration of the present embodiment, it is preferable that the developing means includes a proximal developing ring 21 connected to the proximal end of the support tube 2, and the guide wire 1 passes through the proximal developing ring 21. Optionally, a distal developing ring 22 is further connected to the distal end of the support tube 2, and the guide wire 1 passes through the distal developing ring 22. The proximal and distal developer rings 21, 22 may be, but are not limited to, welded or glued or screwed to the corresponding ends of the support tube 2, and the proximal and distal developer rings 21, 22 are preferably, but not limited to, made of non-wire-cast metal tubing, the outer annular surface of the developer rings preferably being a polished smooth flat surface to avoid touching or scraping the vessel or elastomeric filter 5.
In an alternative implementation of the present embodiment, the elastic filter membrane 5 is formed with a conical overall outer contour in the open state.
In addition, in order to accommodate finer emboli and prevent thrombus leakage, in an alternative structure of the present embodiment, it is preferable that the distal end region of the elastic filter membrane 5 is formed as a continuous membrane covered region where no filter hole is opened.
Referring to fig. 1 and 2, in an alternative implementation of the present embodiment, it is preferable that the opening edge of the elastic filter membrane 5 is wound and fixed to form a tubular edge 50, and the elastic support ring 3 passes through the tubular edge 50.
In order to further improve the developability of the reverse-penetrating distal protection device, in some optional implementations of this embodiment, it is preferable that a distal support ring (not shown) is further connected to the distal end of the support tube 2, the elastic filter membrane 5 is connected to the surface of the distal support ring or supported outside the distal support ring, and a developing component is disposed on the distal support ring or a developing coating is coated on the distal support ring, so as to effectively obtain the overall length and specific position and shape information of the protection umbrella, further improving the convenience and safety of the operation, and in this case, the overall outline of the elastic filter membrane 5 in the open state may be formed into, but is not limited to, a frustum shape.
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 (7)
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| CN202110168054.9A CN112914680B (en) | 2021-02-04 | 2021-02-04 | Reverse penetration remote protection device |
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| CN113974712B (en) * | 2021-10-29 | 2024-07-26 | 上海御瓣医疗科技有限公司 | Device for protecting cerebral vessels in cardiovascular surgery |
| CN114305590B (en) * | 2022-03-16 | 2022-06-21 | 北京华脉泰科医疗器械股份有限公司 | Far-end protector |
| CN115153949B (en) * | 2022-07-19 | 2023-06-23 | 心凯诺医疗科技(上海)有限公司 | Distal embolic protection device and manufacturing method thereof |
| CN114916994B (en) * | 2022-07-22 | 2022-11-01 | 北京华脉泰科医疗器械股份有限公司 | Nidus extractor |
| CN118750227A (en) * | 2024-07-04 | 2024-10-11 | 信阳市中心医院 | Distal embolic protection device |
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| US6544279B1 (en) * | 2000-08-09 | 2003-04-08 | Incept, Llc | Vascular device for emboli, thrombus and foreign body removal and methods of use |
| CN214761327U (en) * | 2021-02-04 | 2021-11-19 | 北京华脉泰科医疗器械股份有限公司 | Reverse-penetrating far-end protection device |
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| JP5951955B2 (en) * | 2011-10-17 | 2016-07-13 | 株式会社東海メディカルプロダクツ | Filter device for embolization substance capture |
| CN112022426A (en) * | 2020-09-18 | 2020-12-04 | 聚辉医疗科技(深圳)有限公司 | Embolic protection device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6544279B1 (en) * | 2000-08-09 | 2003-04-08 | Incept, Llc | Vascular device for emboli, thrombus and foreign body removal and methods of use |
| CN214761327U (en) * | 2021-02-04 | 2021-11-19 | 北京华脉泰科医疗器械股份有限公司 | Reverse-penetrating far-end protection device |
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