CN109331321B - Guide wire catching device - Google Patents

Guide wire catching device Download PDF

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Publication number
CN109331321B
CN109331321B CN201811132125.4A CN201811132125A CN109331321B CN 109331321 B CN109331321 B CN 109331321B CN 201811132125 A CN201811132125 A CN 201811132125A CN 109331321 B CN109331321 B CN 109331321B
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net
mandrel
shaped
sleeve
guide wire
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CN109331321A (en
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罗建方
成正辉
尹周
肖西良
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APT MEDICAL Inc
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APT MEDICAL Inc
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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
    • 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
    • A61M2025/0177—Introducing, guiding, advancing, emplacing or holding catheters having external means for receiving guide wires, wires or stiffening members, e.g. loops, clamps or lateral tubes

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biophysics (AREA)
  • Pulmonology (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)

Abstract

The application discloses device is arrested to seal wire includes: the device comprises a mandrel (1) and a net-shaped capturing mechanism (2) fixedly connected with the mandrel (1), wherein the net-shaped capturing mechanism (2) can be expanded into a net shape by self expansion or stretched into a long strip shape. The guide wire catching device can assist a reverse guide wire to enter a forward guide catheter, shorten the operation time, and reduce the radioactive exposure time and the contrast agent dosage; meanwhile, the risk of damage to the instrument can be reduced, and the use of other instruments is reduced, so that the success rate of the operation is improved.

Description

Guide wire catching device
Technical Field
The application relates to the technical field of medical equipment, in particular to a guide wire catching device.
Background
The coronary artery chronic total occlusion lesion (CTO) refers to the lesion with the total occlusion of the lesion part of the coronary artery, the blood flow of the thrombolysis Therapy (TIMI) for myocardial infarction is graded as 0 grade through the verification of coronary angiography, and the occlusion time is more than or equal to 3 months. Because the lesion part is special and the lesion calcification is serious, the success rate of interventional therapy is low, and the surgical complications are high, so the heart-shaped coronary artery interventional therapy has a fortress which is difficult to overcome in the field of coronary artery interventional therapy.
The application of the retrograde guidewire technique through collateral vessels in recent years is undoubtedly helpful to improve the success rate of CTO intervention. After the reverse guide wire passes through the collateral channel, the success rate of the operation is increased to more than 90%, and the application of the reverse technology can improve the total success rate of CTO intervention by more than 10%.
When the retrograde guidewire technique is used for treating the CTO, a forward orbit needs to be established after the retrograde guidewire passes through a vascular occlusion section. Some methods for establishing the forward track include: firstly, a reverse guide wire directly enters a forward guide catheter and then is pushed out; a double-micro-catheter butt joint technology; and thirdly, the forward guide wire is butted with the reverse microcatheter, the three methods all need to firstly control the reverse guide wire to enter the forward guide catheter, however, the vascular occlusion part and the forward guide catheter are difficult to be coaxial, and the reverse guide wire can be extremely difficult to enter the forward guide catheter.
Therefore, how to achieve the smooth docking of the reverse guide wire and the forward guiding catheter is a technical problem to be solved urgently by those skilled in the art.
Disclosure of Invention
In order to solve the above technical problems, an object of the present invention is to provide a guide wire catching device; the guide wire catching device can assist a reverse guide wire to enter a forward guide catheter, shorten the operation time, and reduce the radioactive exposure time and the contrast agent dosage; meanwhile, the risk of damage to the instrument can be reduced, and the use of other instruments is reduced, so that the success rate of the operation is improved.
The technical scheme provided by the invention is as follows:
a guidewire capture device comprising: the net-shaped catching mechanism can be expanded into a net shape by self expansion or stretched into a long strip shape.
Preferably, the mesh capture mechanism can be self-expanded and expanded into a mesh shape, or stretched into a long strip shape, specifically: the sleeve is sleeved on the mandrel and the outer side of the net-shaped catching mechanism, and the inner diameter of the sleeve is larger than or equal to the diameter of the net-shaped catching mechanism which is stretched into a long strip shape and is smaller than the diameter of the net-shaped catching mechanism which is unfolded.
Preferably, one end of the mesh-shaped capturing mechanism, which is far away from the far end of the mandrel, is provided with a near-end connecting point, and the near-end connecting point is fixedly connected with the mandrel.
Preferably, the end of the mesh capture mechanism away from the proximal connection point is provided with a distal connection point, and the distal connection point is axially movable along the mandrel.
Preferably, the net-shaped catching mechanism is made of a metal material with a shape memory effect or a polymer material with high elasticity, or is made of a combination of a metal material with a shape memory effect and a polymer material with high elasticity.
Preferably, the mesh capture mechanism is made by laser cutting or by weaving.
Preferably, the mandrel is made of metal or a polymer material, or a combination of metal and a polymer material.
Preferably, the distal end of the mandrel is provided with a head sleeve, and the hardness of the head sleeve is lower than that of the mandrel.
Preferably, any one or more of the mandrel, the mesh capture mechanism, and the headgear is provided with a visualization marker.
Preferably, the development mark is made of any one or more of gold, platinum, tantalum, tungsten, platinum iridium, or doped with BaSO4Or Bi2O3Is made of the polymer material.
The retrograde guide wire technology is a technology which utilizes a guide wire to pass through a traffic blood vessel formed by collateral circulation of the contralateral side or the ipsilateral side in a heart coronary artery blood vessel, enter the far end of an occlusion blood vessel lesion area and treat a chronic complete occlusion lesion area in various different modes. In this application, retrograde refers to a direction opposite to the direction of blood flow. The reverse guide wire needs to be butted with the forward guide catheter after passing through an occluded lesion area. However, with snares, the following problems exist: firstly, the reverse guide wire is not easy to be released in the forward guide catheter, thereby increasing the operation time; second, bending of the tip of the guide wire can easily result in breakage of the guide wire. However, if a mode of establishing a forward channel by adopting double microcatheter butt joint or forward guide wire butt joint reverse microcatheter is adopted, the problem that the guide wire is not easy to withdraw from the microcatheter and the microcatheter is easy to damage also exists.
In view of the above-mentioned problems of the prior art, the present application provides a guidewire capture device comprising: the net-shaped catching mechanism can be expanded into a net shape by self expansion or stretched into a long strip shape. When the net-shaped catching mechanism is unfolded, a plurality of gaps exist in the net, and a larger space exists in the net-shaped catching mechanism, so that the guide wire can conveniently stretch into the net-shaped catching mechanism; when the net-shaped capturing mechanism is stretched into a long strip shape, the internal space is reduced, the guide wire is constrained in the net-shaped structure and clamped tightly, then the mandrel fixedly connected with the net-shaped capturing mechanism is pulled to move the net-shaped capturing mechanism, so that the guide wire can be driven to move and enter the finger guide tube, and the butt joint of the guide wire and the guide tube is smoothly realized. The application provides a device is arrested to seal wire, to arresting, fixed and the removal in-process of seal wire can not make the seal wire head end buckle to can when needs release, make netted mechanism of arresting expand once more, can release the seal wire smoothly. The guide wire catching device can assist a reverse guide wire to enter a forward guide catheter, shorten the operation time, and reduce the radioactive exposure time and the contrast agent dosage; meanwhile, the risk of damage to the instrument can be reduced, and the use of other instruments is reduced, so that the success rate of the operation is improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of one configuration of a guidewire capture device in an embodiment of the present invention;
FIG. 2 is a schematic view of another configuration of a guidewire capture device in an embodiment of the present invention;
FIG. 3 is a schematic view of another configuration of a guidewire capture device in an embodiment of the present invention;
FIG. 4 is a schematic view of another configuration of a guidewire capture device in an embodiment of the present invention;
FIG. 5 is a schematic view of another configuration of a guidewire capture device in an embodiment of the present invention;
FIG. 6 is a schematic view of a guidewire capture device in accordance with an embodiment of the present invention in use; wherein:
(I) feeding the guide wire catching device along the guide catheter c until the far end of the mesh catching mechanism is close to the head end of the guide wire b;
(II) withdrawing the sleeve 3 to expand the reticular capture mechanism 2 in the blood vessel until the diameter of the blood vessel is adapted;
(III) pushing the guide wire b to enable the head end of the guide wire b to enter the inner space of the reticular capture mechanism 2;
(IV) keeping the positions of the guide wire catching device and the guide wire b unchanged, pushing the sleeve 3 forward to enable the net-shaped catching mechanism 2 to contract, clamping the head end of the guide wire b and recovering the guide wire b into the sleeve 3;
(V) keeping the relative position of the guide wire catching device and the sleeve 3 unchanged, withdrawing the guide wire catching device and the sleeve together, and pulling the guide wire b into the guide catheter c.
Reference numerals: 1-mandrel; 2-a mesh catching mechanism; 21-a proximal attachment point; 22-a distal connection point; 3-sleeving a pipe; 4-headgear; 5-developing the mark; a-the site of occlusion; b-a guide wire; c-guiding catheter.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
As shown in fig. 1 to 6, an embodiment of the present invention provides a guidewire capture device, including: the device comprises a mandrel 1 and a net-shaped capturing mechanism 2 fixedly connected with the mandrel 1, wherein the net-shaped capturing mechanism 2 can be expanded into a net shape or stretched into a long strip shape.
The retrograde guide wire technology is a technology which utilizes a guide wire to pass through a traffic blood vessel formed by collateral circulation of the contralateral side or the ipsilateral side in a heart coronary artery blood vessel, enter the far end of an occlusion blood vessel lesion area and treat a chronic complete occlusion lesion area in various different modes. In this application, retrograde refers to a direction opposite to the direction of blood flow. The reverse guide wire needs to be butted with the forward guide catheter after passing through an occluded lesion area. However, with snares, the following problems exist: firstly, the reverse guide wire is not easy to be released in the forward guide catheter, thereby increasing the operation time; second, bending of the tip of the guide wire can easily result in breakage of the guide wire. However, if a mode of establishing a forward channel by adopting double microcatheter butt joint or forward guide wire butt joint reverse microcatheter is adopted, the problem that the guide wire is not easy to withdraw from the microcatheter and the microcatheter is easy to damage also exists.
In view of the above-mentioned problems of the prior art, the present application provides a guidewire capture device comprising: the device comprises a mandrel 1 and a net-shaped capturing mechanism 2 fixedly connected with the mandrel 1, wherein the net-shaped capturing mechanism 2 can be expanded into a net shape or stretched into a long strip shape. When the net-shaped catching mechanism 2 is unfolded, a plurality of gaps exist in the net, and a larger space exists in the inside of the net-shaped catching mechanism 2, so that a guide wire can conveniently extend into the inside of the net-shaped catching mechanism 2; when the net-shaped capturing mechanism 2 is stretched into a long strip shape, the internal space is reduced, the guide wire is constrained inside the net-shaped structure and clamped tightly, then the mandrel 1 fixedly connected with the net-shaped capturing mechanism 2 is pulled to move the net-shaped capturing mechanism 2, so that the guide wire can be driven to move and enter the finger guide tube, and the butt joint of the guide wire and the guide catheter is smoothly realized. The application provides a device is arrested to seal wire catches, fixes and removes the in-process and can not make the seal wire head end buckle to can release when needs, make netted catching mechanism 2 expand once more, can release the seal wire smoothly. The guide wire catching device can assist a reverse guide wire to enter a forward guide catheter, shorten the operation time, and reduce the radioactive exposure time and the contrast agent dosage; meanwhile, the risk of damage to the instrument can be reduced, and the use of other instruments is reduced, so that the success rate of the operation is improved.
Preferably, the mesh capture mechanism 2 can be self-expanded and expanded into a mesh shape, or stretched into a long strip shape, specifically: the sleeve 3 is further arranged and sleeved on the outer sides of the mandrel 1 and the net-shaped catching mechanism 2, and the inner diameter of the sleeve 3 is larger than or equal to the diameter of the net-shaped catching mechanism 2 which is stretched into a long strip shape and is smaller than the diameter of the net-shaped catching mechanism 2 which is unfolded.
As an embodiment of the present application, the mesh capture mechanism 2 may be self-expanded and expanded into a mesh shape, or stretched into a long strip shape, specifically: the sleeve 3 is further arranged and sleeved on the outer sides of the mandrel 1 and the net-shaped catching mechanism 2, and the inner diameter of the sleeve 3 is larger than or equal to the diameter of the net-shaped catching mechanism 2 which is stretched into a long strip shape. By arranging the sleeve 3 and setting the inner diameter of the sleeve 3 to be larger than or equal to the diameter of the net-shaped capturing mechanism 2 which is stretched into a long strip shape, the sleeve 3 can extrude the net-shaped capturing mechanism 2 into a long strip shape from an unfolded net shape, and the two states of the net-shaped capturing mechanism 2 can be changed. The mandrel 1 is moved to drive the net-shaped catching mechanism 2 to move towards the direction close to the sleeve 3, at the moment, the diameter of the net-shaped catching mechanism 2 is reduced due to extrusion of the sleeve 3, the net-shaped catching mechanism 2 is stretched into a strip shape and gradually enters the sleeve 3, and in the process, the head end of the guide wire positioned in the net-shaped catching mechanism 2 is also clamped by the net-shaped catching mechanism 2 stretched into the strip shape and is taken into the sleeve 3 together. Then the sleeve 3 and the mandrel 1 move together, so that the end of the wire guide head can be brought into the guide catheter, and the guide wire and the guide catheter are smoothly butted. When the guide wire needs to be released, the mandrel 1 is fixed, the sleeve 3 is withdrawn, so that the net-shaped capturing mechanism 2 is released from the sleeve 3 and is unfolded to be net-shaped, the mandrel 1 is moved at the moment, the net-shaped capturing mechanism 2 is driven to move, and the head end of the guide wire can be released.
The sleeve 3 is arranged, the mesh-shaped capturing mechanism 2 can be switched between self-expansion and expansion into a mesh shape and stretching into a long strip shape, and the whole mesh-shaped capturing mechanism 2 and the mandrel 1 can be contained in the sleeve 3 to be conveyed in the process of conveying the mesh-shaped capturing mechanism 2 to a butt joint area with the head end of the guide wire, so that the inner wall of the blood vessel and the inner wall of the guide catheter are prevented from being damaged by the mesh-shaped capturing mechanism 2.
Preferably, one end of the mesh capture mechanism 2 away from the distal end of the mandrel is provided with a proximal connection point 21, and the proximal connection point 21 is fixedly connected with the mandrel 1.
Preferably, one end of the mesh capture mechanism 2 away from the distal end of the mandrel is provided with a proximal connection point 21, and the proximal connection point 21 is fixedly connected with the mandrel 1. In this application, distal refers to the end distal to the operator, and proximal refers to the end proximal to the operator. The mandrel 1 is moved to drive the net-shaped catching mechanism 2 to enter the sleeve 3, the near-end connecting point 21 enters the sleeve 3 first, and then the net-shaped catching mechanism 2 gradually enters the sleeve 3 and is extruded into a long strip shape. Therefore, the near-end connecting point 21 is arranged, and the near-end connecting point 21 is fixedly connected with the mandrel 1, so that the mesh-shaped capturing mechanism 2 is convenient to move, and the mandrel 1, the mesh-shaped capturing mechanism 2 and the sleeve 3 are convenient to work in a matching mode.
Preferably, the end of the mesh capture mechanism 2 away from the proximal connection point 21 is provided with a distal connection point 22, and the distal connection point 22 is axially movable along the mandrel 1.
Preferably, the mesh capture mechanism 2 may be provided with a distal connection point 22 at an end thereof remote from the proximal connection point 21, the distal connection point 22 being axially movable along the mandrel 1.
The net catching mechanism 2 may be of the open-ended and closed-ended type, as shown in fig. 2 or fig. 4 or fig. 5; or may be closed at both ends as shown in fig. 1 or fig. 3. The net catching mechanism 2 can be cylindrical, filter net, bracket or any other shape.
When the reticular capture mechanism 2 is arranged to be of a type with an open end and a closed end, the closed end is provided with the near-end connection point 21, and the open end can be provided with the far-end connection point 22 or not provided with the far-end connection point 22. When the net-shaped capturing mechanism 2 is of a two-end closed type, the closed two ends are respectively provided with a near-end connecting point 21 and a far-end connecting point 22. The near end connecting point 21 is fixedly connected with the mandrel 1, and the far end connecting point 22 can move along the axial direction of the mandrel 1, so that when the net-shaped catching mechanism 2 enters the sleeve 3 and the net-shaped catching mechanism 2 extruded by the sleeve 3 is stretched into a long strip shape, the far end connecting point 22 moves towards the direction far away from the near end connecting point 21. When the net capture mechanism 2 is released from the sleeve 3 and self-expands to a net shape, the distal connection point 22 moves closer to the proximal connection point 21. The distal connection point 22 is arranged, so that the mesh capture mechanism 2 can still keep coaxial with the mandrel 1 during the form change process, and the control is convenient.
When both the proximal 21 and distal 22 attachment points are provided, the mandrel 1 passes through the entire mesh capture mechanism 2. When only the proximal connection point 21 is provided, the mandrel 1 may pass through the entire mesh-shaped capturing mechanism 2, or may not pass through the mesh-shaped capturing mechanism 2, or the mandrel 1 extends into a partial space inside the mesh-shaped capturing mechanism 2. When the mandrel 1 does not penetrate through the net-shaped capturing mechanism 2, the near-end connecting point 21 of the net-shaped capturing mechanism 2 is fixedly connected with the top end of the mandrel 1.
Preferably, the net-shaped capturing mechanism 2 is made of a metal material with a shape memory effect or a polymer material with high elasticity, or is made of a combination of a metal material with a shape memory effect and a polymer material with high elasticity.
To realize the change between two forms of the net-shaped capturing mechanism 2 which is self-expanded and expanded into a net shape or stretched into a long strip shape, the net-shaped capturing mechanism 2 needs to be made of a material which can be self-expanded. Specifically, the net-like catching mechanism 2 is made of a metal material having a shape memory effect or a polymer material having high elasticity, or is made of a combination of a metal material having a shape memory effect and a polymer material having high elasticity. For example, the mesh capture mechanism 2 is made of nitinol. By using the self-expanding material, the net-shaped capturing mechanism 2 can be smoothly unfolded in vivo without the assistance of devices such as an air bag and the like, the structure of the device is simplified, the operation flow is simplified, and the operation time is shortened. The application provides a device is arrested to seal wire, and the radial power size, the diameter of mechanism 2 are arrested to the netted, and the rare density degree of net, decorative pattern structure all can adjust according to the clinical demand of apparatus. By adjusting the type or proportion, size or process of the materials and the like to match clinical requirements, a proper guide wire catching device is provided. For example, the deployed diameter of the mesh capture mechanism 2 is set according to the diameter of the blood vessel in the region of guidewire tip docking.
Preferably, the mesh capture mechanism 2 is made by laser cutting or by weaving.
Preferably, the mandrel 1 is made of metal or polymer material, or a combination of metal and polymer material.
The mandrel 1 may be made of metal, such as nitinol, stainless steel, etc. The mandrel 1 may also be made of a polymer material, such as polytetrafluoroethylene, polyimide, etc. The mandrel 1 may also be made of a combination of metals and polymeric materials, such as nitinol with a teflon coating.
Preferably, the mesh catching means 2 is made by laser cutting or by weaving.
Preferably, the distal end of the mandrel 1 is provided with a head sleeve 4, and the hardness of the head sleeve 4 is lower than that of the mandrel 1.
Preferably, a head sleeve 4 is disposed at the distal end of the mandrel 1, and the hardness of the head sleeve 4 is lower than that of the mandrel 1. The headgear 4 with hardness lower than that of the mandrel 1 is arranged, so that instruments are not easily scratched or blood vessels are not easily damaged in the process that the guide wire catching device provided by the application enters the blood vessels. The ferrule 4 may be made of a metal material, a polymer material, or a combination thereof and is securely attached to the distal end of the mandrel 1.
The mandrel is mainly characterized by being of a filament, rod or strip structure, has certain breaking resistance and tensile strength, is mainly used for connecting the mesh-shaped capturing mechanism 2, the head sleeve 4 and the developing mark 5, and is convenient for the expansion and stretching of the mesh-shaped capturing mechanism 2 operated in vitro. The mandrel 1 may be made of metal, such as nickel-titanium alloy, stainless steel, etc., or polymer material, such as PTFE, PI, etc., or a composite of multiple materials, such as nickel-titanium alloy with PTFE coating, etc. The mandrel 1 is preferably made of nickel titanium alloy with a PTEE coating, so that the mandrel 1 can be ensured to have certain fracture resistance and tensile strength, the surface of the mandrel 1 can be ensured to be smooth, and better trafficability is realized. In order to meet different clinical requirements, the mandrel 1 can be made of different materials in different sections, or the same material can be made into structures with different sizes,
preferably, any one or more of the mandrel 1, the mesh capture mechanism 2, and the headgear 4 are provided with a visualization marker 5.
Preferably, one or more of the mandrel 1, the net catching mechanism 2, and the head cover 4 are provided with a developing mark 5. More preferably, one or more of the mandrel 1, the net catching mechanism 2, and the head cover 4 are provided with one or more developing marks 5, respectively. Preferably, the development marks 5 are provided on both ends and the outer contour of the head cover 4 or the net-like catching mechanism 2.
Preferably, the development mark 5 is made of any one or more of gold, platinum, tantalum, tungsten, platinum iridium, or doped with BaSO4Or Bi2O3Is made of the polymer material.
The developing mark 5 has poor X-ray permeability, so that an operator can conveniently observe the position and the shape of the instrument in a human blood vessel in the operation process. Materials commonly used for preparing the development mark 5 include: metallic materials of poor X-ray transparency, e.g. gold, platinum, tantalum, tungsten, platinum-iridium, or the like, or polymeric materials doped with materials of poor X-ray transparency, e.g. doped with BaSO4、Bi2O3The polymer material of (1). The development mark 5 may be in any form of a ring, a thread, or a spring. The developing mark 5 can be connected with the mesh capturing mechanism 2, the mandrel 1 and the head sleeve 2 by any one of welding, bonding, winding and welding.
Example 1
A guidewire capture device comprising: the device comprises a mandrel 1 and a net-shaped capturing mechanism 2 fixedly connected with the mandrel 1, wherein the net-shaped capturing mechanism 2 can be expanded into a net shape or stretched into a long strip shape. The sleeve 3 is further arranged and sleeved on the outer sides of the mandrel 1 and the net-shaped catching mechanism 2, and the inner diameter of the sleeve 3 is larger than or equal to the diameter of the net-shaped catching mechanism 2 which is stretched into a long strip shape and is smaller than the diameter of the net-shaped catching mechanism 2 which is unfolded. One end, far away from the far end of the mandrel, of the mesh-shaped capturing mechanism 2 is provided with a near end connecting point 21, and the near end connecting point 21 is fixedly connected with the mandrel 1. The end of the mesh catching mechanism 2 far away from the near end connecting point 21 is provided with a far end connecting point 22, and the far end connecting point 22 can move along the axial direction of the mandrel 1.
The net-shaped capturing mechanism 2 is made of metal with shape memory effect through laser cutting.
The far end of the mandrel 1 is provided with a head sleeve 4, and the hardness of the head sleeve 4 is lower than that of the mandrel 1.
The mesh capturing mechanism 2 and the head sleeve 4 are respectively provided with a developing mark 5.
When the guide wire capturing device provided in embodiment 1 is used, the mesh capturing mechanism 2 is first stretched into a long strip shape and is then placed into the sleeve 3, the sleeve 3 and the mesh capturing mechanism 2 are sent to the guide wire head end butt joint area along the guide catheter, then the sleeve 3 is withdrawn, the mesh capturing mechanism 2 extends out of the sleeve 3, self-expands and unfolds into a mesh shape, then the guide wire is moved, the guide wire head end extends into the internal space of the mesh capturing mechanism 2, then the sleeve 3 is moved forward, the mesh capturing mechanism 2 is stretched into a long strip shape under the extrusion of the sleeve 3, the guide wire head end is compressed, the sleeve 3, the mesh capturing mechanism 2 and the mandrel 1 are withdrawn together, and the clamped guide wire head end is driven into the guide catheter, so that the guide wire and the guide catheter are butted. When the guide wire needs to be released, the guide tube 3 is withdrawn again, the reticular capture mechanism 2 extends out of the sleeve 3, self-expansion and expansion are carried out to form a reticular shape, then the mandrel 1 is withdrawn, and the guide wire can be released from the inner space of the reticular capture mechanism 2.
Example 2
The same structure as that of embodiment 1 except that the development marks 5 are provided on the mandrel 1.
Example 3
The structure is the same as that of embodiment 1, except that the mandrel 1 extends into the internal space of the net catching mechanism 2, does not pass through the net catching mechanism 2, and is not provided with the head cover 4.
Example 4
The structure is the same as that of embodiment 1, except that the distal end connecting point 22 is not provided, and the net-like catching mechanism 2 is made of a high-molecular material having high elasticity by weaving.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (7)

1. A guidewire capture device, comprising: the device comprises a mandrel (1) and a net-shaped capturing mechanism (2) fixedly connected with the mandrel (1), wherein the net-shaped capturing mechanism (2) can be expanded into a net shape by self expansion or stretched into a long strip shape; the mesh catching mechanism (2) is cylindrical, filter mesh or bracket;
the mesh catching mechanism (2) can be expanded into a mesh shape by self expansion or stretched into a long strip shape, and the method specifically comprises the following steps: the net-shaped catching device is characterized by further comprising a sleeve (3), the sleeve (3) is sleeved on the outer sides of the mandrel (1) and the net-shaped catching mechanism (2), and the inner diameter of the sleeve (3) is larger than or equal to the diameter of the net-shaped catching mechanism (2) which is stretched into a long strip shape and smaller than the diameter of the net-shaped catching mechanism (2) which is unfolded; the sleeve (3) is used for accommodating the net-shaped capturing mechanism (2) which is stretched into a long strip shape, or the net-shaped capturing mechanism (2) is extruded into a long strip shape from the unfolded net shape;
one end, far away from the far end of the mandrel, of the mesh-shaped capturing mechanism (2) is provided with a near end connecting point (21), and the near end connecting point (21) is fixedly connected with the mandrel (1); a far end connecting point (22) is arranged at one end, far away from the near end connecting point (21), of the mesh capturing mechanism (2), and the far end connecting point (22) can move along the axial direction of the mandrel (1);
the sleeve (3) is withdrawn, the net-shaped catching mechanism (2) extends out of the sleeve (3) and is self-expanded and unfolded into a net shape; the net-shaped catching mechanism is extruded into a long strip shape from an unfolding state through advancing the sleeve (3), the near-end connecting point (21) enters the sleeve (3) firstly, and then the net-shaped catching mechanism (2) gradually enters the sleeve (3) and is extruded into a long strip shape.
2. The guide wire catching device according to claim 1, wherein the net catching means (2) is made of a metal material having a shape memory effect or a polymer material having high elasticity, or a combination of a metal material having a shape memory effect and a polymer material having high elasticity.
3. A guidewire capture device according to claim 1, wherein the mesh capture mechanism (2) is laser cut or woven.
4. A guide wire capture device according to claim 1, wherein the mandrel (1) is made of metal or polymeric material, or a combination of metal and polymeric material.
5. A guide wire catching device according to claim 1 characterized by that the distal end of the mandrel (1) is provided with a headgear (4), the headgear (4) having a lower hardness than the mandrel (1).
6. A guide wire capture device according to claim 5, wherein any one or more of the mandrel (1), mesh capture means (2), headgear (4) is provided with visualization indicia (5).
7. The guidewire capture device of claim 6, wherein the visualization marker (5) is made of any one or more of gold, platinum, tantalum, tungsten, platinum iridium, or a polymeric material doped with BaSO4 or Bi2O 3.
CN201811132125.4A 2018-09-27 2018-09-27 Guide wire catching device Active CN109331321B (en)

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CN201079423Y (en) * 2007-09-29 2008-07-02 成正辉 Shaver for thrombus and embolus in blood vessel
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