CN113116619A - Implant conveying system and inner tube thereof - Google Patents
Implant conveying system and inner tube thereof Download PDFInfo
- Publication number
- CN113116619A CN113116619A CN201911422858.6A CN201911422858A CN113116619A CN 113116619 A CN113116619 A CN 113116619A CN 201911422858 A CN201911422858 A CN 201911422858A CN 113116619 A CN113116619 A CN 113116619A
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- Prior art keywords
- inner tube
- implant
- protrusion
- main body
- stent
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- 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
Abstract
The invention discloses an implant conveying system and an inner tube thereof, wherein the implant conveying system comprises a handle, an outer tube and an inner tube, the outer tube and the inner tube are both connected with the handle, and the handle controls the outer tube and the inner tube to move in the axial direction; the inner tube comprises an inner tube main body and at least one bulge part positioned outside the inner tube main body; each protruding portion comprises a plurality of protruding single bodies, one end of each protruding single body is connected with the inner tube main body, and the other end of each protruding single body extends towards the far end direction of the inner tube main body. In the implant conveying system provided by the invention, the inner tube is meshed with the implant in a single direction, so that a larger static friction force required by the release of the implant is provided, the release and positioning of the implant are accurate and stable, and the axial shortening is not generated; meanwhile, the structure can effectively reduce the friction force between the inner tube and the implant when the inner tube is retracted, and the conveying system is prevented from retracting to drive the implant to move, so that the operation is safer.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to an implant conveying system and an inner tube thereof.
Background
With the development of endoluminal techniques, the use of stents has gained widespread acceptance by radiologists, cardiologists, and surgeons, and stents and stent-grafts are devices used to support various tubular passageways within the body, including arteries, veins, airways, gastrointestinal tracts, bile ducts, and the like. The preferred method of stent placement is via the body's own passageways using a specialized delivery system for precise placement and deployment at the intended treatment site. With the smaller outer diameter of the delivery system, the surgeon may minimize the surgical incision to achieve minimally invasive procedures.
Stents are generally plastically deformable (e.g., "balloon expandable" stents) or elastically deformable (e.g., "self-expanding" stents) to return from a compressed state to a diameter in an expanded state. The stent is first mounted on the delivery system by radial compression and delivered into the body, and then controlled to release by a steering mechanism external to the delivery system, to return the stent to its functional diameter. It is now common practice to place the stent radially compressed in the annular space between two concentric catheters, the inner tube for the passage of a guide wire, when it is desired to release the stent, to pull the outer tube back relative to the inner tube, releasing the stent by relative axial displacement of the inner and outer tubes, whereupon the stent resiliently returns to the predetermined diameter.
In a specific implementation, it is also desirable to add a coaxial intermediate tube between the inner and outer tubes, the intermediate tube being located at the proximal end of the stent and in axial contact with the stent. When the outer tube is pulled back, the middle tube is kept still, so that the support is limited to be withdrawn together with the outer tube, and the support can be smoothly released. Due to the position limit, the stent is bound to be subjected to axial compression force applied to the stent by the outer tube and the middle tube during the releasing process, which usually causes the stent to be shortened and causes inaccurate positioning of the stent. Meanwhile, the release mode also requires that the stent has stronger axial rigidity in a compressed state, otherwise, the stent is seriously shortened in the release process, and even the stent is seriously damaged. As a result, the design of stents is greatly limited, and it is often necessary to add axial tie rods between stent segments to address the problem of stent axial stiffness. However, the axial connecting rods will have adverse effects on the axial fatigue and bending performance of the stent, and the overall performance of the stent is greatly reduced.
One of the methods for solving the problems is to optimize or change the stress state of the stent when the stent is released, so that the stent is changed from an axial compression state to a tension state, or the axial compression force applied to the stent in the releasing process is reduced as much as possible. The stent delivery system disclosed in the patent document 1 (publication number CN102499801A) and the stent delivery system disclosed in the patent document 2 (publication number CN104706449A) both restrict the axial displacement of the stent by a rear release mechanism at the distal end of the delivery system, so that the stent is always pulled without being shortened during the release process. However, this method is generally only suitable for systems with larger diameter of the outer tube due to the larger volume of the rear release mechanism itself, and is easy to be unstably bent during the release process due to the larger axial compression force borne by the inner tube during the release process.
In addition, the above delivery system needs to operate a plurality of parts to release the stent, and after the stent is released, an operating mechanism is also needed to release the rear release constraint at the far end, so that the delivery system has the defect of complicated and difficult release.
Disclosure of Invention
The invention aims to provide an implant conveying system and an inner tube thereof, which can ensure that the implant is accurately and stably released and positioned without axial shortening and can ensure the safe retraction of the conveying system.
The invention provides an inner tube for conveying an implant, which aims to solve the technical problem, and comprises an inner tube main body and at least one bulge part positioned on the outer side of the inner tube main body; each protruding portion comprises a plurality of protruding single bodies, one end of each protruding single body is connected with the inner tube main body, and the other end of each protruding single body extends towards the far end direction of the inner tube main body.
Preferably, the included angle between the single protruding body and the axis of the inner tube main body is 10-80 degrees.
Preferably, the material of the protruding portion is a polymer material or a metal material.
Preferably, the boss is integrally formed with the inner tube body by 3D printing or laser cutting.
Preferably, the inner tube main body is provided with a groove, the protruding part is located at the groove, one end of the protruding single body is connected with the inner tube main body in the groove, and the other end of the protruding single body extends out of the groove.
Preferably, the axial length of the single convex body is 1mm-3 mm.
Preferably, the protrusion portion includes a plurality of protrusion single bodies distributed at intervals in an axial direction and/or a circumferential direction of the inner tube main body.
Preferably, the interval distance between two adjacent convex single bodies in the axial direction of the inner pipe main body is 2mm-5 mm; the interval distance between two adjacent single bulges in the circumferential direction of the inner tube main body is 0.1mm-1.5 mm.
Preferably, the shape of the axial section of the single convex body is a quadrangle, a triangle or a trapezoid.
Preferably, the raised portion is located at the distal end of the inner tube.
Preferably, the inner tube comprises at least two of the protrusions, and the at least two protrusions are distributed at intervals along the axial direction of the inner tube main body.
The invention also provides an implant delivery system for solving the technical problems, which comprises a handle, an outer tube and the inner tube, wherein the outer tube is provided with an inner cavity which is axially communicated, the inner tube is positioned in the inner cavity and extends along the axial direction of the inner cavity, a gap for accommodating the implant is formed between the outer tube and the inner tube, the outer tube and the inner tube are both connected with the handle, and the handle controls the outer tube and the inner tube to move in the axial direction.
Preferably, the implant delivery system further comprises an implant received in the gap formed between the outer tube and the inner tube and covering at least a portion of the boss.
Compared with the prior art, the invention has the following beneficial effects: according to the implant conveying system and the inner tube thereof, the bulge part is arranged on the outer surface of the inner tube, so that the inner tube and the implant are engaged in a single direction, and therefore, a large static friction force required by the release of the implant is provided, the release and positioning of the implant are accurate and stable, and the axial shortening is not generated; meanwhile, due to the directional design of the protruding part on the inner tube, the structure can effectively reduce the friction force between the inner tube and the implant when the conveying system is retracted, and avoid the conveying system from retracting to drive the implant to move, so that the operation is safer; in addition, the invention improves the product feasibility and practicability, and the application range of the implant can comprise all arterial or venous branch stents and peripheral stents, and other applicable implants.
Drawings
FIG. 1 is a schematic diagram of the overall construction of a stent delivery system according to an embodiment of the present invention;
FIG. 2 is an enlarged partial cross-sectional view taken at A in FIG. 1;
FIG. 3 is a schematic partial cross-sectional view of an inner tube in an embodiment of the present invention;
FIG. 4 is an enlarged partial cross-sectional view of the inner tube according to an embodiment of the present invention;
FIG. 5 is an enlarged partial cross-sectional view of an inner tube according to another embodiment of the present invention;
FIG. 6 is a schematic view showing the distribution of the convex single bodies in the circumferential direction of the inner tube;
FIG. 7 is a schematic view of the angle formed by the single protrusion at B1 and the axis of the inner tube in FIG. 4;
FIG. 8 is a schematic view of the angle formed by the single protrusion at B2 and the axis of the inner tube in FIG. 5.
In the figure:
1-handle 2-outer tube 3-inner tube 4-support
11-rotary release mechanism 12-control rotary disc 13-rotary disc seat 14-one-way valve
15-infusion tube 31-bulge 32-tail end connecting piece 33-steel tube
311-raised monomer 30-inner tube body 34-groove
Detailed Description
The invention is further described below with reference to the figures and examples.
To more clearly describe the structural features of the present invention, the present invention uses "proximal", "distal" and "axial" as terms of orientation, wherein "proximal" denotes the end that is closer to the operator during the procedure; "distal" means the end away from the operator and axial means the direction in which the axis of the inner tube lies. The use of the terms "inner", "outer", "upper", "lower", "left", "right" and the like in the description of the invention is for illustrative purposes only and does not denote a single embodiment. The term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise.
In order to solve the serious problem of stent shortening in the stent releasing process, one idea is to increase the friction force between the inner tube and the stent remarkably. If the friction force between the inner tube and the bracket is large enough, the inner tube provides the axial supporting force and the axial limiting required in the releasing process when the bracket is released. As long as the axial rigidity of the inner tube is enough, the inner tube does not shrink, and the stent does not shrink or shift in the releasing process. Further, there are two main ways to increase friction: firstly, increasing positive pressure of a contact surface; and secondly, increasing the friction coefficient of the contact surface.
With respect to increasing the interface positive pressure, the positive pressure between the inner tube and the stent may be increased by compressing the stent in a thinner diameter outer tube, or increasing the outer diameter of the inner tube. However, in doing so, while the positive pressure between the stent and the inner tube is increased, the positive pressure between the outer tube and the stent is also significantly increased, resulting in an increase in the frictional force between the stent and the outer tube. If the friction force between the inner pipe and the bracket is smaller than that between the outer pipe and the bracket, the bracket still cannot be released normally.
In terms of increasing the contact surface friction coefficient, the friction between the inner tube and the stent can be increased by modifying the material of the inner tube. But this introduces a new problem. When stent release is complete, the delivery system needs to be withdrawn from the body. In the process of withdrawing, the inner tube inevitably contacts with the inner wall of the stent, and the friction coefficient of the inner tube is large, so that the stent is very easy to be withdrawn and displaced together, and the blood vessel can be damaged when the stent is serious.
If the inner tube can realize very large friction coefficient along the near end direction and very small friction coefficient along the far end direction, the problems of release and retraction can be solved simultaneously, and the requirements of the application scenes are met. However, no material with anisotropic friction coefficient is available at present. Based on the method, the invention provides a method for realizing larger difference of the friction coefficient of the surface of the inner pipe along the proximal direction and the distal direction by processing or adding a convex monomer on the surface of the inner pipe.
The implant in this embodiment is exemplified by a stent, which is made by sewing or heat-fusing a cylindrical polyester sheet or other high molecular material and a plurality of self-expandable alloy stent segments, or only comprises an alloy stent part. According to the implant conveying system and the inner tube thereof provided by the invention, the bulge part is arranged on the inner tube, so that the friction force between the stent and the inner tube is larger in the releasing process of the intravascular stent, and the axial length of the stent cannot be changed or the stent cannot be moved backwards integrally when the outer tube is withdrawn. When the support is released and the inner tube is withdrawn, the friction between the inner tube and the positioned support is small, and the support can be withdrawn safely.
Referring to fig. 1 and 2, the present embodiment provides an implant delivery system including a handle 1, an outer tube 2 and an inner tube 3, wherein the outer tube 2 has a lumen extending axially therethrough, the inner tube 3 is located in the lumen and extends axially along the lumen, and a gap for accommodating a stent 4 is formed between the outer tube 2 and the inner tube 3. The handle 1 is provided with a rotary release mechanism 11 and a rotatable control turntable 12 to control the axial movement of the outer tube 2, so as to control the release of the bracket 4; the control dial 12 is fixed on the dial seat 13. The far end of the handle 1 is provided with a perfusion tube 15 and a one-way valve 14, before the operation is started, the syringe filled with the physiological saline is connected with the one-way valve 14, the physiological saline in the syringe passes through the one-way valve 14, the perfusion tube 15, the gap between the inner tube 3 and the outer tube 2 and the bracket 4, and finally flows out from the far end of the outer tube 2, so that the air in the conveying system is completely discharged, and the formation of air embolism is avoided. The near end of the handle extends out of the steel tube 33 and the tail end connecting piece of the inner tube. The stent 4 is compressed and installed between the inner tube 3 and the outer tube 2. When releasing, the outer tube 2 is withdrawn by rotating the release mechanism 11, and the release of the stent 4 is completed. After release is complete, the delivery system is withdrawn entirely from the body by withdrawing the delivery system entirely.
The invention does not specially limit the structure of the handle 1 and the components thereof, the handle 1 can be a handle with various structures, and the invention mainly aims at the outer surface of the contact part of the inner tube 3 and the bracket 4.
FIG. 2 is an enlarged cross-sectional view of the stent area of the delivery system of FIG. 1 at A. Referring to fig. 2, the inner tube 3 includes an inner tube main body 30, and at least one protrusion 31 located outside the inner tube main body 30; each of the protrusions 31 includes a plurality of protrusion units 311, and one end of the protrusion unit 311 is connected to the inner tube main body 31 and the other end extends in a distal direction of the inner tube main body 30. Further, a boss 31 is located at the distal end of the inner tube 3. When the bracket is used, the bracket 4 is placed on and covers the convex part 31, and the convex part 31 is contacted and occluded with the inner surface of the bracket 4. Because the convex part 31 is arranged to be convex towards the single direction of the far end, in the releasing process of the bracket 4, the friction force between the bracket 4 and the inner tube 3 is large, and the axial length of the bracket 4 cannot be changed or the bracket 4 can not move towards the near end direction as the outer tube 2 is withdrawn. When the stent 4 is released and the conveying system is retracted, the friction between the inner tube 3 and the positioned stent 4 is small, and the stent can be safely retracted.
Referring to fig. 3, 4 and 5, in one embodiment, the protrusion 31 is integrally formed with the inner tube main body 30, and specifically, the inner tube 3 with the protrusion 31 can be directly printed by 3D printing; or firstly manufacturing the inner tube main body 30 with the same outer diameter, and cutting the bulge part 31 on the outer wall of the far end of the inner tube main body 30 in a laser cutting mode; or integrally formed by other precision machining techniques, the integrally formed protrusion 31 and the inner tube main body 30 are made of polymer materials or metal materials, such as nickel titanium, cobalt chromium alloy, stainless steel, etc. In other embodiments, the protrusion 31 may be fixedly connected to the outer surface of the distal end of the inner tube main body 30 by bonding, and the invention is not limited to the specific processing manner of the protrusion 31.
With continued reference to fig. 3, in one embodiment, the inner tube main body 30 is provided with a groove 34, the protrusion 31 is located at the groove 34, and the protrusion unit 311 includes a first end and a second end opposite to each other in the axial direction, the first end is connected to the inner tube main body 30 in the groove 34, and the second end protrudes from the groove 34. The vertical height of the second end from the bottom of the groove 34 in the radial direction of the inner tube body 30 is greater than the depth of the groove 34, i.e. in the projectionAt the rise 31, the outer diameter d of the inner tube 32Is larger than the maximum outer diameter d of the inner pipe main body 311. The extension length of the boss 31 in the axial direction and the radial direction of the inner tube main body 30 may be long enough to ensure that the inner tube 3 is in contact engagement with the inner surface of the holder 4 via the boss 31.
With continued reference to fig. 4 and 5, in one embodiment, the protrusion 31 is formed by arranging a plurality of protrusion units 311. The shape of the axial cross section of the protrusion single body 311 may be a triangle, a quadrangle, a trapezoid, or the like. The shape of the axial section of the protrusion single body 311 may be a right trapezoid, as shown in fig. 4; the shape of the axial cross section of the protrusion unit 311 may also be a parallelogram, as shown in fig. 5; the shape of the protrusion unit 311 is not particularly limited in the present invention. Referring to fig. 6, the protrusion 31 includes a plurality of protrusion units 311 spaced apart along the axial direction and/or the circumferential direction of the inner tube main body 30. The plurality of projection single bodies 311 are evenly distributed at equal intervals in the axial direction and the circumferential direction. The distance between two adjacent single convex bodies 311 in the axial direction can be determined according to the structural design of the stent 4, and is preferably 2mm to 5mm, and the distance between two adjacent single convex bodies 311 in the circumferential direction is preferably 0.1mm to 1.5 mm. The thickness h of the single protrusion 31 in the radial direction is preferably 0.1mm to 0.5mm, and the length of the single protrusion 31 in the axial direction is 1mm to 3 mm. Referring to fig. 7 and 8, an angle α is formed between the protrusion unit 311 and the axis of the inner tube main body 301、α2Preferably 10 to 80 degrees.
In another embodiment, the inner tube 3 includes at least two protrusions 31, at least two protrusions 31 are spaced apart from each other along the axial direction of the inner tube main body 30, or at least two protrusions 31 are spirally distributed along the axial direction of the inner tube main body 30; or distributed in any other manner.
When the outer tube 2 is withdrawn (the outer tube 2 moves leftwards in fig. 1 and 2) during the releasing process of the stent 4, the convex parts 31 on the inner tube 3 are contacted with the inner surface of the stent 4 and are mutually meshed, so that enough axial supporting force can be provided, and the axial deformation and displacement of the stent 4 can be effectively prevented. When the stent 4 is attached to the blood vessel after being released, the inner tube 3 is withdrawn (the inner tube 3 moves leftwards in fig. 1 and 2), and the contact surfaces of the convex part 31 on the inner tube 3 are not mutually occluded although the convex part is still in certain contact with the stent 4 due to the directionality, so that the friction between the inner tube 3 and the stent 4 is small, and the withdrawal of the inner tube 3 cannot cause the displacement of the stent 4 together.
The release of the stent 4 and the safe retraction of the delivery system are achieved by increasing the unidirectional friction of the inner tube 3 and the stent 4. The one-way friction increase of the inner tube 3 is achieved by the protrusions 31 on the inner tube 3.
In summary, the implant delivery system and the inner tube thereof provided by the present embodiment have at least the following advantages:
1) the inner tube is meshed with the implant in a one-way mode through the bulge arranged on the inner tube, so that a large static friction force required by the release of the implant is provided, the release and positioning of the implant are accurate and stable, and the axial shortening is not generated;
2) the lug boss replaces a claw structure in the existing release system, so that the radial size of the conveying system can be obviously reduced;
3) due to the directional design of the convex part on the inner tube, the structure can effectively reduce the friction between the inner tube and the implant when the inner tube withdraws, and avoid the displacement of the implant driven by the withdrawal of the conveying system, so that the operation is safer;
4) the invention improves the product feasibility and practicability, and the application range can include all arterial and venous branch stents and peripheral stents, and other types of applicable implants.
Although the present invention has been described with respect to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (13)
1. An inner tube for delivering an implant, the inner tube comprising an inner tube body, and at least one protrusion located outside the inner tube body; each protruding portion comprises a plurality of protruding single bodies, one end of each protruding single body is connected with the inner tube main body, and the other end of each protruding single body extends towards the far end direction of the inner tube main body.
2. The inner tube of claim 1, wherein the angle between the single protrusions and the axis of the inner tube body is between 10 degrees and 80 degrees.
3. The inner tube according to claim 1, wherein the material of the protrusion is a polymer material or a metal material.
4. The inner tube of claim 1, wherein the protrusions are integrally formed with the inner tube body by 3D printing or laser cutting.
5. The inner tube according to claim 1, wherein the inner tube body is provided with a groove, the protrusion is located at the groove, one end of the protrusion is connected with the inner tube body in the groove, and the other end of the protrusion extends out of the groove.
6. The inner tube of claim 1, wherein the axial length of the raised elements is from 1mm to 3 mm.
7. The inner tube according to claim 1, wherein the protrusion comprises a plurality of protrusion units spaced apart in an axial direction and/or a circumferential direction of the inner tube main body.
8. The inner tube according to claim 7, wherein adjacent two protrusion single bodies are spaced apart by a distance of 2mm to 5mm in an axial direction of the inner tube main body; the interval distance between two adjacent single bulges in the circumferential direction of the inner tube main body is 0.1mm-1.5 mm.
9. The inner tube of claim 6, wherein the axial cross-section of the protrusion element is quadrilateral, triangular or trapezoidal in shape.
10. The inner tube of claim 1, wherein the protrusion is located at a distal end of the inner tube.
11. The inner tube of claim 1, wherein the inner tube comprises at least two of the protrusions, the at least two protrusions being spaced apart along an axial direction of the inner tube body.
12. An implant delivery system comprising a handle, an outer tube and an inner tube according to any one of claims 1 to 11, the outer tube having an axially through lumen, the inner tube being located within and extending axially of the lumen, a gap being formed between the outer tube and the inner tube for receiving the implant, the outer tube and the inner tube both being connected to the handle, the handle controlling the movement of the outer tube and the inner tube in the axial direction.
13. The implant delivery system of claim 12, further comprising an implant received in a gap formed between the outer tube and the inner tube and covering at least a portion of the boss.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911422858.6A CN113116619A (en) | 2019-12-31 | 2019-12-31 | Implant conveying system and inner tube thereof |
| PCT/CN2020/113617 WO2021135352A1 (en) | 2019-12-31 | 2020-09-04 | Implant delivery system and inner tube thereof |
| ARP200103334A AR120647A1 (en) | 2019-12-31 | 2020-12-01 | IMPLANT INTRODUCTION SYSTEM AND IMPLANT INNER TUBE |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911422858.6A CN113116619A (en) | 2019-12-31 | 2019-12-31 | Implant conveying system and inner tube thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113116619A true CN113116619A (en) | 2021-07-16 |
Family
ID=76687246
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911422858.6A Pending CN113116619A (en) | 2019-12-31 | 2019-12-31 | Implant conveying system and inner tube thereof |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN113116619A (en) |
| AR (1) | AR120647A1 (en) |
| WO (1) | WO2021135352A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115054326A (en) * | 2022-07-26 | 2022-09-16 | 上海鸿脉医疗科技有限公司 | Rotary grinding system, rotary grinding assembly and rotary grinding head thereof |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6258099B1 (en) * | 1999-03-31 | 2001-07-10 | Scimed Life Systems, Inc. | Stent security balloon/balloon catheter |
| CA2371780C (en) * | 1999-05-20 | 2009-10-06 | Boston Scientific Limited | Stent delivery system with nested stabilizer and method of loading and using same |
| GB0309616D0 (en) * | 2003-04-28 | 2003-06-04 | Angiomed Gmbh & Co | Loading and delivery of self-expanding stents |
| US20060184225A1 (en) * | 2005-02-11 | 2006-08-17 | Medtronic Vascular, Inc. | Force distributing system for delivering a self-expanding stent |
| US10195064B2 (en) * | 2014-08-15 | 2019-02-05 | W. L. Gore & Associates, Inc. | Endoprosthesis delivery systems with improved retraction |
| US10376396B2 (en) * | 2017-01-19 | 2019-08-13 | Covidien Lp | Coupling units for medical device delivery systems |
| CN109700572B (en) * | 2018-12-29 | 2020-09-25 | 先健科技(深圳)有限公司 | A stop device that contracts for conveyer and conveyer thereof |
-
2019
- 2019-12-31 CN CN201911422858.6A patent/CN113116619A/en active Pending
-
2020
- 2020-09-04 WO PCT/CN2020/113617 patent/WO2021135352A1/en active Application Filing
- 2020-12-01 AR ARP200103334A patent/AR120647A1/en unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115054326A (en) * | 2022-07-26 | 2022-09-16 | 上海鸿脉医疗科技有限公司 | Rotary grinding system, rotary grinding assembly and rotary grinding head thereof |
| CN115054326B (en) * | 2022-07-26 | 2022-11-15 | 上海鸿脉医疗科技有限公司 | Rotary grinding system, rotary grinding assembly and rotary grinding head thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021135352A1 (en) | 2021-07-08 |
| AR120647A1 (en) | 2022-03-09 |
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