Support tube and sheath tube for interventional operation
By designing an interventional surgical support tube with multiple longitudinally elongated support parts and partition gaps, the problem of insufficient expansion force of the sheath tube in the prior art is solved, the radial and axial support force of the sheath tube is improved, and the reduction of the sheath tube is reduced. The risk of blood vessel damage.
Patent Information
- Application Number
- CN202420740188.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-10
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-04-10
AI Technical Summary
In the prior art, the sheath for interventional surgery is insufficient when the dilation force is expanded radially, resulting in damage to the blood vessels when the delivery system is intervened.
Design a support tube for interventional surgery, the pipe wall includes a plurality of support parts with longitudinal length in the axial direction, and a partition gap is provided between two adjacent support parts, and the support tube is an integral and continuous pipe material. , has good radial and axial support force.
Through the design of the support tube, the radial expansion and axial support of the sheath tube are increased, reducing the risk of damaging blood vessels when the delivery system is intervened.
Smart Images
Figure CN222487746U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of medical devices, and in particular to a support tube and a sheath tube for interventional surgery. Background Art
[0002] Minimally invasive interventional surgical treatment methods usually use a sheath to puncture the blood vessel to form a channel, and then the delivery system carrying implants such as valve prostheses is delivered through the sheath and released to a designated location in the human body.
[0003] In the prior art, it is desirable that the sheath tube forming the channel is radially expandable. When the delivery system carrying the implant passes through the sheath tube, the sheath tube radially expands, thereby squeezing the blood vessel to expand and reducing the scratching of the blood vessel by the delivery system. Utility Model Content
[0004] The technical problem to be solved by the present application is to provide a radially expandable support tube and sheath tube for interventional surgery.
[0005] In order to solve the above technical problems, this application adopts the following technical solutions:
[0006] In the first aspect, the present application provides a support tube for interventional surgery, the tube wall of the support tube includes a plurality of support portions which are longitudinally elongated in the axial direction, each of the support portions having a separation gap between the adjacent support portions; the three support portions adjacent in the circumferential direction are respectively called the first support portion, the second support portion and the third support portion, wherein the second support portion is located between the first support portion and the third support portion; the first end of the second support portion is connected to the first end of the first support portion, and is not connected to the first end of the third support portion; the second end of the second support portion is not connected to the second end of the first support portion, and is connected to the second end of the third support portion.
[0007] As an implementation manner, a plurality of first notches are arranged at intervals on one side of each of the support portions facing the adjacent support portion, and the first notches are communicated with the separation gap.
[0008] As an embodiment, the first end of the second support portion is connected to the first end of the first support portion to form a first connecting segment, and a first through hole is provided on the first connecting segment. The first through hole is connected to the separation gap, and the size of the first through hole is greater than the width of the separation gap.
[0009] As an implementation manner, a second through hole is provided in the first connecting section.
[0010] As an implementation manner, two second notches with opposite opening directions are provided on the first connecting section, and the two second notches are respectively connected to the separation gaps on the corresponding sides.
[0011] As an embodiment, the second end of the second support portion is connected to the second end of the third support portion to form a second connecting segment, and the second connecting segment is provided with a third through hole, and the third through hole is connected to the separation gap, and the size of the third through hole is greater than the width of the separation gap.
[0012] As an implementation manner, two third notches with opposite opening directions are provided on the second connecting section, and the two third notches are respectively connected to the separation gaps on the corresponding sides.
[0013] As an implementation manner, at least one fourth through hole is provided on the second connecting segment.
[0014] In a second aspect, the present application provides a sheath tube for interventional surgery, comprising the support tube for interventional surgery provided in the first aspect; an inner tube and an outer tube, wherein the support tube is located between the inner tube and the outer tube.
[0015] As an implementation mode, the support tube is a metal piece; the inner tube and the outer tube are both elastic layers.
[0016] The technical solution of this application has the following effects:
[0017] The support tube inside the sheath includes multiple longitudinal support parts, and a separation gap is provided between two adjacent support parts. When the implant passes through the sheath to expand the sheath radially, due to the presence of multiple separation gaps in the support tube, the rest of each support part except the two ends is not constrained, making the support tube easier to expand.
[0018] In addition, the three circumferentially adjacent support parts are respectively called the first support part, the second support part and the third support part, wherein the second support part is located between the first support part and the third support part; the first end of the second support part is connected to the first end of the first support part, and is not connected to the first end of the third support part; the second end of the second support part is not connected to the second end of the first support part, and is connected to the second end of the third support part, so that the support tube is an integral and continuous tube, thereby improving the axial support force and radial support force of the support tube and reducing damage to the blood vessel during intervention of the delivery system. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.
[0020] Figure 1A schematic diagram of the support tube structure provided in an embodiment of the present application;
[0021] Figure 2 This is a schematic diagram of the cross-sectional structure of the sheath tube provided in an embodiment of the present application.
[0022] Icon: 1-support part; 11-first support part; 12-second support part; 13-third support part; 2-partition gap; 3-first through hole; 4-first notch; 5-first connecting section; 6-second notch; 7-second through hole; 8-second connecting section; 9-third through hole; 10-third notch; 14-fourth through hole; 15-inner tube; 16-outer tube. DETAILED DESCRIPTION
[0023] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.
[0024] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.
[0025] On the first aspect, an embodiment of the present application provides a support tube for interventional surgery, which is a continuous, integral tube and has functions such as expandability, flexibility, radial and axial support, and self-retraction. It has strong clinical applicability, is suitable for multiple usage scenarios, and is easy to mass produce.
[0026] like Figure 1 As shown, the tube wall of the support tube includes a plurality of support portions 1 which are longitudinally elongated in the axial direction, and each support portion 1 has a separation gap 2 between adjacent support portions 1. Since each support portion 1 is provided with a separation gap 2 on both sides along the circumferential direction of the support tube, when the implant passes through the sheath to expand the sheath, each support portion 1 except for the two ends is not restrained, so that the support tube as a whole is easier to expand and the blood vessel is easier to open, thereby reducing damage to the blood vessel during intervention of the delivery system.
[0027] like Figure 1As shown, at the same time, the three circumferentially adjacent support portions 1 are respectively called the first support portion 11, the second support portion 12 and the third support portion 13, wherein the second support portion 12 is located between the first support portion 11 and the third support portion 13; the first end of the second support portion 12 is connected to the first end of the first support portion 11, and is not connected to the first end of the third support portion 13; the second end of the second support portion 12 is not connected to the second end of the first support portion 11, and is connected to the second end of the third support portion 13, so that the support tube is a continuous tube, and because the support portion 1 is a longitudinal structure, it provides axial support force to the support tube, and the support portion 1 is arranged along the circumference of the support tube, which also provides radial support force to the support tube.
[0028] like Figure 1 As shown, as an embodiment, each support portion 1 is provided with a plurality of first notches 4 at intervals on one side facing the adjacent support portion 1, and the first notches 4 are connected to the separation gap 2, thereby improving the bending performance of the support tube in a direction perpendicular to the axial direction, so as to facilitate adaptation to curved blood vessels.
[0029] Optionally, the first notch 4 is a long strip-shaped notch.
[0030] like Figure 1 As shown, as an embodiment, the first end of the second support portion 12 is connected to the first end of the first support portion 11 to form a first connecting section 5, thereby improving the stability of the support tube; a first through hole 3 is provided on the first connecting section 5, and the first through hole 3 is connected to the separation gap 2. The size of the first through hole 3 is greater than the width of the separation gap 2. When two adjacent support portions 1 expand, the stress around the first through hole 3 increases. The first through hole 3 can make the stress evenly diffuse to the support tube itself, thereby avoiding stress concentration or fracture.
[0031] Optionally, the first through hole 3 is a circular hole, and of course, it can also be a square hole or a hole of other shapes.
[0032] like Figure 1 and 2 As shown, as an embodiment, a second long through hole 7 is provided on the first connecting section 5. By providing the second through hole 7, the contact area between the inner tube 15 and the outer tube 16 is increased, which facilitates the fixed connection between the inner tube 15 and the outer tube 16 and reduces the delamination of the sheath tube.
[0033] like Figure 1 and 2As shown, as an embodiment, two second notches 6 with opposite opening directions are provided on the first connecting section 5, and the two second notches 6 are respectively connected to the separation gap 2 on the corresponding sides. By providing the second notches 6, on the one hand, the inner tube 15 and the outer tube 16 can be contacted and fixedly connected, thereby reducing the delamination of the sheath tube; on the other hand, the radial expansion force of the support portion 1 is increased, and at the same time, the support tube is easy to bend, which is convenient for cornering and reduces the restraint of the support tube when cornering.
[0034] Optionally, the second notch 6 is in the shape of an elongated strip.
[0035] like Figure 1 As shown, as an embodiment, the second end of the second support portion 12 is connected to the second end of the third support portion 13 to form a second connecting section 8, thereby improving the stability of the support tube; the second connecting section 8 is provided with a third through hole 9, which is connected to the separation gap 2, and the size of the third through hole 9 is greater than the width of the separation gap 2. When two adjacent support portions 1 expand, the stress around the third through hole 9 increases, and the third through hole 9 can make the stress evenly diffuse to the support tube itself, thereby reducing the occurrence of stress concentration or fracture.
[0036] Optionally, the third through hole 9 has the same structure as the first through hole 3 , and may be a circular hole, or a hole of other shapes.
[0037] like Figure 1 and 2 As shown, as an embodiment, two third notches 10 with opposite opening directions are provided on the second connecting section 8, and the two third notches 10 are respectively connected to the separation gap 2 on the corresponding sides. By providing the third notches 10, on the one hand, the inner tube 15 and the outer tube 16 can be contacted and fixedly connected to reduce the delamination of the sheath tube; on the other hand, the radial expansion force of the support part 1 is improved, and at the same time, the support tube is easy to bend, which is convenient for cornering and reduces the restraint of the support tube when cornering.
[0038] like Figure 1 As shown, as an embodiment, at least one fourth through hole 14 is provided on the second connecting section 8. By providing the fourth through hole 14, the contact area between the inner tube 15 and the outer tube 16 is increased, which facilitates the fixed connection between the inner tube 15 and the outer tube 16 and reduces the delamination of the sheath tube.
[0039] like Figure 2As shown, in the second aspect, the embodiment of the present application provides a sheath tube for interventional surgery, which can solve the problem of insufficient radial expansion force of the sheath tube in the prior art, thereby reducing damage to blood vessels during the intervention of the delivery system. The sheath tube includes the support tube for interventional surgery provided in the first aspect; it also includes an inner tube 15 and an outer tube 16, the support tube is located between the inner tube 15 and the outer tube 16, and the sheath tube of the embodiment of the present application is a three-layer structure, specifically the inner tube 15, the support tube and the outer tube 16 arranged in sequence from the inside to the outside. Among them, the inner tube 15 is a lubricating layer, which is in direct contact with the implant, can reduce the friction between the delivery sheath tube and the implant, and facilitate the release of the implant; the support tube is a reinforcing layer, which mainly plays a supporting role, so that the sheath tube maintains good radial and axial strength, which is conducive to the forward pushing of the sheath tube and the loading and release of the implant; the outer tube 16 is a protective layer, which is in direct contact with the blood and has good biocompatibility.
[0040] As an implementation method, the support tube is a metal part; the inner tube 15 and the outer tube 16 are both elastic layers. The inner tube 15 is a highly elastic thin film tube, and the material can be selected from thermoplastic polyurethane rubber, thermoplastic elastomer or silicone, etc. The inner tube 15 provides elastic force. Since the support tube is a cut pattern structure, the inner tube 15 is required to isolate the support tube from direct contact with blood. The inner tube 15 generally has good biocompatibility and plasticity, as well as hydrophilic coating adhesion; the support tube material can be selected from stainless steel, nickel titanium, polymer fiber, etc., and the outer tube 16 material can be selected from thermoplastic polyurethane rubber, thermoplastic elastomer, silicone, nylon, Pebax, polyethylene, etc.
[0041] The above description is only an embodiment of the present application and is not intended to limit the protection scope of the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
[0042] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.
[0043] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.
Claims
1. A support tube for interventional surgery, characterized in that: The tube wall of the support tube includes a plurality of support portions which are longitudinally elongated in the axial direction, and each of the support portions has a separation gap between the adjacent support portions; The three support portions adjacent to each other in the circumferential direction are respectively called a first support portion, a second support portion and a third support portion, wherein the second support portion is located between the first support portion and the third support portion; The first end of the second supporting portion is connected to the first end of the first supporting portion, and is not connected to the first end of the third supporting portion; The second end of the second supporting portion is not connected to the second end of the first supporting portion, and is connected to the second end of the third supporting portion.
2. The support tube for interventional surgery according to claim 1, characterized in that: A plurality of first notches are arranged at intervals on one side of each of the support portions facing the adjacent support portion, and the first notches are communicated with the separation gap.
3. The support tube for interventional surgery according to claim 1 or 2, characterized in that: The first end of the second supporting portion is connected to the first end of the first supporting portion to form a first connecting segment. The first connecting segment is provided with a first through hole, which is connected to the separation gap. The size of the first through hole is greater than the width of the separation gap.
4. The support tube for interventional surgery according to claim 3, characterized in that: The first connecting section is provided with a second through hole.
5. The support tube for interventional surgery according to claim 3, characterized in that: The first connecting section is provided with two second notches with opposite opening directions, and the two second notches are respectively connected to the separation gaps on the corresponding sides.
6. The support tube for interventional surgery according to claim 3, characterized in that: The second end of the second supporting portion is connected to the second end of the third supporting portion to form a second connecting segment. The second connecting segment is provided with a third through hole. The third through hole is connected to the separation gap. The size of the third through hole is greater than the width of the separation gap.
7. The support tube for interventional surgery according to claim 6, characterized in that: The second connecting section is provided with two third notches with opposite opening directions, and the two third notches are respectively connected with the separation gaps on the corresponding sides.
8. The support tube for interventional surgery according to claim 6, characterized in that: The second connecting section is provided with at least one fourth through hole.
9. A sheath for interventional surgery, characterized in that: A support tube for interventional surgery comprising any one of claims 1 to 8; An inner tube and an outer tube, wherein the support tube is located between the inner tube and the outer tube.
10. The sheath for interventional surgery according to claim 9, characterized in that: The support tube is a metal part; The inner tube and the outer tube are both elastic layers.