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Catheter reinforcing layer and catheter

A reinforcement layer and catheter technology, applied in the direction of the catheter, can solve the problems of elongated catheter and high elongation of the catheter, and achieve the effect of reducing the elongation, increasing the modulus, and improving the axial tensile capacity

Pending Publication Date: 2022-08-09
MICROPORT NEUROTECH SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a catheter reinforcement layer and a catheter to solve the problem that the catheter is axially elongated when the device is delivered in the catheter due to the high elongation rate of the existing catheter

Method used

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  • Catheter reinforcing layer and catheter
  • Catheter reinforcing layer and catheter
  • Catheter reinforcing layer and catheter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] see Figures 3a-3c , Figures 3a-3c It is a schematic structural diagram of a conduit reinforcement layer according to an embodiment of the present invention, such as Figures 3a-3c shown, see also figure 1 The catheter reinforcement layer 100 includes a braided component 110 and an axial component 120 extending from the proximal end to the distal end along the axial direction of the braided component 110 and passing through the braided component 110 as a whole. Specifically, as Figure 3a As shown, axial member 120d may be attached between the knitted component 110 and an inner layer (not shown) in a linear or helical shape from proximal to distal. or, as in Figure 3b As shown, axial component 120e may be attached between the knitted component 110 and an outer layer (not shown) in a linear or helical shape from the proximal end to the distal end. Or, as Figure 3c As shown, axial members 120f may be staggered between the inner and outer surfaces of the knitted c...

Embodiment 2

[0073] see Figure 4 , Figure 4 It is a schematic structural diagram of a conduit reinforcement layer according to another embodiment of the present invention, such as Figure 4 As shown, the axial component 120g may be disposed in the mesh of the knitted component 100 from proximal to distal, and the axial component 120g and the knitted component 110 are in the same plane. In the second embodiment, the axial component 120g may be combined with the knitted component 110 by welding, bonding, or the like, or the axial component 120d and the knitted component 110 may be woven into one body by knitting. compared to Figures 3a-3c The conduit reinforcement layer 100 is shown, Figure 4 An advantage of the illustrated conduit reinforcement layer 110 is that the outer diameter dimension of the conduit containing the conduit reinforcement layer is not increased by the presence of the axial member 120 contained in its conduit reinforcement layer.

[0074] It should be noted that, th...

Embodiment 3

[0078] see Figure 5 , Figure 5 It is a schematic structural diagram of a conduit reinforcement layer according to another embodiment of the present invention, such as Figure 5 As shown, preferably, the catheter reinforcement layer 100 includes a braided component 110 and a plurality of axial components 120h symmetrically arranged along the axial direction of the braided component 110 from the proximal end to the distal end and throughout the braided component 110 . Since the axial components 120 are arranged on the surface of the braided component 100 in a symmetrical manner, the structural stability of the catheter containing the catheter reinforcement layer can be ensured. At the same time, similar to Embodiment 1 and Embodiment 2, when the device is transported in the body of the catheter, the axial deformation of the catheter caused by the axial shear stress on the body of the catheter is avoided, thereby reducing the extension of the catheter rate, and ultimately av...

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Abstract

The invention provides a catheter reinforcing layer and a catheter, and is applied to the technical field of medical instruments. According to the catheter provided by the invention, compared with the design of a reinforcing layer of a pure woven structure in the prior art, a novel reinforcing layer structure is designed, one or more axial components are introduced into the reinforcing layer of an existing catheter, so that the axial modulus of the catheter is increased, and when an instrument is conveyed in a catheter cavity of the catheter, the axial modulus of the catheter is increased; axial deformation of the catheter due to the fact that the catheter body of the catheter is subjected to axial shear stress is avoided, namely, the axial tensile capacity of the catheter is improved, the ductility of the catheter is further reduced, and finally the risk that the catheter is axially stretched by an internal compatible instrument to cause fatigue failure is avoided.

Description

technical field [0001] The present invention relates to the technical field of medical devices, in particular to a catheter reinforcement layer and a catheter including the catheter reinforcement layer. Background technique [0002] Minimally invasive interventional surgery is supported by digital subtraction angiography (DSA) system, through the intravascular catheter delivery system, with minimal trauma to deliver implanted medical devices or therapeutic drugs to the lesion location to treat the disease. It undergoes mechanical or chemical treatment. As an important part of the delivery system, catheters have been widely used in various minimally invasive interventional treatments. At present, such interventional procedures usually use small blood vessels (such as femoral artery and radial artery) as the entrance, and the catheter is delivered to the target lesion with the help of sheath and guide wire along the blood vessel through the entrance, as other instruments (suc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M25/00
CPCA61M25/005A61M25/0054A61L29/02A61L29/04A61L29/14A61M2205/02A61M25/0012A61M25/0045A61M25/0053
Inventor 林恒刘云云寸雨曦孙莉
Owner MICROPORT NEUROTECH SHANGHAI
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