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Venous valvulotome and system thereof

A technology of venous valve and knife head, which is applied in the field of venous valve knife and its system, can solve the problems of hooking on the vein wall, difficulty, and easy adhesion, etc., and achieve the effect of reducing postoperative complications, reducing the possibility, and improving the success rate

Inactive Publication Date: 2019-01-15
PEKING UNION MEDICAL COLLEGE HOSPITAL CHINESE ACAD OF MEDICAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the operation, the venous lumen will be in a "compressed" state after the great saphenous vein is freed. It is difficult to insert or withdraw the venous valve knife antegradely into the venous lumen. Can cause vein graft graft failure

Method used

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  • Venous valvulotome and system thereof
  • Venous valvulotome and system thereof
  • Venous valvulotome and system thereof

Examples

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Embodiment 1

[0036] see Figure 2-Figure 4 As shown, the present embodiment provides a venous valve knife; figure 2 and image 3 The structural schematic diagrams of two kinds of venous valve cutters provided by the embodiment of the present invention are shown in cross-sectional view in the figure; Figure 4 Schematic diagram of the structure of the cutter head of the venous valve knife provided by the embodiment of the present invention, Figure 4 The presented view can also be understood as figure 2 and image 3 view in the left view direction.

[0037] The venous valve knife provided in this embodiment is used for destroying venous valves, especially for destroying saphenous vein valves, and can be applied to in situ great saphenous vein bypass grafting.

[0038] figure 1 It is a schematic diagram of the structure of the existing venous valve; the venous valve is a valve that prevents blood backflow in the vein, figure 1 The direction of the arrow shown in is the direction of ...

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Abstract

The invention relates to the technical field of medical devices, in particular to a venous valvulotome and a system thereof. The venous valvulotome comprises a pushing rod and a cutter head. The pushing rod has a proximal end and a distal end along its own axial direction. The proximal end of the pushing rod is connected with the distal end of the cutter head. The distal end of the pushing rod isprovided with an operating part. The proximal end of the cutter head is conical. Along the axial direction of the pushing rod, the pushing rod is provided with a liquid injection chamber. The proximalliquid injection opening of the liquid injection chamber is arranged on the conical surface of the cutter head, and the distal end of the liquid injection chamber can be communicated with the liquidinjection instrument. The system comprises an injection device and the venous valvulotome. The liquid injection device is in communication with the liquid injection cavity of the venous valvulotome. It is an object of the present invention to provide a venous valvulotome and a system thereof to facilitate insertion or withdrawal of the venous valvulotome into a venous lumen.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a venous valve knife and a system thereof. Background technique [0002] Orthotopic saphenous vein bypass grafting is a surgical method for lower extremity ischemia, which can effectively improve or eliminate lower extremity ischemia; it has been reported in the literature that the 5-year patency rate of in situ great saphenous vein bypass The 5-year patency rates were similar for saphenous vein bypass grafting. Orthotopic saphenous vein bypass grafting has the matching caliber of artery anastomosis, and can be anastomosed to pretibial, posterior tibial and even dorsalis pedis arteries; great saphenous vein utilization rate is high, and in situ saphenous vein bypass grafting does not damage blood vessels The bed is not easy to cause vein twisting and twisting and other advantages. [0003] The venous valve knife is a key device used to destroy the great saphenous vein v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/3211A61B17/34
CPCA61B17/3211A61B17/3415A61B2017/0046
Inventor 陈跃鑫孙蕊
Owner PEKING UNION MEDICAL COLLEGE HOSPITAL CHINESE ACAD OF MEDICAL SCI
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