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Vein valve resection instrument

A venous valve and device technology, applied in the field of venous valve excision devices, can solve the problems of high retraction speed, adhesion of the valve knife, difficult access to the valve excision device, etc., to achieve the effect of ensuring effectiveness, avoiding damage, and rapid excision

Active Publication Date: 2021-07-23
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

[0003] However, because arterial blood has no valves, the great saphenous vein that does not turn over needs to be anastomosed after resection of the venous valves. Usually, venous valvulotomy is used for valve resection. At present, the common valvular knife usually enters the blood vessel along the direction of the valve, and then Reuse the back-end valvulotomy to destroy the valve to achieve the effect of ensuring smooth blood flow. The existing technical solutions include CN90207022-in situ venous valve cutter; CN201220694589-a kind of venous valve cutter; the existing technical solutions are all through The method of withdrawing the valvular knife is achieved by destroying the venous valve; the amount of venous valve resection cannot be guaranteed during the process, and the speed of withdrawal is high, which is prone to damage to the venous vessel; in addition, the traditional great saphenous vein is in a free state. If it cannot be stretched ahead of time, it will be difficult for the entire valvulectomy instrument to enter, and it will cause damage to the blood vessel without effective guidance when it is withdrawn, so the doctor needs to be very careful during the operation
[0004] In addition, after the great saphenous vein is dissociated, the venous lumen will be in a "compressed" state without perfusion. At this time, when the venous valve knife is inserted antegrade, it often causes difficulties in insertion and advancement, especially in relatively small saphenous veins. Under the circumstances; the lumen of the great saphenous vein whose valve has not been damaged lacks fluid lubrication, which leads to the adhesion of the valve knife to the vein wall, making it difficult to withdraw the valve knife. Vein graft failure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A venous valve resection device, which includes a vascular support tube 3; a resection structure 1 and a docking structure 2; the vascular support structure is a structure arranged at the initial end of a blood vessel; the front end of the resection structure 1 is a ball top structure-11, and the rear end includes a ball top Concavity, the end of the spherical top depression 12 forms a circular cutter 13; the front end of the docking structure 2 includes a spherical top protruding structure 1 21 that matches the spherical top depression 12; the rear end of the docking structure 2 is provided with a spherical top protruding structure 2 22 to ensure smooth exit; In addition, in the middle of the cutting structure 1 and the docking structure 2, the setting channel 41 of the pulling guide wire is set, wherein the setting channel 41 of the cutting structure 1 is bonded to the pulling guide wire, and the pulling guide wire does not pass through the setting channel 41 on the cut...

Embodiment 2

[0042] On the basis of Embodiment 1, add a guiding and entering structure 31 that guides the vascular support tube 3 to enter; as Figure 7 As shown, the specific setting is as follows: a guiding and entering structure 31 with a spherical top structure 311 and close to the vascular supporting tube 3 is arranged in the vascular supporting tube 3; the length of the guiding and entering structure 31 is longer than that of the vascular supporting structure, and the guiding and entering structure 31 can be Withdraw from the vascular support tube 3; when in use, combine the two, and send the vascular support tube 3 into the initial section of the blood vessel under the guidance of the guide entry structure 31, and then withdraw the guide entry structure 31; this setting is convenient and fast to insert the vascular support tube 3 Inserted into the blood vessel to facilitate subsequent operations.

Embodiment 3

[0044] On the basis of Example 2, the heparin injection channel 32 that reduces the entry resistance of the vascular support tube 3; Figure 7 As shown, the specific configuration is as follows: a heparin injection channel 32 penetrating through the guiding structure 31 is provided in the guiding structure 31 , and heparin is injected through the heparin injection channel 32 to lubricate the guiding structure 31 . The rear end of the heparin injection channel 32 is connected to an extension tube, and the extension tube is provided with a syringe or a connector 33 of the syringe pump 6, or the rear end of the guiding structure 31 is provided with a syringe connected to the heparin injection channel 32 or a connector 33 of the syringe pump 6; Connect with the syringe or syringe pump 6 with heparin, guide the heparin into the front end of the dome structure 2 311 of the structure 31 and flow and infiltrate the entire guiding structure 31 and the vascular support tube 3 .

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Abstract

Disclosed is a vein valve resection instrument. The vein valve resection instrument comprises a blood vessel supporting tube, a resection structure and a butt-joint structure; a blood vessel supporting structure is arranged at the initial end of a blood vessel; the front end of the resection structure is a first globe-roof-shaped structure, the rear end of the resection structure comprises a globe-roof-shaped recess, and the tail end of the globe-roof-shaped recess forms a circular cutter; the front end of the butt-joint structure comprises a first globe-roof-shaped protruding structure matched with the globe-roof-shaped recess; the rear end of the butt-joint structure is provided with a second globe-roof-shaped protruding structure for ensuring smooth withdrawal; in addition, a setting channel of a traction guide wire is arranged between the resection structure and the butt-joint structure in the longitudinal direction; the setting channel of the resection structure and the traction guide wire are bonded together, and the traction guide wire does not penetrate out of the setting channel in the resection structure; the traction guide wire passes through the setting channel of the butt-joint structure; the butt-joint structure performs relative sliding motion on the traction guide wire; and a front push tube which pushes the butt-joint structure to move along the traction guide wire and is arranged on the outer side of the traction guide wire is additionally arranged. The vein valve resection instrument can effectively resect and bring out the valve, and is reasonable in structure and easy to use.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and in particular relates to a venous valve resection device. Background technique [0002] Orthotopic saphenous vein bypass grafting is a surgical method for the treatment of lower extremity ischemia. It obtains the great saphenous vein, and then transplants it to the arterial vessel at the original position to anastomose with it; the orthotopic saphenous vein reported in the literature The 5-year patency rate of bypass grafting is similar to the 5-year patency rate of inverted great saphenous vein bypass grafting, and in situ great saphenous vein bypass grafting matches the corresponding arterial anastomotic caliber higher, which can be anastomosed to the pretibial , posterior tibial or even dorsalis pedis artery, etc., this kind of operation will not damage the vascular bed. [0003] However, because arterial blood has no valves, the great saphenous vein that does not turn over needs ...

Claims

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Application Information

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IPC IPC(8): A61B17/3205
CPCA61B17/3205
Inventor 陈跃鑫郑月宏
Owner PEKING UNION MEDICAL COLLEGE HOSPITAL CHINESE ACAD OF MEDICAL SCI
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