Thrombus collecting device

Abstract

The invention relates to a thrombus collecting device which is composed of an outer catheter and an inner catheter, the far end of the inner catheter is connected with a hollow marking tube through a spring connecting piece, the hollow marking tube is provided with an annular cavity, and the near end of a collecting net basket is inserted into the annular cavity of the hollow marking tube. The collection net basket can be automatically opened and tightly attached to the inner wall of the blood vessel after extending out of the outer catheter, thrombus collection is achieved, the situation that thrombus escapes during thrombus extraction can be effectively prevented, and the occurrence probability of intraoperative and postoperative complications is reduced.

Description

technical field [0001] The present disclosure relates to the field of medical devices, in particular to a thrombus collection device. Background technique [0002] The currently widely used thrombectomy stents are used in the treatment of acute ischemic stroke, such as the Solitaire stent of Medtronic or the Trevo XP stent of Stryker, which are usually used in combination with ordinary access catheters or intermediate catheters (such as ev3 company Navien catheter and Microvention’s Sofia catheter, etc.), during the thrombectomy process, the access catheter or intermediate catheter is usually located at the proximal end of the thrombus site, while the thrombus retrieval stent reaches the thrombus site with the help of a thinner microcatheter, after the stent is released in situ The thrombus is embedded through self-expansion. After the stent is fully opened, the doctor pulls the stent along the proximal direction of the blood vessel through the stent guide wire, and recovers...

AI Technical Summary

Problems solved by technology

[0002] The currently widely used thrombectomy stents are used in the treatment of acute ischemic stroke, such as the Solitaire stent of Medtronic or the Trevo XP stent of Stryker, which are usually used in combination with ordinary access catheters or intermediate catheters (such as ev3 company Navien catheter and Microvention’s Sofia catheter, etc.), during the thrombectomy process, the access catheter or intermediate catheter is usually located at the proximal end of the thrombus site, while the thrombus retrieval stent reaches the thrombus site with the help of a thinner microcatheter, after the stent is released in situ The thrombus is embedded through self-expansion. After the stent is fully opened, the doctor pulls the stent along the proximal direction of the blood vessel through the stent guide wire, and recovers the thrombus into the access catheter or intermediate catheter. During the process of pulling the thrombus, the thrombus is squeezed And the moment it enters the inner cavity of the distal end of the catheter, it is easy to be crushed and broken, and some broken thrombi are bound to escape to the proximal end outside the catheter (there is a large gap between the catheter and the inner wall of the blood vessel, and the thrombus is squeezed at the moment of extrusion). It is easy to break and escape), although in recent years there has been a proximally protected balloon guide catheter, but due to the larger outer diameter and higher hardness of the balloon guide catheter, the ability to place in the blood vessel is poor (distance from the actual thrombus The site is far away), and due to the use of the balloon guide catheter, the operation will be more complicated, and it will also increase the cost of the operation

Images