An intravascular foreign body fishing device

Abstract

An intravascular foreign body fishing device is composed of A micro-guide wire and B micro-guide wire, wherein A micro-guide wire is magnetic, B micro-guide wire has ferromagnetism but itself is non-magnetic, A micro-guide wire and B micro-guide wire The wire is matched to become a fishing device. The present invention also provides its fishing method: first, pass the A micro guide wire through the gap of the displaced foreign matter; then, pass the B micro guide wire through other gaps of the displaced foreign matter; then, make the end of the A micro guide wire attract the B micro At the end of the guide wire, the two micro guide wires are rotated at the same time, so that the displaced foreign body can be wound and looped; finally, the two micro guide wires are withdrawn at the same time, and the foreign body is pulled out from the blood vessel. The present invention is suitable for intravascular interventional operations, where surgical materials such as spring coils are displaced and fall off to block normal blood vessels. The fishing device is stable, convenient and safe for grasping foreign objects, has good operational stability, and has little damage to blood vessels, and is suitable for The tiny blood vessels that all interventional procedures can reach.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a fishing device for foreign bodies in blood vessels. The fishing device is especially suitable for the case where surgical materials such as spring coils are displaced and fall off to block normal blood vessels during intravascular interventional operations, and can be removed safely and easily. This kind of foreign body in the blood vessel can avoid the situation such as cerebral infarction caused by blood vessel blockage. Background technique [0002] Intracranial aneurysm is a common cerebrovascular disease with high mortality and disability. Currently, there are two treatment methods for intracranial aneurysms, namely, surgical clipping or endovascular embolization. After the invention of electrolytic coils in 1991, the latter has now become an important method for the treatment of intracranial aneurysms. At present, it has become the preferred treatment method for...

AI Technical Summary

Problems solved by technology

[0005] 1. The design of the micro lasso is similar to that of a lasso. After the lasso protrudes from the outer casing, the lasso ring is opened. After the target enters the lasso ring, the target can be captured by tightening the lasso ring. It is difficult to fully open the ring in the small distal intracranial blood vessels. If the displaced foreign body is densely clustered, it is difficult to be caught, and the fishing is more accidental;

[0006] 2. The micro-clamp design is mainly used to catch foreign bodies in peripheral large blood vessels, and occasionally used to catch foreign bodies in large and medium intracranial arteries, but its complicated mechanical design makes its ends stiff, which is less likely to damage fragile cerebral vessels. It is large and requires a large space to fully open, and it is also not suitable for the slender cerebral blood vessels at the end;

[0007] 3. The design principle of the spiral corkscrew-shaped catcher is similar to that of a corkscrew corkscrew. The main purpose is to catch thrombus in the artery. It can only be used in the larger internal carotid artery and proximal middle cerebral artery in the brain. The end is also relatively stiff, and it is not suitable for small distal cerebral blood vessels;

Moreover, the mechanical design of the terminal is complicated and stiff, with poor passability and requires a large space to operate. If the operation is improper, foreign objects such as coils will be pushed into smaller arteries, which will not be able to catch and cause permanent damage.

[0009] In recent years, the number of interventional aneurysm operations has increased rapidly, and the number of incidents of coils and other surgical materials falling off has gradually increased accordingly. However, from the perspective of current medical technology, there is no ideal fishing device

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