Recoverable thrombus filter

Abstract

A thrombus filter able to be recovered is composed of a filtering unit consisting of a spiral metal wire matched with the inner surface of blood vessel and several metal wires arranged radically in blood vessel, and a fixing unit for fixing one ends of all the metal wires together and with a hook. It does not damage blood vessel.

Description

Technical field: [0001] The invention relates to an interventional medical device, in particular to a retrievable thrombus filter. Background technique: [0002] There are many types of existing thrombus filters, such as hexapod-shaped, tulip-shaped, mesh-shaped filters, etc. All of the above-mentioned thrombus filters use beams to achieve the purpose of positioning the thrombus filter after implantation. The structure of the anchor hook or silk anchor hook makes the filter use the sharp end of the anchor hook to penetrate the inner wall of the blood vessel and hang in the blood vessel to avoid the filter from shifting or drifting due to the flow of blood, because the end of the anchor hook is sharp It is very easy to puncture and scratch the blood vessel wall, causing blood vessel damage and damage to the adjacent tissue structure and causing a series of postoperative complications, and the long-term stimulation of the anchor hook to the blood vessel will also cause blood v...

AI Technical Summary

Problems solved by technology

[0002] There are many types of existing thrombus filters, such as hexapod-shaped, tulip-shaped, mesh-shaped filters, etc. All of the above-mentioned thrombus filters use beams to achieve the purpose of positioning the thrombus filter after implantation. The structure of the anchor hook or silk anchor hook makes the filter use the sharp end of the anchor hook to penetrate the inner wall of the blood vessel and hang in the blood vessel to avoid the filter from shifting or drifting due to the flow of blood, because the end of the anchor hook is sharp It is very easy to puncture and scratch the blood vessel wall, causing blood vessel damage and damage to the adjacent tissue structure and causing a series of postoperative complications, and the long-term stimulation of the anchor hook to the blood vessel will also cause blood vessel restenosis. ;In the process of implanting the filter, because the direction of the anchor hook is fixed, the end of the hook is easy to scratch the conveyor and cause it to be stuck, and it is difficult to accurately position when releasing, and it is difficult to control the placement of the filter. After the filter is easy to tilt, slip off and shift, once the anchor hook penetrates the blood vessel, the filter cannot be adjusted; when the filter needs to be taken out, because the anchor hook has penetrated the inner wall of the blood vessel, the filter can only be recovered in one direction. When the anchor hook is detached from the inner wall of the blood vessel during the withdrawal process, the anchor hook can easily cut the blood vessel, and even cause the blood vessel to rupture and cause massive bleeding, which is extremely dangerous

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