Self-expanded type filter bracket

Abstract

The invention discloses a self-expanded type filter bracket which comprises a filtering net, anchoring rods, a near-end connecting structure and a remote-end connecting structure, wherein the filtering net and the anchoring rod are made of nickel-titanium tubes which are cut and molded; the filtering net comprises a recycling slot, near-end filtering rods, anchoring rods, support rods and remote-end filtering rods; a whole vein filter bracket can be taken out conveniently through the recycling slot after implantation; the near-end filtering rods and the remote-end filtering rods are used for filtering thrombus in blood vessels; the anchoring rods are used for coaxially fixing the filter bracket in appointed positions of veins; the support rods are used for enabling the whole filter bracket to be tightly clued to the blood vessels and maintaining stability; the near-end connecting structure and the remote-end connecting structure are respectively arranged at the front end and the rear end of the filtering net; vein implantation can be carried out at different incoming parts with the combination of the connecting structures and a conveying system. The self-expanded type filter bracket has the characteristics of being novel in structure, clean in thrombus filtration, reliable in positioning and convenient in implantation and recycling, and is good in developing property and convenient in tracking and positioning judgment.

Description

technical field [0001] The invention relates to an interventional medical device, more specifically a self-expanding filter holder, which is processed by nickel-titanium shape memory alloy. Background technique [0002] At present, pulmonary embolism (pulmonary embolism) refers to the pathological and clinical state caused by the impacted material entering the pulmonary artery and its branches, blocking the blood supply to the tissue. Its etiology is extensive, including: hypercoagulable state of blood, such as caused by trauma, major surgery, childbirth, tumor, taking contraceptive pills, smoking, genetic abnormal coagulation function, etc.; injury of vein wall, such as caused by surgery, fracture, infection Caused by other conditions; blood flow is slow, such as caused by sedentary, long-distance flight, long-term lying, atrial fibrillation, etc. [0003] The current popular vena cava filters on the market have problems such as position shift after implantation, short rec...

AI Technical Summary

Problems solved by technology

[0003] The current popular vena cava filters on the market have problems such as position shift after implantation, short recovery period after implantation, unsmooth recovery, easy damage to the inner wall of the blood vessel during recovery, incomplete filtration of thrombus, and residual thrombus.

In terms of production and manufacturing, most of the traditional vena cava filters on the market adopt a double-headed cluster design, which makes the length of the nickel-titanium shape memory alloy tube required for production long, difficult to shape, and high production cost

Images