61 results about "Injury blood vessel" patented technology

An intravascular catheter for peri-vascular and / or peri-urethral tissue ablation includes multiple needles advanced through supported guide tubes which expand around a central axis to engage the interior surface of the wall of the renal artery or other vessel of a human body allowing the injection an ablative fluid for ablating tissue, and / or nerve fibers in the outer layer or deep to the outer layer of the vessel. A method of treating hypertension involves injecting an ablative fluid such as ethanol deep into zones in the wall of the renal artery such that the zones of fluid merge to form a circumferential ablation ring at a depth which ablates sympathetic nerves while minimizing injury to interior layers of the vessel wall.

The invention relates to a medical instrument, in particular to an inflatable type zero-damage blood vessel occlusion tractor which is an auxiliary operation instrument used for stopping blood and exposing operation view without damage in surgical operation. The inflatable type zero-damage blood vessel occlusion tractor comprises a blood vessel clamp pipeline comprising an upper wall and a lower wall. The upper wall is movably connected with the lower wall through a clamping groove and a lock catch which are matched with each other, an air bag is arranged on the inner wall of the upper wall, and rubber is embedded on the inner wall of the lower wall. The inflatable type zero-damage blood vessel occlusion tractor further comprises an air flow control device for controlling air amount in the air bag, and the air flow control device comprises an air inflation device, a vent pipe and an air flow controller arranged on the vent pipe. The air inflation device is a needle cylinder with a pushing handle or a hand air pump, the vent pipe is a high-temperature-resisting rubber pipe, the air flow controller is a clamp or forceps with lock catches, and the vent pipe is communicated with the air bag on the inner wall of the upper wall. The inflatable type zero-damage blood vessel occlusion tractor has the advantages of being small in size, low in weight, convenient to carry, simple and feasible in operation, strong in pertinence, and wide in practicability.

The invention discloses a multi-net-bag type thrombus-retrieving bracket, which includes a traction guide wire and a net bag unit, and the number of the net bag units from the proximal end to the distal end is at least two; The connecting ribs are connected; and each net bag unit and its corresponding connecting ribs are cut on the pipe with a laser cutting machine to obtain an integrated multi-net bag type thrombus removal bracket during manufacture. The multi-net thrombectomy system includes the above-mentioned multi-net thrombectomy bracket. The thrombectomy bracket and system of the present invention have simple body structure, laser integrated molding, and simple preparation process; multiple mesh pocket units capture thrombus to the greatest extent, and are equipped with mesh holes of different sizes and different forms of structures: large mesh penetration , converging and fixing thrombus, small mesh cuts and captures thrombus fragments; the distal covering prevents broken thrombus from escaping during the withdrawal process; the imaging structure is inside, which will not damage the vessel wall, and has good adherence, which improves the stent's ability to capture thrombus and Velocity of thrombus fragments.

The invention discloses an advanced high-twist control conduction guide wire and a preparation method thereof, which belong to the technical field of medical devices and include a guide wire body, which includes a stainless steel core wire, a hollow rope, a safety rope, an interwoven rope and TPU Containing tungsten tube, the thinnest grinding section of the stainless steel core wire is 0.009mm, and the hollow rope is set in the middle of the stainless steel core wire. The wire diameter is very thin 0.0002‑0.04mm. The safety rope is located beside the stainless steel core wire and inside the hollow rope. The safety rope is twisted from 2‑20 strands of stainless steel 304 ultra-fine wire into a strand like a twist. The interwoven rope is set on the safety wire. Rope, hollow rope, stainless steel core wire, interwoven rope is two 304 stainless steel wires coaxially interwoven and twisted into a spring shape, TPU tungsten tube is sleeved on the interwoven rope, and the inner diameter of TPU tungsten tube is 0.2‑0.4mm , the outer diameter is 0.4‑0.6mm, the thinnest on one side is 0.05mm, and contains 60% tungsten, which solves the problem that the weight of the tip of the guide wire is too hard and the blood vessels are easily damaged when entering complex CTO lesions.

The invention relates to a left ventricular volume reduction mechanism, which includes a support frame and a base connected to the support frame. The support frame is composed of a plurality of support rods, and the proximal ends of the support rods are gathered to form a gathering of the support frame. The bottom end has a distal end that is adaptively opened along the inner wall of the left ventricle in a direction away from the apex. The base includes a central end connected to the gathered bottom end, and a plurality of spirals extending from the central end toward the apex. Branches, a plurality of the spiral branches are rotationally symmetrical along the central axis of the base, and the entire body forms a trumpet shape with the opening facing the apex direction. The support frame is made of shape memory material and its surface is covered with a film. The base is made of Made of elastic material, the base adaptively fits the inner wall of the apex. The invention reduces the risk of instrument displacement and breakage, has good fatigue strength, and reduces the risk of damaging blood vessels and heart valves.

The invention discloses a stent sleeve for treating injury and bleeding in a blood vessel cavity and a preparation method thereof. The stent cover utilizes the degradability of polylactide, and uses the polylactide as a degradable basic stent to obtain a stent cover for treating intravascular injury and bleeding. A developing belt is arranged in the middle of the outer surface of the stent cover, which is convenient for determining the release position of the stent cover, and ensures that the bleeding site is covered after the stent cover is released. At the same time, the development belt is located in the middle position so that the development belt is not easy to fall off during the transportation process; the surface of the stent sleeve contains growth factors, which can slowly release the growth factors, effectively block the damaged blood vessels, and at the same time promote the tissue at the damaged site to the greatest extent. heal. The stent sleeve provided by the present invention has good biocompatibility, does not cause thrombus or inflammation after being implanted in blood vessels, is easy to operate, can be implanted without special equipment, and has high drug loading capacity, Good hemostatic effect and other advantages.