A bioprosthetic heart valve with reproducible valve leaflet replacement through minimally invasive surgery

Abstract

The embodiment of the present invention discloses a bio-cardiac valve that can repeatedly replace the leaflets through minimally invasive surgery, including a valve frame (1) for suturing with tissue and a replaceable valve leaflet (2), wherein the valve frame (1) It is closely connected with the replaceable valve leaflet (2) through the card slot (3) and the sealing groove (4) on the valve frame. When the patient implants the bioprosthetic heart valve through thoracotomy, and the valve leaflets have functional degradation and need to be replaced, the delivery device equipped with the new valve leaflets can be guided by the visualization equipment through minimally invasive surgery, and the bioprosthetic valve will be broken. The valve leaflets are removed by the leaflet removal device of the delivery device, and the new leaflets are opened at the same time, and the leaflets are installed on the valve holder to complete the replacement of the leaflets, and the damaged leaflets are compressed and loaded into the delivery device and withdrawn In vitro, heart valve replacement is done. The invention reduces the risk of re-opening the chest to replace the valve due to the service life of the bio-valve implanted in the body and causing huge trauma to the patient.

Description

technical field [0001] The invention relates to the technical field of medical devices, and more specifically relates to a heart biological valve which can repeatedly replace valve leaflets through minimally invasive surgery. Background technique [0002] Heart valve disease is one of the most common heart diseases in my country. At present, the most effective treatment method is valve replacement through surgery. There are two commonly used replacement devices: mechanical valve and biological valve. The replacement operation needs to be performed under cardiac arrest and extracorporeal circulation. The operation time is long, the blood loss is large, and the damage to the patient is relatively large. In recent years, foreign countries have developed interventional heart biological valves through apical puncture or femoral artery puncture for elderly patients who cannot bear the huge trauma of surgery. At present, Edwards' SAPIEN balloon-expandable aortic valve and Medtronic...

AI Technical Summary

Problems solved by technology

[0003] The above three types of heart valves have their own advantages and disadvantages: mechanical valves are durable and do not need to be replaced, but they are prone to thrombosis after implantation in patients, so they need to take anticoagulant drugs for life. Complications such as bleeding have brought many safety hazards to the health of patients

However, in the solution disclosed in this invention, the connection point between the valve frame and the leaflets is at the bottom of the valve frame and protrudes inward. When the blood passes through the valve, the protruding part will change the hemodynamic state, and at the same time, blood cells will be in contact with each other. Hemolysis resulting in the rupture of blood cells

There is no effective fixed point between the apex of the leaflet and the leaflet frame, which will cause the shape of the leaflet to be deformed during long-term operation, which will accelerate the damage of the leaflet and affect its service life

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