Tricuspid valve forming ring with adjustable length and angle

Abstract

The invention provides a tricuspid valve forming ring with adjustable length and angle. The tricuspid valve forming ring is composed of a cuttable part and a non-cuttable part, the non-cuttable part is composed of a rigid stent and a soft stent, the rigid stent is closely fastened to the inner wall of the soft stent, the rigid stent is divided into five sections, and the bending angle of arcs of front and rear sections can be adjusted in the force state, so that timely intraoperative adjustment is conducted to better adapt to the expansion of tricuspid annuluses of different diseases and better restore the sizes and shapes of the tricuspid annuluses, three middle sections are concentrated points of dispersed stress, and the two ends can be twisted perpendicularly to the plane of a tricuspid annulus to conform to the shape change of a heart. The tricuspid valve forming ring has the advantages of reasonable design, convenient use, strong adaptability and good myocardial compliance, and is an implantable artificial heart valve forming ring, and the problems that the forming effect is affected by inaccurate matching, inability to adjust the angle of a ring after intraoperative formingand the like due to the fact that an existing forming ring cannot consider both formability and myocardial compliance and a tricuspid annulus and the geometrical morphology of the forming ring are notmatched are solved.

Description

technical field [0001] The invention belongs to the field of implantable medical devices, in particular to an implantable artificial heart valve forming ring, in particular to a tricuspid valve forming ring with adjustable length and angle, which is a tricuspid valve forming ring in a heart valve and is Disclosed is a tricuspid annuloplasty ring whose length can be trimmed and angle can be adjusted, locally four-dimensionally fixed and two-dimensionally movable. Background technique [0002] The human heart includes four valves, namely the aortic valve, mitral valve, tricuspid valve, and pulmonary valve. The four valves are all one-way valves to ensure that blood does not flow in the wrong direction during the cardiac cycle. In the field of heart valvuloplasty, artificial valvuloplasty rings are used to repair or reconstruct diseased heart valve rings. Cases of regurgitation of sexual valves (mainly referring to mitral valve and tricuspid valve) or regurgitation caused by c...

AI Technical Summary

Problems solved by technology

The soft ring conforms to the movement of the natural valve ring in the cardiac cycle, and can change the size and shape of the valve ring with the cardiac cycle, which is more in line with the normal physiological conditions and anatomical structure compliance. The soft ring of the tricuspid valve forming ring has good compliance However, its supporting and shaping effects are slightly worse. During the follow-up, patients who use soft rings are found to be prone to recurrence and aggravation of tricuspid regurgitation.

Although the hard ring with a metal hard inner core has a stable long-term effect and can significantly reduce the incidence of reoperation, it destroys the physiological three-dimensional shape of the tricuspid valve ring and loses its periodic changes, especially the movement shape of the septal valve. It is forcibly restricted, and the suture is easy to tear off, which also has a certain damage to the function of the right ventricle

The ideal forming ring is to effectively adapt to the complex movement of the cardiac cycle while providing good support strength, to reshape the normal tricuspid annulus structure, the suture is not easy to tear off, it is easy to implant, and it can adapt to different conditions. The characteristics of the expansion of the tricuspid annulus caused by the disease, because the tricuspid annulus currently used in the market is basically designed according to the characteristics of the expansion of the tricuspid annulus caused by degeneration in European and American patients, and according to the applicant's research findings The most common lesion in Chinese with rheumatic lesions is the expansion of the tricuspid valve ring, mainly the expansion of the septal valve, which is different from the expansion of the anterior and posterior valves in the European and American population. The tricuspid annuloplasty ring designed based on Western research exists. A series of problems, the most common clinical problems are that the septal valve receives strong distortion and folds during the tricuspid valve annulus forming, which is prone to forming ring avulsion, recurrence and aggravation of tricuspid regurgitation, etc.

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