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CN-122005154-A - Mitral valve forming ring

CN122005154ACN 122005154 ACN122005154 ACN 122005154ACN-122005154-A

Abstract

The invention discloses a mitral valve shaping ring which is used for being sutured at the position of an annulus surrounding anterior and posterior valve leaflets in a mitral valve, wherein the mitral valve shaping ring is provided with a continuous peripheral shape surrounding a central hole, comprises an anterior segment and a posterior segment which are oppositely arranged, and a pair of juncture narrowing segments positioned at the juncture of the anterior segment and the posterior segment, wherein the juncture narrowing segments are arranged in a way of protruding outwards locally in the circumferential direction of the mitral valve shaping ring, and can narrow the juncture area so as to increase the apposition area of the positions of the anterior and posterior valve leaflets at the juncture area. The mitral valve forming ring can precisely inhibit reflux in an intersection area through a differential strengthening structure, reduce residual reflux rate after operation, break single limitation of the existing product indication, realize clinical coverage of full etiology and multiple diseases, adapt to repair of various complex mitral valve lesions, optimize bionic structure design, promote biocompatibility and long-term stability after implantation, reduce postoperative complications and improve prognosis of patients.

Inventors

  • JIANG WENJIAN
  • ZHANG HONGJIA
  • LIU ZHOU
  • LIANG JIAJUN
  • LIU RUIFEI
  • ZHAO YUANFEI

Assignees

  • 首都医科大学附属北京安贞医院

Dates

Publication Date
20260512
Application Date
20260319
Priority Date
20251231

Claims (10)

  1. 1. A mitral valve shaping ring (200) for suturing in a mitral valve at a position of an annulus (11) surrounding anterior and posterior leaflets (12, 13), characterized in that the mitral valve shaping ring (200) has a continuous peripheral shape surrounding a central aperture, the mitral valve shaping ring (200) comprising oppositely disposed anterior and posterior segments (210, 220), and a pair of intersecting narrowed segments (230) at intersections of the anterior and posterior segments (210, 220), the radius of curvature of the anterior segment (210) being larger than the radius of curvature of the posterior segment (220), the intersecting narrowed segments (230) being arranged to bulge outwardly locally in a circumferential direction of the mitral valve shaping ring (200); When the mitral valve forming ring (200) is sutured on the annulus (11) of the mitral valve, the juncture narrowing section (230) is arranged corresponding to the juncture area where the front leaflet (12) and the rear leaflet (13) are connected at two sides of the annulus (11), and the juncture narrowing section (230) can narrow the juncture area so as to increase the juncture area of the front leaflet (12) and the rear leaflet (13) at the position close to the juncture area.
  2. 2. The mitral annuloplasty ring of claim 1, wherein the inner side of the interfacial constriction (230) forms a V-shaped angular zone.
  3. 3. The mitral valve shaping ring of claim 2, wherein an axial direction defining a vertex extending between the two juncture narrowing sections (230) and passing through the two included angle regions is a BB axis direction, a center point defining a line segment connecting the two included angle region vertices is an O point, an axial direction defining a direction extending between the anterior segment (210) and the posterior segment (220) perpendicular to the BB axis direction and passing through the O point is an AP axis direction, a dimension of the mitral valve shaping ring (200) in the BB axis direction is L1, a dimension of the mitral valve shaping ring (200) in the AP axis direction is L2, and 0.63-L2/L1-0.67 is satisfied.
  4. 4. A mitral annuloplasty ring according to claim 3, wherein a dimension L1 of the mitral annuloplasty ring (200) in the BB axis direction satisfies 24mm +.l1 +.40 mm.
  5. 5. The mitral valve annuloplasty ring of claim 4, wherein the dimension L1 of the mitral valve annuloplasty ring (200) in the BB axis direction and the dimension L2 in the AP axis direction can be any of the following: l1 is 24mm, L2 is 16.0mm; L1 is 26mm and L2 is 17.3mm; L1 is 28mm and L2 is 18.7mm; l1 is 30mm and L2 is 20.0mm; L1 is 32mm and L2 is 21.3mm; l1 is 34mm and L2 is 22.7mm; l1 is 36mm and L2 is 24.0mm; l1 is 38mm and L2 is 25.3mm; l1 is 40mm and L2 is 26.7mm.
  6. 6. The mitral annuloplasty ring of claim 3, wherein the juncture of the narrowed section (230) comprises a first section (231) and a second section (232) that form two sides of the angular region, respectively, the inside of the junction of the first section (231) and the second section (232) is the apex of the angular region, one end of the first section (231) is integrally connected with the anterior section (210), the other end of the second section (232) is integrally connected with the posterior section (220), and the length L3 of the first section (231) satisfies that L3 is less than or equal to 2mm and less than or equal to 6mm.
  7. 7. The mitral annuloplasty ring of claim 6, wherein a length L3 of the first segment (231) is positively correlated with a dimension L1 of the mitral annuloplasty ring (200) in the BB axis direction.
  8. 8. A mitral valve shaping ring according to claim 3, wherein in a plan view of the mitral valve shaping ring (200), the anterior segment (210) has an approximately rectilinear shape with a first preset curvature having a radius of curvature that is greater than 3 times a dimension L1 of the mitral valve shaping ring (200) in the BB axis direction, and the posterior segment (220) has an approximately elliptical arc shape with a second preset curvature having a radius of curvature that is 0.6-0.9 times the dimension of the mitral valve shaping ring (200) in the BB axis direction.
  9. 9. The mitral annuloplasty ring of claim 1, wherein the posterior segment (220) is more flexible than the anterior segment (210).
  10. 10. The mitral annuloplasty ring of claim 1, wherein when a commissure constriction (230) of the mitral annuloplasty ring (200) is sutured to a commissure region of the mitral valve, tissue of the commissure region constricts after being deformed in tension under a force of the commissure constriction (230) to maintain its own morphology, so that a spacing of portions of the anterior leaflet (12) and the posterior leaflet (13) near the commissure region constricts.

Description

Mitral valve forming ring Technical Field The invention relates to the technical field of medical equipment, in particular to an artificial mitral valve forming ring for heart valve repair, and particularly relates to an improved mitral valve forming ring capable of effectively reducing mitral valve insufficiency repair caused by regurgitation in mitral valve junction areas and adapting to various causes. Background Mitral insufficiency is a clinically high-incidence heart valve disease, and can be caused by various causes, including rheumatic heart valve disease, degenerative mitral valve disease, ischemic mitral regurgitation, functional mitral regurgitation, congenital mitral malformation, traumatic mitral valve injury, mixed valve disease and the like, wherein the rheumatic mitral valve disease is a common domestic disease type, the disease is often accompanied by expansion of an annulus, thickening contracture of valve leaflets, incomplete adhesion separation of boundary areas, and further specific regurgitation of the boundary areas is induced, and the mitral insufficiency caused by other causes also has the problems of physiological structural destruction of the annulus, poor valvular involution, enlarged boundary areas and the like, and is easy to cause obvious valve regurgitation, affect heart functions, and can cause serious complications such as heart failure, arrhythmia and the like when serious, endanger the life of patients. The main stream forming ring product for mitral valve repair at present mainly comprises traditional semi-rigid, flexible or saddle-shaped forming rings of Edwardsier, medun force, atbane (Solin) and other factories, and the product can realize the basic effect of conventional annuloplasty and improvement of leaflet coaptation, but has obvious technical defects that the existing product is mainly designed with uniform rigidity or partition of the rigidity of the conventional front and rear annuloplasty, is not subjected to specific mechanical optimization and structural reinforcement aiming at the front and outer boundary and the rear and inner boundary of the mitral valve, cannot accurately restrict abnormal separation of boundary regions of leaflets, compensates for the coaptation gap of the leaflet, has poor control effect on the reflux of the boundary regions, and is particularly suitable for patients with abnormal structure, combined boundary expansion and ischemic functional reflux with boundary displacement of the boundary regions of rheumatic mitral valve lesions, and has higher residual reflux incidence rate of boundary regions after operation, thereby influencing the long-term prognosis of operation. Based on the above, it is necessary to design a mitral valve annuloplasty ring capable of specifically solving the problem of regurgitation in the boundary area and covering all kinds of indications at the same time, and the technical problem to be solved is urgent in clinic. Disclosure of Invention Aiming at the defects existing in the prior art, the invention aims to provide the mitral valve forming ring capable of effectively reducing the reflux of the mitral valve junction area, and aims to solve the technical problems that the existing forming ring has poor control effect of the reflux of the mitral valve junction area in mitral valve repair operation, is single in applicable disease types and cannot be adapted to complex clinical cases, and the technical effects of reshaping the physiological form of the valve ring, closing the valve She Jingzhun and effectively inhibiting the reflux of the junction area are realized through specific structural optimization, so that the mitral valve forming ring is adapted to mitral valve insufficiency repair caused by various causes. In order to solve the technical problems, the technical scheme of the invention is as follows: The mitral valve shaping ring is used for being sutured at an annular position surrounding anterior and posterior valve leaflets in a mitral valve, the mitral valve shaping ring is provided with a continuous peripheral shape surrounding a central hole, the mitral valve shaping ring comprises an anterior segment and a posterior segment which are oppositely arranged, and a pair of juncture narrowing segments positioned at intersections of the anterior segment and the posterior segment, the curvature radius of the anterior segment is larger than that of the posterior segment, the juncture narrowing segments are arranged in a locally protruding outwards manner in the circumferential direction of the mitral valve shaping ring, when the mitral valve shaping ring is sutured on the annular of the mitral valve, the juncture narrowing segments are arranged at intersection areas where the two sides of the annular are connected with the anterior and posterior valve leaflets, and the juncture narrowing segments can narrow the intersection areas so as to increase the involution area of the anterior and posterior valve