Valve clamping device with locking mechanism and valve repair system

Abstract

The invention discloses a valve clamping device with a locking mechanism and a valve repair system. The valve clamping device comprises a fixed base, one or more pairs of tong arms, a driving assemblyand a locking mechanism, wherein the tong arms are connected with the fixed base and can be opened and closed relative to the fixed base; the driving assembly comprises a driving shaft movably inserted into the fixed base, the driving shaft moves in the axial direction to drive the tong arms to be opened and closed relative to the fixed base, and a positioning part is arranged on the peripheral surface of the driving shaft; and the locking mechanism comprises a locking piece and a pushing piece, wherein the locking piece is provided with a locking hole in the axial direction, the driving shaft is inserted into a locking hole in a penetrating mode, and the pushing piece abuts against the locking piece and is obliquely arranged in the fixed base, so that the edge of the locking hole is clamped to the positioning part. According to the valve clamping device, the locking mechanism can increase friction force and mechanical meshing force between the driving shaft and the locking piece, abrasion caused by local stress of the edge of the locking hole of the locking piece is prevented, the anti-fatigue performance of the valve clamping device is improved, the locking stability is improved, and locking failure is prevented.

Description

technical field [0001] The invention relates to the field of interventional medical devices, in particular to a valve clamping device with a locking mechanism and a valve repair system. Background technique [0002] see figure 1 , the mitral valve 1 is a one-way valve located between the left atrium 2 and the left ventricle 3 of the heart. A normal and healthy mitral valve 1 can control blood flow from the left atrium 2 to the left ventricle 3 while preventing blood flow from the left ventricle 3 to the left atrium 2. The mitral valve 1 includes a pair of leaflets called an anterior leaflet 1a and a posterior leaflet 1b. The anterior lobe 1a and the posterior lobe 1b are fixed to the papillary muscle of the left ventricle 3 through the chordae 4 . Under normal circumstances, when the heart contracts, the edges of the anterior lobe 1a and the posterior lobe 1b are completely joined to prevent blood from flowing from the left ventricle 3 to the left atrium 2 . see figure...

AI Technical Summary

Problems solved by technology

However, due to the smooth structure of the surface of the drive shaft and the smooth structure of the inner surface of the through hole of the wedge-shaped element, the friction between the two is small, so the locking force is small, and the locking mechanism may wear and slip or fail, resulting in During the delivery process, the valve clip opens in advance, or accidentally opens during the clamping process of the valve leaflet, or the valve clip falls off after implantation, resulting in surgical failure or even seriously endangering the life and health of the patient

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