tissue cutting instruments

Abstract

The present invention relates to a tissue cutting instrument, comprising a cutting assembly and a control device, characterized in that the cutting assembly includes a cutting part and a stretching part connected to the cutting part, and the control device includes a casing and at least a part of a an operation assembly in the casing, the operation assembly includes a guide rail, a blocking member and a slider that can slide axially relative to the guide rail, the guide rail is accommodated in the casing, and the blocking member is provided Outside the guide rail or accommodated in the inside of the guide rail, the stretching part is connected to the slider, and the sliding block slides along the axial direction of the guide rail to drive the stretching part to slide axially, thereby pulling the sliding block. Tightening the stretching portion to deform the cutting portion, the blocking member forms a blocking effect on the axial sliding of the slider. The tissue cutting instrument facilitates avoiding deformation or misalignment of the cutting assembly.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a tissue cutting instrument. Background technique [0002] This section provides background information related to the present disclosure only and is not necessarily prior art. [0003] The normal contraction and relaxation of the heart is the guarantee for the normal activities of the organism. When abnormalities in the structure or function of the heart result in impaired ventricular filling or ejection, a complex clinical syndrome called heart failure results, characterized clinically by dyspnea and fatigue (limited exercise tolerance), and Fluid retention (pulmonary congestion and peripheral edema). Heart failure is the severe and terminal stage of various heart diseases with a very high incidence and has become the most important cardiovascular disease in the world. Heart failure can be divided into diastolic heart failure and systolic heart failure. Diastoli...

AI Technical Summary

Problems solved by technology

In this method, the stent is an implant, and endothelialization will occur, and the opening of the atrial septum is easily blocked by the endothelial membrane

Therefore, both of the above treatment methods have the risk of closure of the opening, resulting in poor prognosis for patients

[0005] At present, some researchers treat diastolic heart failure by directly forming holes in the atrial septum by cutting. Some cutting instruments use coils as cutting components for cutting, and cut by tightening the coils. The wire diameter is generally small, and the coil is relatively soft. It is easy to be deformed or misplaced when it is pulled improperly, which will lead to unsmooth surgery and even cause scrapped equipment.

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