Driving conversion type knot locking device

Abstract

The invention provides a driving conversion type knot locking device. The driving conversion type locking device comprises a chuck, a push rod assembly arranged outside the chuck and a transmission assembly connected to the push rod assembly, wherein the push rod assembly comprises a push rod arranged outside the chuck; the axial position of the chuck is fixed, and the chuck is elastic; in the initial state, a lock nail provided with a suture line in a penetrating mode is contained in the chuck; the part, close to the push rod, of the chuck gradually inclines outwards from the near end to the far end; the transmission assembly comprises a threaded transmission piece and a flexible inner core fixedly connected with the threaded transmission piece; the threaded transmission piece is rotationally connected with the push rod assembly; the flexible inner core rotates to drive the threaded transmission piece to rotate; and the threaded transmission piece rotates to drive the push rod assembly to move in the axial direction, so that the push rod abuts against the chuck, and the chuck is forced to press the lock nail to deform so as to lock the suture line arranged in the lock nail in a penetrating mode.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a drive conversion locking device. Background technique [0002] During the operation, it is often necessary to knot and fix the suture thread. Traditional surgical operations are performed under the condition of direct vision, and the knot is usually manually tied by the doctor. However, with the advancement of technology, various minimally invasive surgeries and interventional surgeries, such as endoscopic surgeries and transcatheter interventional surgeries, are increasingly common. These operations only need to cut a small operating window on the patient's body, so that instruments such as endoscopes or interventional catheters can be inserted into the patient's body to reach the predetermined site for treatment. In this type of operation, if it is necessary to tie or fix the sutures in the patient's body, the operator usually needs to operate outside the patient...

AI Technical Summary

Problems solved by technology

However, first of all, a thrust is directly applied to the flexible component to lock the suture. During the process of transmitting the thrust on the flexible component, the flexible component is easy to bend and fold, and the thrust will be greatly lost. The thrust cannot be effectively transmitted to the flexible component. On the rigid part at the far end of the component, the chuck cannot effectively press the locking nail, so that the suture cannot be reliably locked by the locking nail; Tightly penetrate the suture thread arranged in the inner cavity of the locking nail, when the pushing force is large, it is difficult for the flexible part in the bending state to support the rigid part located at its far end (the rigid part pushes against the chuck, prompting the chuck to extrude Locking nails, the rigid part will drive the distal part of the flexible part to tend to straighten, that is, the rigid part will swing or shake relative to the distal end of the flexible part, which will easily cause damage to the suture point. to tear

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