A flexible needle puncture force measuring device

Abstract

A flexible needle puncture force measuring device, which consists of: a base, a pressure sensing device, a tension sensing device, a friction wheel type feeding mechanism, a support plate 1, a support plate 2, and a flexible needle. The pressure sensor is placed between the two guide sliders through the sensor support plate, and is used to measure the pressure between the two friction wheels during the linear feeding process of the flexible needle driven by the friction wheel; one end of the tension sensor is fixedly connected to the sensor support On the board, the other end is fixedly connected with the tail of the flexible needle, which is used to measure the equivalent pulling force driving the linear feed of the flexible needle; the two-rotation double-ended studs and the guide rod used in the friction wheel feeding mechanism can make the The two guide sliders move to the middle at the same time, and at the same time drive the friction wheel to squeeze the needle core to the middle to avoid eccentricity of the needle core.

Description

technical field [0001] The invention relates to a flexible needle puncture force measuring device, which belongs to the field of medical instruments. Background technique [0002] Minimally invasive interventional medicine is a new medical technology that has developed rapidly in recent years. It is an emerging medical method between surgery and internal medicine. Targeted puncture technology is one of the most promising medical methods. However, traditional puncture surgery uses a rigid needle, which cannot effectively control the position of the needle tip. Due to uneven force on the needle tip and tissue deformation during puncture, the needle tip deviates from the predetermined target, resulting in failure of puncture; therefore, for traditional puncture needles Foreign scholars have proposed the use of flexible needle manipulation technology. The flexible needle uses a slender needle tube, which can reduce tissue incisions, reduce discomfort, and speed up postoperative ...

AI Technical Summary

Problems solved by technology

However, the traditional puncture surgery uses a rigid needle, which cannot effectively control the position of the needle tip. Due to uneven force on the needle tip and tissue deformation during puncture, the needle tip deviates from the intended target, resulting in puncture failure; therefore, for the traditional puncture needle However, foreign scholars have proposed the use of flexible needle control technology. The flexible needle uses a slender needle tube, which can reduce tissue incision, reduce discomfort, and speed up postoperative recovery. More importantly, the flexible needle can achieve curved trajectory.

Images