High-reliability puncture outfit

Abstract

The invention relates to a high reliability puncture outfit. As a mounting bracket of a retaining valve is provided with a bearing surface which is matched with the funnel surface of the retaining valve, the bearing surface of the mounting bracket clings to the funnel surface structure of the retaining valve; when a surgery instrument is in and out in the retaining valve, as the bearing surface is inosculated and matched with the shape of the funnel surface, the bearing surface can effectively regulate the shape of the funnel surface, improves the inosculating situation of the incision of the retaining valve, prevent the occurrence of the skull patch phenomenon and increases the sealing effect after the surgery instrument is extracted. In addition, as a radial sealing ring with a flexible deforming slot is specially designed in the puncture outfit, the puncture outfit of the invention also realizes the random change of the surgery instrument with the 10mm to 5mm of diameter, not only has good moving seal effect, but also the surgery instrument has small kinetic resistance.

Description

technical field [0001] The invention relates to a medical device, in particular to a puncture device used in laparoscopic minimally invasive surgery and a sealing ring used in the puncture device. Background technique [0002] In modern medicine, laparoscopic minimally invasive surgery has been more and more widely used. In order to avoid iatrogenic infection, the amount of disposable trocar (Trocar) used in laparoscopic surgery is also increasing. On the basis of performance, simplification of structure and reduction of cost have become the direction of trocar improvement. [0003] The sealing structure of the trocar in the prior art consists of a radial sealing ring and a one-way valve. Among them, there are two kinds of one-way valves, one of which is a spring pressure plate structure, which pushes the baffle plate through the spring plate to press the silicone sealing ring to form a seal. It consists of a spring leaf, a baffle, and a silicone sealing ring. The spring l...

AI Technical Summary

Problems solved by technology

The funnel-shaped silicone sealing ring widely used in disposable trocars often leaks air during clinical use, and the sealing effect is not good. The main reason is that the support wall of the funnel-shaped silicone sealing ring is deformed after repeated entry and exit of surgical instruments. , the incision at the bottom of the funnel does not fit well

[0004] In addition, the radial sealing ring of the trocar in the prior art adopts a circular structure with a central hole, and adopts a structure in which the outer edge is thick and gradually becomes thinner toward the central hole, and the outer edge is thicker and gradually thinner toward the central hole. The sealing ring is particularly prone to leakage when the surgical instrument shakes, and the dynamic sealing effect is poor

Therefore, when using the radial sealing ring of the prior art to use a 5mm surgical instrument on a 10mm trocar, it is necessary to use a conversion sheath, which brings inconvenience to the doctor's operation.

Images