Sealing assembly and trocar for trocar

Abstract

The invention relates to medical equipment, in particular to a sealing assembly for a puncture device used in minimally invasive surgery operations such as a laparoscope and a thoracoscope and the puncture device. The sealing assembly for the puncture device comprises a dynamic sealing piece, a supporting frame and a one-way valve. The dynamic sealing piece comprises a sealing piece upper part, a sealing ring and a sealing piece lower part, and the sealing piece upper part, the sealing ring and the sealing piece lower part are integrally connected. The supporting frame is a hollow cylindrical object and is provided with a transverse support and a longitudinal support, and the transverse support and the longitudinal support are integrally connected. The one-way valve is a funnel-shaped sealing ring and is provided with a sealing nozzle, a sealing ring and a reinforcing rib. The sealing nozzle is arranged at the bottom of the one-way valve and is in a linear type, the sealing ring is arranged on the top of the one-way valve, and the reinforcing rib is arranged on the funnel face of the lower portion of the one-way valve. The dynamic sealing piece, the supporting frame and the one-way valve are matched to be connected, and the dynamic sealing piece is fixedly connected with the one-way valve through the supporting frame. The sealing assembly for the puncture device is exquisite in structure, high in reliability, low in cost, good in sealing effect and good in universality.

Description

technical field [0001] The invention relates to a medical device, in particular to a sealing assembly and a puncture device used in minimally invasive surgical operations such as laparoscopy and thoracoscopic surgery. Background technique [0002] Laparoscopic 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 ensuring the performance, the structure is simplified , reduce cost, improve performance, this trend has 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. The one-way valve commonly used in disposable puncture devices is a funnel-shaped silicone sealing ring. This funnel-shaped silicone sealing ring has a straight through cut at the bottom of the funnel shape. It utilizes the contraction force of the silicone itself and th...

AI Technical Summary

Problems solved by technology

This widely used funnel-shaped silicone sealing ring often leaks air in clinical use, and the sealing effect is not good. The main reason is that after repeated in and out of the instrument, the support wall of the funnel-shaped silicone sealing ring is deformed, and the incision at the bottom of the funnel does not match. it is good

[0004] The radial sealing ring in the prior art usually adopts a ring-shaped structure with a central hole, and adopts a structure that gradually becomes thinner from the outer edge to the central hole. The sealing ring of this structure is particularly prone to damage when the surgical instrument shakes. Leakage, poor dynamic sealing effect

In addition, when a 10mm or 12mm surgical instrument is inserted into a 5mm medical silicone sealing ring, the resistance of the reciprocating movement of the surgical instrument is also large, which brings inconvenience to the doctor's operation

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.

[0005] In addition, the heads of surgical instruments have various shapes, especially surgical instruments similar to titanium clamps. When delivered to the abdominal cavity through a puncture device, the heads of the forceps are in the shape of an open V. The prior art The funnel-shaped silicone seals often cannot pass through these forceps

Another disadvantage of the V-shaped funnel-shaped silicone sealing ring is that for surgical instruments with grooves or raised steps on the head, such as ultrasonic scalpels, it is easy to get stuck when withdrawing from the surgical instrument, and the movement is not smooth

[0006] The Chinese patent with the application number 200910036990.3 - high reliability puncture device has a relatively simple structure, can maintain good airtightness when the instrument enters and exits, and can realize any replacement of surgical instruments with a diameter between 5mm and 10mm; however, In the process of clinical use, the phenomenon of radial sealing ring turning over often occurs when the surgical instrument is withdrawn, which greatly increases the resistance of the surgical instrument to withdraw and brings great inconvenience to the doctor's operation.

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