Seal ring and puncture cannula with same

A sealing ring and sleeve seat technology, applied in the field of medical devices, can solve the problems of turning out the elastic sealing cap, wearing the elastic sealing cap, affecting the use of the trocar, and achieving the effects of enhancing elasticity, prolonging service life, preventing wear and even rupture

Active Publication Date: 2014-11-05
佛山特种医用导管有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that during the use of the cannula puncturer in the prior art, the puncture cone contacts the elastic sealing cap for many times, which may easily cause wear or even rupture of the elastic sealing cap, affecting its airtightness; Pulling out the cone will easily cause the elastic sealing cap to flip out, which affects the use of the trocar

Method used

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  • Seal ring and puncture cannula with same
  • Seal ring and puncture cannula with same
  • Seal ring and puncture cannula with same

Examples

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Embodiment Construction

[0031] like Figure 1-5 Said, the sealing ring of the present invention includes a soft rubber cone ring 1, the center of the soft rubber cone ring 1 is provided with a through hole 2, and the soft rubber cone ring 1 is preferably made of a thermoplastic elastomer material In this embodiment, the soft rubber conical ring 1 is made of styrene-based thermoplastic elastomer. In other embodiments, it can also be made of thermoplastic polyurethane elastomer. The styrene-based thermoplastic elastomer and thermoplastic polyurethane elastic The entities are well known to those skilled in the art and will not be described in detail here. The sealing ring also has several hard films 3 for covering the inner wall 14 of the soft rubber conical ring, and the lower end 15 of the through hole exceeds the lower end of the hard film 3 . The hard film 3 can be a shape suitable for covering the inner wall 14 of the soft rubber conical ring, such as a triangle or a sector, and its size can be di...

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PUM

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Abstract

The invention relates to a seal ring and a puncture cannula with the same. The seal ring comprises a flexible glue tapered ring body with a through hole at the center, and further comprises a plurality of hard films covering the inner side of the flexible glue tapered ring body, wherein the lower end of the through hole extends out of the lower ends of the hard films. When in use, a puncture instrument is in contact with the hard films, and can not damage the flexible glue tapered ring body; and according to the invention, the elastic flexible glue tapered ring body is in press fit with the hard films, so that the elastic flexible glue tapered ring body can be prevented from being worn and broken due to direct the contact with the point of a puncture cone and is guaranteed to be used normally. When the puncture instrument is drawn out, the flexible glue tapered ring body can not be driven to be turned outwards and can drive the hard films to tighten up and reset inwards due to elasticity. The seal ring provided by the invention can adapt to puncture instruments with different external diameters entering cannulas.

Description

technical field [0001] The invention relates to a sealing ring, in particular to a sealing ring used on a puncture sleeve, and belongs to the technical field of medical instruments. Background technique [0002] The cannula trocar is a surgical instrument. Its main purpose is to deliver gas to the abdominal cavity to establish pneumoperitoneum after puncturing the abdominal cavity during laparoscopic surgery, and to serve as a closed channel for the endoscope and surgical instruments to enter and exit the abdominal cavity during surgery. [0003] The cannula puncturer mainly includes two parts, the cannula and the puncture instrument, and the two parts coordinate and cooperate to realize the puncture function. The elastic sealing ring is usually installed on the top of the puncture cannula, so that the puncture instrument can enter the cannula and be in close contact with the puncture instrument. During surgery, when the puncture instrument enters the sleeve placed in the a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B17/34
Inventor 姜小波蒋屏山
Owner 佛山特种医用导管有限责任公司
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