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Puncture device

A puncture device and component technology, which is applied in the direction of puncture needles, puncture needles, trocars, etc., can solve the problems of low sealing performance, obvious air leakage, and chronic air leakage of sealing components, so as to achieve improved sealing performance and obvious air leakage Effect

Active Publication Date: 2014-01-15
CHANGZHOU XIN NENG YUAN MEDICAL STAPLER
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The disadvantages of the above-mentioned prior art are: the sealing performance of the above-mentioned sealing assembly is low, when the intra-abdominal air pressure is greater than 4KPa, the air leakage is obvious; at the same time, when the intra-abdominal air pressure is less than 4KPa, there is also a chronic air leakage situation

Method used

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Embodiment Construction

[0043] See Fig. 1, the piercer of the present embodiment includes: a sleeve assembly 1, and the housing 2 at the top of the sleeve assembly includes: a conversion cap 2-1 and a sleeve seat 2-2 that are sealed up and down; The seat 2-2 includes: a bowl 2-20, a cylindrical body 2-21 longitudinally connected to the center of the bottom of the bowl 2-20 and integrated with the bowl 2-20, sealed and fixed on the bowl 2 The annular cover plate 2-22 of -20 top, and the stopcock 4 that is located on this bowl-shaped body 2-20 sidewall. The stopcock 4 is used to allow and prevent perfusion fluid from entering or exiting the body cavity through the barrel 2-21;

[0044] The central axis of the conversion cap 2-1 and the sleeve seat 2-2 is provided with a working channel 10 for passing through surgical instruments or puncture rods; a sealing assembly 3 is arranged on the working channel in the conversion cap 2-1, and the sealing assembly 3 top is provided with protector 6.

[0045] The...

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Abstract

The invention relates to a puncture device which is good in sealing performance. The puncture device comprises a sealing assembly, wherein the sealing assembly comprises a plurality of elastic sealing pieces arranged between a pair of rings. Each elastic sealing piece comprises a conical surface thin wall part in the shape of a circular cone and an annular part connected to the bottom of the conical surface thin wall part, wherein a fan-shaped notch is formed in the conical surface thin wall part, and the top end of the fan-shaped notch is the top end of the conical surface thin wall part. The annular parts of the elastic sealing pieces are stacked to enable the conical surface thin wall parts of the elastic sealing pieces to form a conical sealing piece, and then a surgical instrument penetrating through the sealing assembly is made to be in clearance fit with the sealing assembly in a sealing mode. A 300-340 degree circumference is arranged on the bottom of the conical surface thin wall part of each elastic sealing piece. After the surgical instrument penetrates through the sealing assembly, the lateral wall of the surgical instrument can be wrapped with the radial edges of the fan-shaped notches of the elastic sealing pieces more tightly, so that sealing performance is improved, and even when the air pressure in the enterocoelia reaches 8KPa, air leakage can not happen.

Description

technical field [0001] The invention relates to a minimally invasive surgical instrument, in particular to a sealing device for a trocar used in laparoscopic surgery. Background technique [0002] A trocar is a surgical instrument that pierces the abdominal wall and provides a passage for other surgical instruments to enter the body cavity, and belongs to a minimally invasive surgical instrument. [0003] A trocar usually includes a sleeve assembly serving as an access channel for other surgical instruments and a puncture rod penetrating through the sleeve assembly. To penetrate the skin, the epidermis of the skin is first cut with a scalpel, and then the puncture rod penetrates the skin and enters the body cavity. By applying pressure to the proximal end of the piercing rod, pushing the tip of the piercing rod through the skin until the piercer enters the body cavity, and withdrawing the piercing rod, the sleeve assembly can be used as a device for performing endoscopic su...

Claims

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Application Information

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IPC IPC(8): A61B17/34
CPCA61B17/3462A61B17/3498A61B2017/3441A61B2017/3464
Inventor 万建峰黄建设孙东明马博平曹奇
Owner CHANGZHOU XIN NENG YUAN MEDICAL STAPLER
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