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A trocar sealing membrane with multidimensional floating folds

A technology of sealing film and puncture device, which is used in puncture needles, puncture needles, medical science and other directions, can solve the problems of increasing production costs, high mold precision requirements, and high defect rates

Active Publication Date: 2017-10-27
5R MED TECH CHENGDU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the deformation force of the "concentric rings" is usually reduced by reducing the wall thickness of the floating folds. The wall thickness of the folds in the prior art is usually 0.15-0.25mm, which leads to the mold accuracy of the product High requirements, complex molds, and high defect rate in the manufacturing process, which increases production costs
[0009] So far, there is no more effective method of reducing the radial tension when the floating part "concentric ring" is deformed

Method used

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  • A trocar sealing membrane with multidimensional floating folds
  • A trocar sealing membrane with multidimensional floating folds
  • A trocar sealing membrane with multidimensional floating folds

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] The cross-sectional shape of the radial folds 140 in Embodiment 1 is approximately U-shaped; while the cross-sectional shape of the radial folds 440 in Embodiment 4 is approximately V-shaped; Embodiment 4 and Embodiment 1 reduce the outer The radial pulling force when the floating part moves radially to the extreme position has similar effect.

[0060] It is easy for those skilled in the art to think that a reasonable rounded corner transition can avoid stress concentration or make deformation of certain regions easier. Due to the small size of the sealing film, especially the area near the sealing lip, such a small size, the shape of the sealing film looks very different with different chamfers. In order to clearly show the geometric relationship between elements, the examples described in the present invention are usually figures after the rounded corners are removed.

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Abstract

The invention relates to a piercer sealing film with multi-dimensional floating folds. The sealing membrane includes a proximal opening and a distal hole, and an outer sealing body extending from the proximal opening to the distal hole and an inner sealing body extending from the distal hole to the proximal opening. The outer seal body and the inner seal body extend to intersect to form a flange. The distal aperture is formed by a sealing lip for receiving an inserted instrument and forming a seal. The outer sealing body comprises at least one radial pleat, each radial pleat comprises at least two annular pleat walls and at least one of said annular pleat walls comprises a plurality of tangential pleats.

Description

technical field [0001] The invention relates to a minimally invasive surgical instrument, in particular to a sealing structure of a trocar. Background technique [0002] A trocar is a surgical instrument used to establish an artificial channel into a body cavity in minimally invasive surgery (especially hard tube endoscopic surgery). Usually consists of a cannula assembly and a puncture needle. Its general clinical use method is: first cut a small opening on the patient's skin, then pass the puncture needle through the cannula assembly, and then penetrate the abdominal wall through the skin opening and enter the body cavity together. Once in the body cavity, the needle is removed, leaving the cannula assembly as a channel for the instrument to enter and exit the body cavity. [0003] In rigid endoscopic surgery, it is usually necessary to establish and maintain a stable pneumoperitoneum to obtain sufficient operating space. Cannula assemblies usually consist of a cannula,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B17/34A61B17/00
CPCA61B17/00234A61B17/3417A61B17/3462A61B2017/3445A61B2017/3419A61B17/00A61B17/34A61B17/3421A61B2017/3464A61B2017/00477A61B2017/00862
Inventor 朱莫恕
Owner 5R MED TECH CHENGDU CO LTD
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