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Variable diameter cannula device with driving structure and puncture outfit

A cannula device and drive mechanism technology, applied in the directions of puncture needles, trocars, puncture needles, etc.

Active Publication Date: 2017-09-12
5R MED TECH CHENGDU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there is no trocar of this type

Method used

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  • Variable diameter cannula device with driving structure and puncture outfit
  • Variable diameter cannula device with driving structure and puncture outfit
  • Variable diameter cannula device with driving structure and puncture outfit

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Embodiment Construction

[0043] Embodiments of the present invention are disclosed herein, however, it is to be understood that the disclosed embodiments are merely exemplary of the invention, which may be practiced in various ways. Therefore, this disclosure is not to be interpreted as limiting, but merely as a basis for the claims and as a basis for teaching one skilled in the art how to use the invention.

[0044] refer to Figure 1-3 , for the convenience of expression, the side close to the operator is defined as the proximal end, and the side far away from the operator is defined as the distal end, the central axis of the cannula assembly 10 is defined as the longitudinal axis 1000, and the direction roughly parallel to the longitudinal axis is called is the axial direction, and subsequently the direction passing through the longitudinal axis 1000 and approximately perpendicular to the longitudinal axis is referred to as the transverse direction, and the direction passing through the longitudina...

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Abstract

The invention relates to a variable diameter cannula device with a driving mechanism and a puncture outfit. The variable diameter cannula device comprises a variable diameter cannula component, a lower cover plate and a lower casing, wherein the lower cover plate and the lower casing clamp and fix the variable diameter cannula component; the variable diameter cannula component comprises three split cannulas which can radially move and a film cannula packing the split cannulas; the split cannulas are arranged in a circular ring shape along a vertical shaft and form a hollow channel for surgical instruments to get in and out with the film cannula; the variable diameter cannula component further comprises the driving mechanism; and the driving mechanism drives the split cannulas to perform rectilinear motion close to or far from the vertical shaft along the radial direction. The variable diameter cannula device can realize diameter variation of a puncture cannula.

Description

technical field [0001] The invention relates to a minimally invasive surgical instrument, in particular to a trocar structure. 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, especially laparoscopic surgery, an insufflation machine is usually used to continuously infuse gas (such as carbon dioxide gas) into the patient's abdominal cavity and maintai...

Claims

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Application Information

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IPC IPC(8): A61B17/34
CPCA61B17/00234A61B17/34A61B17/3403A61B17/3421A61B17/3423A61B17/3439A61B17/3478A61B2017/3419A61B2017/0034Y02A50/30
Inventor 朱莫恕
Owner 5R MED TECH CHENGDU CO LTD
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