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Chuck type diameter-variable cannula device and puncture device

A cannula device, a chuck-type technology, applied in the directions of puncture needles, trocars, puncture needles, etc.

Active Publication Date: 2017-09-08
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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  • Chuck type diameter-variable cannula device and puncture device
  • Chuck type diameter-variable cannula device and puncture device
  • Chuck type diameter-variable cannula device and puncture device

Examples

Experimental program
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Embodiment Construction

[0050] 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.

[0051] refer to figure 1- 3. For the convenience of expression, the side closer to the operator is defined as the proximal end, and the side farther 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 subsequently defined. It is called the axial direction, the direction roughly perpendicular to the longitudinal axis is called the transverse direction, and the direction passing through the longitudinal axis 1000 and perpendicular to the longitudina...

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Abstract

The invention relates to a chuck type diameter-variable cannula device and a puncture device. The chuck type diameter-variable cannula device includes a diameter-variable cannula assembly, a lower cover plate and a lower shell; the lower cover plate and the lower shell clamp and fix the diameter-variable cannula assembly, the diameter-variable cannula assembly includes a first valve cannula, a second valve cannula, a third valve cannula and film cannulas wrapping the first valve cannula, the second valve cannula and the third valve cannula, the first valve cannula, the second valve cannula and the third valve cannula are arranged into a ring along the longitudinal axis, and the first valve cannula, the second valve cannula, the third valve cannula and the film cannulas form a hollow channel which allows surgical instruments in and out; the diameter-variable cannula assembly further includes a vortex drive mechanism, and the vortex drive mechanism drives the first valve cannula, the second valve cannula and the third valve cannula to do rectilinear motion in the radial direction to be close to or away from the longitudinal axis. The chuck type diameter-variable cannula device and the puncture device can achieve the change of the diameter 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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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/34
CPCA61B17/00234A61B17/3423A61B17/3439A61B17/3462A61B2017/0034
Inventor 朱莫恕
Owner 5R MED TECH CHENGDU CO LTD
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