Triad trocar device and method for deep tissue puncture

Abstract

The invention provides a triad trocar device for deep tissue puncture. The triad trocar device comprises a thick puncture needle, a puncture cannula and a fine puncture needle; in the puncture process, when shallow tissue is punctured, the tips of the thick puncture needle, the puncture cannula and the fine puncture needle are aligned; when deep tissue is punctured, the puncture cannula and the fine puncture needle extend out of the first end of the thick puncture needle and pierce into the deep tissue together, then the fine puncture needle is withdrawn, and a channel is established between the deep tissue and the exterior of the body of a subject through the puncture cannula. By means of the puncturing device and method, important tissue organ damage can be reduced when the deep tissue is punctured, the sensitivity of the deep tissue during puncturing is increased, and the success rate of puncturing is improved, so that clinical prognosis is improved, and the device and method can beapplied to clinical practice such as pericardial effusion puncture drainage and subclavicular vein puncture catheterization, and have high clinical application value.

Description

technical field [0001] The present application relates to deep tissue puncture technology, in particular to a triple trocar and method for deep tissue puncture without ultrasound guidance. Background technique [0002] It is often necessary to puncture deep tissues in clinical work, such as pericardial puncture and drainage during acute cardiac tamponade, and daily subclavian vein puncture and catheterization, usually with 18G or 20G thick puncture needles (outer diameters are 1.2mm and 0.9mm) for direct puncture, and then use Seldinger technology exchange guide wire and sheath. The puncture of the coarse puncture needle into the target location such as the pericardial cavity or the vascular cavity of the subclavian vein is the first step in successful puncture. The steel needle structure of the thick puncture needle tube wall is conducive to penetrating superficial hard tissues and many surrounding bony tissues. Fixed a channel in the case of the structure. However, the e...

AI Technical Summary

Problems solved by technology

However, the existing problem is that the direct puncture of the deep tissue by the thick needle increases the direct damage of the deep tissue, especially when multiple punctures are unsuccessful, and it is possible that the penetration of the deep structure by the thick needle is not obvious during operations such as puncturing the pericardium. , directly penetrate the left / right ventricular wall, and further insert the guide wire and sheath if it is not detected in time, resulting in irreversible consequences and life-threatening

The problem is that when deep tissue is punctured, the cannula is easily squeezed and deformed by the superficial tissue, and even the tip position moves out of the pericardium or vascular cavity, resulting in puncture failure, and even the guide wire or sheath strays into the false lumen, causing adverse consequences

[0004] Ultrasound-guided puncture can see the whole process of puncture, which is equivalent to operating under direct vision, especially when the technique is skilled. However, sometimes the clinical situation is very critical, such as acute cardiac tamponade, and can only be punctured blindly to save lives against time

Catheterization through the subclavian vein is a routine clinical operation, and it is mostly performed blindly based on the experience of the operator. Only a few complicated or high-risk patients will try ultrasound-guided puncture, and it is difficult to routinely apply it on a large scale

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