Injection partition type coaxial pipe puncture needle

Abstract

An injection partition type coaxial pipe puncture needle is provided, characterized in that the puncture needle comprises a puncture needle and a syringe outer housing (2), wherein the syringe outer housing (2) is a square barrel body. An upper cover plate (5) and a lower cover plate (8) are respectively connected with the upper and lower ends of the syringe outer housing (2) in a sealed manner. Acoaxial inner cannula (3) is arranged between the upper cover plate (5) and the lower cover plate (8). A plurality of through holes (30) are arranged on the through holes (30). The invention providesa partition type coaxial pipe puncture needle which is separated from the outside world by injecting liquid. The needle utilizes the principle of the horizontal plane, adds the angle measuring mark,can skillfully display the needle feeding angle of each direction, accurately provides the direction for the puncture needle feeding, and will greatly improve the puncture accuracy.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a novel coaxial puncture trocar that can be isolated from the outside world after injecting liquid. Background technique [0002] In recent years, with the continuous development of the medical industry in the direction of precision medicine and refined treatment, obtaining tissue through biopsy to obtain pathological evidence and genetic testing results has become the most important and powerful basis for clinical treatment. In addition, direct physical therapy (such as radio frequency, microwave, argon-helium knife, placement of radiation particles, etc.) on the lesion through puncture technology is also more and more widely used clinically. Therefore, puncture methods and puncture instruments are particularly important in puncture techniques. [0003] The piercing technique is widely used worldwide as a minimally invasive technique. The existing puncture coaxial troc...

AI Technical Summary

Problems solved by technology

[0004] Through the actual operation, it is found that when the needle core or other corresponding surgical instruments are pulled out from the cannula and the needle core or other surgical corresponding instruments are reinserted in the gap time, the coaxial sleeve is directly communicated with the outside air, which increases the The chance of infection caused by air pollution in deep puncture wounds; when puncturing near the pleural cavity (such as puncturing of lesions near the pleura or pleural lesions), the negative pressure of the pleural cavity will cause aspiration pneumothorax when the needle core is pulled out; especially When puncturing some lesions, due to the existence of the pressure difference between the inside and outside, the outside air is sucked into the vein (such as the pulmonary vein) due to negative pressure, resulting in serious complications such as air embolism and its fatal consequences.

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