Split-supported flexible needle puncture mechanism

Abstract

The invention belongs to the field of hygiene and particularly relates to a split-supported flexible needle puncture mechanism. The split-supported flexible needle puncture mechanism is applied to percutaneous puncture operations such as living tissue sampling, brachytherapy and low-temperature plasma radiofrequency ablation. The mechanism comprises a mechanism base, a planet wheel transmission mechanism and a flexible needle feeding rotating mechanism. By means of a split type support I, a split type support II and a split type support III of the flexible needle feeding rotating mechanism, a warping phenomenon of a flexible needle in a puncture process is effectively reduced, and therefore, errors in the puncture process are reduced; and a puncture direction of a needle shaft of the flexible needle is changed by changing a rotating speed ratio of a gear I to a sun gear of the planet wheel transmission mechanism, so that different arc tracks which cannot be obtained through a traditional steel needle are punctured, and a target point target is flexibly and accurately reached.

Description

technical field [0001] The invention herein belongs to the field of hygiene, and specifically relates to a flexible needle puncture mechanism supported by splits. Background technique [0002] Minimally invasive medicine is an inevitable trend in the development of surgical clinical medicine in the future. In minimally invasive interventional therapy, puncture is the oldest and most common surgical technique, and is widely used in biopsy pathological examination, local drug delivery for cancer treatment and other operations. It is an effective method for treating diseases that cannot be treated by general methods such as cancer. [0003] Different from the puncture needles used in traditional surgery, most of the human tissue is soft. When the puncture needle enters the human body, there is a high probability that the target point will be displaced due to the extrusion of muscle tissue. Due to the deflection of the puncture needle The performance is very poor, and it is al...

AI Technical Summary

Problems solved by technology

[0003] Different from the puncture needles used in traditional surgery, most of the human tissue is soft. When the puncture needle enters the human body, there is a high probability that the target point will be displaced due to the extrusion of muscle tissue. Due to the deflection of the puncture needle The performance is very poor, and it is almost impossible to bend at a large angle. It can only be punctured in a straight line along the angle when entering the human body, resulting in the failure to reach the target point, so that the patient cannot obtain the expected therapeutic effect. At the same time, because the internal structure of the human body is very complicated, many The target target is covered by a large number of bones, sensitive nerves and vital organs. The characteristics of the puncture steel needle make it impossible to avoid bones, sensitive nerves and vital organs. If you must use the puncture steel needle for treatment, it will not only increase the puncture The number of times will increase the risk of surgery

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