Ultrasonic knife for flexible endoscope

Abstract

The invention discloses an ultrasonic knife for a flexible endoscope. The ultrasonic knife comprises a handle part, a protective sleeve and an ultrasonic knife head end; the front end of the handle part is connected with the tail end of the protective sleeve; the front end of the protective sleeve is connected with the ultrasonic knife head end; the ultrasonic knife head end comprises a knife head and a clamp head piece; a transducer is arranged in an inner cavity of the knife head; the knife head is fixedly connected with the transducer through a knife head connecting rod; the transducer is movably arranged in a transducer bridge frame; the transducer bridge frame is fixedly connected with the front end of the protective sleeve through a transducer bridge frame fixing device and a fixing bridge frame; and the transducer can drive the knife head to reciprocate relative to the fixing bridge frame. According to the ultrasonic knife, hard components are all concentrated at the head end of the ultrasonic knife, so that the ultrasonic knife of an ultra-short tip hard part structure is formed, the ultrasonic knife can be applied to a minimally invasive digestive endoscopic surgery guided by the flexible endoscope, and achieves tissue cutting and coagulation.

Description

technical field [0001] The invention relates to a medical instrument, in particular to an ultrasonic scalpel for a flexible endoscope. Background technique [0002] The medical ultrasonic knife can convert high-frequency electric energy into ultrasonic mechanical vibration energy, and transmit it to the knife head 1-1. At the same time, the ultrasonic energy is transmitted, so that the tissue cells in contact with the knife head 1-1 are vaporized instantly, and the protein hydrogen The bond breaks and the cells disintegrate, thereby cutting the tissue, and at the same time accomplishing the purpose of coagulation and hemostasis. [0003] Compared with high-frequency electric scalpel, ultrasonic scalpel has low thermal damage, so it is widely used in fine surgery. This is because the application of the medical ultrasonic scalpel solves the problem of surgical bleeding and greatly reduces the amount of surgical bleeding, which is a major advantage for the smooth progress of t...

AI Technical Summary

Problems solved by technology

[0004] However, the existing ultrasonic knife for surgery must use the rigid direct connection between the ultrasonic transducer 1-4 and the horn and the cutter head 1-1, and this direct connection cannot have an excessively long connection length, otherwise, the mechanical energy will be damaged due to The loss is too large to meet the requirements of tissue coagulation

Therefore, the existing ultrasonic scalpel is mainly used in minimally invasive surgery guided by rigid tube endoscope, and cannot be directly applied in digestive endoscopic surgery guided by flexible tube endoscope. Enteroscopy, duodenoscope, etc.) still mainly use high-frequency electrotome, but high-frequency electrotome has the disadvantages of large thermal damage during the operation, and it is difficult to control the cutting and coagulation effect

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