Ultrasound knife

Abstract

The invention provides an ultrasound knife for a surgical operation. The ultrasound knife in the embodiment comprises a knife bar and a knife head, wherein the knife bar comprises a knife-bar near endaway from the knife head, a knife-bar middle end and a knife-bar far end, and the knife-bar far end is connected with the knife head; a gain step is arranged at the knife-bar middle end and / or the knife-bar far end, and the distance from a first node of the knife-bar middle end to the middle-end gain step is 10% to 20% of half-wavelength; the knife head is an arc cutting knife point. The ultrasound knife has the wider frequency bandwidth, a working resonance point has lower impedance, and a knife tip has larger and more-even amplitude output.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to an ultrasonic scalpel. Background technique [0002] The ultrasonic scalpel is a new type of energy-based cleaning instrument for surgery. Compared with the traditional electric scalpel, the ultrasonic scalpel has very obvious advantages: precise cutting, hemostasis and minimal thermal damage, reducing operation time and can be used in important organs; very little smoke and coking, ensuring a clear view during the operation; An electrical current is passed through the body; can cut any substantial tissue except bone tissue. [0003] With the development of ultrasonic scalpel technology and its more and more clinical applications, manufacturers of ultrasonic scalpel instruments are also constantly optimizing the performance of ultrasonic scalpel. [0004] The resonance characteristics of the ultrasonic knife vibration system, to put it concisely, are the resonance f...

AI Technical Summary

Problems solved by technology

Setting the gain step at the first half-wavelength node increases the vibration amplitude of the input ultrasonic wave from the cutter bar, and the larger the vibration amplitude, the greater the friction between the sound wave and the solid medium during propagation, and the greater the energy loss of the sound wave. Obviously, it also leads to the instability of sound wave conduction, sacrificing the phase tolerance of resonance

Therefore, the existing structural layout not only limits the phase tolerance of the tool bar resonance, but also is not conducive to the conduction of sound waves, which consumes energy

[0006] In addition, there are also big problems in the cutter head, such as more effective amplitude output of the cutter head, thermal effect control of the cutter head, etc., which also need to be solved urgently

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