Ultrasonic-knife conduction rod and ultrasonic knife

Abstract

The invention discloses an ultrasonic-knife conduction rod and an ultrasonic knife. The conduction rod comprises a near rod body, a middle rod body and a far rod body which are connected in sequence,wherein one end of the near rod body is connected with an ultrasonic transducer, and the other end of the near rod body is connected with the middle rod body; one end of the far rod body is connectedwith the middle rod body, and the other end of the far rod body is connected with a knife head; sound waves are transmitted from the end, connected with the ultrasonic transducer, of the near rod body; a bulge structure is arranged on the outer surface of the near rod body in the circumferential direction; gain steps are arranged on the outer surface of the middle rod body and / or the far rod bodyin the circumferential direction; and the ultrasonic knife comprises the conduction rod. Compared with the prior art, the ultrasonic-knife conduction rod has the advantages that the phase tolerance and amplitude of resonance can be remarkably improved, and the energy loss of the sound waves can be reduced; the impedance of the conduction rod is smaller, so that the ultrasonic knife has a more stable working state and higher-efficiency output, and the ultrasonic-knife conduction rod can be suitable for general occasions and can also be suitable for complex working environments, thereby having awide application prospect.

Description

Technical field [0001] The present invention relates to the technical field of ultrasonic scalpel. More specifically, the present invention relates to an ultrasonic knife conduction rod and an ultrasonic knife. Background technique [0002] Ultrasonic scalpel (ultrasonic scalpel) is a new type of surgical instrument. Compared with traditional electric scalpel, it has obvious advantages, such as precise cutting, hemostasis, less thermal damage, short operation time, and can be used for important organs, There is very little smoke and coking, ensuring a clear vision during the operation, no current passing through the human body, and any substantial tissue other than bone tissue can be removed. As the ultrasonic knife is used more and more, the performance requirements of the ultrasonic knife are getting higher and higher. [0003] The resonance characteristics of the ultrasonic knife vibration system, including the resonance frequency, resonance impedance and resonance amplitude, d...

AI Technical Summary

Problems solved by technology

Setting the gain step at the 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 more obvious the energy loss of the sound wave , which leads to the instability of sound wave conduction, sacrificing the phase tolerance of resonance

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