Ultrasonic scalpel center frequency dynamic adjustment method and ultrasonic scalpel

Abstract

The invention provides an ultrasonic scalpel center frequency dynamic adjustment method and an ultrasonic scalpel. The method comprises the following steps: S1, starting up and presetting bandwidth and center frequency according to attributes of an ultrasonic scalpel handle vibration system, and calculating a sweep frequency range; S2, conducting frequency sweeping to obtain initial resonant frequency of the ultrasonic scalpel handle vibration system; S3, setting the initial resonant frequency as a new center frequency to obtain a new resonant frequency range; S4, starting to work from the newcenter frequency, and carrying out resonance frequency tracking. According to the method, the optimal resonant frequency of an accessed knife bar is allowed to be inconsistent, the optimal frequencyswept by the ultrasonic scalpel can be used as the working frequency, knife bars of different types can be replaced in the using process, and each type of knife bars is allowed to play a better role.In addition, adaptability of the ultrasonic scalpel is enhanced, and the problem that frequency sweeping operation is complex and frequency sweeping design is unreasonable (the knife bars are bent orbroken) is solved.

Description

technical field [0001] The invention relates to the field of medical equipment and medical technology, in particular to a method for dynamically adjusting the center frequency of an ultrasonic knife and the ultrasonic knife. Background technique [0002] Ultrasonic scalpels with frequency tracking are more and more widely used in surgical operations, but during use, if the vertical pressure on the jaws or the longitudinal pressure on the bony blade is too large, it will cause the blade The vibration damping is too large, so that the resonant frequency rises. When the resonant frequency exceeds the frequency range of the transducer, the machine will alarm and stop working; if it needs to start working again, it needs to scan the frequency again and lock the frequency. [0003] When the ultrasonic scalpel head is stuck in the tissue, the external load impedance changes, and the frequency is out of range or the frequency is lost. The alarm will appear and stop working. At this...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a dynamic adjustment method for the center frequency of the ultrasonic knife and the ultrasonic knife to solve the defects of the existing ultrasonic knife, such as loss of frequency, damage to the knife rod, complicated operation, and failure to work normally caused by the frequency range; it also solves the problem of ultrasonic knife The adaptability of the knife to a variety of knife holders overcomes the problems of inconsistent resonance frequency and excessive vertical pressure on the jaws / excessive longitudinal pressure on the bony knife head during work, resulting in excessive vibration damping of the knife head

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