Medical ultrasonic surgical knife

Abstract

The invention discloses a medical ultrasonic surgical knife. The medical ultrasonic surgical knife comprises a knife bar, wherein the knife bar is provided with a connecting end, a knife point and a periodic repeating structure positioned between the knife point and the connecting end; the periodic repeating structure consists of rough structures and fine structures which are arranged alternatively; all the rough structures are the same in masses; all the fine structures are the same in masses; the distance between the gravity centers of any two adjacent rough structures differs from the distance between the gravity centers of any other two adjacent rough structures by 0.3 millimeter. When sound wave pass through the periodic repeating structures, vibration is transmitted forwards to the periodic repeating structures from a threaded segment and a connecting segment, the frequency is selected by the structures, responses are made to sound waves of required frequencies, sound waves are transmitted to a knife head in a resonant form, and sound waves of unrequired frequencies are cut off and are prevented from being transmitted to the knife head. Thus, the ultrasonic surgical knife can work at a stable frequency, and difficulty in surgical operation and non-safety are not increased due to frequency drifting.

Description

technical field [0001] The invention relates to a scalpel, in particular to a medical ultrasonic scalpel for abdominal minimally invasive surgery. Background technique [0002] At present, the existing ultrasonic scalpel system consists of a host, a foot switch, an ultrasonic transducer, a connecting cable and an ultrasonic scalpel. Among them, the host is used to generate high-frequency current, the foot switch excites the output of ultrasonic energy, the transducer and the connecting cable convert the current into ultrasonic vibration, and the vibration transmits the ultrasonic energy to the tip of the knife through the blade of the ultrasonic scalpel. Contact friction produces mechanical cutting and blood coagulation. Clinically, the ultrasonic scalpel has rapidly developed into an important means of clinical intervention in ultrasonic surgery due to its advantages such as neat incision, fast hemostasis, small thermal damage area, and less smoke generation. However, wit...

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Problems solved by technology

[0003] The problem solved by the present invention is that the existing ultrasonic scalpel does not protect the acoustic operating frequency of the ultrasonic scalpel, resulting in unstable operating frequency

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