Patent ID: 9603617
Date: 2017-03-28
CPC Classifications: A61B

Claim:
1. A medical apparatus that ejects liquid from a nozzle provided at a distal end of a liquid ejection pipe, the medical apparatus comprising: a pulsation generating unit configured to change a capacity of a liquid chamber connected to the liquid ejection pipe according to displacement of a piezoelectric element and generate pulsation in the liquid; a liquid supplying unit configured to supply the liquid to the liquid chamber; a moving-speed detecting unit configured to detect the moving speed of the nozzle with respect to a liquid ejection target which is external to the nozzle; and a pulsation-generation control unit which controls the pulsation and which is configured to increase a driving frequency of the piezoelectric element as the detected moving speed of the nozzle increases from a first detected moving speed to a second detected moving speed.