| 摘要 |
PROBLEM TO BE SOLVED: To provide a medical apparatus capable of cutting off biological tissue at a stable depth irrespective of a moving speed of a nozzle.SOLUTION: A medical apparatus injects pulsed liquid from a nozzle provided to a leading end of a liquid injection tube. In this case, the medical apparatus captures images of a portion where the liquid is injected by an imaging section provided to a liquid injection section and detects a moving speed of the nozzle by analyzing the images. Further, the medical apparatus increases a driving frequency of a piezoelectric element when the moving speed is increased and decreases the driving frequency of the piezoelectric element when the moving speed is decreased. Thus, a number of times of injection of the liquid for each unit length can be caused not to vary depending upon the moving speed of the nozzle. Accordingly, the medical apparatus can cut off biological tissues at a stable cut-off depth. |
