| 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 108 provided to a leading end of a liquid injection tube 106, and causes a marking member to be mounted at a predetermined position of a liquid injection section or the liquid injection tube 106 and captures images of the liquid injection section by cameras 150 from at least two directions at predetermined time intervals. Further, the medical apparatus detects a moving speed of the nozzle 108 by detecting a position of the marking member from the images captured, and increases a driving frequency of a piezoelectric element 112 when the moving speed of the nozzle 108 is increased or decreases the driving frequency of the piezoelectric element 112 when the moving speed of the nozzle 108 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 108. Accordingly, the medical apparatus can cut off biological tissues at a stable cut-off depth. |
