| 摘要 |
PROBLEM TO BE SOLVED: To simplify a catheter system and to attain cost-down by constituting a detector, which reacts to deionized radiation provided for a sensor, so as to detect the deionized radiation incident from the surrounding and constituting a control means so as to process a sensor signal for detecting the existence of the boil of blood. SOLUTION: Simultaneously with power for removal process, power is supplied to a piezoelectric transmitter 4 as well. Thus, ultrasonic waves are sent from the transmitter 4 to the surrounding blood. A piezoelectric detector 5 is provided for sending the sensor signal, with which the level of ultrasonic radiation reflected from near a tissue to the detector 5 is detected and further the level of this ultrasonic radiation is shown, for example, through a connection part 11 to a controller 10 along with a wire 6b. The controller 1.0 is provided with a physical interface with the connection part 11 and has an analog/digital converter usable for forming a correspondent digital signal from the sensor signal and while using this digital signal, the following processing of the controller 10 is enabled. |
