| 摘要 |
An ultrasonic endoscope has an ultrasonic probe, an observation optical system and a channel for inserting a medical instrument. A transurethral diagnostic method using the ultrasonic endoscope comprising step of inserting an insertion portion of the ultrasonic endoscope toward a target diagnostic portion through a urethral, step of starting transmission of an ultrasonic wave from the ultrasonic probe which has reached the vicinity of the target diagnostic portion and displaying at least a B-mode image of the target diagnostic portion on a screen, step of identifying a puncture position from the B-mode image displayed on the screen, and step of puncturing the puncture position identified on the screen with a medical instrument through the channel for inserting the medical instrument.
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