Various forms of a catheter that is sized to pass through the biopsy channel of an endoscope include an elongated catheter tube of flexible material and an ultrasonic probe carried by the catheter tube adjacent its tip. The forms include: a papillotome catheter (FIGS. 1 and 3); catheters for general...http://www.google.es/patents/US4582067?utm_source=gb-gplus-sharePatente US4582067 - Method for endoscopic blood flow detection by the use of ultrasonic energy
Method for endoscopic blood flow detection by the use of ultrasonic energy
