ULTRASOUND ENDOSCOPE, LIQUID FEEDING APPARATUS FOR ULTRASOUND ENDOSCOPE AND ULTRASOUND ENDOSCOPE SYSTEM

摘要

For providing an, ultrasound endoscope capable of obtaining a favorable elastography image by a simple configuration without upsizing a distal end portion, an ultrasound endoscope is configured having an ultrasound probe arranged at a distal end rigid portion, an auxiliary water feeding channel opening through which fluid is ejected from a vicinity of the ultrasound probe in a projecting direction of the ultrasound probe, an auxiliary water feeding channel communicating with the auxiliary water feeding channel opening, and an adjustment valve for variably adjusting a flow rate of the fluid flowing through the auxiliary water feeding channel among two or more states.

主权项

1. An ultrasound endoscope comprising:
a long and flexible insertion portion configured to be inserted into a subject; a distal end portion arranged at a distal end of the insertion portion; an ultrasound observation portion arranged at the distal end portion; an opening portion enabling fluid to be ejected from a vicinity of the ultrasound observation portion in a projecting direction of the ultrasound observation portion so that living tissue is pressed; a fluid conduit communicating with the opening portion; and a first flow rate adjusting portion configured to cause pressing force that the living tissue receives to periodically change by ejection of the fluid caused by controlling a flow rate of the fluid flowing through the fluid conduit at an arbitrary duty ratio.