BIOPSY TREATMENT INSTRUMENT
A biopsy treatment instrument according to the present invention includes a flexible sheath, an insertion portion capable of advancing and retracting in the flexible sheath, a recessed portion for specimen sampling provided on a side surface of the insertion portion, a capacitive ultrasound transducer array provided on a bottom surface of the recessed portion for specimen sampling, and a slide portion that relatively slides the insertion portion and the flexible sheath so that the recessed portion for specimen sampling opens and closes. It is determined on the basis of a reflected wave received by the capacitive ultrasound transducer array whether or not a specimen is captured into the recessed portion for specimen sampling. Therefore, it is possible to surely sample the specimen.
1 . A biopsy treatment instrument comprising:
a tubular portion;
a bar-like portion capable of advancing and retracting in the tubular portion;
a recessed portion provided on a side surface of the bar-like portion;
an ultrasound observation section provided on a bottom surface of the recessed portion; and
a slide portion that relatively slides the bar-like portion and the tubular portion so that the recessed portion opens and closes.
2 . The biopsy treatment instrument according to claim 1 , wherein
a distal end face of the bar-like portion is formed in a rotating body shape of a conical curve centering on an axis of the bar-like portion, and
an outer surface of a distal end of the tubular portion is formed in a single-edge shape inclining toward a tangential direction with respect to the distal end face of the bar-like portion.
3 . The biopsy treatment instrument according to claim 1 , wherein a circuit element that processes an ultrasound signal transmitted and received by the ultrasound observation section is incorporated in a distal end face of the bar-like portion.
4 . The biopsy treatment instrument according to claim 1 , wherein a wall surface of the recessed portion is expanded from a bottom surface of the recessed portion to an outer circumferential direction.
5 . The biopsy treatment instrument according to claim 1 , wherein the bar-like portion includes a suction conduit opened in the recessed portion.
6 . The biopsy treatment instrument according to claim 1 , wherein the recessed portion is arranged in an entire circumference of the bar-like portion.
7 . The biopsy treatment instrument according to claim 1 , wherein the ultrasound observation section is a capacitive ultrasound transducer manufactured using a micro machine manufacturing process.