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US 6,071,233 AGranted
Endoscope
AssigneeOlympus Optical Co., Ltd.
InventorsMasahiro Ishikawa, Koichi Kawashima, Tetsuya Yamamoto, Takayuki Suzuki, Tsutomu Okada
Life of this patent
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Abstract
The present invention provides an endoscope having an opening of a channel tube retracted from a distal end face having an observation window of the insert therein toward a proximal end side. When a plurality of polyps are removed, a picked-up polyp is moved back from the distal end face of the insert toward the proximal side of the insert in order for the picked-up polyp not to interfere with observation by the endoscope and operation by a cutting tool extending through the endoscope channel.
Claims25
An endoscope comprising:
- an insert having a distal end portion to be inserted in an area to be observed, said distal end portion of the insert having an observation window, and said insert having a first channel therein which has a first distal end opening portion directed toward a space exterior to the endoscope and through which a first operating tool may be passed;
- a second channel arranged along an axial direction of the insert, said second channel having a second distal end opening portion directed toward the space exterior to the endoscope and through which a second operating tool may be passed;
- wherein said second distal end opening portion of the second channel is formed at a position retracted from the observation window toward a proximal end of the insert.
An endoscope comprising:
- an insert having a distal end to be inserted in an area to be observed, said distal end portion of the insert having an observation window,
- a channel arranged along an axial direction of the insert, said channel having a distal end opening directed toward a space exterior to the endoscope and through which an operating tool for picking up a foreign body may be passed;
- wherein said distal end opening of the channel is retracted from the observation window toward a proximal end of the insert.
Dependencies are inferred from the claim text.