Endoscopic tissue collecting instrument
First Claim
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1. An endoscopic tissue collecting instrument comprising:
- a needle shaft with a tip pointed forward, that has a tissue retaining recess formed in a lateral side of an area close to the tip;
an outer sheath that is fitted over the needle shaft to be capable of moving back and forth and which has a blade formed at a distal end to cut off a tissue retained in the recess; and
a fixing member that is engageable with basal end portions of the needle shaft and the outer sheath and which can be securely connected to or disconnected from an entrance of a treatment instrument insertion channel in an endoscope.
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Abstract
An endoscopic tissue collecting instrument includes a needle shaft with a tip pointed forward, that has a tissue retaining recess formed in a lateral side of an area close to the tip, an outer sheath that is fitted over the needle shaft to be capable of moving back and forth and which has a blade formed at a distal end to cut off a tissue retained in the recess, and an aspiration channel communicating with the recess from a rear side, which is formed between the needle shaft and the outer sheath.
262 Citations
7 Claims
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1. An endoscopic tissue collecting instrument comprising:
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a needle shaft with a tip pointed forward, that has a tissue retaining recess formed in a lateral side of an area close to the tip;
an outer sheath that is fitted over the needle shaft to be capable of moving back and forth and which has a blade formed at a distal end to cut off a tissue retained in the recess; and
a fixing member that is engageable with basal end portions of the needle shaft and the outer sheath and which can be securely connected to or disconnected from an entrance of a treatment instrument insertion channel in an endoscope. - View Dependent Claims (2, 3, 4, 5, 6, 7)
an aspiration channel that communicates with the tissue retaining recess in a distal end portion and which extends to the basal end portion of the needle shaft.
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Specification