Submucosal layer dissection instrument, submucosal layer dissection system, and submucosal layer dissection method
First Claim
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1. A submucosal layer dissection method using a submucosal layer dissection instrument comprising:
- an instrument body having an insertion path which is provided along an axial direction of the instrument body and which has a distal end opening positioned at a distal end portion of the instrument body;
an incision instrument disposed inside the insertion path so as to be capable of protruding from and retracting from the distal end opening of the instrument body; and
an expanding section which is provided on an outer surface of the distal end portion of the instrument body that is capable of expanding in a case of having received a supply of a fluid, a distal end part of the expanding section being positioned at the distal end portion of the instrument body when the expanding section is expanded;
the method comprising;
elevating an affected area of the digestive tract by supplying liquid into the submucosal layer;
subsequent to the elevating, inserting the distal end portion of the instrument body which includes the expanding section into the submucosal layer; and
subsequent to the inserting, expanding the expanding section until the distal end part of the expanding section is positioned at a same position of the distal end portion of the instrument body in the axial direction by supplying the fluid thereto until the submucosal layer is dissected by an expansion force of the expanding section while the incision instrument is inserted into the insertion path.
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Abstract
A submucosal layer dissection instrument of the present invention includes an instrument body that is inserted into a submucosal layer, a line formed between the proximal end side and the distal end side of the instrument body; and an expanding section provided on the distal end side of the instrument body that expands in the case of having received a supply of fluid through the line.
22 Citations
13 Claims
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1. A submucosal layer dissection method using a submucosal layer dissection instrument comprising:
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an instrument body having an insertion path which is provided along an axial direction of the instrument body and which has a distal end opening positioned at a distal end portion of the instrument body; an incision instrument disposed inside the insertion path so as to be capable of protruding from and retracting from the distal end opening of the instrument body; and an expanding section which is provided on an outer surface of the distal end portion of the instrument body that is capable of expanding in a case of having received a supply of a fluid, a distal end part of the expanding section being positioned at the distal end portion of the instrument body when the expanding section is expanded;
the method comprising;elevating an affected area of the digestive tract by supplying liquid into the submucosal layer; subsequent to the elevating, inserting the distal end portion of the instrument body which includes the expanding section into the submucosal layer; and subsequent to the inserting, expanding the expanding section until the distal end part of the expanding section is positioned at a same position of the distal end portion of the instrument body in the axial direction by supplying the fluid thereto until the submucosal layer is dissected by an expansion force of the expanding section while the incision instrument is inserted into the insertion path. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A submucosal layer dissection method using a submucosal layer dissection system comprising:
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an endoscope in which a first channel and a second channel are provided; a submucosal dissection instrument inserted into the first channel comprising; an instrument body having an insertion path and a fluid passage extending in an axial direction thereof, the insertion path having a distal end opening positioned at a distal end portion of the instrument body, an injection port provided at a proximal end side of the insertion body, the injection port being connected to the fluid passage; an incision instrument disposed inside the insertion path so as to be capable of protruding from and retracting from the distal end opening of the instrument body; and an expanding section provided on the distal end portion of the instrument body that is capable of expanding when receiving a supply of a fluid from the injection port;
whereina distal end part of the expanding section is at a distal end portion of the instrument body when the expanding section is expanded; and a submucosal injection needle inserted into the second channel, which injects a liquid into the submucosal layer, the method comprising; elevating the submucosal layer by injecting a liquid into the submucosal layer using the submucosal injection needle of the submucosal layer dissection system; inserting the submucosal layer dissection instrument into the elevated submucosal layer; and dissecting the submucosal layer by supplying a fluid into the expanding section of the submucosal layer dissection instrument to expand the expanding section while the incision instrument is inserted into the insertion path. - View Dependent Claims (13)
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Specification