Endoscope and endoscope system
AssigneeOlympus Corporation
InventorsKazuya Sasaguchi, Soichi Ikuma, Eijiro Sato, Hiroki Kazuno
Life of this patent
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Abstract
An endoscope includes an insertion portion that is inserted into a subject, and a suction channel that suctions a liquid along with a crushed calculus. The suction channel includes a channel main body, which is inserted in the insertion portion, and a small-diameter channel portion that is provided on a distal end side of the channel main body and has an inner diameter smaller than an inner diameter of the channel main body. The suction channel is configured to satisfy the relational expression R1/R2>1.27, where R1 represents the inner diameter of the channel main body and R2 represents the inner diameter of the small-diameter channel portion.
Claims10
An endoscope, comprising:
- an insertion portion configured to be inserted into a subject;
- and
- a suction channel that comprises:
- a channel main body inserted in the insertion portion, and
- a small-diameter channel portion which is provided on a distal end side of the channel main body, includes a channel opening in a distal end face of the insertion portion, and has an inner diameter smaller than an inner diameter of the channel main body,
- wherein the suction channel also serves as a treatment instrument channel,
- wherein the suction channel is configured to suction, from the channel opening, a liquid along with a crushed calculus,
- wherein the suction channel is configured to satisfy the following relational expression:
- R1/R2>1.27,
- where R1 represents an inner diameter of the channel main body and R2 represents an inner diameter of the small-diameter channel portion, and
- wherein the suction channel is configured to satisfy the following relational expression:
- R1−R3≥2(R2−R4),
- with respect to a treatment instrument including a treatment instrument main body that is inserted into the channel main body and has an outer diameter R3, and a distal-end-side shaped portion that is inserted into the small-diameter channel portion and has an outer diameter R4.
An endoscope system, comprising:
- an endoscope that comprises;
- an insertion portion configured to be inserted into a subject, and
- a suction channel that comprises:
- a channel main body inserted in the insertion portion, and
- a small-diameter channel portion which is provided on a distal end side of the channel main body, includes a channel opening in a distal end face of the insertion portion, and has an inner diameter smaller than an inner diameter of the channel main body,
- wherein the suction channel being is configured to suction, from the channel opening, a liquid along with a crushed calculus;
- a calculus crushing device that comprises;
- a probe configured to protrude from the insertion portion and crush the calculus, and
- a generator configured to supply energy to the probe;
- a pump configured to suction the liquid or cause the liquid to flow backward, along with the calculus through the suction channel;
- and
- a treatment instrument comprising:
- a treatment instrument main body, which is inserted into the channel main body, and
- a distal-end-side shaped portion that is inserted into the small-diameter channel portion,
- wherein the suction channel is configured to satisfy the following relational expression:
- R1/R2>1.27,
- where R1 represents an inner diameter of the channel main body and R2 represents an inner diameter of the small-diameter channel portion,
- wherein the suction channel and the treatment instrument are configured to satisfy the following relational expression:
- R1−R3≥2(R2−R4),
- where R3 represents an outer diameter of the treatment instrument main body and R4 represents an outer diameter of the distal-end-side shaped portion,
- wherein the suction channel also serves as a treatment instrument channel,
- wherein the treatment instrument is configured to be inserted in the suction channel, extend from the channel opening, and crush the calculus, and
- wherein the pump suctions the liquid along with the calculus from between the small-diameter channel portion and the distal-end-side shaped portion, through the channel opening.
Dependencies are inferred from the claim text.