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US 2018/0008129 A1Published application
Endoscopic surgical device
AssigneeFUJIFILM Corporation
InventorsToshiharu KUWAE, Shinichi YAMAKAWA
Life of this patent
Estimating the term…
Abstract
An endoscopic surgical device that can suitably puncture a body wall with an overtube that having two insertion passages is provided. In a case where a body wall is punctured with the overtube that has two insertion passages through which medical instruments are inserted and that has openings of the insertion passages in a distal end surface, distal end parts of two needle parts of an inner needle are disposed to protrude from the openings in a case where the inner needle is mounted. Accordingly, a distal end portion of the overtube has a tapered shape, cutting blade parts are disposed in the same straight line as seen from a distal end side, and an insertion load is reduced.
Claims12
An endoscopic surgical device comprising:
- an overtube;
- and
- an inner needle inserted through the overtube,
- the device puncturing a body wall in a state where the overtube and the inner needle are combined together,
- wherein the overtube includes
- an overtube body having a distal end, a proximal end, and a longitudinal axis,
- a first distal end opening and a second distal end opening provided at a distal end of the overtube body,
- a first proximal end opening and a second proximal end opening provided at a proximal end of the overtube body,
- a first insertion passage that is provided along the longitudinal axis of the overtube body and allows the first distal end opening and the first proximal end opening to communicate with each other,
- a second insertion passage that is provided along the longitudinal axis of the overtube body and allows the second distal end opening and the second proximal end opening to communicate with each other, and
- wherein the inner needle includes
- a first needle part that has a first distal end part and is inserted through the first insertion passage,
- a second needle part that has a second distal end part and is inserted through the second insertion passage,
- a first cutting blade part that is formed at the first distal end part, and has a length component orthogonal to the longitudinal axis,
- a second cutting blade part that is formed at the second distal end part and has a length component orthogonal to the longitudinal axis, and
- a positioning part that defines a position of the first distal end part with respect to the first distal end opening and a position of the second distal end part with respect to the second distal end opening in a state where the overtube and the inner needle are combined together, and
- wherein the first cutting blade part and the second cutting blade part are disposed along the same straight line as each other when the first cutting blade part and the second cutting blade part are projected on a plane perpendicular to the longitudinal axis, and
- wherein the first distal end part is disposed closer to a proximal end side than the second distal end part.
15 more elements
An overtube comprising:
- an overtube body having a distal end, a proximal end and a longitudinal axis;
- a first distal end opening and a second distal end opening provided at a distal end of the overtube body;
- a first proximal end opening and a second proximal end opening provided at a proximal end of the overtube body;
- a first insertion passage that is provided along the longitudinal axis of the overtube body and allows the first distal end opening and the first proximal end opening to communicate with each other;
- a second insertion passage that is provided along the longitudinal axis of the overtube body and allows the second distal end opening and the second proximal end opening to communicate with each other;
- and
- an interlocking member that is movable forward and backward inside the overtube body,
- wherein the overtube body has a tapered part that is tapered toward a distal end,
- wherein the tapered part has the second distal end opening, and the first distal end opening disposed closer to a proximal end side than the second distal end opening, and
- wherein the interlocking member has a first coupling part configured to be coupled to a first insertion part of a first medical instrument inserted through the first insertion passage, and a second coupling part configured to be coupled to a second insertion part of a second medical instrument inserted through the second insertion passage.
7 more elements
An inner needle which is used by being inserted through an overtube, comprising:
- a first needle part including a first distal end part and a longitudinal axis;
- a second needle part that includes a second distal end part and extends parallelly or obliquely to the longitudinal axis of the first needle part;
- a first cutting blade part that is formed at the first distal end part and has a length component orthogonal to the longitudinal axis;
- a second cutting blade part that is formed at the second distal end part and has a length component orthogonal to the longitudinal axis;
- and
- a positioning part that defines a position of the first distal end part with respect to an opening in the overtube for the first distal end part and a position of the second distal end part with respect to an opening in the overtube for the second distal end part in a state where the overtube and the inner needle are combined together,
- wherein the first cutting blade part and the second cutting blade part are disposed along the same straight line as each other when the first cutting blade part and the second cutting blade part are projected on a plane perpendicular to the longitudinal axis, and
- wherein the first distal end part is disposed closer to a proximal end side than the second distal end part.
5 more elements
Dependencies are inferred from the claim text.