ENDOSCOPIC SURGICAL DEVICE, OUTER SLEEVE, AND ENDOSCOPE

• US 20160174825A1
• Filed: 03/02/2016
• Published: 06/23/2016
• Est. Priority Date: 09/03/2013
• Status: Active Grant

• Current Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Original Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Inventors: DEJIMA, Takumi
• Granted Patent: US 10,092,173 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61B 1/00087 Tools A61B17/00234 takes precedence
• CPC Class Codes: A61B 1/00135 Oversleeves mounted on the endoscope prior to insertion
• CPC Class Codes: A61B 1/00154 using guiding arrangements for insertion
• CPC Class Codes: A61B 1/00174 characterised by the viewing angles
• CPC Class Codes: A61B 1/018 for receiving instruments
• CPC Class Codes: A61B 1/313 for introducing through surgical openings, e.g. laparoscopes
• CPC Class Codes: A61B 17/3421 Cannulas
• CPC Class Codes: A61B 17/3474 Insufflating needles, e.g. Veress needles
• CPC Class Codes: A61B 2017/22074 the instrument being only slidable in a channel, e.g. advancing optical fibre through a channel
• CPC Class Codes: A61B 2017/3445 used as instrument channel for multiple instruments
• CPC Class Codes: A61B 2017/3456 blunt
• CPC Class Codes: A61B 90/37 Surgical systems with images on a monitor during operation

Abstract

The overtube includes a slider within an overtube body, which guides an endoscope and a treatment tool. An endoscope-coupled part and a treatment tool-coupled part are provided inside the slider, and the slider has a dead zone where the forward and backward movement of either the endoscope or the treatment tool does not interlock with the movement of the other and a sensing zone where the forward and backward movement of either the endoscope or the treatment tool interlocks with the movement of the other. The overtube body includes a distal-end-side stopper and a base-end-side stopper that restrict the movable range of the slider. A length L from a coupling position of the endoscope to a distal end position of the overtube body and a length Ls from the coupling position of the endoscope to a distal end position of the endoscope are set to satisfy Ls≧L.

Claims

1. An endoscopic surgical device comprising:

an endoscope that observes the inside of a body cavity;

a treatment tool that inspects or treats an affected part within the body cavity; and

an overtube that guides the endoscope and the treatment tool into the body cavity,

wherein the overtube includes

an overtube body that passes through a body wall and is inserted into the body cavity,

an endoscope insertion passage that is provided inside the overtube body and allows the endoscope to be inserted therethrough so as to be movable forward and backward,

a treatment tool insertion passage that is provided inside the overtube body and allows the treatment tool to be inserted therethrough so as to be movable forward and backward, and

an interlocking member that is configured to be movable forward and backward inside the overtube body, has an endoscope-coupled part to be coupled to the endoscope inserted through the endoscope insertion passage and a treatment tool-coupled part to be coupled to the treatment tool inserted through the treatment tool insertion passage, and has a dead zone where the forward and backward movement of either one of the endoscope and the treatment tool does not interlock with the movement of the other and a sensing zone where the forward and backward movement of either one of the endoscope and the treatment tool interlocks with the movement of the other,

where the overtube body includes a distal-end-side stopper that restricts the forward and backward movement of the interlocking member to a distal end side, and a base-end-side stopper that restricts the forward and backward movement of the interlocking member with respect to a base end side, and

wherein, in a state where the interlocking member has abutted against the base-end-side stopper and the forward and backward movement of the interlocking member to the base end side has been restricted, when a length from a coupling position of the endoscope, to which the endoscope-coupled part is coupled, to a distal end position of the overtube body in an axial direction of the overtube body is defined as L and a length from the coupling position to a distal end position of the endoscope is defined as Ls, the coupling position is set so as to satisfy a following formula.

Ls≧

L

2. The endoscopic surgical device according to claim 1,

wherein the endoscope includes a smaller-diameter part that is arranged on the distal end side, and a larger-diameter part that is connected to the base end side of the smaller-diameter part, the smaller-diameter part is configured to be non-engageable with the endoscope-coupled part, and the larger-diameter part is configured to be engageable with the endoscope-coupled part.

3. The endoscopic surgical device according to claim 2,

wherein the endoscope-coupled part is provided with a frictional engagement part that frictionally engages with the larger-diameter part.

4. The endoscopic surgical device according to claim 1,

wherein the endoscope is made of a high-friction member having a higher frictional coefficient at the coupling position than at other positions where the endoscope-coupled part is not coupled, and

wherein the endoscope-coupled part is made of a frictional engagement part that frictionally engages with the high-friction member.

5. The endoscopic surgical device according to claim 1,

wherein the interlocking member includes a slider member that is coupled to the endoscope and moves forward and backward integrally with the endoscope, and a sleeve member that is coupled to the treatment tool and moves forward and backward integrally with the treatment tool, and

wherein a range where the sleeve member is movable forward and backward with respect to the slider member is limited.

6. The endoscopic surgical device according to claim 5,

wherein the sleeve member is configured so as to be rotatable around the axis with respect to the slider member.

7. The endoscopic surgical device according to claim 5,

wherein the slider member is configured so as to be non-rotatable around the axis with respect to the overtube body.

8. The endoscopic surgical device according to claim 1,

wherein a following formula is satisfied when a fixing force for fixing the endoscope-coupled part to the endoscope is defined as F1 and a fixing force for fixing the treatment tool-coupled part to the treatment tool is defined as F2.

F1>

F2

9. The endoscopic surgical device according to claim 1, further comprising:

a first valve member that is provided in the endoscope insertion passage and secures airtightness within the body cavity; and

a second valve member that is provided in the treatment tool insertion passage and secures airtightness within the body cavity,

wherein following formulas are satisfied when a fixing force for fixing the endoscope-coupled part to the endoscope is defined as F1, a fixing force for fixing the treatment tool-coupled part to the treatment tool is defined as F2, and a frictional force that the endoscope receives from the first valve member when the endoscope moves forward and backward is defined as F3.

F1>

F3

F2>

F3

10. An overtube comprising:

an overtube body that passes through a body wall and is inserted into a body cavity;

an endoscope insertion passage that is provided inside the overtube body and allows an endoscope for observing the inside of the body cavity to be inserted therethrough so as to be movable forward and backward;

a treatment tool insertion passage that is provided inside the overtube body and allows a treatment tool for inspecting or treating an affected part within the body cavity to be inserted therethrough so as to be movable forward and backward; and

an interlocking member that is configured to be movable forward and backward inside the overtube body, has an endoscope-coupled part to be coupled to the endoscope inserted through the endoscope insertion passage and a treatment tool-coupled part to be coupled to the treatment tool inserted through the treatment tool insertion passage, and has a dead zone where the forward and backward movement of either one of the endoscope and the treatment tool does not interlock with the movement of the other and a sensing zone where the forward and backward movement of either one of the endoscope and the treatment tool interlocks with the movement of the other;

wherein the overtube body includes a distal-end-side stopper that restricts the forward and backward movement of the interlocking member to a distal end side; and

a base-end-side stopper that restricts the forward and backward movement of the interlocking member with respect to a base end side,

wherein, in a state where the interlocking member has abutted against the base-end-side stopper and the forward and backward movement of the interlocking member to the base end side has been restricted, when a length from a coupling position of the endoscope, to which the endoscope-coupled part is coupled, to a distal end position of the overtube body in an axial direction of the overtube body is defined as L and a length from the coupling position to a distal end position of the endoscope is defined as Ls, the coupling position is set so as to satisfy a following formula.

Ls≧

L

11. The overtube according to claim 10,

wherein the endoscope includes a smaller-diameter part that is arranged on the distal end side, and a larger-diameter part that is connected to the base end side of the smaller-diameter part, the endoscope-coupled part is configured to be non-engageable with the smaller-diameter part, and the endoscope-coupled part is configured to be engageable with the larger-diameter part.

12. The overtube according to claim 11,

wherein the endoscope-coupled part is provided with a frictional engagement part that frictionally engages with the larger-diameter part.

13. The overtube according to claim 10,

wherein the endoscope is made of a high-friction member having a higher frictional coefficient at the coupling position than at other positions where the endoscope-coupled part is not coupled, and

wherein the endoscope-coupled part is made of a frictional engagement part that frictionally engages with the high-friction member.

14. An endoscope that is guided into a body cavity via an overtube, the overtube including

an overtube body that passes through a body wall and is inserted into the body cavity,

an endoscope insertion passage that is provided inside the overtube body and allows an endoscope for observing the inside of the body cavity to be inserted therethrough so as to be movable forward and backward,

a treatment tool insertion passage that is provided inside the overtube body and allows a treatment tool for inspecting or treating an affected part within the body cavity to be inserted therethrough so as to be movable forward and backward, and

an interlocking member that is configured to be movable forward and backward inside the overtube body, has an endoscope-coupled part to be coupled the endoscope inserted through the endoscope insertion passage and a treatment tool-coupled part to be coupled the treatment tool inserted through the treatment tool insertion passage, and has a dead zone where the forward and backward movement of either one of the endoscope and the treatment tool does not interlock with the movement of the other and a sensing zone where the forward and backward movement of either one of the endoscope and the treatment tool interlocks with the movement of the other,

wherein the overtube body includes a distal-end-side stopper that restricts the forward and backward movement of the interlocking member to a distal end side, and a base-end-side stopper that restricts the forward and backward movement of the interlocking member with respect to a base end side,

wherein, in a state where the interlocking member has abutted against the base-end-side stopper and the forward and backward movement of the interlocking member to the base end side has been restricted, when a length from a coupling position of the endoscope, to which the endoscope-coupled part is coupled, to a distal end position of the overtube body in an axial direction of the overtube body is defined as L and a length from the coupling position to a distal end position of the endoscope is defined as Ls, the coupling position is set so as to satisfy a following formula.

Ls≧

L

15. The overtube according to claim 14,

wherein the endoscope includes a smaller-diameter part that is arranged on the distal end side, and a larger-diameter part that is connected to the base end side of the smaller-diameter part, the smaller-diameter part is configured to be non-engageable with the endoscope-coupled part, and the larger-diameter part is configured to be engageable with the endoscope-coupled part.

16. The endoscope according to claim 15,

wherein the larger-diameter part frictionally engages with a frictional engagement part that is provided at the endoscope-coupled part.

17. The endoscopic surgical device according to claim 14,

wherein the endoscope is made of a high-friction member having a higher frictional coefficient at the coupling position than at other positions where the endoscope-coupled part is not coupled, and

wherein the high-friction member frictionally engages with the frictional engagement part provided at the endoscope-coupled part.