ENDOSCOPIC DEVICE

• US 20120238805A1
• Filed: 03/16/2012
• Published: 09/20/2012
• Est. Priority Date: 03/17/2011
• Status: Abandoned Application

• Current Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Original Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Inventors: IWASAKA, Masayuki, Ohki, Tomohiro
• Application Number:
  US13/423,007
• Publication Number:
  US 20120238805A1
• Time in Patent Office: Days
• US Class Current: 600/104
• CPC Class Codes: A61B 1/0008 characterised by distal tip features
• CPC Class Codes: A61B 1/00098 Deflecting means for inserted tools
• CPC Class Codes: A61B 1/0055 Constructional details of insertion parts, e.g. vertebral elements
• CPC Class Codes: A61B 1/018 for receiving instruments
• CPC Class Codes: A61B 1/05 characterised by the image sensor, e.g. camera, being in the distal end portion

Abstract

An endoscopic device provided with an observation window in a distal end face of an insertion part to be inserted into a subject, an observational direction from the observation window being substantially identical with a longitudinal axis of the insertion part, the endoscope comprising:

• • a concave guide surface disposed in a distal lateral portion of the insertion part so as to extend along a longitudinal direction of the insertion part; and
  • a bending part configured to be bendable with the guide surface inside, wherein
  • a treatment instrument fed from a distal end exit of a treatment instrument passage disposed closer to a proximal end of the insertion part than the guide surface is guided along the guide surface when the bending part is bent.

Claims

1. An endoscopic device provided with an observation window in a distal end face of an insertion part to be inserted into a subject, an observational direction from the observation window being substantially identical with a longitudinal axis of the insertion part, the endoscope comprising:

a concave guide surface disposed in a distal lateral portion of the insertion part so as to extend along a longitudinal direction of the insertion part; and

a bending part configured to be bendable with the guide surface inside, wherein

a treatment instrument fed from a distal end exit of a treatment instrument passage disposed closer to a proximal end of the insertion part than the guide surface is guided along the guide surface when the bending part is bent.

2. The endoscopic device according to claim 1, wherein the guide surface is provided with a plurality of guide surfaces corresponding to a plurality of treatment instruments different in outer diameter.

3. The endoscopic device according to claim 2, wherein the guide surface is provided with a first groove portion constituting a first guide surface having a first radius of curvature and is provided with a second groove portion constituting a second guide surface having a second radius of curvature smaller than the first radius of curvature, the second groove portion being within the first groove portion.

4. The endoscopic device according to claim 1, wherein

the guide surface is provided within a range from the distal end exit of the treatment instrument passage to the distal end face of the insertion part so as to extend along a longitudinal direction of the insertion part;

and

a covering member for guiding the treatment instrument fed from the distal end exit of the treatment instrument passage to a side on which the guide surface is formed is disposed so as to cover the guide surface.

5. The endoscopic device according to claim 4, wherein a proximal end of the covering member is fixed to the distal end exit of the treatment instrument passage in a cantilever manner.

6. The endoscopic device according to claim 5, wherein the guide surface is provided with an engaging member engaged with a distal end of the covering member.

7. The endoscopic device according to claim 1, wherein the treatment instrument passage is disposed inside of the insertion part of the endoscope or in an insertion aid through which the insertion part is passed to be guided.

8. The endoscopic device according to claim 7, wherein the insertion aid have a groove portion constituting the treatment instrument passage, the groove portion being formed on an inner wall surface of a passage through which the insertion part is inserted so as to extend along a longitudinal direction of the passage.

9. The endoscopic device according to claim 7, wherein the insertion aid is provided with a first passage through which the insertion part is passed, and a second passage constituting the treatment instrument passage.

10. The endoscopic device according to claim 1, wherein a cross-section of a portion where the concave guide surface has been formed, which is perpendicular to the longitudinal direction of the insertion part, is a cross-section having the shape of an arc having a central angle of 180 degrees or more with respect to a central axis of the insertion part, and operation wires for bending the bending part are passed through both ends of the cross-section.