JP2010029487A - Endoscope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an endoscope capable of shortening a range, where a treatment tool projecting from a treatment tool projection port can be freely bent, only when needed, imparting a direct tactile to the operation of incising a mucosa or the like and executing accurate incision treatment. <P>SOLUTION: In front of the treatment tool projection port 7o and at the inner peripheral part near the distal end of a distal end hood 10, a treatment tool fixing device 11 is provided which is capable of binding and unbinding a part near the distal end of the treatment tool 100 projecting from the treatment tool projection port 7o by a remote operation, and is freely fixing and releasing the part near the distal end of the treatment tool 100 to and from a position near the distal end of the distal end hood 10. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an endoscope.

  A distal end of the insertion portion of the endoscope is generally provided with a treatment tool projection for projecting a treatment tool for performing various treatments such as incision and excision of the mucosa in the body, etc., and guides the treatment tool protruding from the treatment tool projection For example, there is a guide groove provided on the tip hood (for example, Patent Document 1).

  When performing mucosal resection or the like through a treatment instrument through an endoscope, the entire distal end portion of the insertion portion of the endoscope with the distal end portion of the treatment instrument such as a high-frequency knife protruding from the treatment instrument projection port Perform an operation to swing the head greatly.

  However, if the head of the endoscope is shaken in a state where the distal end of the treatment tool is in contact with the mucous membrane in the body, the treatment tool protruding from the treatment tool protrusion is greatly bent, and the mucosal incision against the movement of the endoscope In some cases, a delay occurs in the operation of the device, and an accurate incision procedure cannot be performed.

Therefore, by using a tip hood (for example, Patent Document 2) having a function capable of expanding and contracting the loop wire in front of the treatment instrument protruding port, a portion near the tip of the treatment tool protruding from the treatment tool protruding port is used. It can be used in such a way that it is tightly fixed to the tip hood.
JP2003-204919A JP 2002-45369 A

  Patent Document 2 does not suggest a method of binding a treatment tool protruding from a treatment tool protrusion to a tip hood, but even if such a method is used, the invention described in Patent Document 2 When the loop wire is constricted, the loop wire is pulled into the back side of the tip hood.

  Accordingly, since the treatment instrument is fixed to the distal end hood in the immediate vicinity of the treatment instrument protrusion, the range in which the treatment instrument can be freely bent is hardly shortened, and the incision treatment operation as described above is improved. Does not contribute.

  The present invention shortens the range in which the treatment tool protruding from the treatment tool protrusion can freely bend only when necessary, and gives a direct feeling to the operation of mucosal incision, etc. An object is to provide an endoscope that can be performed.

  In order to achieve the above object, an endoscope according to the present invention has a treatment tool projection port disposed on a distal end surface of an insertion portion and a distal end projecting in a cylindrical shape from the outer edge of the distal end surface of the insertion portion. In an endoscope provided with a hood, a distal portion of the treatment instrument protruding from the treatment instrument protruding port is remotely bound to an inner peripheral portion in the vicinity of the distal end of the distal end hood and in front of the treatment instrument protruding opening. A treatment tool fixing tool that can release the binding and can fix and release the vicinity of the distal end of the treatment instrument at the position near the distal end of the distal end hood is provided.

  The treatment instrument fixing tool may be provided with a loop wire that expands and contracts by remote operation, and the distal end portion of the treatment instrument may pass through the loop wire. Further, a loop wire protruding port from which the loop wire protrudes may be formed on the inner peripheral portion in the vicinity of the tip of the tip hood. In this case, an operation wire and a guide sheath for expanding and contracting the loop wire are provided at the tip. You may arrange | position in the state which penetrates the surrounding wall of a front-end | tip hood diagonally forward toward the loop wire protrusion port from the outer surface of the hood.

  In addition, a guide groove for guiding the treatment tool protruding from the treatment tool protrusion to the position of the loop wire may be formed in the inner peripheral portion of the tip hood.

  According to the present invention, the treatment tool protruding from the treatment tool protrusion can freely bend by fixing the portion near the distal end of the treatment tool protruding from the treatment tool protrusion at the position near the tip of the tip hood. The range can be shortened only when necessary to give a direct feeling to the operation of mucosal incision and the like, and an accurate incision treatment can be performed.

  In an endoscope in which a treatment instrument protruding port is disposed on the distal end surface of the insertion portion and a distal end hood that protrudes in a cylindrical shape from the outer edge of the distal end surface of the insertion portion is provided in the vicinity of the distal end of the distal end hood. The front end portion of the treatment instrument that protrudes from the treatment instrument projection opening can be remotely bound and released at the inner peripheral portion in front of the treatment instrument projection opening by remote control. A treatment tool fixture that can be fixed and released at a position near the tip of the hood is provided.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 3 shows the overall configuration of the endoscope. The bending portion 2 formed at the distal end portion of the flexible insertion portion 1 is connected to the operation portion 3 connected to the proximal end of the insertion portion 1. It can be bent at any angle in any direction by remote operation.

  A bending operation knob 4 for bending the bending portion 2 can individually rotate two knobs arranged in two stages on the same axis, and causes the distal end portion of the insertion portion 1 to swing. Operations and the like can be easily performed.

  A tip hood 10 is detachably attached to a tip portion main body 5 connected to the tip of the bending portion 2. In the tip hood 10, a loop wire 11 that can be expanded and contracted is disposed as a treatment instrument fixture described later.

  Reference numeral 12 denotes a guide sheath through which an operation wire for expanding and contracting the loop wire 11 is inserted, and is held in a state along the outer periphery of the insertion portion 1 by a fastening ring 13 or the like. Reference numeral 14 denotes a loop wire operation unit connected to the proximal end of the guide sheath 12 so that the operation wire can be advanced and retracted, and is the same as an operation unit such as a known endoscope forceps.

  FIG. 2 shows a portion of the distal end portion of the insertion portion 1 where the distal end hood 10 is attached to the distal end portion main body 5, and the outlet of the treatment instrument insertion channel 7 that is inserted through the entire length of the insertion portion 1. A treatment instrument protrusion port 7o that is an opening is disposed on the distal end surface of the distal end portion body 5 (that is, the distal end surface of the insertion portion 1) 5a so as to be directed forward along with the observation window 8 and the like. As shown in FIG. 3, the treatment instrument insertion port 7 i that is the entrance of the treatment instrument insertion channel 7 is disposed in the vicinity of the lower end of the operation section 3.

  For example, the tip hood 10 formed of a material such as elastic silicon rubber protrudes forward in a substantially cylindrical shape from the outer edge of the tip surface 5a of the tip portion main body 5 to be elastically deformed. Thus, it can be attached to and detached from the tip body 5. The tip hood 10 of this embodiment has a shape in which the outer shape gradually narrows toward the tip side, but other shapes may be used.

  The loop wire 11 is formed of an elastic wire so as to swell in a loop shape by its own elasticity, and is a loop wire formed in an inner peripheral portion near the distal end of the distal end hood 10 and in front of the treatment instrument projecting port 7o. The loop wire 11 projects into the tip hood 10 from the projecting port 15.

  The operation wire 16 and the guide sheath 12 for expanding and contracting the loop wire 11 are arranged in a state of cutting through the peripheral wall of the distal end hood 10 obliquely forward from the outer surface of the distal end hood 10 toward the loop wire projecting port 15.

  As described above, in the loop wire 11 disposed in the inner peripheral portion in the vicinity of the distal end of the distal end hood 10 and in front of the treatment instrument protruding port 7o, the operation wire 16 is pulled by the loop wire operating portion 14 side. When all or part of the wire is drawn into the loop wire projecting port 15 and is narrowed, and the operation wire 16 is pushed in, the loop wire projecting port 15 projects into the tip hood 10 and swells.

  As shown in FIG. 2, when the treatment instrument 100 is projected from the treatment instrument projection port 7o in a state where the loop wire 11 is swollen in the distal hood 10, the distal end of the treatment instrument 100 is obtained as shown in FIG. A portion passes through the loop wire 11.

  Therefore, as shown in FIG. 1, if the operation wire 16 is pulled to close the loop wire 11, the vicinity of the distal end of the treatment instrument 100 is bound by the loop wire 11, and the treatment instrument 100 is attached to the distal end hood 10. It will be in the state fixed to the front-end | tip vicinity part (position of the loop wire protrusion port 15). In this way, it is possible to shorten the range in which the distal end portion of the treatment instrument 100 protruding from the treatment instrument protrusion 7o can be freely bent.

  As a result, if the oscillating operation of the insertion portion 1 is performed in this state, the distal end portion of the treatment instrument 100 moves with little delay with respect to the oscillating operation of the insertion portion 1, so that direct operation to mucosal incision or the like is possible. A feeling can be obtained and an accurate incision procedure can be performed.

  Then, if the operation wire 16 is pushed in by the loop wire operation unit 14, the loop wire 11 is pushed out from the loop wire projection port 15 and returns to the swelled state, so that the state in which the loop wire 11 is bound to the treatment instrument 100 is released. Thus, the treatment instrument 100 is released from the state of being fixed to the distal end hood 10, and the treatment instrument 100 can be arbitrarily advanced and retracted so that it can be taken in and out of the treatment instrument projection port 7o.

  FIG. 4 shows a second embodiment of the present invention, in which the treatment instrument 100 projected from the treatment instrument projection 7o is placed on the inner periphery of the tip hood 10 at the position of the loop wire 11 (ie, the loop wire projection opening). 15), guide grooves 18 for guiding are formed. 5 is a cross-sectional view taken along the line VV in FIG. If comprised in this way, the treatment tool 100 protruded from the treatment tool protrusion 7o can be reliably passed through the loop wire 11.

In the endoscope of the 1st example of the present invention, it is a side sectional view of the tip of an insertion part in the state where a treatment tool was tightly fixed with a loop wire. It is side surface sectional drawing of the insertion part front-end | tip of the endoscope of 1st Example of this invention. 1 is an overall configuration diagram of an endoscope according to a first embodiment of the present invention. It is side surface sectional drawing of the insertion part front-end | tip of the endoscope of 2nd Example of this invention. FIG. 5 is a cross-sectional view of the second embodiment of the present invention taken along line VV in FIG. 4.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Insertion part 5 Tip part main body 5a Tip surface 7o Treatment tool protrusion 10 Tip hood 11 Loop wire (treatment tool fixing tool)
12 Guide sheath 14 Loop wire operation part 15 Loop wire protrusion 16 Operation wire 18 Guide groove 100 Treatment tool

Claims (5)

In an endoscope in which a treatment instrument protruding port is disposed on the distal end surface of the insertion portion and a distal end hood that protrudes in a cylindrical shape from the outer edge of the distal end surface of the insertion portion toward the front is provided.
The distal end portion of the treatment instrument projecting from the treatment instrument protruding port can be bound and released by remote control at the inner peripheral portion near the distal end of the distal end hood and in front of the treatment instrument projection opening. An endoscope characterized in that a treatment tool fixture that can fix and release a portion near the distal end of the treatment instrument at a position near the distal end of the distal hood is provided.   The endoscope according to claim 1, wherein the treatment tool fixing tool includes a loop wire that expands and contracts by remote control, and a distal end portion of the treatment tool passes through the loop wire.   The endoscope according to claim 2, wherein a loop wire projecting port from which the loop wire projects is formed in an inner peripheral portion in the vicinity of the distal end of the distal end hood.   The operation wire for expanding and contracting the loop wire and the guide sheath are arranged in a state of cutting through the peripheral wall of the tip hood obliquely forward from the outer surface of the tip hood toward the loop wire projection opening. The endoscope described.   5. The guide groove according to claim 1, wherein a guide groove for guiding the treatment tool protruding from the treatment tool protruding port to the position of the loop wire is formed in an inner peripheral portion of the tip hood. Endoscope.

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