JP2005080952A - Forceps for endoscope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a forceps for an endoscope capable of easily washing a target affected area with a washing liquid in the state where a leading end forceps pieces opening and closing like a bill around a support shaft directly faces the target affected area. <P>SOLUTION: A liquid sending tube 10 is arranged parallel to an operating wire 2 along the whole length of a sheath 1 within the sheath 1, an exit opening 10a of the liquid sending tube 10 is arranged directing it straightly forward from the position ahead of the support shaft 9, thereby jetted water from the exit opening 10a of the liquid sending tube 10 is directed to the space between the pair of leading end forceps pieces 3. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an endoscopic forceps that is used through a treatment instrument insertion channel of an endoscope in order to perform hemostasis and tissue collection in the body.

  Endoscopic forceps generally have a drive arm integrally connected to the rear part of each pair of tip forceps pieces, and the drive arms are rotatable around a support shaft in the vicinity of the boundary with the tip forceps piece. When the operation wire, which is supported by the distal end portion of the sheath and is inserted and arranged in the sheath and the distal end of which is connected to the driving arm, is advanced and retracted in the axial direction, the distal forceps piece is rotated about the support shaft. It is designed to be opened and closed in a shape.

  However, when using endoscopic forceps, before the intended hemostasis or tissue sampling, etc., the cleaning solution is sprayed on the mucosal surface to wash away blood or dirt, or the dye solution is sprayed to remove normal mucous membranes. Sometimes it is desirable to make it easier to distinguish from abnormal mucous membranes.

Therefore, conventionally, the space in the sheath is used as a liquid passage so that the cleaning liquid, the dye liquid, and the like can be discharged from the tip of the sheath (Patent Documents 1, 2, and 3).
JP 6-98140 JP-A-4-146741 JP 2001-327512 A

  However, all of the conventional forceps for endoscopes described in Patent Documents 1, 2, and 3 cause the liquid discharged from the distal end of the sheath to hit the drive arm and discharge water only to the side or obliquely forward. Therefore, the affected part could not be washed with the cleaning liquid with the tip forceps piece facing the target affected part, which was very inconvenient.

  Therefore, the present invention provides an endoscopic forceps that can easily clean a target affected area with a cleaning liquid when a tip forceps piece that opens and closes in a bowl shape around a support shaft is directly facing the target affected area. The purpose is to do.

  In order to achieve the above object, the forceps for endoscope according to the present invention has a driving arm integrally connected to the rear portion of each of the pair of distal forceps pieces, and the driving arm is a boundary portion with the distal forceps piece. In the vicinity, the distal forceps piece is supported by the distal end portion of the sheath so as to be rotatable around the support shaft, and is inserted and disposed in the sheath and the distal end is connected to the driving arm. In an endoscopic forceps that rotates around a support shaft and is driven to open and close like a bowl, a liquid supply tube is inserted through the sheath in parallel with the operation wire, and the liquid supply tube The outlet opening is disposed straight forward from a position in front of the support shaft so that the water discharged from the outlet opening of the liquid feeding tube is directed to the space between the pair of distal forceps pieces.

  The support shafts are a pair of support shafts that are arranged in series with a space therebetween and individually support one of the pair of drive arms, and the liquid feeding tube is disposed at an axial position near the distal end of the sheath. As it is, it may extend straight to the front position through a pair of spindles.

  In that case, the tube tip holding member that holds the tip portion of the liquid feeding tube may be supported by the tip portion of the sheath by a pair of support shafts, and more specifically, the tip attached to the tip of the sheath. The tip of the support frame is formed in a shape divided by a slit, a tube tip holding member is arranged inside the tip of the slit, and one end side of the support shaft is fixed to the tip support frame. A tube tip holding member may be supported on the other end side.

  According to the present invention, since the water discharged from the outlet opening of the liquid feeding tube goes straight to the space between the pair of tip forceps pieces, the tip forceps piece that opens and closes like a bowl is in a state of facing the target affected area. The target affected area can be easily cleaned by spraying a cleaning solution or the like.

  The liquid feeding tube is inserted in the sheath over the entire length in parallel with the operation wire, placed at the axial position near the tip of the sheath, and straightly extended to the front position from the support shaft, and the outlet opening of the liquid feeding tube Is placed straight forward from a position in front of the spindle.

Embodiments of the present invention will be described with reference to the drawings.
FIG. 5 shows an endoscopic forceps used for hemostasis, tissue collection, and the like through a treatment instrument insertion channel of an endoscope.

  An operation wire 2 is inserted through the entire length of the flexible sheath 1 so as to be movable back and forth in the axial direction, and the distal end side of the flexible sheath 1 is moved forward and backward in the axial direction from the hand side. The pair of distal forceps pieces 3 arranged in the above are opened and closed in a hook shape.

  The operation unit 20 disposed at the proximal end of the flexible sheath 1 has a slide operation in which the proximal end of the operation wire 2 is coupled to the operation unit main body 21 coupled to the proximal end of the flexible sheath 1. The member 22 is slidably disposed.

  In addition, a water injection port 23 for injecting a liquid such as a cleaning solution by a syringe cylinder (not shown) is provided on the side surface of the operation unit main body 21 and is connected to the water injection port 23, for example, ethylene tetrafluoride. A liquid feeding tube 10 made of a resin tube is inserted through the entire length of the flexible sheath 1 in parallel with the operation wire.

  1 is a side sectional view of a distal end portion of an endoscopic forceps, FIG. 2 is a front sectional view thereof, and FIGS. 3 and 4 are sectional views taken along lines III-III and IV-IV in FIG. The sheath 1 is configured by covering a coil pipe 1a made of stainless steel wire with an electrically insulating flexible tube 1b. However, it may be configured only with a coil pipe or a flexible tube.

  The distal end support frame 4 connected and fixed to the distal end of the flexible sheath 1 is formed in a shape in which a front end portion thereof is largely divided by a slit 41 and is integrally formed with the rear portion of the pair of distal forceps pieces 3. The connected drive arm 5 is disposed in the slit 41.

  In the vicinity of the distal end of the distal end support frame 4, a pair of support shafts 9 whose one end side is fixedly supported by the distal end support frame 4 in a cantilever state project into the slit 41 from both the left and right sides. Each spindle 9 is loosely passed through a hole formed in the vicinity of the boundary portion between the driving arm 5 and the distal forceps piece 3.

  As the operation wires 2, two wires made of a stranded wire or a single wire made of stainless steel wire are arranged along the liquid feeding tube 10 in the flexible sheath 1, and the tips of the operation wires 2 are flexible. It protrudes forward from the tip of the sheath 1 and engages with a small hole 6 formed in each of the vicinity of the rear ends of the pair of drive arms 5.

  As a result, when the operation wire 2 is advanced and retracted in the operation unit 20, the drive arm 5 connected to the distal end of the operation wire 2 rotates about the support shaft 9, whereby the distal forceps piece 3 centers on the support shaft 9. Open and close like a bowl.

  In the vicinity of the distal end of the flexible sheath 1, the liquid supply tube 10 inserted and disposed over the entire length in the flexible sheath 1 is disposed at the axial position of the flexible sheath 1 as shown in FIG. 4. .

  The distal end portion of the liquid feeding tube 10 extends straight into the slit 41 of the distal end support frame 4 as it is, and the distal end of the liquid feeding tube 10 is transferred to the tube distal end holding member 8 supported from the left and right sides by the pair of support shafts 9. The part is held.

  The tube tip holding member 8 in which a through hole for holding the tube tip holding member 8 is formed at the center position is a pair of supports whose outer end portions are fixedly supported by the tip support frame 4 as shown in FIG. The inner end portion of each shaft 9 is supported at the center of the tip of the slit 41.

  As a result, the outlet opening 10a of the liquid feeding tube 10 is arranged straight forward from the axial position of the tip support frame 4 slightly ahead of the support shaft 9, and as shown in FIG. Since the water discharged from the opening 10a is directed to the space between the pair of distal forceps pieces 3, when the distal forceps piece 3 is opened facing the target affected area 100, the cleaning liquid is easily sprayed onto the target affected area 100. Can be washed.

It is side surface sectional drawing of the front-end | tip part of the forceps for endoscopes of the Example of this invention. It is front sectional drawing of the front-end | tip part of the forceps for endoscopes of the Example of this invention. It is the III-III sectional view in Drawing 2 of the forceps for endoscopes of the example of the present invention. It is IV-IV sectional drawing in FIG. 2 of the forceps for endoscopes of the Example of this invention. It is a whole block diagram of the forceps for endoscopes of the Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Flexible sheath 2 Operation wire 3 Tip forceps piece 4 Tip support frame 5 Drive arm 8 Tube tip holding member 9 Support shaft 10 Liquid supply tube 10a Outlet opening 41 Slit

Claims (4)

A driving arm is integrally connected to the rear portion of each of the pair of distal forceps pieces, and the driving arm is rotatable around a support shaft at the distal end portion of the sheath in the vicinity of the boundary portion with the distal forceps piece. By operating an operation wire supported and inserted in the sheath and having a distal end connected to the drive arm in the axial direction, the distal forceps piece rotates around the support shaft in a bowl shape. In the endoscopic forceps that are driven to open and close,
In the sheath, a liquid feeding tube is inserted and arranged over the entire length in parallel with the operation wire, and an outlet opening of the liquid feeding tube is disposed straight forward from a position in front of the support shaft, and the liquid feeding tube is disposed. An endoscopic forceps characterized in that water discharge from an outlet opening of a liquid tube is directed to a space between the pair of tip forceps pieces. The support shafts are a pair of support shafts that are arranged in series with a space therebetween and individually support one of the pair of drive arms, and the liquid feeding tube is disposed at an axial position near the distal end of the sheath. 2. The endoscopic forceps according to claim 1, wherein the forceps for endoscope passes straight between the pair of support shafts and extends to a front position thereof. The endoscopic forceps according to claim 2, wherein a tube tip holding member that holds a tip portion of the liquid feeding tube is supported on the tip portion of the sheath by the pair of support shafts. The tip end portion of the tip support frame attached to the tip of the sheath is formed in a shape divided by a slit, and the tube tip holding member is disposed inside the tip end portion of the slit so that the tip support is provided. The endoscopic forceps according to claim 3, wherein the tube tip holding member is supported on the other end side of each of the support shafts, one end side of which is fixed to a frame.

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