JP2005230082A - Over-tube for endoscope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an over-tube for an endoscope permitting securely holding movement of an over-tube body in the axial direction and improving the operability. <P>SOLUTION: This over-tube for the endoscope is inserted into an insertion part 2 of the endoscope from outside and movable forward/backward in the axial direction. The over-tube body 12 has a mouthpiece 34 set in the outside of the over-tube body 12, movable forward/backward in the axial direction, to be fixed as a holder to the body of a subject. A fixing means for fixing the mouthpiece 34 and the over-tube body 12 at arbitrary positions is mounted on at least either one of the mouthpiece 34 and the over-tube body 12. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an endoscope overtube of an endoscope system that is inserted into a body cavity orally or transanally and observed inside the body cavity.

  As a procedure for inserting a medical endoscope into a deep digestive tract cavity in a body cavity, for example, the small intestine, there are a case where it is inserted orally and a case where it is inserted transanally. In any case, since the intestinal tract is bent flexibly, even if the insertion part of the endoscope is pushed out of the body cavity, the force is not easily transmitted to the distal end part of the insertion part, and it is difficult to insert it deeply. is there.

  Therefore, an endoscope tube is provided at the distal end portion of the endoscope so that the insertion portion of the endoscope can be smoothly inserted into a complicatedly bent intestine, and an overtube (externally inserted into the endoscope insertion portion) A double-balloon endoscope system in which an overtube balloon is provided at the tip of a sliding tube is known (for example, see Patent Document 1).

  This is because after inserting the overtube that serves as a guide when inserting the endoscope insertion portion into the deep part to the deep part of the intestine, the overtube balloon is inflated to fix the overtube balloon to the intestinal tract. In this state, by retracting the overtube, the intestinal tract is bent to insert the endoscope insertion portion deeper.

Also, when the overtube balloon is inflated and the overtube is fixed to the intestinal tract, the balloon is made of a soft material such as latex so as not to place a burden on the intestinal tract and the internal pressure of the balloon is measured. Thus, there is also known one that can control the pressure (see, for example, Patent Documents 2 and 3).
JP 11-290263 A JP 2001-340462 A JP 2002-301019 A

  However, Patent Documents 1 to 3 all have a structure in which an overtube that can be moved back and forth in the axial direction of the endoscope insertion portion is externally fitted. Therefore, in the process of inserting into the small intestine or the like, when the length of the small intestine is reduced to shorten the length, it may be necessary to pull the overtube to the proximal side and hold it in that state.

  In this case, in addition to the operator who operates the endoscope, it is necessary for the assistant to grasp the overtube in order to pull the overtube toward the hand side and hold it in this state. Necessary. In addition, even if the assistant holds the overtube, it is difficult to fix the overtube at that position, and there is a problem that a shift in the relative position with respect to the endoscope insertion portion cannot be avoided.

  This invention has been made paying attention to the above circumstances, and the purpose thereof is to reliably hold the movement of the overtube main body in the axial direction and improve operability. An object of the present invention is to provide an endoscope overtube that eliminates the need for an assistant.

  In order to achieve the above object, the present invention provides an overtube for an endoscope that is externally inserted into an endoscope insertion portion and is movable back and forth in the axial direction. A holding means that is externally fitted in the axial direction of the tube main body and is fixed to the subject's body and is fixed to at least one of the holding portion and the overtube main body at an arbitrary position. Is provided.

  A second aspect of the present invention provides an endoscope overtube that is extrapolated to an endoscope insertion portion and is capable of moving forward and backward in an axial direction, and at least one of the overtube main body and the endoscope at an arbitrary position. A fixing means for fixing is provided.

  A third aspect of the present invention is characterized in that the holding part of the first aspect is a mouthpiece to be attached to the subject.

  According to a fourth aspect of the present invention, the mouthpiece of the third aspect is provided with a fixing portion that is fixed to the subject.

  A fifth aspect is characterized in that a balloon is provided at a distal end of the overtube body according to the first or second aspect.

  A sixth aspect is characterized in that the proximal end side of the overtube main body according to the first or second aspect is harder than the distal end side.

  According to this invention, the axial movement of the overtube main body can be reliably held by fixing the overtube main body to the holding portion fixed to the body of the subject or fixing to the endoscope. The operability can be improved, and an assistant is not required.

  Embodiments of the present invention will be described below with reference to the drawings.

  1 to 6 show a first embodiment, FIG. 1 is an exploded side view of the entire double balloon endoscope, and FIG. 2 is a partially longitudinal side view of an assembled state of the double balloon endoscope. 3 is a perspective view of the hand side of the double balloon endoscope, FIG. 4 is a perspective view of the mouthpiece, a longitudinal side view of the mouthpiece of FIG. 5, and FIG.

  As shown in FIGS. 1 to 3, for example, an endoscope 1 for a small intestine has an elongated flexible insertion portion 2, and a bending portion 3 is interposed at a distal end (tip side) of the insertion portion 2. The tip structure portion 4 is provided. An operation portion 6 having a grip portion 5 is provided at a proximal end (base end side) of the insertion portion 2, and a universal cord 8 having a connector 7 at the distal end is connected to the operation portion 6. .

  The insertion portion 2 is provided with a forceps channel, the distal end configuration portion 4 is provided with an observation optical system such as an illumination optical system and a solid-state imaging device, and a forceps port (none of which is shown) communicating with the forceps channel. 6 is connected to the treatment instrument insertion port 9. The operation section 6 is provided with an angle operation knob 10 for bending the bending section 3, and the bending section 3 can be bent by pushing and pulling an angle wire (not shown).

  The insertion portion 2 is provided with an endoscope overtube 11 that is extrapolated to the insertion portion 2, and an endoscope balloon that is attached to the distal end constituting portion 4 of the endoscope 1 is attached to the overtube body 12. A guide line 15 through which a first air supply tube 14 as an air supply line for supplying air to 13 is inserted is provided.

  The endoscope balloon 13 has an annular cavity portion 13b having an inner peripheral portion 13a that is closely fitted to the outside from the distal end constituting portion 4 to the curved portion 3 of the endoscope 1, and this circular shape 13b. The distal end of the first air supply tube 14 is connected to the annular cavity 13b. The first air supply tube 14 is made of, for example, polytetrafluoroethylene or the like, and the guide pipe line 15 is made of, for example, silicon or the like. That is, the first air supply tube 14 is harder than the guide conduit 15 so that the first air supply tube 14 can smoothly advance and retreat inside the guide conduit 15.

  The overtube main body 12 is a tube made of a synthetic resin material that is externally inserted into the insertion portion 2 of the endoscope 1 and has flexibility so as to be movable back and forth in the axial direction. An overtube balloon 16 made of rubber or a soft synthetic resin material is provided at the distal end of the overtube body 12, and a gripping portion 17 made of a relatively hard short tube is provided at the proximal end. Further, the distal end of the second air supply tube 18 is connected to the overtube balloon 16, and the second air supply tube 18 is attached to the outer portion of the overtube body 12, and It extends to the proximal end side.

  The guide line 15 extends to the proximal end of the overtube body 12, and the second air supply tube 18 is provided to extend further to the operation unit 6 side than the proximal end of the overtube body 12. A male connection port 19 is provided at the proximal end of the second air supply tube 18.

  A connection tube 21 is connected to the proximal end of the first air supply tube 14 via a connection tube body 20. A first air supply tube 14 is connected to one end of the connection tube 20, and a connection tube 21 is connected to the other end. The connection tube 21 is provided with a female connection port 27.

  Further, the intermediate portion of the connection tube body 20 is fitted to a rubber coupling member 25 connected to the treatment instrument insertion port 9 of the operation portion 6. Therefore, the attachment position on the proximal end side of the first air supply tube 14 is provided via the connecting member 25 in the treatment instrument insertion port 9 provided on a substantially extension line of the insertion portion 2 of the endoscope 1. . That is, the first air supply tube 14 is extended along the axial direction of the overtube main body 12, and the attachment position thereof is on the distal end side with respect to the grip portion 5 of the operation portion 6 of the endoscope 1 and the insertion portion. 2 on the proximal end side.

  A first tube 29 and a second tube 30 connected to a pump body (not shown) are led out to a pump device 28 as an air supply source shown in FIG. The first tube 29 is provided with a male side connection port 31 connected to the female side connection port 27 of the first air supply tube 14, and the second tube 30 is provided with the male side of the second air supply tube 18. A female side connection port 32 connected to the connection port 19 is provided. Reference numeral 33 denotes a remote controller for remotely operating the pump device 28, and a foot switch may be used instead of the remote controller 33.

  The provision of the male connection port 31 in the first tube 29 and the female connection port 32 in the second tube 30 means that the first tube 29 is definitely connected to the female side of the first air supply tube 14. The second tube 30 is connected to the port 27 and is connected to the male side connection port 19 of the second air supply tube 18. That is, even if it tries to connect the 1st tube 29 to the 2nd air supply tube 18 accidentally, it will become the male side connection port 31 and the male side connection port 19, and it cannot connect and can prevent a misconnection. it can. The first tube 29 and the first air supply tube 14 may be the same color, the second tube 30 and the second air supply tube 18 may be the same color, and the connection ports are the same color. Can also prevent misconnection.

  As shown in FIGS. 4 and 5, a mouthpiece 34 as a holding portion is externally fitted to the proximal end of the overtube main body 12 so as to advance and retract in the axial direction. The mouthpiece 34 is made of a synthetic resin material and is a tubular body having an inner diameter that can be fitted to the overtube body 12. The male screw portion 35 is provided at one end, and a patient as a subject is mouthed at the other end. A barrel portion 36 is provided. Further, a flange portion 37 is integrally provided at an intermediate portion of the mouthpiece 34, and one end portion of a binding band 38 as a fixing means is connected to one end portion of the flange portion 37.

  The binding band 38 is a belt-like body having a length capable of making one round of the patient's head, and is provided with a plurality of engagement holes 39. Further, an engaging pin 40 is selectively provided at the other end of the flange portion 37 so that the engaging hole 39 is selectively engaged. The mouthpiece 34 can be fixed to the patient's body by attaching the binding band 38 to the patient's head while the patient holds the tube 36 of the mouthpiece 34 with the mouth.

  Further, the male thread portion 35 of the mouthpiece 34 is provided with a tightening ring 42 having a female thread portion 41 that is screwed therewith. An O-ring 43 made of rubber or the like is interposed between the tightening ring 42 and the end face of the tubular body having the male screw portion 35. Accordingly, when the tightening ring 42 is turned and the female screw portion 41 is deeply screwed into the male screw portion 35, the O-ring 43 is crushed and the inner diameter is reduced, so that the overtube body 12 can be pressed and fixed from the outer periphery. It has become. That is, a fixing means for fixing the overtube body 12 to the mouthpiece 34 and preventing the overtube body 12 from moving back and forth in the axial direction is configured.

  Next, the operation of the double balloon endoscope will be described.

  FIG. 6 shows a procedure in which a double balloon endoscope is orally inserted into the small intestine to observe the inner wall of the intestinal tract, where a is the esophagus, b is the stomach, and c is the small intestine. First, the tube part 36 of the mouthpiece 34 is put into the patient's mouth, the tube part 36 is held by the mouth, and the mouthpiece 34 is fixed to the patient's head by the binding band 38.

  The tightening ring 42 of the mouthpiece 34 is in a state where the female thread portion 41 is shallowly screwed into the male thread portion 35, and the inner diameter portion of the O-ring 43 is in a state where it is in light contact with or has a gap with the outer peripheral surface of the overtube body 12. On the other hand, the overtube main body 12 is inserted into the insertion portion 2 of the endoscope 1, and the air in the endoscope balloon 13 and the overtube balloon 16 is extracted to be in a contracted state.

  Next, as shown in FIG. 6A, the insertion portion 2 of the endoscope 1 is inserted into the body cavity from the patient's mouth, and the bending portion 3 is operated by operating the angle operation knob 10 of the operation portion 6. The insertion part 2 is inserted into the small intestine c through the esophagus a and the stomach b. And when the front-end | tip structure part 4 of the insertion part 2 of the endoscope 1 passes the duodenum, for example, the remote controller 33 is operated and the pump apparatus 28 is driven.

  As shown in FIG. 6B, when the endoscope balloon 13 is inflated by supplying air from the first tube 29 to the endoscope balloon 13 via the first air supply tube 14. The endoscope balloon 13 is pressed against the inner wall of the small intestine c, and the distal end constituting portion 4 of the endoscope 1 is fixed to the small intestine c. In this state, when the gripping portion 17 of the overtube main body 12 is gripped and the overtube main body 12 is advanced along the insertion portion 2, the distal end of the overtube main body 12 becomes the rear end portion of the endoscope balloon 13. Led up to.

  Next, as shown in FIG. 6C, when the remote controller 33 is operated again to supply air from the pump device 28 to the second tube 30, the second tube 30 passes through the second air supply tube 18. Thus, air is supplied to the overtube balloon 16. Accordingly, the overtube balloon 16 is inflated and pressed against the inner wall of the small intestine c, and the distal end of the overtube body 12 is fixed. In this state, when the gripping portion 17 of the overtube main body 12 is gripped and the overtube main body 12 is retracted integrally with the insertion portion 2 of the endoscope 1, it is inserted together with the overtube main body 12 by the tensile force. Since the radius of curvature of the portion 2 is large and is in a substantially straight state, it is possible to shorten the small intestine c by removing excessive bending of the small intestine c.

  At this time, when the operator turns the fastening ring 42 of the mouthpiece 34 and deeply engages the female screw portion 41 with the male screw portion 35, the O-ring 43 is crushed and the inner diameter is reduced, whereby the overtube body 12 is The presser is fixed from the outer periphery. Accordingly, the overtube body 12 is fixed to the mouthpiece 34, and the overtube body 12 can be prevented from moving back and forth in the axial direction. That is, the overtube main body 12 can be fixed to the mouthpiece 34 without the assistant holding the grip portion 17 of the overtube main body 12.

  Next, as shown in FIG. 6 (D), when the endoscope balloon 13 is deflated by extracting air, the insertion portion 2 of the endoscope 1 is pushed toward the deep portion of the small intestine c. 2 is inserted toward the deep part of the small intestine c while being guided by the overtube body 12.

  And when the front-end | tip structure part 4 of the insertion part 2 of the endoscope 1 advanced to the desired position of the small intestine c, as shown in FIG.6 (E), it returns to the 1st air supply tube from the 1st tube 29 again. Air is supplied to the endoscope balloon 13 via 14 to inflate the endoscope balloon 13 and press the endoscope balloon 13 against the inner wall of the small intestine c to fix the distal end constituting portion 4.

  In this state, the overtube balloon 16 is deflated by removing the air, and further, the tightening ring 42 of the mouthpiece 34 is turned so that the female screw portion 41 is shallowly engaged with the male screw portion 35. The diameter of the portion is increased, and the overtube main body 12 is movable in the axial direction. The surgeon grasps the grasping portion 17 of the overtube main body 12 and advances the overtube main body 12 along the insertion portion 2. Then, when the distal end of the overtube main body 12 reaches the rear end of the endoscope balloon 13, the overtube balloon 16 is expanded again as shown in FIG. 6 (F).

  By repeating this operation, the distal end constituting portion 4 of the endoscope 1 can be inserted to the deep portion of the small intestine c. Moreover, since the overtube main body 12 can be fixed to the mouthpiece 34, the relative positional relationship between the overtube main body 12 and the insertion portion 2 of the endoscope 1 is not shifted, and the operability can be improved. Further, although the fixing means for fixing the overtube main body 12 to the mouthpiece 34 is provided, the fixing means for fixing the mouthpiece 34 to the overtube main body 12 may be provided.

  FIG. 6 shows a procedure for orally inserting a double balloon endoscope into the small intestine, but basically the same applies when the double balloon endoscope is inserted transanally into the small intestine through the large intestine. It is.

  FIG. 7 shows a second embodiment, and the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted. FIG. 7 shows the endoscope 1 provided with fixing means for fixing the overtube body 12. That is, a fixing member 44 is provided at the proximal end of the overtube body 12. The fixing member 44 is made of a synthetic resin material and is a tubular body having an inner diameter that can be externally fitted to the insertion portion 2 of the endoscope 1. The male screw portion 45 is provided at one end portion and the flange portion 46 is provided at the other end portion. It has been.

  The male thread part 45 of the fixing member 44 is provided with a tightening ring 48 having a female thread part 47 that is screwed with the male thread part 45. An O-ring 49 made of rubber or the like is interposed between the tightening ring 48 and the end face of the tubular body having the male screw portion 45. An annular recess 50 is provided in the inner peripheral portion of the tightening ring 48, and the annular protrusion 50 of the fastening portion 51 provided at the joint portion between the operation portion 6 and the insertion portion 2 of the endoscope 1. 52 is engaged.

  Therefore, by fixing the fixing member 44 provided at the proximal end of the overtube body 12 to the folding portion 51 of the endoscope 1 via the tightening ring 48, the overtube body 12 with respect to the endoscope 1. And the overtube main body 12 can be prevented from moving back and forth in the axial direction. That is, even if the endoscope 1 is hung on a hanger or the like integrally with the endoscope overtube 11, the endoscope overtube 11 does not come off and fall.

  Also, during endoscopy, when the operator turns the fastening ring 48 of the overtube body 12 and deeply engages the female screw portion 47 with the male screw portion 45, the O-ring 49 is crushed and the inner diameter is reduced, As a result, the O-ring 49 is pressed against the overtube body 12 and fixed to the insertion portion 2. Therefore, since the endoscope overtube 11 can be fixed at an arbitrary position during the examination, the examination is not hindered.

  FIG. 8 shows a third embodiment, and the same components as those of the first embodiment are denoted by the same reference numerals and description thereof is omitted. FIG. 8A is a longitudinal side view of the distal end of the overtube body, and FIG. 8B is a cross-sectional view taken along the line AA. A soft cylinder 53 made of rubber or a synthetic resin material is provided at the distal end of the overtube main body 12, and the flexible cylinder 53 has a taper that tapers toward the tip. A plurality of ribs 54 are provided in the axial direction on the inner peripheral surface of the flexible cylindrical body 53, and these ribs 54 are provided in contact with the outer peripheral surface of the insertion portion 2 of the endoscope 1.

  By providing the ribs 54 on the flexible cylindrical body 53 in this way, it is possible to prevent the mucous membrane from being caught when pushing the overtube body 12 forward, and to reduce the frictional resistance between the insertion portion 2 and the flexible cylindrical body 53. 2 and the overtube body 12 can be smoothly moved relative to each other in the axial direction.

  FIG. 9 shows a fourth embodiment, and the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted. FIG. 9 is a side view of the proximal end of the overtube main body 12, and a gripping portion 17 provided at the proximal end of the overtube main body 12 is provided with a tongue-like finger hook portion 55 protruding upward. . Therefore, when the operator pulls the overtube main body 12 toward the hand side and holds the state, the operator can prevent the movement of the overtube main body 12 in the axial direction by hooking the index finger 56 on the finger hook portion 55. That is, the overtube main body 12 can be fixed without the supporter holding the grip portion 17 of the overtube main body 12.

  FIG. 10 shows a fifth embodiment, and the same components as those of the first embodiment are denoted by the same reference numerals and description thereof is omitted. FIG. 10 is a longitudinal side view of the overtube body 12, and a base 57 is provided at the base end of the overtube body 12. An O-ring 58 is provided on the inner peripheral surface of the base 57, and the O-ring 58 is in light contact with the insertion portion 2 of the endoscope 1.

  The base 57 is provided with an air supply port 59 and communicates with the lumen of the overtube body 12. The air supply port 59 is connected to an air supply source (not shown) via an air supply tube or the like so that air can be discharged from the distal end of the overtube body 12.

  As described above, when the overtube body 12 is pushed forward, air is discharged from the distal end of the overtube body 12, thereby preventing the mucous membrane from being caught and reducing the frictional resistance between the insertion portion 2 and the flexible cylinder 53. The relative movement in the axial direction between the insertion portion 2 and the overtube main body 12 can be smoothly performed.

  FIG. 11 shows a sixth embodiment, and the same components as those of the first embodiment are denoted by the same reference numerals and description thereof is omitted. FIGS. 11A and 11B are views showing a state in which the insertion portion 2 of the endoscope 1 is orally inserted into the small intestine c via the esophagus a and the stomach b using the overtube as a guide. In this embodiment, about 90 cm of the distal end side 12a of the overtube main body 12 is made soft and the proximal end side 12b is made hard. As a means for making the proximal end side 12b of the overtube main body 12 hard, the material of the overtube main body 12 may be a hard material, or a coating layer may be provided to make it hard.

  As shown in FIG. 11 (A), after the distal end constituting portion 4 of the endoscope 1 is inserted to a desired position of the small intestine c, the overtube balloon 16 is inflated, and the distal end of the overtube main body 12 is moved to the small intestine. Secure to the inner wall of c. Next, as shown in FIG. 11 (B), the overtube main body 12 is pulled toward the hand side to remove the deflection of the small intestine c and shorten the small intestine c. In this state, when the proximal end of the insertion portion 2 of the endoscope 1 is held and pushed further deeply, the proximal end side 12b of the overtube body 12 is hard, so that the holding force for holding the insertion portion 2 is increased. The insertion portion 2 can be pushed forward smoothly. Moreover, if the proximal end of the insertion part 2 is made soft, handling of the long insertion part 2 becomes easy.

  According to each of the embodiments, the following configuration is obtained.

  (Appendix 1) An endoscope overtube that is extrapolated to an endoscope insertion portion and is movable forward and backward in the axial direction, and is fitted over the overtube body so as to be movable forward and backward in the axial direction of the overtube main body. An endoscope over, characterized in that a holding portion is provided to be fixed to the body of the subject, and at least one of the holding portion and the overtube body is provided with a fixing means for fixing both at an arbitrary position. tube.

  (Additional remark 2) The said fixing means is provided in the said holding | maintenance part, crushes an O-ring with a clamp ring, and fixes an overtube main body by the elastic deformation of the diameter reduction direction of the O-ring. End tube for endoscope.

  (Supplementary note 3) An endoscope overtube that is extrapolated to the endoscope insertion portion and can be moved back and forth in the axial direction, and is fixed to at least one of the overtube body and the endoscope at an arbitrary position. An overtube for an endoscope, characterized in that a fixing means is provided.

  (Appendix 4) The endoscope overscope according to Appendix 3, wherein the fixing means is a fixing member provided in the overtube body and having an engaging portion that engages with a folding portion of the endoscope. tube.

  (Supplementary note 5) The endoscope overtube according to supplementary note 3, wherein the fixing means is provided at a proximal end of the overtube main body and is a finger-hanging portion on which an operator can put a finger.

  (Additional remark 6) The overtube for endoscopes of Additional remark 1 or 3 characterized by having the rib which contacts the outer peripheral surface of the insertion part of an endoscope in the distal end of the said overtube main body.

  (Supplementary note 7) The proximal end of the overtube main body is provided with an air supply portion communicating with the lumen of the overtube main body, and air is discharged from the distal end of the overtube main body. 3. The endoscope overtube according to 3.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Moreover, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine suitably the component covering different embodiment.

1 is an exploded side view of an entire double-balloon endoscope showing a first embodiment of the present invention. The longitudinal side view of the assembly state of the double balloon type endoscope of the embodiment. The perspective view of the hand side of the double balloon type endoscope of the embodiment. The perspective view of the mouthpiece which shows the embodiment. The longitudinal section side view of the mouthpiece which shows the embodiment. The same embodiment is shown, (A)-(F) is an operation explanatory view of a double balloon type endoscope. The 2nd Embodiment of this invention is shown, and the vertical side view of the proximal end of an overtube main body. The 3rd Embodiment of this invention is shown, (A) is a vertical side view of the distal end of an overtube, (B) is a sectional view which meets an AA line. The side view of the proximal end of the overtube main body which shows 4th Embodiment of this invention. The 5th Embodiment of this invention is shown, and the vertical side view of an overtube main body. The 6th Embodiment of this invention is shown, (A) (B) is the figure of the state which inserted the endoscope insertion part into the small intestine orally by using an overtube as a guide.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Endoscope, 2 ... Insertion part, 3 ... Bending part, 4 ... Tip structure part, 6 ... Operation part, 12 ... Overtube main body, 13 ... Endoscope balloon, 16 ... Overtube balloon, 34 ... Mouthpiece (holding part)

Claims (6)

An endoscope overtube that is extrapolated to an endoscope insertion portion and is movable back and forth in the axial direction.
The overtube main body is provided with a holding portion that is externally fitted in the axial direction of the overtube main body and is fixed to the body of the subject, and the holding tube and at least one of the overtube main body are both arbitrarily provided. An overtube for an endoscope, comprising a fixing means for fixing at the position. An endoscope overtube that is extrapolated to an endoscope insertion portion and is movable back and forth in the axial direction.
An overtube for an endoscope, characterized in that at least one of the overtube main body and the endoscope is provided with fixing means for fixing both at an arbitrary position.   The endoscope overtube according to claim 1, wherein the holding portion is a mouthpiece attached to the subject.   The endoscope overtube according to claim 3, wherein a fixing portion for fixing the mouthpiece to the subject is provided.   The endoscope overtube according to claim 1 or 2, wherein a balloon is provided at a distal end of the overtube body.   The endoscope overtube according to claim 1 or 2, wherein the overtube body has a proximal end harder than a distal end.

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