JP2011072412A - Guide tube for guiding endoscope insertion part, and method for endoscopic inspection using the guide tube - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a guide tube for guiding an endoscope insertion part, and a method for endoscopic inspection using the guide tube, in which endoscopic observation of a part of interest can be favorably performed through deteriorated environments without letting oil, waste, sludge, dust, etc., to attach to an observation window or an illumination window provided on the endoscope insertion part. <P>SOLUTION: The guide tube for guiding an endoscope insertion part includes a tube member and an intrusion preventing member. The tube member includes an axial through-hole in which the endoscope insertion part is insertable, and it has such resiliency that a bending habit part can be provided at a desired part on the base end side over a tip surface. The intrusion preventing member prevents intrusion of liquid, deposited matter, or floating matter into the axial through-hole as it is inserted to the axial through-hole. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an endoscope used when observing a region of interest located in front of an area where liquid, deposits, etc., which deteriorate the observation performance of an endoscope by adhering to an observation window or an illumination window. The present invention relates to a guide tube for guiding a mirror insertion portion, and an endoscopic inspection method using the guide tube.

  In recent years, endoscopes having an elongated insertion portion are used in the medical field, the industrial field, and the like. Endoscopes used in the medical field are used for observation, examination, treatment, and the like of various organs in the body.

  On the other hand, endoscopes used in the industrial field are used for observation, inspection, etc. of damage, corrosion, etc. of boilers, turbines, engines, chemical plants and the like. In addition, endoscopes used in the industrial field observe the inside of a closed space to save lives in the event of disasters such as earthquakes and landslides, collapse of buildings due to accidents, collapse of vehicles, etc. It is also used for.

  The endoscope includes an observation window and an illumination window, and an observation image of an observation site illuminated by illumination light emitted from the illumination window is imaged on, for example, an imaging surface of the image sensor through the observation window, and photoelectric conversion is performed by the image sensor. A video signal is generated by transmitting the image signal of the observed image to the image signal processing unit. The generated video signal is output to a monitor, and an endoscopic image is displayed on the screen of the monitor so that endoscopic observation can be performed.

  During endoscopic observation, if blood or dirt adheres to the endoscope observation window or illumination window, or deposits such as opaque liquid, sludge, sludge, etc. that have viscosity such as oil adhere to it. It is difficult to obtain a good endoscopic image due to problems such as a reduction in the amount of illumination light emitted to the observation site or a blocking of the imaging surface.

  In an endoscope used in the medical field, in order to prevent a good endoscopic image from being obtained due to blood or dirt attached to the observation window or the illumination window, an air / water supply nozzle ( Also referred to as a cleaning nozzle). The air / water supply nozzle, for example, ejects water and air toward the observation window and the illumination window, and rinses or blows away blood adhering to the window to ensure a good endoscopic image.

  In an endoscope used in the industrial field, for example, in the case of a thin endoscope having a diameter of the insertion portion of the endoscope, for example, φ4 mm, it is difficult to provide an air / water supply nozzle. For this reason, when an endoscope is used to inspect oil pans, water pipes, or perform investigations in areas affected by dust, the insertion part accumulates oil and passes through gaps in rubble. In some cases, oil, dust, sludge, dust, or the like adheres to the observation window or the illumination window, making it impossible to obtain an endoscopic image for performing endoscopic observation before reaching the region of interest.

  Patent Document 1 discloses an endoscope device that can be inserted and observed up to a desired position even when a viscous substance is present therein, and a test object observation method in the viscous substance. According to this endoscope apparatus, by providing the supply means, the fluid guide tube, and the lid, even if a viscous substance exists inside, the observation means becomes difficult because the viscous substance adheres to the observation means. Therefore, the subject can be suitably observed by being inserted to a desired position.

JP 2008-262089 A

  However, the endoscope apparatus described in FIG. 1 of Patent Document 1 is an endoscope having an endoscope insertion portion, and a substantially tubular curve that is sheathed on the distal end side of the endoscope insertion portion as an insert. And a guide tube with a curved portion that can be operated. The guide tube has an endoscope insertion portion, a substantially tubular first fluid guide tube and a second fluid guide tube, and an operation member. The configuration is complicated, for example, the cap operation wire is inserted. For this reason, the insertion part of the endoscope is passed through a poor environment such as an opaque liquid, sludge, or sediment in an inexpensive and simple configuration, and is guided to the site of interest to observe the site of interest. There is a demand for an endoscope system that can satisfactorily perform.

  The present invention has been made in view of the above circumstances, and passes through a poor environment without oil, dust, sludge, dust and the like adhering to the observation window and the illumination window provided in the insertion portion of the endoscope. Thus, an object of the present invention is to provide a guide tube for guiding an endoscope insertion portion that can favorably perform endoscopic observation of a region of interest, and an endoscopic inspection method using the guide tube.

  The guide tube for guiding an endoscope insertion portion of the present invention has an axial through-hole through which the insertion portion of the endoscope can be inserted, and is provided with a bent collar portion at an arbitrary portion on the proximal side from the distal end surface. A tube body having a possible elasticity and an intrusion prevention member that prevents liquid, sediment, or suspended matter from entering the axial through hole in a state of being inserted into the axial through hole. It has.

The endoscope inspection method using the guide tube for guiding an endoscope insertion portion of the present invention has an axial through-hole through which the insertion portion of the endoscope can be inserted, and an arbitrary portion on the proximal side from the distal end surface In a state where the tube body having elasticity capable of providing a bent collar portion and a state in which the tube body is inserted into the axial through hole, liquid, sediment, or suspended matter enters the axial through hole. An endoscopy method using an endoscope insertion portion guide guide tube comprising an intrusion prevention member for preventing,
The intrusion prevention member is inserted into the through hole from the proximal end side opening of the axial through hole of the tube body, the intrusion prevention member is integrated with the tube body in a predetermined state, and the intrusion prevention member is integrated with the tube body. The tube body is introduced in the vicinity of the site of interest through a poor environment area with liquid, sediment, or suspended matter, and the intrusion prevention member is removed from the axial through-hole of the tube body, and the intrusion prevention member The insertion portion of the endoscope is inserted into the axial through hole of the tube body from which the tube has been removed, and the distal portion of the insertion portion is led out from the opening on the distal end side of the axial through hole, and the region of interest is observed. .

  According to this configuration and the inspection method, the intrusion prevention member is inserted into the axial through hole of the tube body, and the intrusion prevention member and the tube body are brought into a predetermined integrated state. Then, the tube body in which the intrusion prevention member is integrated is introduced to the vicinity of the site of interest through the poor environment region. After the introduction, the intrusion prevention member is removed from the axial through hole of the tube body, and the intrusion prevention member is removed. The insertion part of the endoscope is inserted into the axial through hole. Then, by guiding the insertion portion to the site of interest, endoscopic observation of the site of interest can be favorably performed.

  According to the present invention, the observation window provided in the insertion portion of the endoscope and the illumination window are allowed to pass through a poor environment without oil, dust, sludge, dust and the like adhering to the endoscope, and the endoscopic observation of the region of interest. It is possible to realize an endoscope insertion portion guiding guide tube that can perform the above-described operation and an endoscope inspection method using the guide tube.

1 to 10 relate to an embodiment of the present invention, and FIG. 1 is a diagram for explaining an endoscope system. The figure explaining the core which is a tube body which comprises the guide tube for endoscope insertion part guidance, and an intrusion prevention member The figure explaining the guide tube for endoscope insertion part guidance by which the metal core was inserted and arranged in the penetration hole of the tube body It is a figure explaining the effect | action of the guide tube for endoscope insertion part guidance, the schematic which shows the oil pan which is a work object, and the figure which shows the tube body and core metal which comprise the guide tube for endoscope insertion part guidance The figure which shows the guide tube for endoscope insertion part guidance comprised by inserting the metal core in the axial direction through-hole of a tube body inserted in an oil pan through a screw hole The figure explaining the situation which has inserted the guide tube into the oil pan through the screw hole The figure explaining the state where the tip of the guide tube reached the opposing inner surface The figure explaining the state of inserting the insertion part of an endoscope in the state of a bent collar part after extracting a metal core from a tube body, and the axial direction penetration hole from which the metal core was extracted. The figure explaining the condition where the insertion part is derived | led-out from the front end side opening of the tube body The figure explaining the condition which made the insertion part lead out to a different region of interest from the tip side opening of a tube body The figure explaining other composition of a guide pipe The figure explaining other structures of an intrusion prevention member The figure explaining another structure of an intrusion prevention member

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

As shown in FIG. 1, the endoscope system 1 includes an endoscope 2 and an endoscope insertion portion guide guide tube (hereinafter abbreviated as a guide tube) 3.
The endoscope 2 includes a device main body 4 connected to the endoscope 2 and an endoscope adapter (hereinafter simply referred to as an adapter) 5.

  The endoscope 2 includes an elongated and flexible thin insertion portion 6, an operation portion 7 having a grip portion 7 a provided on the proximal end side of the insertion portion 6, and a grip on the operation portion 7. The main part is composed of the universal cord 8 extended from the part 7a.

  The insertion portion 6 is configured by sequentially connecting a distal end portion 6a, a bending portion 6b that bends in the vertical and horizontal directions, and a flexible flexible tube portion 6c in order from the distal end side. A proximal end portion of the tube portion 6 c is connected to the operation portion 7. An imaging element such as a CCD or C-MOS is built in the distal end of the insertion portion 6.

  The bending operation lever 7b for bending the bending portion 6b is erected at a predetermined position of the operation portion 7 so as to be tiltable in at least four directions. The bending operation lever 7b pulls or relaxes a bending wire (not shown) inserted into the insertion portion 6 when the tilt direction is changed by the operator. That is, the bending portion 6b is operated in at least one of the four directions of the upward direction, the downward direction, the left direction, and the right direction by operating the bending wire by operating the bending operation lever 7b provided in the operation unit 7. Bends.

  In addition to the bending operation lever 7b, the operation unit 7 is provided with, for example, a brightness switch for adjusting the brightness of a display image (not shown), an image recording switch, an image still switch, and the like.

  The end portion of the universal cord 8 extending from the operation unit 7 is connected to the box-shaped device body 4. The apparatus main body 4 is covered with an exterior casing 4a, and an electric component (not shown) such as a CPU for image processing, a monitor 9 attached to the apparatus main body 4, and a motor ( A battery unit (not shown) for supplying power to an LED (not shown) provided in the adapter 5 is disposed.

  On the screen of the monitor 9, an endoscopic image captured by the imaging element of the endoscope 2 is displayed. In this embodiment, the monitor 9 is attached to the exterior casing 4a so as to be openable and closable. FIG. 1 shows a closed state, and a screen (not shown) faces one surface of the exterior casing 4a. The monitor 9 may be configured to be detachable from the exterior housing 4a.

  Reference numeral 10 denotes a belt which is detachably attached to the apparatus body 4 at, for example, two places in order to improve the portability of the apparatus body 4. Reference numeral 11 denotes rubber legs, which are provided at, for example, four locations on the exterior housing 4a for placing the apparatus main body 4 thereon.

  The adapter 5 is detachably attached to the distal end portion 6 a to constitute the insertion portion 6. The exterior of the adapter 5 is made of metal such as iron, titanium, and stainless steel, and an LED that is a light emitting element, an objective lens unit that forms an observation image on the imaging surface of the imaging element, and the like are disposed therein. .

As shown in FIGS. 1 and 2, the guide tube 3 of this embodiment includes a tube body 30 and a cored bar 20.
The core metal 20 is an intrusion prevention member, for example, a solid rod-shaped member made of stainless steel, and has a predetermined rigidity. The cored bar 20 includes a plug portion 21 on one end side. The plug portion 21 has, for example, a barrel shape in which the diameter of the central portion is the largest and the diameter gradually changes to a smaller diameter toward the distal end side and the proximal end side. The outer peripheral surface of the plug portion 21 is configured to be in close contact with the inner peripheral surface of an axial through hole (see reference numeral 31d in FIG. 2) described later.
The plug portion 21 is formed integrally with the core metal 20, or is provided by fixing a separate plug portion forming member 21 a integrally to the core metal 20 by screwing, bonding, welding, or the like.

  Reference numeral 22 denotes a cylindrical cored bar gripping member that is fixed to the other end of the cored bar 20 and constitutes a cored bar gripping part. The core metal gripping member 22 is made of resin or metal and has an axial through hole 22a. The other end of the core metal 20 is disposed in the axial through hole 22a and fixed integrally by bonding or the like. Configured.

The tube body 30 is configured by providing, for example, a tube gripping member 32 and a bending direction confirmation member 33 on a tube main body 31.
The tube main body 31 is made of, for example, urethane rubber, has a desired elasticity, and is provided with a predetermined R-shaped bent collar portion 31a on one end side. The tube body 31 includes an axial through hole 31d having openings 31b and 31c on one end surface and the other end surface, respectively. In the axial through hole 31d, as shown by the arrow Y2 in the figure, the insertion of the cored bar 20 having the plug portion 21 from the proximal end side opening 31c and the insertion portion 6 in which the adapter 5 is fixed to the distal end portion 5a are inserted. Is possible.

  In addition, it is supposed that the opening of 31 d of axial through-holes is provided in an end surface and an other end surface. However, the opening of the axial through hole 31d may be provided on the side portion on one end side or the side portion on the other end side.

  The bent collar portion 31a of the tube main body 31 is elastically deformed linearly by inserting the cored bar 20 through the axial through hole 31d as shown in FIG. The plug portion 21 of the cored bar 20 is arranged in the vicinity of the distal end side opening 31b, whereby the outer peripheral surface of the plug portion 21 is in close contact with the inner peripheral surface of the axial through hole 31d and closes the opening 31b.

  The bent collar portion 31a of the tube main body 31 appears again on one end side of the tube main body 31 as shown in FIG. 2 by removing the cored bar 20 from the axial through hole 31d.

  The tube gripping member 32 is disposed at the other end of the tube main body 31 to constitute a gripping portion. The tube gripping member 32 has a cylindrical shape and includes an axial through hole 32a. The other end of the tube main body 31 is disposed in the axial through hole 32a and is integrally fixed by bonding. The tube gripping member 32 is made of resin or metal.

  The bending direction confirmation member (hereinafter, abbreviated as confirmation member) 33 is made of resin or metal, for example, a rectangular parallelepiped shape. The confirmation member 33 has a recess 33a in which the end of the tube gripping member 32 is disposed at the center. Reference numeral 33b is a communication hole that communicates the recess 33a with the outside. The tube body 31 is disposed in the communication hole 33b. The tube main body 31 is fixed to the confirmation member 33 integrally by adhesion or the like after being adjusted so that the bent collar portion 31a faces, for example, the longitudinal direction in a state where the tube main body 31 is disposed in the communication hole 33b.

  In the present embodiment, as shown in FIG. 3, the distal end surface 22 b of the core metal gripping member 22 contacts the proximal end surface 32 a of the tube gripping member 32, so that the distal end side opening 31 b is desired by the plug portion 21. It is configured to be blocked in this state.

  Further, in the present embodiment, the cored bar 20 is configured to protrude from the distal end surface of the plug portion 21 toward the distal end side. However, the distal end surface of the plug part 21 and the distal end surface of the cored bar 20 may be in a surface-matched state, or the distal end surface of the cored bar 20 may be recessed from the distal end surface of the plugd part 21.

  Moreover, when the cored bar 20 is inserted into and extracted from the tube body 31, the ridgeline of the plug part 21 and the leading end ridgeline of the cored bar 20 protruding from the distal end surface of the plug part 21 are formed on the inner surface of the axial through hole 31 d. For the purpose of preventing scratches, for example, a curved surface is chamfered.

With reference to FIGS. 4-10, the case where the insertion part 6 of the endoscope 2 is inserted into, for example, the oil pan 40 using the guide tube 3 will be described.
In inspecting the vicinity of the convex portions 41 and 42 which are the portions of interest inside the oil pan 40 shown in FIG. 4, the operator performs the endoscope 2 (not shown), the core metal 20 and the tube constituting the guide tube 3. A body 30 is prepared. Then, the operator removes the bolt 43 from the oil pan 40 and starts extracting the oil from the oil pan 40.

  While the oil is being drained, the operator inserts the cored bar 20 having the plug portion 21 into the axial through hole 31d from the proximal end side opening 31c of the tube body 30, and as shown in FIG. A guide tube 3 integrated with the tube body 30 is configured.

  In the guide tube 3, the bent bar 31 a of the tube body 31 is deformed into a linear state by the rigidity of the core bar 20, while the core bar 20 is provided integrally with the tube body 30, while the distal end of the axial through hole 31 d. The side opening 31 b is closed by the plug portion 21 of the cored bar 20.

  Next, the operator inserts the guide tube 3 into the oil pan 40 through the screw hole 44 of the oil pan 40 as shown in FIG. Then, the distal end side of the guide tube 3 is pushed toward the facing inner surface 45 facing the screw hole 44. At this time, the distal end side opening 31b of the axial direction through hole 31d is closed by the plug portion 21, so that oil or the like is prevented from entering the tube body 30.

Since oil is highly viscous, it takes a considerable amount of time for the oil to be completely extracted from the oil pan 40. After confirming that the oil flow from the screw hole 44 is stopped, the operator introduces the guide tube 3 into the oil pan 40. However, an oil reservoir 47 exists in a part of the bottom 46 on the screw hole 44 side of the oil pan 40, and the guide tube 3 passes through the oil reservoir 47, which is a poor environment area, and moves toward the opposed inner surface 45. .
When the confirmation member 33 is close to the screw hole 44 as shown in FIG. 7, the tip of the guide tube 3 comes into contact with the opposing inner surface 45 close to the convex portions 41 and 42.

  The operator rotates the direction of the confirmation member 33 as shown by the arrows Y6a and Y6b in the drawing indicated by the broken lines until the tip of the guide tube 3 comes into contact with the opposing inner surface 45, and the core bar 20 is moved. When extracted, the tip side opening 31b is adjusted so as to face the desired convex portion 41 side or convex portion 42 side.

  After the contact, the operator removes the cored bar 20 from the axial through hole 31d of the tube body 30 as shown in FIG. Then, the bent flange 31a is formed again as shown by the two-dot chain line in the oil pan 40 by the elastic force of the tube main body 31, and the distal end side opening 31b is disposed on the convex portion 41, for example.

Next, the operator inserts the insertion portion 6 of the endoscope 2 into the axial through hole 31d through the proximal end side opening 31c of the tube body 30 from which the core bar 20 has been removed. At this time, the operator inserts the insertion portion 6 toward the distal end side opening 31b while confirming the inside of the axial through hole 31d with the endoscope 2 in an observation state.
Then, as shown in FIG. 9, the adapter 5, the distal end portion 6a, the bending portion 6b, and the flexible tube portion are projected in this order from the distal end side opening 31b, thereby completing the derivation of the insertion portion 6 to the site of interest. The insertion part 6 is led to the site of interest without passing through the oil reservoir 47 by being inserted through the tube body 30.

  Thereafter, the operator observes and inspects around the convex portion 41. And after completion | finish of a test | inspection, the core metal 20 is again inserted in the axial direction through-hole 31d of the tube body 30. FIG. Then, the bent collar 31a changes again in the straight state in the oil pan 40.

  Here, when the operator rotates the confirmation member 33 and removes the cored bar 20 again, the operator adjusts so that the front end side opening 31b faces the convex portion. After the adjustment, the cored bar 20 is removed from the axial through hole 31d of the tube body 30 again.

  Then, the bent collar portion 31 a is formed again in the oil pan 40 by the elastic force of the tube body 31, and the distal end side opening 31 b is disposed on the convex portion 42. The operator removes the core metal 20 again, and then inserts the insertion portion 6 of the endoscope 2 into the axial through hole 31d of the tube body 30. And if the insertion part 6 protrudes from the front end side opening 31b, the periphery of the convex part 42 will be test | inspected.

  After the inspection, the operator removes the insertion portion 6 of the endoscope 2 from the axial through hole 31d, and then inserts the cored bar 20 into the tube body 30. In this state, the tube body 30 is inserted into the oil pan 40. Remove from. Then, the bolt 43 is attached to the screw hole 44 to complete the inspection in the oil pan 40.

  Thus, the guide tube 3 includes the tube body 30 having the bent collar portion 31a and the axial through hole 31d, and the cored bar 20 having the stopper portion 21 and having rigidity for deforming the bent collar portion 31a into a linear state. Consists of. When performing an endoscopic inspection, the core metal 20 and the tube body 30 constitute an integral guide tube 3 that passes through a poor environment such as the oil reservoir 47 and is interested in the distal end portion of the guide tube 3. Place near the site. By this, by extracting the cored bar 20 from the axial direction through-hole 31d, the bent hook part 31a returns to the bent shape again, and the distal end part of the tube body 30 can be easily arranged at the site of interest.

  And after arrange | positioning the front-end | tip part of the tube body 30 to a site | part of interest, the insertion part 6 of the endoscope 2 is inserted in the axial direction through-hole 31d from which the metal core 20 was extracted, and is protruded from the front end side opening 31b. Thus, the oil 6 is guided to the site of interest by the insertion portion 6 of the endoscope 2 without oil adhering to the observation window and the illumination window, and the oil pan 40 can be observed well.

  In the present embodiment, the inside of the oil pan 40 is observed by the endoscope system 1. However, the endoscope system 1 according to the present embodiment is not limited to the observation in the oil pan, and passes through a poor environment such as an opaque liquid, a deposit, or dust due to dust or dirt. Applies to observation when necessary.

  In the present embodiment, the intrusion prevention member is a cored bar 20 having a stopper 21 and having a rigidity for deforming the bent collar 31a into a linear state. However, the configuration of the cored bar 20 is not limited to this, and may be the cored bar 20A shown in FIG.

  The cored bar 20A of FIG. 11 includes a wiping portion 23 for wiping off oil or the like adhering in the axial through hole 31d. The wiping portion 23 is, for example, a sponge, and is disposed in the vicinity of the proximal end side of the plug portion 21.

  According to this configuration, when the core metal 20 </ b> A is reinserted into the axial through hole 31 d of the tube body 30, if oil adheres to the axial through hole 31 d, the oil is wiped off by the wiping portion 23. Therefore, when the insertion portion 6 is reinserted into the axial through hole 31d, oil can be more reliably prevented from adhering to the observation window or the like.

FIG. 12 is a diagram illustrating another configuration example of the intrusion prevention member.
The intrusion prevention member of this embodiment is a tube member 20B. The tube member 20B is formed of a flexible fluororesin tube. A close contact portion 21B is provided at the distal end portion of the tube member 20B. The close contact portion 21B is composed of an inclined surface portion 21c formed so that the distal end side has a large diameter and the diameter dimension gradually changes toward the proximal direction, and an outer peripheral surface portion 21d having a constant diameter dimension. .

  According to this configuration, the tube member 20B is inserted into the axial through-hole 31d of the tube body 30 from the distal end side opening 31b side, and the tube member 20B and the tube body 30 constitute an integrated guide tube 3B. In the guide tube 3B, the inclined surface portion 21c is in close contact with the distal end inclined surface 31e of the axial through hole 31d of the tube body 30, and the outer peripheral surface portion 21d is in close contact with the distal end inner peripheral surface 31f, so that intrusion of oil or the like occurs. In a state where the tube member 20B is integrated with the tube body 30, the bent shape of the bent collar portion 31a can be maintained. For this reason, the guide tube 3 </ b> B passes through a poor environment region such as the oil reservoir 47 in a state where the bent collar portion 31 a is bent.

  And when passing through a poor environment and reaching a region of interest, the tube member 20B is removed. Thereafter, the insertion portion 6 of the endoscope 2 is inserted into the axial through hole 31d of the tube body 30 from which the tube member 20B has been removed, and the region of interest is observed.

  Further, the core metal 20, 20A or the tube member 20B of FIG. 13 is provided with a communication hole 24, respectively. The communication hole 24 communicates an opening 24a formed at the distal end portion and an opening 24b formed at the proximal end portion.

  For this reason, when the tip portions of the guide tubes 3 and 3B are located in a poor environment, oil or the like leaks to the outside where the operator is located through the communication hole 25. Accordingly, it can be determined that the distal ends of the guide tubes 3 and 3B are passing through a poor environment area.

  On the other hand, since there is no leakage of oil or the like outside, the operator can determine that the region of interest has been reached through the poor environment area.

  In addition, even if it is the structure provided with the communicating hole 24 in the metal core 20, 20A, or the tube member 20B, it is prevented that oil etc. penetrate | invade into the axial direction through-hole 31d of the tube body 30. FIG.

  In addition, by providing a valve (not shown) on the distal end side of the communication hole 24 so that a suction device (not shown) (for example, a syringe) can be attached to the proximal end side of the communication hole 24, the operator can appropriately perform suction. The guide tube can be introduced while confirming the environment in which the guide tubes 3 and 3B are inserted by operating the apparatus.

  The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the invention.

DESCRIPTION OF SYMBOLS 1 ... Endoscope system 2 ... Endoscope 3, 3B ... Guide tube 4 ... Apparatus main body 4a ... Exterior housing 5 ... Adapter 5a ... Tip part 6 ... Insertion part 6a ... Tip part 6b ... Curved part 6c ... Flexible tube Part 7: Operation part 7a ... Gripping part
7b: Bending operation lever 8 ... Universal cord 9 ... Monitor 10 ... Belt 11 ... Leg part 20, 20A ... Core metal 20B ... Tube member 21 ... Plug part 21B ... Close contact part 21a ... Plug part forming member 21c ... Inclined surface part 21d ... Outer circumference Surface part 22 ... Core metal gripping member 22a ... Axial through hole 22b ... Tip surface 23 ... Wiping part 24 ... Communication hole 24a, 24b ... Opening 25 ... Communication hole 30 ... Tube body 31 ... Tube body 31a ... Bent collar 31b ... Tip Side opening
31c: Base end side opening 31d: Axial through hole 31e ... Tip side inclined surface 31f ... Tip side inner peripheral surface 32 ... Tube gripping member 32a ... Axial through hole 32a ... Base end surface 33 ... Bending direction confirmation member 33a ... Concave portion 33b ... communication hole 40 ... oil pan 41, 42 ... convex part 43 ... bolt 44 ... screw hole 45 ... opposite inner surface 46 ... bottom part

Claims (6)

A tube body having elasticity that has an axial through-hole through which the insertion portion of the endoscope can be inserted, and can bend a bent collar portion at an arbitrary portion on the proximal side from the distal end surface;
An intrusion prevention member that prevents liquid, sediment, or suspended matter from entering the axial through hole in the state inserted into the axial through hole;
A guide tube for guiding an endoscope insertion portion. The intrusion prevention member can be freely inserted into and removed from the axial through-hole of the tube body, and is inserted into the axial through-hole so that the core bar has rigidity for deforming the bent collar portion into a linear state. And
The endoscope insertion portion guide guide tube according to claim 1, wherein the core bar has a plug portion that closes a distal end side opening of the axial through hole. The intrusion prevention member is a tube member that is deformed together with the bent collar portion in a state of being inserted into the axial through hole of the tube body,
2. The endoscope insertion portion guide for guiding according to claim 1, wherein the tube member is in close contact with at least a distal end side inner peripheral surface of the axial through hole in a state where the tube member is inserted into the axial through hole. tube.   The endoscope insertion portion guiding guide tube according to claim 2 or 3, wherein the intrusion prevention member is provided with a communication hole that communicates the distal end portion with the outside. An elastic tube body having an axial through-hole through which the insertion portion of the endoscope can be inserted and capable of providing a bent collar portion at an arbitrary portion on the proximal side from the distal end surface;
An intrusion prevention member that prevents liquid, sediment, or suspended matter from entering the axial through hole in the state inserted into the axial through hole;
In an endoscopy method using an endoscope insertion portion guiding guide tube comprising:
Inserting the intrusion prevention member into the through hole from the proximal end side opening of the axial through hole of the tube body,
The intrusion prevention member is integrated with the tube body in a predetermined state,
The tube body in which the intrusion prevention member is integrated is introduced in the vicinity of a region of interest by passing through a poor environment area with liquid, sediment, or suspended matter,
The intrusion prevention member is removed from the axial through hole of the tube body, and the insertion portion of the endoscope is inserted into the axial through hole of the tube body from which the intrusion prevention member has been removed. An endoscopy method for observing a region of interest by deriving a distal end portion of the insertion portion from a distal end side opening of a through hole. The intrusion prevention member can be freely inserted into and removed from the axial through-hole of the tube body, and is inserted into the axial through-hole so that the bent bar is rigidly deformed into a linear state. When
After observing the region of interest, reinserting the cored bar and integrating it with the tube body in a predetermined state and taking out the tube body from the region of interest or observing a region of interest different from the region of interest The endoscopy method according to claim 5.

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