JP3874293B2 - Endoscope device - Google Patents

Description

  The present invention relates to an endoscope apparatus, and more particularly to an endoscope apparatus having an endoscope in which a balloon is attached to the distal end of an insertion portion and an insertion assisting tool for guiding the insertion portion of the endoscope into a body cavity.

  When inserting the insertion part of the endoscope into the deep digestive tract such as the small intestine, simply pushing the insertion part makes it difficult for the force to be transmitted to the distal end of the insertion part due to the complicated bending of the intestinal tract. Have difficulty. Therefore, an insertion aid called an overtube or a sliding tube is attached to the insertion portion of the endoscope and inserted into the body cavity, and the insertion portion is guided by this insertion aid, so that the extra portion of the insertion portion is inserted. An endoscope apparatus that prevents bending and bending has been proposed (for example, Patent Document 1).

  As a conventional endoscope apparatus, there is known a double balloon type endoscope apparatus in which a first balloon is provided at a distal end portion of an endoscope insertion portion and a second balloon is provided at a distal end portion of an insertion assisting tool. (For example, Patent Document 2 and Patent Document 3).

In the double balloon type endoscope apparatus, the insertion portion and the insertion assisting tool are inserted into the intestinal tract for a predetermined length, the first and second balloons are inflated and the first and second balloons are fixed to the intestinal wall, There is a case where an operation of contracting the bent intestine straightly is performed by pulling the insertion portion and the insertion aid simultaneously. Thereafter, by repeatedly performing the insertion operation of the insertion portion and the insertion aid and the hand feeding operation, the intestinal tract is drawn and the insertion portion is inserted into the target site.
JP-A-10-248794 JP 2001-340462 A JP 2002-301019 A

  By the way, the endoscope apparatus provided with the balloon is operated as shown by an arrow A in a state where the balloon 2 attached to the distal end of the endoscope insertion portion 1 is in close contact with the intestinal wall 3 as shown in FIG. However, the state of the intestinal wall 3 may be observed. This observation is performed by an observation optical system (not shown) attached to the distal end surface of the insertion portion 1, but in a conventional endoscope apparatus, the reaction force of the hand-drawing operation is transmitted to the balloon 2, and this force causes the balloon As shown in FIG. 8, there is a disadvantage that the bulging portion 2A of 2 may bend in the direction of the distal end surface of the insertion portion 1 and obstruct the visual field of the observation optical system.

  The balloon 2 includes a central bulging portion 2A, a front fitting portion 2B formed in front of the bulging portion 2A, and a rear fitting portion 2C formed behind the bulging portion 2A. The fitting part 2 </ b> B and the rear fitting part 2 </ b> C are fitted on the outer peripheral surface of the distal end of the insertion part 1, and the thread 4 is wound around and fixed to the outer peripheral part of the distal end of the insertion part 1.

  The present invention has been made in view of such circumstances, and an endoscope apparatus capable of preventing the obstruction of the visual field of the observation optical system and the obstruction of the insertion property of the double balloon endoscope due to the balloon being blown. The purpose is to provide.

In order to achieve the above object, the invention according to claim 1 is an endoscope apparatus including an inflatable balloon that is attached to a distal end outer peripheral portion of an endoscope insertion portion, wherein the balloon is a bulging portion. A front fitting portion formed in front of the bulging portion and fitted on the outer periphery of the distal end of the endoscope insertion portion, and formed in the rear of the bulging portion and fitted in the endoscope insertion portion. A rear fitting portion to be worn , and at the outer periphery of the distal end of the endoscope insertion portion, two grooves for winding a thread through the front fitting portion of the balloon are formed, The thread is wound around the two grooves through the front fitting portion of the balloon, so that the front outer peripheral portion of the front fitting portion, and the boundary portion between the front fitting portion and the bulging portion, The yarn is wound around two places .

  When attaching a balloon to the outer periphery of the distal end of the insertion portion, the following points need to be considered. In other words, in order to ensure airtightness and fixing strength, the lengths of the front fitting portion and the rear fitting portion of the balloon fitted to the outer peripheral portion of the distal end are not short and need a certain length. In addition, since the air supply suction port for supplying air to the balloon is formed at the distal end instead of the curved portion of the insertion portion, when the front fitting portion of the balloon is fitted away from the tip of the distal portion, Since the length of the tip must be unnecessarily increased by that much, the front fitting part must be fitted at the very end of the tip. Due to these two factors, when a part of the front fitting portion is swollen together with the bulging portion in addition to the bulging portion, the drowned portion obstructs the visual field of the observation optical system. I stopped.

  In order to prevent this, the front fitting portion is attached to the outer periphery of the distal end of the endoscope insertion portion with an attachment member that does not swell over the entire front fitting portion. That is, since the amount of deflection of the front fitting portion is reduced, it is possible to prevent obstruction of the visual field of the observation optical system due to balloon ballooning.

According to a second aspect of the present invention, in order to achieve the above object, a first balloon that can be inflated and retracted attached to the outer periphery of the distal end of the endoscope insertion portion and a second balloon that can be inflated and contracted to the outer periphery of the distal end In the endoscope apparatus provided with an insertion aid that is attached and the endoscope insertion portion is inserted and serves as a guide when inserting the endoscope insertion portion, the first balloon includes a bulging portion, A front fitting part that is formed in front of the bulging part and fitted to the outer periphery of the distal end of the endoscope insertion part, and is formed in the rear of the bulging part and fitted to the endoscope insertion part. A rear fitting part, and a two-end groove around which a thread is wound through the front fitting part of the first balloon is formed on the outer periphery of the distal end of the endoscope insertion part, The outer periphery of the front end of the front fitting portion is wound around the two grooves through the front fitting portion of the first balloon. The thread is wound around two places, a front fitting portion and a boundary portion between the bulging portion, and the second balloon is formed in front of the bulging portion and the bulging portion, and the insertion aid A front fitting portion that is fitted to the outer peripheral portion of the distal end of the tool, and a rear fitting portion that is formed behind the bulging portion and is fitted to the insertion assisting tool. The part fitting part is fixed by a thread wound around two points of a front end outer peripheral part of the front part fitting part and a boundary part between the front part fitting part and the bulging part. To do.

  The invention according to claim 2 is an endoscope in which a first balloon is attached to a distal end outer peripheral portion of an insertion portion, and an insertion assisting tool for guiding the insertion portion of the endoscope, the second balloon attached It is intended for an endoscope apparatus including an insertion aid. Also in this endoscope apparatus, the front fitting portion of the first balloon is attached to the outer peripheral portion of the distal end of the endoscope insertion portion by an attachment member that does not swell over the entire front fitting portion. Obstruction of the visual field of the observation optical system due to the rising of the first balloon can be prevented. In addition, when the second balloon is blown, the portion may be crimped to the endoscope insertion portion, and the smoothness of the insertion / extraction operation of the endoscope insertion portion may be hindered. Therefore, obstruction of the insertion / extraction of the endoscope insertion portion can be prevented.

According to the present invention, the attachment member is a thread, and the thread is provided at two locations, a front-end outer peripheral part of the front part fitting part and a boundary part between the front part fitting part and the bulging part. It is characterized by being wound. The front outer periphery of the front insertion portion when the front end of the insertion portion is inserted into the insertion aid by fixing the front outer periphery of the front insertion portion of the first balloon to the front end of the insertion portion with a thread. Can prevent drowning. Therefore, the insertion portion can be smoothly inserted into the insertion aid. Moreover, since the boundary part of the front part fitting part and the said bulging part is fixed with the thread | yarn, the whole front part fitting part can be prevented from rolling up. Therefore, it is possible to reliably prevent obstruction of the field of view of the observation optical system due to the front fitting portion rolling up.

Further, according to the present invention, since the position of the two grooves serves as an index of the balloon attachment position with respect to the distal end of the endoscope insertion portion, the balloon attachment position can be easily specified.

  According to the endoscope apparatus according to the present invention, the front fitting portion of the balloon is attached to the outer peripheral portion of the endoscope insertion portion and / or the distal end of the insertion assisting tool by the attachment member so that the whole is not rolled up. Therefore, obstruction of the visual field of the observation optical system due to balloon ballooning and obstruction of the insertability of the double balloon endoscope can be prevented.

  Hereinafter, preferred embodiments of an endoscope apparatus according to the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a system configuration diagram of an endoscope apparatus according to the present invention. The endoscope apparatus shown in FIG. 1 includes an endoscope 10, an overtube (insertion aid) 50, and a balloon control device 100.

  The endoscope 10 includes a hand operation unit 14 and an insertion unit 12 connected to the hand operation unit 14. A universal cable 15 is connected to the hand operation unit 14, and a connector (not shown) connected to a processor or a light source device (not shown) is provided at the end of the universal cable 15.

  The hand operation unit 14 is provided with an air / water supply button 16, a suction button 18, and a shutter button 20 that are operated by an operator, and a pair of angle knobs 22, 22 and a forceps insertion unit 24 are respectively provided. It is provided in the position. Further, the hand operation unit 14 is provided with a balloon air supply port 26 for supplying air to the first balloon 30 and sucking air from the first balloon 30.

  The insertion portion 12 includes a flexible portion 32, a bending portion 34, and a distal end portion 36. The bending portion 34 is configured by connecting a plurality of node rings so as to be able to bend, and is remotely operated by a turning operation of a pair of angle knobs 22, 22 provided on the hand operation portion 14. Thereby, the front end surface 37 of the front end portion 36 can be directed in a desired direction.

  As shown in FIG. 2, an observation optical system 38, illumination lenses 40 and 40, an air / water supply nozzle 42, a forceps port 44, and the like are provided at predetermined positions on the distal end surface 37 of the distal end portion 36. 2 and 3, an air supply / suction port 28 is provided on the outer peripheral surface of the distal end portion 36. The air supply / suction port 28 has an inner diameter of 0. 0 mm inserted into the insertion portion 12 as shown in FIG. It communicates with the balloon air inlet 26 of FIG. 1 through an air supply tube (not shown) of about 8 mm. Accordingly, air is blown from the air supply / suction port 28 of the tip 36 by supplying air to the balloon supply port 26, while air is sucked from the air supply / suction port 28 by sucking air from the balloon supply port 26. Air is aspirated.

  A first balloon 30 made of an elastic material such as rubber is detachably attached to the distal end portion 36 of the insertion portion 12. As shown in FIG. 3, the first balloon 30 includes a central bulging portion 30A, a front fitting portion 30B formed in front of the bulging portion 30A, and a rear fitting portion formed behind the bulging portion 30A. 30C. The first balloon 30 is attached to the distal end portion 36 so that the air supply / suction port 28 is positioned inside the bulging portion 30A. The front fitting portion 30B and the rear fitting portion 30C are formed with a diameter smaller than the diameter of the tip portion 36, and after being fitted to the tip portion 36 with its elastic force, the front fitting portion 30B has 2 Threads (attachment members) 160 and 162 are wound at a predetermined interval, and one thread 164 is wound around a part of the rear fitting portion 30C and fixed thereto. The yarns 160 and 162 will be described later.

  The first balloon 30 attached to the distal end portion 36 is inflated into a substantially spherical shape by blowing air from the air supply / suction port 28 shown in FIG. On the other hand, by sucking air from the air supply suction port 28, the bulging portion 30 </ b> A contracts and is brought into close contact with the outer peripheral surface of the tip portion 36.

  The overtube 50 shown in FIG. 1 is formed of a tube main body 51 and a grip portion 52. The tube body 51 is formed in a cylindrical shape as shown in FIG. 4 and has an inner diameter slightly larger than the outer diameter of the insertion portion 12. The tube body 51 is configured by covering the outside of a flexible resin tube made of urethane or the like with a lubrication coat and covering the inside with a lubrication coat. The insertion portion 12 is inserted toward the tube body 51 from the proximal end opening 52A of the grip portion 52 of FIG.

  A balloon air supply port 54 is provided on the proximal end side of the tube main body 51. An air supply tube 56 having an inner diameter of about 1 mm is connected to the balloon air supply port 54, and the tube 56 is bonded to the outer peripheral surface of the tube main body 51 and extends to the distal end portion of the tube main body 51.

  As shown in FIG. 4, the distal end 58 of the tube body 51 is formed in a tapered shape. A second balloon 60 made of an elastic body such as rubber is attached to the proximal end side of the distal end 58 of the tube main body 51. The second balloon 60 is mounted in a state in which the tube main body 51 passes therethrough, and includes a central bulging portion 60c, a front fitting portion 60a in front thereof, and a rear fitting portion 60b in the rear thereof. ing. Two X-ray contrast yarns (attachment members) 62 and 62 are wound around the front fitting portion 60a at a predetermined interval and fixed to the tube body 51. The rear fitting part 60 b is fixed to the tube body 51 by winding a thread 64 around a part thereof.

  The bulging portion 60c is formed in a substantially spherical shape in a natural state (a state in which neither is inflated nor contracted), and its size is larger than a size in a natural state (a state in which neither is expanded nor contracted) of the first balloon 30. Largely formed. Accordingly, when air is supplied to the first balloon 30 and the second balloon 60 at the same pressure, the outer diameter of the bulging portion 60c of the second balloon is larger than the outer diameter of the bulging portion 30A of the first balloon 30. . For example, when the outer diameter of the first balloon 30 is φ25 mm, the outer diameter of the second balloon 60 is configured to be φ50 mm.

  The above-described tube 56 is opened inside the bulging portion 60c, and an air supply / suction port 57 is formed. Therefore, when air is supplied from the balloon air supply port 54, air is blown out from the air supply / suction port 57, and the bulging portion 60c is expanded. When air is sucked from the balloon air supply port 54, air is sucked from the air supply suction port 57, and the second balloon 60 is deflated. 1 is an injection port for injecting a lubricating liquid such as water into the tube main body 51.

  On the other hand, the balloon control device 100 is a device that supplies and sucks fluid such as air to the first balloon 30 and supplies and sucks fluid such as air to the second balloon 60. The balloon control device 100 includes a device main body 102 having a pump, a sequencer, and the like (not shown) and a hand switch 104 for remote control.

  On the front panel of the apparatus main body 102, a power switch SW1, a stop switch SW2, a pressure gauge 106 for the first balloon 30 and a pressure gauge 108 for the second balloon 60 are provided. Further, a tube 110 that supplies and sucks air to the first balloon 30 and a tube 120 that supplies and sucks air to the second balloon 60 are attached to the front panel of the apparatus main body 102. Reservoir tanks 130 and 140 for collecting body fluids flowing back from the first balloon 30 and the second balloon 60 when the first balloon 30 and the second balloon 60 are broken are respectively provided in the middle of the tubes 110 and 120. Provided.

  On the other hand, the hand switch 104 holds the same stop switch SW3 as the stop switch SW2 on the apparatus main body 102 side, the ON / OFF switch SW4 that supports pressurization / decompression of the first balloon 30, and the pressure of the first balloon 30. There is provided a pause switch SW5 for holding, an ON / OFF switch SW6 for supporting pressurization / depressurization of the second balloon 60, and a pause switch SW7 for holding the pressure of the second balloon 60. The hand switch 104 is electrically connected to the apparatus main body 102 via a cable 150.

  The balloon control device 100 configured as described above supplies air to the first balloon 30 and the second balloon 60 to inflate them, and controls the air pressure to inflate the first balloon 30 and the second balloon 60. Keep in state. In addition, air is sucked and contracted from the first balloon 30 and the second balloon 60, and the air pressure is controlled to hold the first balloon 30 and the second balloon 60 in a contracted state.

  Incidentally, as shown in FIG. 3, the front fitting portion 30 </ b> B of the first balloon 30 is fixed to the distal end portion 36 by winding two threads 160 and 162. The obstruction of the field of view of the observation optical system due to the conventional balloon 2 shown in FIG. 8 being swollen is due to the large amount of the balloon 2 being swollen. The cause was that a part of the front fitting portion 2B was also rolled up together with the bulging portion 2A. In order to prevent this, in the endoscope apparatus according to the embodiment, as shown in FIG. 3, the front fitting portion 30 </ b> B is separated into two at a predetermined distance in the axial direction of the endoscope insertion portion 12. The yarns 160 and 162 are fixed. Thereby, the amount of deflection of the front fitting portion 30B is reduced, and obstruction of the visual field of the observation optical system 38 due to the first balloon 30 being raised can be prevented.

  Further, the threads 160 and 162 for fixing the front fitting portion 30B are wound around the tip outer peripheral portion of the front fitting portion 30B and the boundary portion between the front fitting portion 30B and the bulging portion 30A. Yes. Thereby, since the whole front fitting part 30B can be prevented from being twisted, obstruction of the visual field of the observation optical system 38 due to the rising of the first balloon 30 can be reliably prevented. In addition, the thread 160 is wound around the position of the outer periphery of the front end of the front fitting portion 30B, and the outer periphery of the front end is fixed to the insertion portion 12. It is possible to prevent the portion from rubbing against the inner peripheral surface of the overtube 50. Thereby, the insertion property of the insertion part 12 with respect to the overtube 50 improves.

  Further, as shown in FIG. 5, two grooves 166 and 168 for winding the threads 160 and 162 are formed on the outer peripheral portion of the distal end portion 36 of the endoscope insertion portion 12. Accordingly, the positions of the two grooves 166 and 168 serve as an index of the balloon attachment position with respect to the distal end portion 36, so that the attachment position of the first balloon 30 can be easily specified.

  Next, an operation method of the endoscope apparatus will be described with reference to FIGS.

  First, as shown in FIG. 6A, the insertion portion 12 is inserted into the intestinal tract (for example, the descending leg of the duodenum) 70 with the overtube 50 placed on the insertion portion 12. At this time, the first balloon 30 and the second balloon 60 are deflated.

  Next, as shown in FIG. 6B, the second balloon 60 is inflated by supplying air to the second balloon 60 in a state where the distal end 58 of the overtube 50 is inserted to the bent portion of the intestinal tract 70. As a result, the second balloon 60 is locked to the intestinal tract 70, and the tip 58 of the overtube 50 is fixed to the intestinal tract 70.

  Next, as shown in FIG. 6C, only the insertion part 12 of the endoscope 10 is inserted into the deep part of the intestinal tract 70. Then, as shown in FIG. 6D, air is supplied to the first balloon 30 to be inflated. Thereby, the first balloon 30 is fixed to the intestinal tract 70. At that time, since the first balloon 30 is smaller than the second balloon 60 when inflated, the burden on the intestinal tract 70 is small, and damage to the intestinal tract 70 can be prevented.

  Next, after the air is sucked from the second balloon 60 and the second balloon 60 is contracted, the overtube 50 is pushed in and inserted along the insertion portion 12 as shown in FIG. And after pushing the front-end | tip 58 of the overtube 50 to the 1st balloon 30 vicinity, as shown in FIG.6 (f), air is supplied to the 2nd balloon 60, and it is made to expand. Thereby, the second balloon 60 is fixed to the intestinal tract 70. That is, the intestinal tract 70 is grasped by the second balloon 60.

  Next, as shown in FIG.6 (g), the overtube 50 is drawn around. As a result, the intestinal tract 70 contracts substantially straight, and the excess bending or bending of the overtube 50 is eliminated. It should be noted that when the overtube 50 is pulled together, both the first balloon 30 and the second balloon 60 are locked to the intestinal tract 70, but the frictional resistance of the first balloon 30 is higher than the frictional resistance of the second balloon 60. small. Therefore, even if the first balloon 30 and the second balloon 60 move relative to each other, the first balloon 30 having a small frictional resistance slides with respect to the intestinal tract 70, so that the intestinal tract 70 is connected to both the balloons 30, 60. Will not be damaged by being pulled by.

  At this time, since the front fitting part 30B of the first balloon 30 is fixed to the distal end part 36 by winding two threads 160 and 162, the hand feeding operation indicated by the arrow A in FIG. The amount of blurring of the first balloon 30 that occurs sometimes decreases, and no blurring portion appears in the field of view of the observation optical system 38. Therefore, obstruction of the visual field of the observation optical system 38 due to the first balloon 30 being blown can be prevented.

  Further, the thread 160 for fixing the front fitting portion 30B is wound around the outer periphery of the front end of the front fitting portion 30B and the boundary portion between the front fitting portion 30B and the bulging portion 30A. Since the entire fitting portion 30B is prevented from being twisted, obstruction of the visual field of the observation optical system 38 due to the first balloon 30 being twisted can be reliably prevented.

  Next, as shown in FIG. 6 (h), air is sucked from the first balloon 30 to contract the first balloon 30. And the front-end | tip part 36 of the insertion part 12 is inserted in the deep part of the intestine 70 as much as possible. That is, the insertion operation shown in FIG. Thereby, the front-end | tip part 36 of the insertion part 12 can be inserted in the deep part of the intestinal tract 70. FIG. When inserting the insertion portion 12 into a deeper portion, after performing a fixing operation as shown in FIG. 6D, a pushing operation as shown in FIG. ), A hand dragging operation as shown in FIG. 6G, and an insertion operation as shown in FIG. Thereby, the insertion part 12 can be further inserted into the deep part of the intestinal tract 70.

  On the other hand, the second balloon 60 of the overtube 50 according to the embodiment, like the first balloon 30, has a front fitting portion 60a fixed by two threads 62 and 62. The balloon 60 is prevented from being twisted. When the second balloon 60 is drooped forward as shown in FIG. 9, the curled portion may be crimped to the insertion portion 12, and the smoothness of the insertion / extraction operation of the insertion portion 12 may be impaired. Such a defect appears when the distal end portion 36 of the insertion portion 12 is inserted into the deep portion of the intestinal tract 70 as shown in FIG.

  Therefore, in the second balloon 60 of the overtube 50 according to the embodiment, the front fitting portion 60a is fixed by the two threads 62 and 62, similarly to the front fitting portion 30B of the first balloon 30. Therefore, no drooling occurs as shown in FIG. Thereby, the insertion / extraction property of an endoscope insertion part can be improved.

  In the embodiment, the overtube 50 is illustrated as an insertion aid, but the present invention is not limited to this, and a sliding tube inserted transanally can also be used.

System configuration diagram of an endoscope apparatus according to an embodiment The perspective view which shows the front-end | tip part of the insertion part of an endoscope The perspective view which shows the front-end | tip part of the insertion part with which the 1st balloon was mounted | worn. Side sectional view of the tip of the overtube The principal part enlarged view of the insertion part front-end | tip which showed the groove | channel where the thread | yarn for fixing a 1st balloon is wound Explanatory drawing which shows the operating method of the endoscope apparatus which concerns on embodiment Explanatory drawing which showed the state in which the balloon is drowning in the endoscope apparatus of embodiment Explanatory drawing which showed the state where the balloon is drowning in the conventional endoscope apparatus Explanatory drawing when the front fitting part of the second balloon is fixed with one thread Explanatory drawing of this invention at the time of fixing the front part fitting part of a 2nd balloon with two thread | yarns

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Endoscope, 12 ... Insertion part, 14 ... Hand operation part, 26 ... Balloon air supply port, 28 ... Air supply suction port, 30 ... 1st balloon, 36 ... Tip part, 50 ... Over tube, 51 ... Tube Main body, 52 ... gripping part, 54 ... balloon air supply port, 56 ... air supply tube, 60 ... second balloon, 62, 64 ... thread, 100 ... balloon control device, 102 ... device main body, 104 ... hand switch, 110, 120 ... tube, 160, 162, 164 ... thread, 166, 168 ... groove

Claims (2)

In an endoscope apparatus including an inflatable balloon that is attached to an outer peripheral portion of a distal end of an endoscope insertion portion,
The balloon is formed at a bulging portion, a front fitting portion formed in front of the bulging portion and fitted on a distal end outer peripheral portion of the endoscope insertion portion, and formed behind the bulging portion. It is composed of a rear fitting part that is fitted to the endoscope insertion part,
On the outer periphery of the distal end of the endoscope insertion portion, two grooves are formed in which a thread is wound through the front fitting portion of the balloon.
The thread is wound around the two grooves through the front fitting portion of the balloon, so that the front outer peripheral portion of the front fitting portion, and the boundary between the front fitting portion and the bulging portion An endoscope apparatus characterized in that the thread is wound around two places . A first balloon that can be expanded and contracted attached to the outer periphery of the distal end of the endoscope insertion portion, and a second balloon that can be expanded and contracted to the outer periphery of the distal end, and the endoscope insertion portion is inserted into the endoscope. In an endoscope apparatus provided with an insertion assisting tool that serves as a guide when inserting the insertion part,
The first balloon includes a bulging portion, a front fitting portion that is formed in front of the bulging portion and is fitted to a distal end outer peripheral portion of the endoscope insertion portion, and a rear portion of the bulging portion. And a rear fitting portion that is fitted to the endoscope insertion portion,
In the outer peripheral portion of the distal end of the endoscope insertion portion, two grooves are formed in which a thread is wound through a front fitting portion of the first balloon.
A thread is wound around the two grooves through the front fitting portion of the first balloon, so that the front outer peripheral portion of the front fitting portion, the front fitting portion, and the bulging portion The yarn is wound at two places with the boundary,
The second balloon includes a bulging portion, a front fitting portion that is formed in front of the bulging portion and is fitted to a distal end outer peripheral portion of the insertion assisting tool, and is formed at the rear of the bulging portion. It is composed of a rear fitting part that is fitted to the insertion aid,
The front fitting portion of the second balloon is fixed by a thread wound around two points of the outer peripheral portion of the front fitting portion and the boundary between the front fitting portion and the bulging portion. An endoscope apparatus characterized by being provided .

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