JP2005237947A - Auxiliary tool for inserting endoscope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an auxiliary tool for inserting an endoscope which allows a lubricant to be supplied uniformly to the entire inner peripheral surface of the auxiliary tool without increasing the diameter of the auxiliary tool. <P>SOLUTION: The lubricant is supplied from a lubricant supply portion 72 to a tube body 51 of an over tube 50. The lubricant is injected from an injection port 66, flows to a lubricant supply path 68, and supplied to the inside of the tube body 51 through a lubricant supply path 78 and a plurality of openings 75, 75... formed on the tube body 51. The lubricant can be supplied to the entire inside of the tube body 51. Because a plurality of the openings 75, 75... are formed at predetermined intervals from the base end portion to the tip portion of the tube body 51, the lubricant is supplied to the entire region of the inner peripheral surface of the tube body 51. Further, the openings 75, 75... are formed in such a way that their opening areas increase from the base end portion to the tip portion, so that a lubricant supply can be uniformed in the entire region of the inner peripheral surface of the tube body 51. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an insertion aid for an endoscope, and more particularly to an insertion aid for an endoscope used when an insertion portion of an endoscope is inserted 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. There was a problem that it was difficult and it took a long time to perform the treatment. Therefore, an insertion aid called an overtube is attached to the insertion portion of the endoscope and inserted into a body cavity, and the insertion portion is guided by this overtube, thereby causing excessive bending or bending of the insertion portion. An endoscope apparatus for preventing this has been proposed (for example, Patent Document 1).

In addition, the conventional overtube has an inlet for lubricating liquid formed at the base end of the tube. By injecting the lubricating liquid from the inlet into the base end of the overtube, an endoscope can be inserted into the overtube. Some have been proposed that improve the slidability of the part to shorten the treatment time. As the lubricating liquid, water, physiological saline or the like is used.
JP-A-10-248794

  However, in the conventional overtube in which the injection port of the lubricating liquid is formed at the base end portion, the lubricating liquid injected from the injection port does not sufficiently spread over the entire inner peripheral surface of the overtube, and the endoscope insertion portion There was a problem that the slidability could not be further improved.

  The problem is that if the diameter of the overtube is increased and the gap between the overtube and the endoscope insertion section is increased, the lubricant supplied to the base end side is spread over the entire inner peripheral surface of the overtube. It can be solved because it can be struck. However, since the overtube is also inserted into the body cavity, the diameter is preferably as small as possible. Therefore, there is a conflicting problem that if the diameter of the overtube is made small, the lubricating liquid cannot be supplied to the entire inner peripheral surface of the overtube, and if the diameter of the overtube is made large, it is not suitable as a member for insertion into a body cavity. It was happening.

  The present invention has been made in view of such circumstances, and insertion assistance for an endoscope that can uniformly supply a lubricating liquid to the entire inner peripheral surface of the insertion aid without increasing the diameter of the insertion aid. The purpose is to provide ingredients.

  In order to achieve the above object, the endoscope insertion portion is inserted from the proximal end portion thereof, and the lubricating liquid is supplied from the lubricating liquid inlet formed in the proximal end portion. In the insertion assisting device for an endoscope to be injected, the lubricating fluid supplied to the injection port is supplied to the gap between the inner peripheral surface of the insertion assisting tool and the outer peripheral surface of the endoscope insertion portion. A lubricating liquid supply passage is formed.

  According to the first aspect of the present invention, the portion where the lubrication is particularly desired to be improved between the endoscope insertion portion and the insertion assisting tool is that the insertion portion of the endoscope is the inner peripheral corner of the distal end opening of the insertion assisting tool. It is made paying attention to it being the front-end | tip part of the insertion auxiliary tool rubbed. According to a first aspect of the present invention, a lubricating liquid supply path for supplying the lubricating liquid supplied to the injection port to the gap between the inner peripheral surface of the insertion assisting tool and the outer peripheral surface of the endoscope insertion portion is formed in the insertion assisting tool. Thus, the lubricating liquid can be directly supplied to the distal end portion of the insertion assisting tool. Thereby, this invention can improve the lubricity of the part which wants to improve lubricity mentioned above especially.

  The invention according to claim 2 is characterized in that a plurality of openings for supplying the lubricating liquid injected into the lubricating liquid supply passage to the inside of the insertion auxiliary tool are formed in the insertion auxiliary tool at a predetermined interval. The invention according to claim 3 is characterized in that the plurality of openings are formed such that the opening area increases from the proximal end portion to the distal end portion of the insertion assisting tool.

  According to the second aspect of the present invention, the lubricating liquid injected from the injection port flows into the lubricating liquid supply path, and then is supplied to the inside of the insertion assisting tool through the plurality of openings formed in the insertion assisting tool. Is done. A plurality of openings are formed at a predetermined interval from the base end portion to the tip end portion of the insertion assisting tool, so that the lubricating liquid is supplied to the entire inner peripheral surface of the insertion assisting tool, and the opening is further defined in claim 3. As described above, since the opening area is formed so as to increase from the proximal end portion to the distal end portion of the insertion assisting tool, the supply amount of the lubricating liquid becomes uniform over the entire inner peripheral surface of the insertion assisting tool. Therefore, according to the present invention, the lubricating liquid can be uniformly supplied to the entire inner peripheral surface of the insertion aid without increasing the diameter of the insertion aid. Thereby, since a favorable slipperiness is always obtained, the slidability of the insertion part with respect to the insertion assisting tool is improved, and the treatment time can be shortened. Also, by always obtaining good slipperiness, the inner and outer diameters of the insertion assisting tool can be reduced, and the inner diameter of the insertion assisting tool can be brought closer to the diameter of the endoscope insertion portion. Can provide.

  According to a fourth aspect of the present invention, a plurality of the lubricating liquid supply paths are provided. By providing a plurality of lubricating liquid supply paths in the insertion assisting tool, a plurality of openings can be formed on the circumference of the insertion assisting tool, so that the supply amount of the lubricating liquid is further increased over the entire inner peripheral surface of the insertion assisting tool. It becomes uniform.

  According to a fifth aspect of the present invention, the lubricating liquid supply path is provided spirally on the outer peripheral surface of the insertion assisting tool. Thereby, a plurality of openings can be formed on the circumference of the insertion assisting tool by one lubricating liquid supply path. Therefore, the lubricating liquid can be supplied uniformly over the entire inner peripheral surface of the insertion assisting tool as compared with a single straight rod-shaped lubricating liquid supply path.

  According to the insertion assisting tool of the endoscope according to the present invention, the lubricating liquid supply path extends from the proximal end portion to the distal end of the insertion assisting tool on the outer peripheral surface of the insertion assisting tool. A plurality of openings are formed at predetermined intervals, and the openings are formed so that the opening area increases from the proximal end portion to the distal end portion of the insertion assisting tool, without increasing the diameter of the insertion assisting tool. Lubricating liquid can be uniformly supplied to the entire inner peripheral surface of the insertion aid.

  A preferred embodiment of an endoscope insertion aid according to the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 is a system configuration diagram of an endoscope apparatus to which an insertion assisting tool according to the present invention is applied. 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 tip 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 balloon 30.

  The insertion portion 12 includes a flexible portion 32, a bending portion 34, and a distal end hard 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, the distal end surface 37 of the distal end portion 36 is provided with an objective optical system 38, an illumination lens 40, an air / water feeding nozzle 42, a forceps port 44, and the like at predetermined positions. Further, an air supply / suction port 28 is opened on the outer peripheral surface of the distal end portion 36, and this air supply / suction port 28 is provided with an air supply tube (not shown) having an inner diameter of about 0.8 mm inserted through the insertion portion 12. 1 and communicates with the balloon air inlet 26 of FIG. Therefore, air is blown from the air supply / suction port 28 of the tip 36 by supplying air to the balloon supply port 26, and conversely, by sucking air from the balloon supply port 26, the air is sucked from the air supply / suction port 28. Air is aspirated.

  As shown in FIG. 1, 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 is formed of a central bulging portion 30c and attachment portions 30a and 30b at both ends thereof, and the air supply / suction port 28 is positioned inside the bulging portion 30c. It is attached to the tip 36 side. The attachment portions 30a and 30b are formed to have a diameter smaller than the diameter of the tip portion 36, and after being in close contact with the tip portion 36 with its elastic force, a thread (not shown) is wound and fixed. In addition, it is not limited to winding fixing of a thread | yarn, You may fix the attaching parts 30a and 30b to the front-end | tip part 36 by fitting a fixing ring or a rubber band in the attaching parts 30a and 30b.

  In the first balloon 30 attached to the distal end portion 36, the bulging portion 30c is inflated into a substantially spherical shape by the air supplied from the air supply / suction port 28 shown in FIG. On the contrary, when air is sucked from the air supply suction port 28, the bulging portion 30 c is contracted 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 a molded product of a flexible urethane resin, and the outer peripheral surface thereof is coated with a lubricant coat, and the inner peripheral surface is also coated with a lubricant coat. The proximal end opening 51A of the tube main body 51 is fitted with a connection port 52A formed at the distal end of the rigid gripping portion 52 in a watertight state, and the gripping portion 52 is detachably connected to the tube main body 51. Yes. The insertion portion 12 is inserted from the proximal end opening 52B of the grip portion 52 toward the tube main body 51.

  As shown in FIG. 1, 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. This tube 56 is bonded to the outer peripheral surface of the tube body 51 and extends to the tip of the tube body 51 as shown in FIG. ing.

  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 where the tube main body 51 penetrates, and includes a central bulging portion 60c and attachment portions 60a and 60b at both ends thereof. The distal end side attachment portion 60a is folded inside the bulging portion 60c, and the folded attachment portion 60a is fixed to the tube main body 51 by winding the X-ray contrast yarn 62. The proximal-side attachment portion 60 b is disposed outside the second balloon 60, and is fixed to the tube body 51 by winding a thread 64.

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. Therefore, 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 30c 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.

  By the way, the overtube 50 is provided with a lubricating liquid inlet 66, which is connected to a lubricating liquid supply path 68. The lubricating liquid supply path 68 extends from the proximal end portion to the distal end portion of the tube main body 51 along the axial direction of the tube main body 51 as shown in FIGS. 4, openings 75, 75... For supplying the lubricating liquid injected into the lubricating liquid supply path 68 to the inside of the tube main body 51 are formed at predetermined intervals in the lubricating liquid supply path 68 and the tube main body 51. A plurality are formed. Further, these openings 75, 75... Are formed so that the opening areas sequentially increase from the proximal end portion of the tube main body 51 toward the distal end portion. The formation interval and opening area of the openings 75 are set based on the supply amount of the lubricating liquid supplied from the lubricating liquid supply unit 72 such as the syringe of FIG. That is, the interval and opening area at which the lubricating liquid is uniformly supplied to the entire inner peripheral surface of the tube main body 51 are set based on the supply amount. In addition, the supply pipe amount of the lubricating liquid may be set based on the interval between the openings 75 and the opening area.

  FIGS. 5A and 5B show an example of a method for manufacturing the lubricating liquid supply path 68. FIG. 5 is an enlarged view showing the vicinity of the lubricating liquid supply path 68 by cutting the tube body 51 in a direction orthogonal to the axial direction. In the manufacturing method shown in FIG. 5, a tube member 74 having a U-shaped cross section is formed integrally with a tube main body 51 as shown in FIG. 5A, and an opening 75 is formed in this by post-processing. Thereafter, a urethane-based heat-shrink sheet or heat-shrinkable tube 76 is placed over the collar member 74 or the entire tube body 51, and this is heat-shrinked. As a result, as shown in FIG. 5B, a lubricating liquid supply path 68 formed by the flange member 74 and the heat shrinkable sheet or heat shrinkable tube 76 is formed. Further, the lubricating liquid supply path 68 may be integrally formed so as to be embedded in the tube main body 51.

  A plurality (three in FIG. 6) of such lubricating liquid supply paths 68 may be formed on the outer peripheral surface of the tube main body 51 as shown in FIG. Further, without forming the flange member 74 integrally with the tube body 51, a separate flange member 74 is bonded to the tube body 51 to form an opening 75, and a heat shrinkable sheet or heat shrinkable tube 76 is formed on this as shown in FIG. The lubricating liquid supply path 68 may be manufactured by heat shrinking. Further, as shown in FIG. 7A, a flange member 74 is formed or adhered to the tube main body 51 in a spiral shape, and a heat-shrinkable sheet or heat-shrinkable tube 76 is heat-shrinked as shown in FIG. The liquid supply path 68 may be manufactured. The opening 75 in FIG. 7 is also formed so that the opening area sequentially increases from the proximal end portion to the distal end portion of the tube main body 51.

  On the other hand, the balloon control device 100 of FIG. 1 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 a constant value to control the first balloon 30 and the second balloon 60. Is held in an expanded state. In addition, air is sucked from the first balloon 30 and the second balloon 60 and contracted, and the air pressure is controlled to a constant value to hold the first balloon 30 and the second balloon 60 in a contracted state.

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

  First, as shown in FIG. 8A, 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. 8B, 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. 8C, only the insertion portion 12 of the endoscope 10 is inserted into the deep portion of the intestinal tract 70. Then, as shown in FIG. 8D, 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, air is sucked from the second balloon 60 to contract the second balloon 60, and then 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.8 (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.8 (g), the overtube 50 is pulled 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.

  Next, as shown in FIG. 8 (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 intestinal tract 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. 8D, a pushing operation as shown in FIG. ), A hand dragging operation as shown in FIG. 8G, 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.

  During the treatment by such an endoscope apparatus, the lubricating liquid is supplied to the tube main body 51 of the overtube 50 from the lubricating liquid supply unit 72 of FIG. The lubricating liquid is injected from the injection port 66 and flows into the lubricating liquid supply path 68, and then the tube main body 51 through the lubricating liquid supply path 78 and a plurality of openings 75, 75 formed in the tube main body 51. Supplied inside.

  Since a plurality of openings 75, 75... Are formed from the proximal end portion to the distal end portion of the tube main body 51 at a predetermined interval, the lubricating liquid is supplied to the entire inner peripheral surface of the tube main body 51. Further, since the openings 75, 75... Are formed so that the opening area increases from the proximal end portion to the distal end portion of the tube main body 51, the supply amount of the lubricating liquid is the entire inner peripheral surface of the tube main body 51. Becomes uniform.

  Therefore, according to the overtube 50 of the embodiment, the lubricating liquid can be uniformly supplied to the entire inner peripheral surface of the tube body 51 without increasing the diameter of the tube body 51. Thereby, since favorable slipperiness is always acquired, the slidability of the insertion part 12 with respect to the tube main body 51 improves, and it can shorten treatment time. In addition, by always obtaining good slipperiness, the inner and outer diameters of the tube main body 51 inserted into the body cavity can be reduced, and the inner diameter of the tube main body 51 can be made closer to the diameter of the endoscope insertion portion 12. Therefore, the small diameter overtube 50 can be provided.

  Further, as shown in FIG. 6, by providing a plurality of lubricating liquid supply paths 68 in the tube main body 51, a plurality of openings 75, 75... Can be formed on the circumference of the tube main body 51. Is more uniform over the entire inner peripheral surface of the tube body 51.

  Further, as shown in FIG. 7, by providing the lubricating liquid supply path 68 in the tube body 51 in a spiral shape, a plurality of openings 75, 75... On the circumference of the tube main body 51 by one lubricating liquid supply path 68. Can be formed. Therefore, the lubricating liquid can be supplied uniformly over the entire inner peripheral surface of the tube body 51 as compared with the single straight rod-shaped lubricating liquid supply path 68.

  In the embodiment, the example of the overtube 50 having a balloon has been described. However, the present invention can also be applied to a sliding tube that has no balloon and guides the endoscope insertion portion into the body cavity.

  FIG. 9 is a cross-sectional view showing an embodiment of the overtube 50 in which the opening 75 is formed only in the vicinity of the tip 58 of the tube main body 51 of the overtube 50, and the same reference numerals as those of the overtube 50 shown in FIG. Are denoted by the same reference numerals, and the description thereof is omitted.

  On the outer peripheral surface of the tube main body 51 in FIG. 9, a lubricating liquid supply path 68 that communicates with the injection port 66 extends from the proximal end portion of the tube main body 51 to the distal end 58, and a distal end portion 69 of the lubricating liquid supply path 68 is formed. In the vicinity of the distal end 58 of the tube main body 51 positioned, an opening 75 for supplying the lubricating liquid injected into the lubricating liquid supply path 68 to the inside of the tube main body 51 is formed.

  A portion where the lubricity is particularly desired to be enhanced between the endoscope insertion portion 12 and the tube main body 51 is that the insertion portion 12 is rubbed against the inner peripheral corner portion 59 </ b> A of the distal end opening 59 of the tube main body 51. It is. Like the overtube 50 in FIG. 9, the lubricating liquid injected into the lubricating liquid supply path 68 is placed inside the tube main body 51 in the vicinity of the distal end 58 of the tube main body 51 where the distal end portion 69 of the lubricating liquid supply path 68 is located. By forming the opening 75 that supplies the gap between the inner peripheral surface of the insertion assisting tool and the outer peripheral surface of the endoscope insertion portion, the lubricating liquid can be supplied directly to the distal end 58 of the tube main body 51. Thereby, according to the overtube 50 of FIG. 9, the lubricity of the front-end | tip 58 of the overtube 50 which wants to improve lubricity especially can be improved.

System configuration diagram of an endoscope apparatus to which an overtube according to the present invention is applied 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 hard part of the insertion part equipped with the 1st balloon. Side sectional view showing the tip of the overtube through which the insertion section is inserted An enlarged cross-sectional view of the main part of the lubricating liquid supply passage formed in the tube body Sectional view of the tube body with multiple lubrication fluid supply paths formed in the tube body Explanatory drawing which shows the example in which the spiral lubricating liquid supply path was formed in the tube main body Explanatory drawing which shows the operation method of the endoscope apparatus shown in FIG. Cross-sectional view of the overtube that supplies lubricant to the tip of the overtube

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, 60 ... second balloon, 66 ... injection port, 68 ... lubricating liquid supply path, 74 ... saddle member, 75 ... opening, 76 ... heat shrink sheet or heat shrink tube, 100 ... balloon control device, 102 ... Main body, 104 ... Hand switch

Claims (5)

In the endoscope insertion assisting tool in which the endoscope insertion portion is inserted from the base end portion thereof, and the lubricating liquid is injected from the lubricating liquid injection port formed in the base end portion,
The insertion assisting tool is provided with a lubricant supply path for supplying the lubricant supplied to the inlet to the gap between the inner peripheral surface of the insertion assisting tool and the outer peripheral surface of the endoscope insertion portion. Endoscope insertion aid as a feature.   2. The inner portion according to claim 1, wherein a plurality of openings are formed in the insertion assisting tool at predetermined intervals to supply the lubricating liquid injected into the lubricating liquid supply path to the inside of the insertion assisting tool. Endoscope insertion aid.   The insertion assisting tool for an endoscope according to claim 2, wherein the plurality of openings are formed so that an opening area increases from a proximal end portion to a distal end portion of the insertion assisting tool.   The endoscope insertion aid according to claim 3, wherein a plurality of the lubricating liquid supply paths are provided.   The endoscope insertion assisting tool according to claim 3, wherein the lubricating liquid supply path is spirally provided on an outer peripheral surface of the insertion assisting tool.

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