JP3804069B1 - Balloon, endoscope equipped with the same, insertion aid, and endoscope apparatus - Google Patents

Abstract

A balloon capable of securing a large frictional resistance during inflation by partially coating the balloon surface and reducing the frictional resistance during contraction, an endoscope equipped with the balloon, an insertion aid, and An endoscope apparatus is provided.
A second balloon 80 to be mounted on an insertion assisting tool 70 is made of a rubber material, and a first outer surface portion, which is substantially half of the distal end side, is coated with a lubricious coating material 81, and the proximal end side thereof. A rubber material is exposed on the second outer surface portion, which is substantially half of the above.
[Selection] Figure 4

Description

  The present invention relates to a balloon for an endoscopic device, and more particularly, a balloon used for an endoscopic device for observing a deep digestive tract such as a small intestine or a large intestine, an endoscope equipped with the same, an insertion aid, and an endoscope. The present invention relates to a mirror device.

  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 force to be transmitted to the distal end of the insertion part due to the complicated bending of the intestinal tract. Have difficulty. For example, if excessive bending or bending occurs in the insertion portion, the insertion portion cannot be inserted further deeper. Therefore, a method has been proposed in which an insertion aid is put on the insertion portion of the endoscope and inserted into the body cavity, and the insertion portion is guided by this insertion aid to prevent excessive bending or bending of the insertion portion. Yes.

  For example, Patent Document 1 discloses an endoscope apparatus in which a first balloon is provided at a distal end portion of an insertion portion of an endoscope and a second balloon is provided at a distal end portion of an insertion assisting tool (also referred to as an overtube or a sliding tube). Is described. By inflating the first balloon and the second balloon, the insertion portion and the insertion aid can be fixed in the intestinal tract such as the small intestine. Accordingly, by alternately inserting the insertion portion and the insertion assisting tool while repeatedly expanding and contracting the first balloon and the second balloon, the insertion portion can be inserted into a deep portion of the intestinal tract that is bent in a complicated manner, such as the small intestine. .

By the way, the outer peripheral surface of the insertion portion of the endoscope and the insertion assisting tool is usually coated with a friction reducing coating to reduce friction when the insertion portion and the insertion assisting tool are inserted into and extracted from the body cavity. ing.
JP 2002-301019 A

  However, the conventional endoscope apparatus has a problem that when inserting and removing the insertion portion and the insertion assisting tool, the deflated balloon has a large frictional resistance and the operability of insertion and removal is poor. For this reason, there is a desire to reduce the frictional resistance of the balloon surface. However, if the frictional resistance of the balloon surface is reduced, the frictional force between the balloon and the body cavity wall surface becomes insufficient when the balloon is inflated, and the insertion part or insertion assist There was a problem that the device could not be fixed to the body cavity.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a balloon capable of ensuring a large frictional resistance during expansion and reducing the frictional resistance during contraction. It is another object of the present invention to provide an endoscope equipped with the balloon, an insertion aid, and an endoscope apparatus.

In order to achieve the above object, the invention according to claim 1 is mounted on an insertion portion of an endoscope or an insertion assisting tool that guides insertion through the insertion portion, and is configured to be inflatable and contractible. In the balloon, the surface of the balloon comprises a first outer surface portion that becomes an outer surface when inflated and deflated, and a second outer surface portion that is covered with the first outer surface portion when deflated and appears as an outer surface when inflated, together with the first outer surface portion frictional resistance is small rather than the second outer surface portion, said first outer surface portion is formed on the distal end side of the insertion portion or the insertion auxiliary member, the second outer surface portion is the It is formed in the base end side of an insertion part or the said insertion auxiliary tool, It is characterized by the above-mentioned. In order to achieve the above object, the invention according to claim 2 is mounted on an insertion portion of an endoscope or an insertion assisting tool that guides insertion through the insertion portion, and can be freely expanded and contracted. In the constructed balloon, the surface of the balloon includes a first outer surface portion that is an outer surface when inflated and deflated, and a second outer surface portion that is covered with the first outer surface portion when deflated and appears as an outer surface when inflated. The first outer surface portion is formed to have a smaller frictional resistance than the second outer surface portion, and the first outer surface portion is a part of the distal end side and the proximal end side of the insertion portion or the insertion assisting tool. The second outer surface portion is formed between the first outer surface portion on the distal end side and the first outer surface portion on the proximal end side.

According to the first or second aspect of the present invention, since the frictional resistance of the first outer surface portion which is the outer surface at the time of contraction and expansion is small, the frictional resistance when the balloon is contracted can be reduced. Therefore, the insertion / extraction operability of the insertion portion and the insertion assisting tool can be improved.

According to the invention of claim 1 or 2 , since the frictional resistance of the second outer surface portion which is covered at the time of contraction and becomes the outer surface at the time of expansion is increased, a large frictional force is generated between the balloon and the body cavity wall surface at the time of expansion. Can be secured.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the first outer surface portion is provided with a lubricious coating. Thereby, the frictional resistance of the first outer surface portion can be reduced.

According to the first aspect of the present invention, since the second outer surface portion having high frictional resistance is formed on the proximal end side, the second outer surface portion and the body cavity wall surface when the insertion portion or the insertion assisting tool is pulled toward the proximal end side. Are frictionally engaged, and a large frictional force is secured.

The invention according to claim 4 is an endoscope in which the balloon according to any one of claims 1 to 3 is attached to an insertion portion. The invention according to claim 5 is an insertion assisting tool equipped with the balloon according to any one of claims 1 to 3 . The invention according to claim 6 is an endoscope apparatus including the endoscope according to claim 4 and the insertion assisting tool according to claim 5 .

  According to the present invention, since the frictional resistance of the first outer surface portion is small, the frictional resistance when the balloon is deflated can be reduced, and the insertion / extraction operability of the insertion portion and the insertion assisting tool can be improved. Thus, since the frictional resistance of the second outer surface portion is large, a large frictional force can be secured between the balloon during inflation and the wall surface of the body cavity, and the body cavity can be reliably grasped by the balloon.

  Preferred embodiments of a balloon according to the present invention, an endoscope equipped with the balloon, an insertion aid, and an endoscope apparatus will be described in detail below with reference to the accompanying drawings.

  FIG. 1 is a system configuration diagram showing an embodiment of an endoscope apparatus according to the present invention. As shown in FIG. 1, the endoscope apparatus mainly includes an endoscope 10, an insertion assisting tool 70, and a balloon control device 100.

  The endoscope 10 includes a hand operation unit 14 and an insertion unit 12 that is connected to the hand operation unit 14 and is inserted into a body cavity. A universal cable 16 is connected to the hand operation unit 14, and an LG connector 18 is provided at the tip of the universal cable 16. The LG connector 18 is detachably connected to the light source device 20, thereby sending illumination light to an illumination optical system 54 (see FIG. 2) described later. In addition, an electrical connector 24 is connected to the LG connector 18 via a cable 22, and the electrical connector 24 is detachably coupled to the processor 26.

  The hand operation unit 14 is provided with an air / water supply button 28, a suction button 30, a shutter button 32, and a function switching button 34, and a pair of angle knobs 36 and 36. A balloon air supply port 38 is formed at the proximal end portion of the hand operation unit 14 by a tube bent in an L shape. By supplying or sucking fluid such as air to the balloon air supply port 38, the first balloon 60 described later can be inflated or deflated.

  The insertion portion 12 is composed of a flexible portion 40, a bending portion 42, and a distal end portion 44 in order from the hand operation portion 14 side. The bending portion 42 is remotely controlled by rotating the angle knobs 36, 36 of the hand operation portion 14. Bending operation. Thereby, the front-end | tip part 44 can be turned to a desired direction.

  As shown in FIG. 2, an observation optical system 52, illumination optical systems 54 and 54, an air / water supply nozzle 56, and a forceps port 58 are provided on the distal end surface 45 of the distal end portion 44. A CCD (not shown) is disposed behind the observation optical system 52, and a signal cable (not shown) is connected to a substrate that supports the CCD. The signal cable is inserted into the insertion portion 12, the hand operating portion 14, the universal cable 16, and the like of FIG. 1, extends to the electrical connector 24, and is connected to the processor 26. Therefore, the observation image captured by the observation optical system 48 is formed on the light receiving surface of the CCD and converted into an electric signal, and this electric signal is output to the processor 26 via the signal cable and converted into a video signal. Is done. Thereby, an observation image is displayed on the monitor 50 connected to the processor 26.

  An exit end of a light guide (not shown) is disposed behind the illumination optical systems 54 and 54 in FIG. The light guide is inserted through the insertion portion 12, the hand operating portion 14, and the universal cable 16 of FIG. 1, and an incident end is disposed in the LG connector 18. Therefore, by connecting the LG connector 18 to the light source device 20, the illumination light emitted from the light source device 20 is transmitted to the illumination optical systems 54 and 54 via the light guide, and irradiated forward from the illumination optical systems 54 and 54. Is done.

  The air / water supply nozzle 56 in FIG. 2 is connected to a valve (not shown) operated by the air / water supply button 28 in FIG. 1, and this valve is also connected to the air / water supply connector provided in the LG connector 18. 48 is communicated. An air / water supply means (not shown) is connected to the air / water connector 48 to supply air and water. Therefore, by operating the air / water supply button 28, air or water can be ejected from the air / water supply nozzle 56 toward the observation optical system 52.

  The forceps port 58 in FIG. 2 communicates with the forceps insertion portion 46 in FIG. Therefore, by inserting a treatment tool such as a forceps from the forceps insertion portion 46, the treatment tool can be led out from the forceps port 58. The forceps port 58 communicates with a valve (not shown) operated by the suction button 30, and this valve is further connected to the suction connector 49 of the LG connector 18. Therefore, by connecting a suction means (not shown) to the suction connector 49 and operating the valve with the suction button 30, a lesioned part or the like can be sucked from the forceps opening 58.

  A first balloon 60 made of an elastic material such as rubber is attached to the outer peripheral surface of the insertion portion 12. The first balloon 60 is formed in a substantially cylindrical shape with both ends narrowed. After the insertion portion 12 is inserted and the first balloon 60 is disposed at a desired position, the first balloon 60 is disposed as shown in FIG. The first balloon 60 is fixed to the insertion portion 12 by fitting rubber fixing rings 62 and 62 into both ends of the 60.

  A vent hole 64 is formed on the outer peripheral surface of the insertion portion 12 where the first balloon 60 is attached. The ventilation hole 64 communicates with a balloon air supply port 38 provided in the hand operation unit 14 of FIG. 1, and is connected to the balloon control device 100 via a tube 110 described later. Therefore, the first balloon 60 can be inflated and deflated by supplying and sucking air by the balloon control device 100. The first balloon 60 is inflated into a substantially spherical shape by supplying air, and sticks to the outer surface of the insertion portion 12 by sucking air.

  On the other hand, the insertion assisting tool 70 shown in FIG. 1 is composed of a cylindrical and rigid gripping portion 72 provided on the proximal end side, and a main body tube 73 attached to the distal end of the gripping portion 72. The insertion portion 12 of the endoscope 10 is inserted into the main body tube 73 from the grip portion 72.

  The main body tube 73 has a flexible resin tube made of urethane or the like as a base material, and an outer peripheral surface and an inner peripheral surface of the base material are coated with a hydrophilic coating material (lubricating coating material). As the hydrophilic coating material, for example, polyvinylpyrrolidone, acrylic resin, or silicon resin is used.

  A second balloon 80 is attached in the vicinity of the distal end of the main body tube 73. The second balloon 80 is formed in a substantially cylindrical shape with both ends narrowed, and is attached in a state where the insertion assisting tool 70 is penetrated, and is fixed by winding a thread (not shown). A tube 74 attached to the outer peripheral surface of the insertion assisting tool 70 is communicated with the second balloon 80, and a connector 76 is provided at the proximal end portion of the tube 74. A tube 120 is connected to the connector 76, and is connected to the balloon control device 100 via the tube 120. Therefore, the second balloon 80 can be inflated and deflated by supplying and sucking air with the balloon control device 100. The second balloon 80 is expanded into a substantially spherical shape by supplying air, and is attached to the outer peripheral surface of the insertion assisting tool 70 by sucking air.

  An injection port 78 is provided on the proximal end side of the insertion assisting tool 70. The injection port 78 communicates with an opening (not shown) formed on the inner peripheral surface of the insertion assisting tool 70. Therefore, the lubricant can be supplied into the insertion aid 70 by injecting the lubricant (for example, water) from the injection port 78 with a syringe or the like. Therefore, when the insertion portion 12 is inserted into the insertion assisting tool 70, the friction between the inner peripheral surface of the insertion assisting tool 70 and the outer peripheral surface of the insertion portion 12 can be reduced, and the relative relationship between the insertion portion 12 and the insertion assisting tool 70 can be reduced. Movement can be performed smoothly.

  The balloon control device 100 of FIG. 1 is a device that supplies and sucks fluid such as air to the first balloon 60 and supplies and sucks fluid such as air to the second balloon 80. The balloon control device 100 mainly includes a device main body 102 and a hand switch 104 for remote control.

  On the front surface of the apparatus main body 102, a power switch SW1, a stop switch SW2, a first pressure display unit 106, a second pressure display unit 108, a first function stop switch SW3, and a second function stop switch SW4 are provided. The first pressure display unit 106 and the second pressure display unit 108 are panels for displaying the pressure values of the first balloon 60 and the second balloon 80, respectively. When an abnormality such as balloon breakage occurs, the pressure display units 106 and 108 are displayed. An error code is displayed.

  The first function stop switch SW3 and the second function stop switch SW4 are switches for turning on / off the functions of an endoscope control system A and an insertion assisting tool control system B, which will be described later. When only one of the two balloons 80 is used, the function stop switches SW3 and SW4 which are not used are operated to turn off the function. In the control system A or B in which the function is turned off, air supply and suction are completely stopped, and the pressure display unit 106 or 108 of the system is also turned off. The function stop switches SW3 and SW4 can be set to an initial state by turning off both of them. For example, the calibration with respect to the atmospheric pressure is performed by turning off both function stop switches SW3 and SW4 and simultaneously pressing all the switches SW5 to SW9 of the hand switch 104.

  A tube 110 that supplies and sucks air to the first balloon 60 and a tube 120 that supplies and sucks air to the second balloon 80 are connected to the front surface of the apparatus main body 102. The connection portions between the tubes 110 and 120 and the apparatus main body 102 are provided with backflow prevention units 112 and 122 for preventing backflow of body fluid when the first balloon 60 or the second balloon 80 is torn. The backflow prevention units 112 and 122 are configured by incorporating a gas-liquid separation filter in a hollow disk-like case (not shown) that is detachably attached to the apparatus main body 102. The filter prevents the liquid from flowing in.

  In addition, the pressure display units 106 and 108, the function stop switches SW3 and SW4, and the backflow prevention units 112 and 122 are always arranged in a constant manner for the endoscope 10 and the insertion assisting tool 70. That is, the pressure display unit 106 for the endoscope 10, the function stop switch SW3, and the backflow prevention unit 112 are respectively connected to the pressure display unit 108, the function stop switch SW4, and the backflow prevention unit 122 for the insertion assisting tool 70. Are arranged on the right side.

  On the other hand, the hand switch 104 includes a stop switch SW5 similar to the stop switch SW2 on the apparatus main body 102 side, an ON / OFF switch SW6 for instructing the pressurization / decompression of the first balloon 60, and the pressure of the first balloon 60. A pause switch SW7 for holding, an ON / OFF switch SW8 for instructing pressurization / depressurization of the second balloon 80, and a pause switch SW9 for holding the pressure of the second balloon 80 are provided. The hand switch 104 is electrically connected to the apparatus main body 102 via the cord 130. Although not shown in FIG. 1, the hand switch 104 is provided with a display unit that indicates an air supply state or an exhaust state of the first balloon 60 or the second balloon 80.

  The balloon control device 100 configured as described above supplies air to the balloons 60 and 80 to inflate them and controls the air pressure to a constant value to hold the balloons 60 and 80 in an inflated state. In addition, air is sucked from each balloon 60 and 80 and contracted, and the air pressure is controlled to a constant value to hold each balloon 60 and 80 in a contracted state.

  The balloon control device 100 is connected to the balloon dedicated monitor 82 and displays the pressure value and the inflated / deflated state of the balloons 60 and 80 on the balloon dedicated monitor 82 when the balloons 60 and 80 are inflated and deflated. . The pressure values and the inflated / deflated states of the balloons 60 and 80 may be superimposed on the observation image of the endoscope 10 and displayed on the monitor 50.

  Next, an operation method of the endoscope apparatus configured as described above will be described with reference to FIGS. 3 (a) to 3 (j).

  First, the insertion part 12 is inserted into the intestinal tract (large intestine) 90 from the anus 90A as shown in FIG. 3A with the insertion assisting tool 70 inserted through the insertion part 12 (insertion operation). At this time, the first balloon 60 and the second balloon 80 are deflated. Moreover, the lock of the wire 71 of the insertion assisting tool 70 is released, and the main body tube 73 is allowed to be freely bent.

  Next, as shown in FIG. 3A, the first balloon 60 is inflated with the distal end of the insertion portion 12 reaching the sigmoid colon 90B, and the distal end of the insertion portion 12 is fixed to the intestinal tract 90 (fixing operation).

  Next, the insertion assisting tool 70 is pushed in to be inserted along the insertion portion 12 (pushing operation). Then, as shown in FIG. 3B, after the distal end portion of the insertion assisting tool 70 is brought to the vicinity of the first balloon 60, air is supplied to the second balloon 80 to be inflated. As a result, the second balloon is fixed to the intestinal tract 90, and the intestinal tract 90 is held by the insertion assisting tool 70 via the second balloon 80.

  Next, as shown in FIG. 3 (c), the insertion assisting tool 70 is pulled together to eliminate excessive bending and bending of the intestinal tract 90 (hand feeding operation).

  Next, air is sucked from the first balloon 60 and the first balloon 60 is deflated. Then, as shown in FIG. 3D, the insertion portion 12 is inserted into the deep portion of the intestinal tract 90 (for example, up to the bent portion at the upper end of the descending colon 90C) (insertion operation). Then, as described above, after performing a fixing operation for inflating the first balloon 60 and a pushing operation for pushing the insertion assisting tool 70 along the insertion portion 12, the second balloon 80 is inflated to perform a gripping operation and inserted. A hand drag operation by the assisting tool 70 is performed. Thereby, as shown in FIG.3 (e), the excess bending | flexion and bending of the intestinal tract 90 are removed.

  By repeatedly performing such a series of operations (insertion operation, fixing operation, push-in operation, gripping operation, and hand-feeding operation), the distal end of the insertion portion 12 can be gradually inserted into the deep portion of the intestinal tract 90. Further, the insertion assisting tool 70 can remove excessive bending of the intestinal tract 90.

  For example, FIG. 3 (f) shows a state in which the distal end of the insertion portion 12 is inserted to the end of the transverse colon 90D, and the insertion assisting tool 70 is operated to remove excess bending of the intestinal tract 90. FIG. 3G shows a state in which the distal end of the insertion portion 12 is further inserted and inserted up to the ileum 90E of the small intestine, and excessive bending of the intestinal tract 90 is removed. FIG. 3 (h) shows a state in which the distal end of the insertion portion 12 is inserted into a deeper portion of the small intestine, and an excessive deflection of the intestinal tract 90 is removed.

  When such an operation is repeated and the distal end of the insertion portion 12 is inserted into the deep part of the small intestine, the insertion assisting tool 70 forms a loop shape as shown in FIG. Therefore, by inserting the insertion portion 12 as shown in FIG. 3 (j), the insertion portion can be inserted deeper into the intestinal tract 90.

  By the way, the first balloon 60 and the second balloon 80 of the present embodiment are made of a rubber material such as natural rubber, and a part of the surface of the material is coated with a lubricant coat, and the remaining part is The rubber material is exposed. Although the following description will be made with an example of the second balloon 80, the first balloon 60 is preferably configured in the same manner.

  4A is a side cross-sectional view schematically showing a state in which the second balloon 80 is inflated, and FIG. 4B is a side view schematically showing a state in which the second balloon 80 is deflated.

  As shown in these drawings, the second balloon 80 appears such that a substantially half surface on the distal end side becomes an outer surface during expansion and contraction, and a substantially half surface on the proximal end side is folded and hidden during contraction. It has become. Hereinafter, a portion that always becomes an outer surface during expansion and contraction is referred to as a first outer surface portion, and a portion that is an outer surface during expansion but is hidden by the first outer surface portion during contraction is referred to as a second outer surface portion. The second balloon 80 is brazed so that it is always folded at the same position when deflated.

  As shown in FIG. 4A, the first outer surface portion which becomes the distal end side when the second balloon 80 is inflated is coated with a lubricating coating material 81. Further, the second outer surface portion that becomes the base end side during expansion does not have the lubricity coating material 81 and the rubber material is exposed, and the frictional resistance is larger than that of the first outer surface portion. The lubricious coating material 81 is preferably the same as the coating material that coats the outer peripheral surface of the main body tube 73, and for example, polyvinylpyrrolidone, acrylic resin, silicon resin, or the like is used.

  When the second balloon 80 configured as described above is deflated as shown in FIG. 4B, the second outer surface portion with a high frictional resistance is hidden behind the first outer surface portion with a low frictional resistance, Only the lubricity coating material 81 on the outer surface appears on the outer surface. Therefore, the second balloon 80 at the time of contraction has a significantly reduced frictional resistance with the body cavity wall surface. On the other hand, since the lubricating coating material is coated on the outer peripheral surface of the main body tube 73 of the insertion assisting tool 70 as described above, the frictional resistance of the entire surface of the insertion assisting tool 70 is reduced. Therefore, the insertion / extraction operation of the insertion assisting tool 70 can be easily performed. Specifically, in the operation method described above, when the insertion assisting tool 70 is pushed in, the frictional resistance between the insertion assisting tool 70 and the body cavity wall surface is small, so that the insertion assisting tool 70 can be inserted smoothly.

  Further, as shown in FIG. 4A, when the second balloon 80 is inflated, a second outer surface portion having a high frictional resistance appears. Therefore, the second outer surface portion makes a frictional resistance with the body cavity wall surface. be able to. In particular, in the operation method described above, since the insertion assisting tool 70 is pulled toward the proximal end side with the second balloon 80 inflated, the second outer surface portion on the proximal end side of the second balloon 80 is frictionally engaged with the intestinal tract 90. Match. Therefore, the second balloon 80 can secure a sufficient frictional force against the intestinal tract 90 by the second outer surface portion having a large frictional resistance.

  As described above, according to the present embodiment, the first outer surface portion of the second balloon 80 is coated with the lubricious coating material 81 so that the friction resistance is smaller than that of the second outer surface portion. In addition, it is possible to improve the insertion / removability of the insertion assisting tool 70 by reducing the frictional resistance during contraction.

  In the second balloon 80 of the above-described embodiment, the first outer surface portion is formed in the distal end half and the second outer surface portion is formed in the proximal end half, but the first outer surface portion and the second outer surface portion The arrangement is not limited to this. For example, the arrangement may be as shown in FIGS. 5 (a) and 5 (b). That is, the lubricating coating material 81 is coated with a part on the distal end side and a part on the proximal end side of the inflated second balloon 80 as the first outer surface portion, and the rubber material is exposed with the central portion as the second outer surface portion. . Thereby, the frictional resistance of the center part where the expanded second balloon 80 contacts the intestinal tract 90 can be further increased. 5A and 5B, the first outer surface portion on the proximal end side is formed to be smaller than the first outer surface portion on the distal end side, and the second outer surface portion at the center is formed. It is preferable to form a little from the base end. Accordingly, when the insertion assisting tool 70 is operated by hand, the entire second outer surface portion at the center is frictionally engaged with the intestinal tract 90, and a large frictional force can be ensured.

  6A and 6B are cross-sectional views showing a second balloon 80 having a different configuration in which the arrangement of the first outer surface portion and the second outer surface portion is different. A cross section orthogonal to the axis is schematically shown. As shown in FIG. 6A, the second balloon 80 is formed by alternately forming the first outer surface portion coated with the lubricity coating material 81 and the second outer surface portion exposed from the rubber material in the circumferential direction. Yes. As shown in FIG. 6B, when the second balloon 80 is deflated, the second outer surface portion is folded and hidden under the first outer surface portion.

  Even when the first outer surface portion and the second outer surface portion are formed as described above, when the second balloon 80 is deflated, only the first outer surface portion to which the lubricity coating material 81 is applied appears on the table. The frictional resistance can be reduced. Further, when the second balloon 80 is inflated, not only the first outer surface portion but also the second outer surface portion having a high frictional resistance appears and comes into contact with the intestinal tract 90 and the like, so that a large frictional force is ensured. be able to.

  In the above-described embodiment, the first outer surface portion is coated with the lubricity coating material 81 to reduce its friction resistance to the second outer surface portion, but the first outer surface portion has a second friction resistance. The method is not particularly limited as long as it is smaller than the frictional resistance of the outer surface portion. For example, a material having good lubricity may be used as a balloon material, and a coating that increases frictional resistance may be applied to the second outer surface portion.

  The manufacturing method of the second balloon 80 described above is not particularly limited. For example, the insertion assisting tool 70 is immersed in the coating material liquid in a state in which the second balloon 80 is contracted, and is pulled up. Can be manufactured.

System configuration diagram of an endoscope apparatus according to the present invention The perspective view which shows the front-end | tip part of the insertion part of an endoscope Explanatory drawing which shows the operating method of the endoscope apparatus which concerns on this invention Sectional drawing which shows the structure of the 2nd balloon to which this invention is applied typically Sectional drawing which shows typically the 2nd balloon of a different structure from FIG. Sectional drawing which shows typically the 2nd balloon of a different structure from FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Endoscope, 12 ... Insertion part, 14 ... Hand operation part, 20 ... Light source device, 26 ... Processor, 50 ... Monitor, 60 ... 1st balloon, 70 ... Insertion aid, 80 ... 2nd balloon, 81 ... Coat material

Claims (6)

In an insertion portion of an endoscope, or a balloon configured to be inflatable and contractible while being attached to an insertion assisting tool that guides insertion through the insertion portion,
The surface of the balloon includes a first outer surface portion that is an outer surface when inflated and deflated, and a second outer surface portion that is covered with the first outer surface portion when contracted and appears as an outer surface when inflated. Is formed with a smaller frictional resistance than the second outer surface part,
Said first outer surface portion is formed on the distal end side of the insertion portion or the insertion auxiliary member, the second outer surface portion to a feature to be formed on the base end side of the insertion portion or the insertion aid is Luba Rune. In an insertion part of an endoscope, or a balloon configured to be inflatable and contractible while being attached to an insertion assisting tool that guides insertion through the insertion part,
The surface of the balloon includes a first outer surface portion that becomes an outer surface when inflated and deflated, and a second outer surface portion that is covered with the first outer surface portion when deflated and appears as an outer surface when inflated. Is formed with a smaller frictional resistance than the second outer surface part,
The first outer surface part is formed on a part of the distal end side and a part of the proximal end side of the insertion part or the insertion assisting tool,
  The balloon is characterized in that the second outer surface portion is formed at a central portion between the first outer surface portion on the distal end side and the first outer surface portion on the proximal end side. The balloon according to claim 1 or 2 , wherein the first outer surface portion is provided with a lubricious coating. An endoscope comprising the balloon according to any one of claims 1 to 3 attached to an insertion portion. An insertion assisting tool equipped with the balloon according to any one of claims 1 to 3 . An endoscope apparatus comprising the endoscope according to claim 4 and the insertion assisting tool according to claim 5 .

Images