JP2004329720A - Balloon type endoscope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a balloon type endoscope capable of preventing a backflow of a humor into an air supplying and suction device in the case of bursting of a balloon. <P>SOLUTION: According to the air flow path structure of a fluid storing tank 130, the balloon type endoscope is constructed such that when a pump 101 is driven and air is sucked through a tube 160, a check valve 164 is opened and a check valve 166 is closed, and air is sucked to a pump 101 from a tube 110 through the fluid storing tank 130 and the tube 160. In this case, the backflow of the humor into the pump 101 can be prevented, since the humor sucked from the tube 110 is stored in the fluid storing tank 130, even though the balloon is broken. On the other hand, when air is supplied from the pump 101 to the tube 160, the check valve 164 is closed and the check valve 166 is opened, thereby the air from the pump 101 is supplied to the balloon 20 side from the tube 160, via a bypass tube 162 and the tube 110. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a balloon-type endoscope, and more particularly to an endoscope provided with an expandable and contractible balloon at the end of an endoscope insertion portion.
[0002]
[Prior art]
As an alternative to the conventional small intestine endoscope, a double balloon type endoscope is known. This double balloon type endoscope has an endoscope in which a balloon is provided at the distal end of the endoscope, air can be supplied to the balloon and air can be suctioned, and an overtube into which an insertion portion of the endoscope is inserted. In addition, a balloon is provided at the distal end of the tube, and an overtube capable of supplying and sucking air to the balloon is provided (for example, Patent Document 1).
[0003]
A balloon control device is connected to each balloon of the double balloon type endoscope, and the balloon control device inflates and contracts each balloon by separately supplying air and suctioning air to each balloon.
[0004]
When inserting a double balloon type endoscope into the small intestine, after inflating the balloon of the endoscope and fixing it to the intestinal tract, the balloon of the overtube is deflated, and the overtube is extended along the endoscope insertion section. Proceed to the balloon. The balloon of the overtube is inflated again to fix the overtube to the intestinal tract, and thereafter, the balloon of the endoscope is contracted to insert the endoscope insertion portion deep. The above operation is repeated while moving the fixed point by the balloon from deep to deep. When the endoscope insertion section forms a complicated loop, the overtube is slowly pulled together with the endoscope with both balloons inflated. By this operation, the loop is simplified without the endoscope tip coming off, and the inserted intestinal tract is shortened so as to be folded on the overtube. By repeating the above series of operations, the intestinal tract is folded on the overtube, and the insertion into the deep small intestine is advanced while simplifying the loop of the intestinal tract.
[0005]
[Patent Document 1]
JP-A-51-11689 (FIG. 1 on page 2)
[0006]
[Problems to be solved by the invention]
As described above, since the balloon of the endoscope and the balloon of the overtube are inflated and used as a fulcrum, they may be broken due to abnormal pressure. If the balloon is torn, the air inside the balloon may be sucked to the body fluid when the balloon is deflated and the balloon may be deflated, and the body fluid may flow back to the suction pump and adversely affect the fixed throttle and the solenoid valve.
[0007]
The present invention has been made in view of such circumstances, and an object of the present invention is to provide a balloon-type endoscope that can prevent a body fluid from flowing back to an air supply suction device when a balloon is broken. I do.
[0008]
[Means for Solving the Problems]
According to the first aspect of the present invention, in order to achieve the above object, a balloon is provided at the distal end of the endoscope insertion section, and an air supply / suction device is connected to the balloon via an air flow path. A balloon-type endoscope for expanding and contracting a balloon by supplying and sucking air by a suction device, wherein a liquid storage tank is connected to a middle portion of the air flow path. I will provide a.
[0009]
According to a second aspect of the present invention, in order to achieve the above object, a first balloon is provided at the distal end of the endoscope insertion portion, and the first balloon is provided with air supply and suction via an air flow path. A balloon-type endoscope to which a device is connected and which expands and contracts the first balloon by supplying and sucking air by the air supply and suction device, and an overtube into which the endoscope insertion portion is inserted, A second balloon is provided at the tip of the overtube, and an air supply / suction device is connected to the second balloon via an air flow path, and the second air supply / suction device supplies and sucks air. And an overtube for inflating and deflating the balloon, and a liquid reservoir is provided in a middle part of the air flow path of the balloon type endoscope and a middle part of the air flow path of the overtube. Use tank provide double balloon type endoscope, wherein each is connected.
[0010]
According to the first and second aspects of the present invention, when a bodily fluid is sucked from the balloon due to a rupture of the balloon on the endoscope side and / or the overtube side, the bodily fluid flows to a middle portion of the air flow path. Since the liquid is stored in the connected liquid storage tank, it is possible to prevent the body fluid from flowing back to the air supply suction device.
[0011]
According to the third aspect of the present invention, when air is sucked from the air supply / suction device through the first air flow path, the first check valve provided in the first air flow path opens, Since the second check valve provided in the third air flow path closes, air is sucked from the second air flow path through the liquid reservoir tank and the first air flow path. At this time, if the balloon has been torn, the suctioned bodily fluid is stored in the liquid storage tank.
[0012]
On the other hand, when air is supplied from the air supply / suction device to the first air flow path, the first check valve provided in the first air flow path is closed, and the second check valve provided in the third air flow path is closed. Since the stop valve opens, air is supplied from the first air flow path to the balloon via the third air flow path and the second air flow path. At this time, even if the bodily fluid is stored in the reservoir tank, the air bypasses the reservoir tank and flows into the second air flow path, so that the reservoir tank is not pressurized by air. Thereby, it is possible to prevent the bodily fluid stored in the liquid storage tank from flowing back toward the endoscope and / or the overtube.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of a balloon type endoscope according to the present invention will be described in detail with reference to the accompanying drawings.
[0014]
FIG. 1 is a system configuration diagram of an endoscope apparatus including a balloon-type endoscope and a balloon control device according to the present invention.
[0015]
The endoscope apparatus shown in FIG. 1 includes a double balloon type endoscope including a balloon type endoscope 10 and an overtube 50, and a balloon control device 100.
[0016]
The balloon type endoscope 10 is an electronic endoscope provided with an objective optical system 76 (see FIG. 3), an image pickup device (CCD) and the like at the tip of the insertion section 12, and an observation image is transmitted through the objective optical system 76. To form an image on a CCD, where it is photoelectrically converted. The electrical signal indicating the photoelectrically converted observation image is output to a processor (not shown) via wiring in the insertion unit 12 and the hand operation unit 14, where the signal is appropriately processed and then output to the monitor TV. Thereby, an observation image is displayed on the monitor TV.
[0017]
An air supply suction port 16 is formed on the distal end side surface of the insertion section 12 of the balloon type endoscope 10, while a balloon air supply port 18 is provided on the hand operation section 14 side. The port 16 and the balloon air supply port 18 are connected by an air supply tube 19 (see FIG. 4: air flow path) having an inner diameter of about 0.8 mm provided along the insertion portion 12.
[0018]
When the balloon type endoscope 10 is used as a double balloon type endoscope, a balloon (first balloon) 20 is placed on the distal end 70 of the insertion section, and both ends of the balloon 20 are fixed with fixing rubber. Thereby, air is supplied from the balloon air supply port 18 into the balloon 20 through the air supply suction port 16 to inflate the balloon 20 or to suck the air in the balloon 20 to contract the balloon 20. Can be.
[0019]
The overtube 50 shown in FIG. 2 is for inserting the insertion portion 12 of the balloon-type endoscope 10 into the deep part of the small intestine in cooperation with the balloon-type endoscope 10. The balloon endoscope 10 has an inner diameter slightly larger than the outer diameter of the insertion section 12, and has flexibility like the insertion section 12 of the balloon-type endoscope 10.
[0020]
An air supply suction port 52 is formed on the tip side surface of the overtube 50, and a balloon (second balloon) 54 is provided around the tube tip so as to surround the air supply suction port 52. A balloon air supply port 56 is provided at the rear of the overtube 50. The balloon air supply port 56 and the air supply suction port 52 have an inner diameter of about 1 mm integrally formed along the outer periphery of the overtube 50. Are connected by an air supply tube (air flow path) 58. With such a configuration, air is supplied into the balloon 54 from the balloon air supply port 56 through the air supply tube 58 and the air supply suction port 52 to inflate the balloon 54 or to suck air inside the balloon 54, and Can be shrunk. Reference numeral 60 denotes a water inlet for injecting a lubricant (water) into the overtube 50. The water inlet 60 and the balloon air inlet 56 are different in shape and color to visually distinguish each.
[0021]
The balloon control device 100 shown in FIG. 1 applies the balloons 20 and 54 to the balloon 20 at the distal end of the insertion section 70 of the balloon endoscope 10 and the balloon 54 at the distal end of the overtube 50 alternately. It separately supplies air and suctions air, and is composed of a device main body 102 provided with a pump 101 (see FIG. 5: air supply and suction device), a sequencer and the like, and a hand switch 104 for remote control.
[0022]
A power switch SW1, a stop switch SW2, a pressure gauge 106 for the balloon 20, a pressure gauge 108 for the balloon 54, and the like are provided on a front panel of the apparatus main body 102 of the balloon control apparatus 100.
[0023]
Further, tubes (second air flow paths) 110 and 120 for supplying air and sucking air to the balloons 20 and 54 are attached to the front panel of the apparatus main body 102. That is, the distal end of the tube 110 is connected to the air supply tube 19 via the balloon air supply port 18, and the distal end of the tube 120 is connected to the air supply tube 58 via the balloon air supply port 56. The connectors at the distal ends of the tubes 110 and 120 and the connectors to which these connectors are connected are color-coded or formed in different shapes so that the tubes 110 and 120 are not mistakenly connected. .
[0024]
The proximal end of each tube 110, 120 connects to a reservoir tank 130 for the endoscope to prevent backflow of bodily fluids when the balloons 20, 54 are torn, respectively, and a reservoir tank 140 for the overtube. The liquid storage tanks 130 and 140 are detachably attached to a front panel of the apparatus main body 102.
[0025]
On the other hand, the hand switch 104 includes a stop switch SW3 similar to the stop switch SW2 provided on the apparatus body 102 side, and an endoscope ON / OFF switch SW4 for instructing pressurization / decompression of the balloon 20 on the endoscope side. A pause switch SW5 for holding the pressure of the balloon 20 on the endoscope side, an overtube ON / OFF switch SW6 for instructing pressurization / decompression of the balloon 54 on the overtube side, and a balloon 54 on the overtube side. The hand switch 104 is electrically connected to the apparatus main body 102 via a cord 150.
[0026]
FIG. 3 is a perspective view of the distal end 70 of the insertion portion, and FIG. 4 is a sectional view of the distal end 70 of the insertion portion. In the figure, the distal end 70 of the insertion portion is composed of a curved portion 72 and a rigid distal end portion 74, and the curved portion 72 is connected to the distal end of the flexible portion 13 constituting the insertion portion 12 of FIG. The distal end hard portion 74 is densely provided with an objective optical system 76, a pair of illumination lenses 78, 78, a forceps channel (not shown), an air supply / water supply channel (not shown), and the like inside. A CCD is provided on the emission end side of the objective optical system 76 via a prism 80.
[0027]
The output end of the light guide cable 82 is attached to the illumination lens 78. The light guide cable 82 is inserted through the insertion section 12 and connected to a light guide bar (not shown). By connecting the light guide bar to the light source device, light from the light source device is transmitted, and is radiated from the output end of the light guide cable 82 to the subject via the illumination lens 78.
[0028]
At the distal end 70 of the insertion portion, a balloon 20 made of natural rubber and made of a swellable thin film is provided. The balloon 20 is provided at a position covering a part of the curved part 72 and a part of the distal end hard part 74.
[0029]
Further, an air supply tube 19 for supplying and sucking air to the balloon 20 is provided inside the distal end 70 of the insertion portion. Further, as shown in FIG. 4, the base end 19A of the air supply tube 19 is fixed to an elbow pipe 84 (fluid flow path), and the elbow pipe 84 is fitted with a fitting hole of a pipe connecting part 86 formed in the distal end hard part 74. 87. The pipe connecting portion 86 communicates with the air supply suction port 16 through a concave portion 88 communicating with the fitting hole 87, and the air supply suction port 16 is opened on the outer peripheral surface of the distal end hard portion 74.
[0030]
The position where the air supply suction port 16 is formed is the position covered with the balloon 20 and the position where the adhesive 90 for connecting the outer tube 73 constituting the curved portion 72 and the distal end hard portion 74 is applied. It is. The adhesive 90 is applied from above the bobbin portion 92 for fixing the connecting portions of the curved portion 72 and the distal end hard portion 74, solidifies on and around the bobbin portion 92, and swells in the circumferential direction of the distal end hard portion 74. It is formed as a part.
[0031]
A groove 94 communicating with the air supply suction port 16 is formed in the bulging portion of the adhesive 90, and the air supply suction port 16 is opened from the bulge through the groove 94.
[0032]
Next, the air flow path structure of the liquid storage tanks 130 and 140 will be described with reference to FIG. Since the air flow path structure of the liquid storage tank 130 and the liquid storage tank 140 are the same, the air flow path structure of the liquid storage tank 130 will be described here, and the description of the air flow path structure of the liquid storage tank 140 will be omitted.
[0033]
As shown in the figure, the air flow path structure of the liquid reservoir tank 130 includes a tube (first air flow path) 160, a tube (second air flow path) 110, a bypass tube (third air flow path) 162, It comprises a stop valve (first check valve) 164 and a check valve (second check valve) 166.
[0034]
The tube 160 has a proximal end connected to the pump 101 and a distal end penetratingly connected to the liquid reservoir 130. The tube 110 has a distal end connected to the balloon air supply port 18 on the balloon 20 side and a proximal end penetrated and connected to the liquid reservoir tank 130. Further, the bypass tube 162 connects the tube 160 and the tube 110 so as to bypass the distal end of the tube 160 and the proximal end of the tube 110.
[0035]
The check valve 164 is provided at the distal end of the tube 160 and is closed when air is supplied by the pump 101 and opened when air is sucked. The check valve 166 is provided in the bypass tube 162 and is opened when air is supplied by the pump 101 and closed when air is sucked. At the base end of the tube 160, a two-way valve including an air supply valve and an air suction valve is provided, the air supply valve side of the two-way valve is connected to the air supply pump, and the air suction valve side is connected to the air suction pump. May be connected.
[0036]
According to the air flow path structure of the liquid reservoir tank 130 thus configured, when the pump 101 is driven and air is sucked through the tube 160, the check valve 164 provided on the tube 160 is opened, and the bypass tube 162 is opened. Is closed. As a result, air is sucked from the tube 110 by the pump 101 via the liquid reservoir tank 130 and the tube 160. At this time, if the balloon 20 has been torn, the bodily fluid sucked from the tube 110 is stored in the liquid storage tank 130, so that the bodily fluid can be prevented from flowing back to the pump 101.
[0037]
On the other hand, when air is supplied from the pump 101 to the tube 160, the check valve 164 provided on the tube 160 closes, and the check valve 166 provided on the bypass tube 162 opens. Thereby, the air from the pump 101 is supplied from the tube 160 to the balloon 20 via the bypass tube 162 and the tube 110. At this time, even if the body fluid is stored in the liquid reservoir tank 130, the air flows into the tube 110 bypassing the liquid reservoir tank 130, so that the liquid reservoir tank 130 is not pressurized by air. Therefore, it is possible to prevent the bodily fluid stored in the liquid storage tank 130 from flowing back to the endoscope 10 side.
[0038]
FIG. 6 shows a second embodiment of the air flow path structure of the liquid reservoir tank 130. This air flow path structure is a simple type, and the distal end portion of the tube 160 is directly connected to the liquid reservoir tank 130 without providing the bypass tube 162 and the check valves 164 and 166 shown in FIG. Further, the base end of the tube 110 is penetrated and connected to the liquid reservoir tank 130 as it is.
[0039]
According to the air flow path structure shown in FIG. 6, when the pump 101 is driven and air is sucked through the tube 160, the air is sucked from the tube 110 to the pump 101 through the liquid reservoir tank 130 and the tube 160. At this time, if the balloon 20 has been torn, the bodily fluid sucked from the tube 110 is stored in the liquid storage tank 130, so that the bodily fluid can be prevented from flowing back to the pump 101.
[0040]
Further, when air is supplied from the pump 101 to the tube 160, the air is supplied from the tube 160 to the balloon 20 via the liquid reservoir tank 130 and the tube 110. In the case of the air flow path structure of FIG. 6, the distal end of the tube 160 and the proximal end of the tube 110 are sufficiently separated from the bottom of the liquid reservoir tank 130 in consideration of the accumulation of the bodily fluid in the liquid reservoir tank 130. Must be mounted separately.
[0041]
【The invention's effect】
As described above, according to the balloon endoscope according to the present invention, when the body fluid is sucked from the balloon due to the rupture of the balloon on the endoscope side and / or the guide tube side, the body fluid flows through the air flow. Since the liquid is collected in the liquid storage tank connected to the middle part of the road, the body fluid can be prevented from flowing back to the air supply suction device.
[0042]
Further, according to the present invention, when air is supplied from the air supply / suction device to the first air flow path, the first check valve provided in the first air flow path is closed and the third air flow path is closed. Since the provided second check valve opens, air is supplied from the first air flow path to the balloon via the third air flow path and the second air flow path. At this time, even if the bodily fluid is stored in the liquid reservoir tank, the air bypasses the liquid reservoir tank and flows into the second air flow path, so that the liquid reservoir tank is not pressurized. The body fluid can be prevented from flowing back to the endoscope side and / or the guide tube side.
[Brief description of the drawings]
FIG. 1 is a system configuration diagram of an endoscope apparatus to which a balloon-type endoscope according to the present invention is applied. FIG. 2 is an enlarged view of a main part of an overtube. FIG. 3 is an insertion of the endoscope shown in FIG. FIG. 4 is a cross-sectional view of the distal end of the insertion section shown in FIG. 2; FIG. 5 is a structural view showing an air flow path structure of a liquid storage tank; FIG. 6 is another air flow path. Structural diagram showing an embodiment of the structure
DESCRIPTION OF SYMBOLS 10 ... balloon endoscope, 12 ... insertion part, 13 ... flexible part, 14 ... hand operation part, 16 ... air supply suction port, 18 ... balloon air supply port, 19 ... air supply tube, 20 ... balloon, 50 ... Overtube, 54, balloon, 70, distal end of insertion portion, 72, curved portion, 74, rigid portion at tip, 76, objective optical system, 90, adhesive, 94, groove 110, 160, tube, 130, 140 liquid reservoir Tank, 162: bypass tube, 164, 166 ... check valve

Claims (3)

A balloon is provided at the distal end of the endoscope insertion section, and an air supply / suction device is connected to the balloon via an air flow path, and the air supply / suction device supplies and sucks air to expand and contract the balloon. In the type endoscope,
A balloon type endoscope, wherein a liquid storage tank is connected to a middle part of the air flow path. A first balloon is provided at the distal end of the endoscope insertion section, and an air supply / suction device is connected to the first balloon via an air flow path, and air is supplied and sucked by the air supply / suction device. A balloon-type endoscope for expanding and contracting the first balloon;
An overtube into which the endoscope insertion section is inserted, a second balloon is provided at a tip of the overtube, and an air supply / suction device is connected to the second balloon via an air flow path, An air supply / suction device that supplies and sucks air to expand and contract the second balloon.
A balloon-type endoscope, wherein a liquid storage tank is connected to a middle part of the air flow path of the balloon-type endoscope and a middle part of the air flow path of the overtube. The air flow path,
A first air flow path having a base end connected to the air supply suction device side and a front end connected to the liquid reservoir tank;
A second air flow path having a distal end connected to the balloon side and a proximal end connected to the liquid reservoir tank;
A third air flow connecting the first air flow path and the second air flow path so as to bypass the distal end of the first air flow path and the base end of the second air flow path Road and
A first check valve provided at a distal end of the first air flow path, which is closed when air is supplied by the air supply / suction device and opened when air is sucked;
A second check valve provided in the third air flow path, which is opened when air is supplied by the air supply / suction device and closed when air is sucked;
The balloon type endoscope according to claim 1, further comprising:

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