JP2005230450A - Guidewire-type capsule endoscope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a guidewire-type capsule endoscope capable of inserting a guidewire into a deep part of the colon easily and also capable of inserting a capsule endoscope to a target region in a short time using the guidewire as a guide. <P>SOLUTION: The guidewire-type capsule endoscope 1 is provided for inserting the capsule endoscope 3 into lumen using the flexible guidewire 2 as a guide in order to observe the inside of the lumen. The guidewire-type capsule endoscope has the front end section of the guidewire 2 provided with a guidewire introducing member 4 having an outer diameter larger than that of the guidewire 2 and smaller than the diameter of the lumen. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a guide wire type capsule endoscope apparatus that is inserted into a lumen such as a large intestine from the anus and observes the inside of the lumen.

  Endoscopes that are inserted into the human stomach or intestine (large intestine, small intestine, etc.) for observation are provided with a flexible insertion part in the endoscope body, and an illumination optical system and observation are provided at the distal end of the insertion part. A tip configuration portion including an optical system or the like is provided. Then, the insertion portion of the endoscope can be inserted into a body cavity orally or transanally and the inside of the body cavity can be observed.

  Recently, a capsule endoscope that does not require an endoscope insertion portion has been developed (see, for example, Patent Document 1). This capsule endoscope incorporates an illumination optical system, an observation optical system, a battery, a transmission circuit, and the like. The body cavity can be observed in the process of passing.

An image signal picked up by the observation optical system is transmitted by a transmission circuit to a reception circuit outside the body, transmitted from the reception circuit to the monitor, and an observation image is displayed on the monitor.
JP 2003-260025 A

  However, Patent Document 1 swallows the capsule endoscope from the mouth, and observes the inside of the body cavity in the process in which the capsule endoscope naturally passes through the body cavity in the order of the esophagus, stomach, and small intestine. In addition, the capsule endoscope cannot approach the target site in the body cavity. That is, even if a lesion is found while observing the body cavity, the capsule endoscope is close to the lesion and observed at a close distance, or the capsule endoscope is temporarily stopped near the lesion. Cannot be observed.

  The thing of patent documents 1 is a thing swallowed from a mouth, and cannot insert a capsule endoscope into the large intestine alone and observe the lumen of the large intestine. Therefore, in the observation of the large intestine, a large intestine endoscope is used, and the current state is that the insertion portion of the endoscope is inserted transanally into the large intestine for observation and treatment. Colonoscopy is difficult to insert, takes time for examination, and has a problem that the burden on doctors and patients is large.

  The present invention has been made by paying attention to the above circumstances, and the object of the present invention is to insert into the lumen of the large intestine etc. from the anus and observe the inside of the body cavity while moving forward and backward. And it is providing the guide wire type capsule endoscope apparatus which can approach a capsule endoscope to the target site | part in a body cavity.

  In order to achieve the above object, the present invention provides a guide wire type capsule endoscope apparatus in which a capsule endoscope is inserted into a lumen using a flexible guide wire as a guide and the inside of the lumen is observed. A guide wire introducing member having an outer diameter larger than the outer diameter of the guide wire and smaller than the lumen is provided at the distal end portion of the guide wire.

  According to the present invention, the guide wire can be easily inserted deep into the large intestine, and the capsule endoscope can be inserted into the target site in a short time using the guide wire as a guide, greatly reducing the burden on doctors and patients. it can.

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

  1 to 5 show a first embodiment. FIG. 1 shows a guide wire type capsule endoscope apparatus 1. The guide wire type capsule endoscope apparatus 1 includes a guide wire 2 and the guide wire 2 shown in FIG. And a capsule endoscope 3 that is inserted into a body cavity, for example, a large intestine, to observe the inside of the body cavity.

  The guide wire 2 is formed of, for example, a long flexible metal wire, such as a stainless steel wire, and a spherical guide wire introducing member 4 is provided at the distal end portion of the guide wire 2. The guide wire 2 is a single wire of stainless steel wire shown in FIG. 2 (a), a twisted wire of a plurality of stainless wire wires shown in FIG. 2 (b), and a tight winding of stainless steel wire shown in FIG. 2 (c). The coil may be a flex shown in FIG. 4D, in which a thin metal plate is wound in a spiral shape. Further, in order to improve the lubricity of the guide wire 2, a resin layer 2a may be provided on these outer peripheral surfaces by applying a resin coating or a resin tube as shown in FIG. Further, a hydrophilic lubricating coating may be applied to the outer surface, and the guide wire 2 may be Teflon (registered trademark) excellent in lubricity.

  The guide wire introducing member 4 is formed in a spherical shape with a metal or a synthetic resin material. The guide wire introducing member 4 is fixed to the distal end portion of the guide wire 2 by fixing means such as adhesion, pressure bonding, soldering, and welding.

  The dimensional relationship among the guide wire 2, the capsule endoscope 3, and the guide wire introducing member 4 will be described. The outer diameter of the guide wire introducing member 4 is 1 to 3 mm. Is 7 to 30 mmφ smaller than the inner diameter (generally 25 to 35 mmφ) of a lumen such as the large intestine. Moreover, as will be described later, the capsule endoscope 3 is provided with an insertion hole 5 as an insertion portion through which the guide wire 2 is inserted so as to penetrate in the front-rear direction. The outer diameter of the guide wire 2 is smaller than the inner diameter of the insertion hole 5 of the capsule endoscope 3 so that the insertion hole 5 of the capsule endoscope 3 is inserted through the guide wire 2. Further, the outer diameter of the guide wire introducing member 4 is larger than the inner diameter of the insertion hole 5 of the capsule endoscope 3, and the guide wire introducing member 4 is configured not to drop out through the insertion hole 5 of the capsule endoscope 3. Has been.

  Further, a hydrophilic lubrication coating 6 is applied to the surface of the guide wire introducing member 4 to improve lubricity with the inner surface of the lumen. The hydrophilic lubricating coating 6 can also be applied to the surface of the capsule endoscope 3 to improve the lubricity between the capsule endoscope 3 and the inner surface of the lumen.

  Next, the capsule endoscope 3 will be described as shown in FIGS. 3 (a) and 3 (b). That is, the capsule body 7 has a substantially cylindrical shape, and a hemispherical portion is integrally provided at the front portion and the rear portion thereof. The insertion hole 5 is provided at a position eccentric to the axis O of the capsule body 7 so as to penetrate in the front-rear direction.

  An observation window 8 and an illumination window 9 are provided at a position where the insertion hole 5 is avoided at the front portion of the capsule body 7. A solid-state imaging device (hereinafter referred to as a CCD) 10 as an observation optical system for observing the inside of the lumen is provided inside the capsule body 7 so as to face the observation window 8, and the inside of the lumen is opposed to the illumination window 9. An LED 11 is provided as an illumination optical system for illuminating. Further, inside the capsule body 7 are provided a battery 12 and a transmission circuit 13 for transmitting the video signal obtained by the CCD 10 to the outside.

  The insertion hole 5 provided at a position eccentric with respect to the axis O of the capsule body 7 is narrower than the outer diameter of the guide wire 2 opened on the side surface of the capsule body 7 and is elastically deformed, as shown in FIG. By providing the cut 5a that opens, the capsule endoscope 3 can be attached from the middle of the guide wire 2.

  4 and 5 (a) show the use state of the guide wire type capsule endoscope apparatus 1, and the guide wire 2 is inserted into the large intestine 16 as a lumen from the patient's anus 15, and the guide wire 2 is used as a guide. A state where the capsule endoscope 3 is inserted into the large intestine 16 is shown. A sliding tube 17 as a guide tube is attached to the anus 15.

  The sliding tube 17 is made of a material such as synthetic resin or rubber, for example, and the cylindrical body 19 does not enter the large intestine 16 at the base end portion of the cylindrical body 19 having the guide hole 18 through which the guide wire 2 is inserted. A flange-like stopper 20 to be stopped is integrally provided. Further, the cylinder 19 is provided with a filth collection bag 21 for collecting the filth discharged to the outside through the guide hole 18 and preventing the surroundings from being contaminated.

  Next, a procedure for inserting the capsule endoscope 3 into the large intestine 16 using the guide wire 2 as a guide will be described.

  First, the insertion hole 5 of the capsule endoscope 3 is inserted into the guide wire 2 from the distal side of the guide wire 2 outside the body cavity. Next, the guide hole 18 of the sliding tube 17 is inserted into the guide wire 2 from the end side of the guide wire 2.

  In this state, the guide wire introducing member 4 at the distal end portion of the guide wire 2 is inserted into the large intestine 16 from the anus 15, and then the capsule endoscope 3 is inserted into the large intestine 16 using the guide wire 2 as a guide. Finally, the cylindrical body 19 of the sliding tube 17 is attached to the anus 15. Next, when the guide wire 2 is pushed toward the deep part of the large intestine 16 using the guide hole 18 of the sliding tube 17 as a guide, the guide wire introducing member 4 at the distal end of the guide wire 2 advances while sliding on the inner surface of the large intestine 16. Since the guide wire 2 has flexibility and the resin layer is provided on the surface, the guide wire 2 can be pushed smoothly while being curved following the curved shape of the large intestine 16.

  At this time, since the guide wire introducing member 4 is spherical and has a hydrophilic lubricating coating 6 on its surface, the guide wire introducing member 4 moves forward smoothly over the colonic diverticulum, unevenness and folds on the inner surface of the large intestine 16, When the introduction member 4 reaches the cecum at the end point, the pushing of the guide wire 2 is stopped.

  Next, the capsule endoscope 3 is advanced toward the deep part of the large intestine 16 by pushing the capsule endoscope 3 forward by another member with the guide wire 2 inserted into the large intestine 16 or causing it to self-run. At this time, the inside of the large intestine 16 is illuminated by the LED 11 provided in the capsule endoscope 3 and the CCD 10 moves forward while observing the inside of the large intestine 16. The video signal obtained by the CCD 10 is transmitted to the external receiving circuit 22 by the transmitting circuit 13 and can be displayed on the monitor 23.

  Accordingly, the capsule endoscope 3 can observe the inner surface of the capsule endoscope 3 while moving forward in the large intestine 16 and project the lesioned portion or the like on the external monitor 23. Can be displayed on an external monitor 23.

  Further, even if filth is discharged from the large intestine 6 during observation in the large intestine 16, it can be collected by the filth collection bag 21. Moreover, since the guide wire 2 does not directly contact the inner surface of the anus 15 by attaching the cylindrical body 19 of the sliding tube 17 to the anus 15, there is no possibility of damaging the anus 15, and even in the patient, Discomfort is reduced.

  In the first embodiment, illumination is performed by the LED 11 provided in the capsule endoscope 3, observation is performed by the CCD 10, and a video signal obtained by the CCD 10 is transmitted to the external reception circuit 22 by the transmission circuit 13. However, the LED 11 and the CCD 10 inside the capsule endoscope 3 can be controlled from an external control circuit. Further, instead of the CCD 10, a tomographic image may be obtained as an ultrasonic transducer or a nuclear magnetic resonance coil, or a combination with the CCD 10 may be used. By obtaining a tomographic image, a deep lesion site can be found.

  In the first embodiment, the filth collection bag 21 is provided in the sliding tube 17 to collect the filth discharged from the large intestine 6 during observation in the large intestine 16. However, as shown in FIG. 5B, a valve 24 may be provided to prevent the discharge of filth.

  FIG. 6 shows a second embodiment, and the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted. The guide wire introducing member 31 of the present embodiment is a substantially spherical hard member formed of a synthetic resin material or the like. The outer diameter of the hemispherical portion on the distal end side 31a of the guide wire introducing member 31 is formed as a small diameter a, and the outer diameter of the hemispherical portion on the proximal end portion 31b is formed as a large diameter b, and the distal end side 31a and the proximal end portion are formed. A continuous tapered surface 31c is formed between the side 31b. Further, the outer diameter b of the proximal end 31 b of the guide wire introducing member 31 is smaller than the inner diameter of a lumen such as the large intestine and larger than the inner diameter of the insertion hole 5 of the capsule endoscope 3.

  Since the guide wire introducing member 31 configured as described above is formed on the tapered surface 31c that gradually increases in diameter from the distal end portion 31a toward the proximal end portion 31b, the guide wire 2 is inserted into the deep portion of the large intestine 16. When pushed forward, the guide wire introducing member 31 has an effect of smoothly moving forward while sliding on the inner surface of the large intestine 16.

  FIG. 7 shows a third embodiment, and the same components as those in the first and second embodiments are denoted by the same reference numerals and description thereof is omitted. The guide wire introducing member 32 of the present embodiment is a balloon member formed of silicon rubber or the like, and maintains a substantially spherical shape when inflated by a fluid. The outer diameter of the hemispherical portion on the distal end side 32a of the guide wire introducing member 32 is small, and the outer diameter of the hemispherical portion on the proximal end side 32b is large, and the distal end side 32a and the proximal end side 32b are formed. Is formed on a continuous tapered surface 32c.

  The guide wire 33 is in a tube shape having a fluid passage 34, the distal end portion communicates with a guide wire introducing member 32 made of a balloon, and a proximal end portion with a check valve to which a fluid supply device 35 such as a syringe can be detachably attached. A base 36 is provided. Therefore, when a fluid is supplied from the fluid supply device 35 to the fluid passage 34, the guide wire introducing member 32 made of a balloon expands into a substantially spherical shape, and the guide wire introducing member 32 of the large intestine 16 is formed as in the second embodiment. The shape is easy to move forward smoothly while sliding on the inner surface.

  Further, when the fluid is further supplied from the fluid supplier 35 to the fluid passage 34, the guide wire introducing member 32 further expands and presses against the inner wall of the large intestine 16, so that the guide wire introducing member 32 is in close contact with and fixed to the inner wall of the large intestine 16. Can be made. Further, when the guide wire 33 is pulled toward the hand side in a state where the guide wire introducing member 32 is in close contact with and fixed to the inner wall of the large intestine 16, the curved large intestine 16 becomes substantially straight and the capsule endoscope 3 is easily pushed forward. be able to.

Since the guide wire 33 is provided with the check valve cap 36, when the fluid supply unit 35 is removed, the check valve is closed and the fluid in the guide wire introducing member 32 does not leak. There is no original shape. Further, since the fluid supply device 35 contracts when the fluid of the guide wire introducing member 32 is extracted, a gap is formed between the inner wall of the large intestine 16 and the guide wire introducing member 32, and the guide wire introducing member 32 is smoothly removed from the large intestine 16. Can be extracted. The fluid supplied to the balloon includes a gas such as O ₂ and CO _{2 and a} liquid such as physiological saline.

  FIG. 8 shows a fourth embodiment, and the same components as those in the first to third embodiments are denoted by the same reference numerals and description thereof is omitted. The guide wire introduction member 37 of the present embodiment is a balloon formed of silicon rubber or the like, and maintains a spherical shape when inflated by a fluid. A connection port 38 is provided at the proximal end portion of the guide wire introducing member 37.

  A connection port 38 of a guide wire introducing member 37 is fitted to a distal end portion of a tubular guide wire 33 having a fluid passage 34. A synthetic fiber yarn 39 is wound around the connection port 38 and further bonded by an adhesive 40, and a guide wire introducing member 37 is fixed to the guide wire 33. Note that the connection port 38 of the guide wire introducing member 37 may be welded to the guide wire 33.

  Accordingly, when a fluid is supplied from the fluid supply device 35 to the fluid passage 34, the guide wire introduction member 37 made of a balloon expands and becomes spherical, and the guide wire introduction member 32 becomes the inner surface of the large intestine 16 as in the third embodiment. The shape is easy to move forward smoothly while sliding. Further, when the fluid is further supplied from the fluid supply device 35 to the fluid passage 34, the guide wire introducing member 37 is further expanded and pressed against the inner wall of the large intestine 16, so that the guide wire introducing member 37 is closely attached and fixed to the inner wall of the large intestine 16. Can be made.

  FIG. 9 shows a modification of the fourth embodiment, and a communication hole 34 a communicating with the fluid passage 34 is formed in the peripheral wall at the distal end portion of the tubular guide wire 33 having the fluid passage 34. A guide wire introducing member 37a made of a cylindrical balloon is fitted to the peripheral wall at the distal end portion of the guide wire 33 so as to cover the communication hole 34a. Synthetic fiber yarns 39 are wound around the opening portions at both ends of the guide wire introducing member 37 a and further adhered by an adhesive 40, and the guide wire introducing member 37 a is fixed to the guide wire 33. Therefore, when the fluid is supplied from the fluid passage 34, the fluid is supplied to the inside of the guide wire introducing member 37 through the communication hole 34a, and the guide wire introducing member 37a expands and can be pressed against the inner wall of the large intestine 16. .

  FIG. 10 shows a fifth embodiment, and the same components as those of the first embodiment are denoted by the same reference numerals and description thereof is omitted. The guide wire introducing member 41 of the present embodiment is formed in a substantially spherical shape by using a soft fluororesin having elasticity or the like. As shown in (a), the guide wire introducing member 41 is substantially spherical when no external force is applied, but when inserted into the large intestine 16, it follows the shape of its lumen as shown in (b). Further, the shape is changed (elastically deformed). Therefore, when the guide wire 2 is inserted into the large intestine 16, the shape of the guide wire introducing member 41 changes in accordance with the shape of its lumen. is there.

  FIG. 11 shows a sixth embodiment, and the same components as those of the first embodiment are denoted by the same reference numerals and description thereof is omitted. In the present embodiment, the guide wire 2 is provided with a bougie member 42 that is movable in the axial direction thereof. The bougie member 42 is disposed between the guide wire introducing member 4 at the distal end portion of the guide wire 2 and the capsule endoscope 3. The bougie member 42 is formed of, for example, a synthetic resin material, the tip end portion 42 a and the end portion 42 b are tapered, and the maximum outer diameter portion 42 c is formed with a small diameter by the inner diameter of the large intestine 16.

  By providing the bougie member 42 so as to be movable in the axial direction of the guide wire 2, before the capsule endoscope 3 is pushed deep into the large intestine 16, the stenosis portion can be expanded by the bougie member 42. Then, the lumen through which the capsule endoscope 3 cannot pass can be recognized in advance, and the capsule endoscope 3 can be smoothly pushed forward.

  Further, after the observation, when the guide wire 2 is extracted from the large intestine 16, the bougie member 42 engages with the guide wire introducing member 4 and is taken out together with the capsule endoscope 3.

  Note that the number of bougie members 42 is not limited to one, and one bougie member 42 may be disposed before and after the capsule endoscope 3. The material of the bougie member 42 is a material that dissolves when left in the body for a certain period of time. May be produced.

  FIG. 12 shows a seventh embodiment, and the same components as those of the fifth embodiment are denoted by the same reference numerals and description thereof is omitted. The guide wire introducing member 43 of the present embodiment is formed into a hollow sphere by a synthetic resin material. One or a plurality of liquid ejection portions 44 that open toward the front are provided in the front portion of the guide wire introducing member 43.

  The guide wire 45 has a tube shape having a liquid passage 46, the distal end portion communicates with the hollow portion of the guide wire introducing member 43, and the proximal end portion has a check valve to which a liquid supply unit 47 such as a syringe can be detachably attached. A base 48 is provided. Accordingly, when the liquid is supplied from the liquid supplier 47 to the liquid passage 46, the liquid can be ejected into the large intestine 16 from the liquid ejecting portion 44 of the guide wire introducing member 43.

  Accordingly, in the process of pushing the guide wire 45 toward the deep part of the large intestine 16, when a lubricating liquid such as physiological saline is supplied from the liquid supply unit 47 to the liquid passage 46, the large intestine 16 is discharged from the liquid ejection part 44 of the guide wire introducing member 43. Lubricating liquid can be ejected into the interior. By spraying the lubricating liquid onto the large intestine 16, the frictional resistance between the inner wall of the large intestine 16 and the surface of the guide wire introducing member 43 is reduced, and the guide wire introducing member 43 advances smoothly while sliding on the inner surface of the large intestine 16. effective. In addition, it is also possible to eject the intestinal irrigation liquid from the liquid ejection part 44 instead of the lubricating liquid ejected from the liquid ejection part 44 of the guide wire introducing member 43 into the large intestine 16.

  FIG. 13 shows a modification of the guide wire 45, and FIG. 13A shows a guide wire 2 according to the first embodiment with a tube 50 constituting a liquid passage 49 attached thereto. (B) is a guide wire 54 in which a densely wound coil 53 is wound around the outer periphery of a tube 52 constituting the liquid passage 51. (C) is a guide wire 56 in which a flex 55 is wound around the outer periphery of a tube 52 constituting the liquid passage 51.

  FIG. 14 shows an eighth embodiment. As shown in FIG. 14A, the guide wire introducing member 57 of the present embodiment includes an inner bag 58 as a balloon that is inflated and deflated by a fluid, and an outer side of the inner bag 58. Is formed in a double bag structure with an outer bag 60 having one or a plurality of fluid ejection portions 59 opened forward on the peripheral wall.

  The inner bag 58 communicates with a fluid passage 62 provided along the axial direction of the guide wire 61, and the outer bag 60 communicates with a liquid passage 63 parallel to the fluid passage 62, as shown in FIG. . Therefore, the fluid can be supplied from the fluid passage 62 to the inner bag 58 to inflate the inner bag 58 made of a balloon. Further, the liquid can be sent from the liquid passage 63 to the outer bag 60 and the liquid can be ejected from the fluid ejection part 59 into the large intestine 16, and the same effect as in the seventh embodiment can be obtained.

  FIG. 15 shows a modification of the eighth embodiment, in which the guide wire 64 is constituted by a multi-lumen tube. The central fluid passage 65 communicates with an inner bag 58 made of a balloon, and the surrounding liquid passage 66 is It communicates with the outer bag 60.

  FIG. 16 shows a ninth embodiment, and the same components as those of the seventh embodiment are denoted by the same reference numerals and description thereof is omitted. The guide wire introducing member 67 of this embodiment is formed in a bullet shape from a synthetic resin material. At the front portion of the guide wire introducing member 67, a single liquid ejection portion 68 that opens forward is provided.

  The guide wire 45 has a tube shape having a liquid passage 46, and a distal end portion thereof communicates with a liquid ejection portion 68 of the guide wire introducing member 67, and a proximal end portion is connected to a liquid pump 70 such as a roller pump via a connector 69. Yes. The liquid pump 70 is turned on / off by a switch 71 so that the chemical liquid in the liquid tank 72 can be supplied. The chemical solution is, for example, an intestinal rinsing solution such as a polyethylene glycol isotonic aqueous solution, a dye, a contrast agent, and the like.

  Accordingly, in the process of pushing the guide wire 45 toward the deep portion of the large intestine 16, when the switch 71 is turned on and the chemical solution is supplied from the liquid pump 70 to the liquid passage 46, the liquid ejection portion 68 of the guide wire introducing member 67 enters the large intestine 16. The chemical solution can be ejected. That is, in the case of capsule endoscopy observation of the inner wall of the large intestine 16, intestinal lavage fluid, in the case of dye observation with the capsule endoscope 3, the dye, and in the case of observation in combination with X-ray imaging, the contrast agent Can be observed.

  FIG. 17 shows the tenth embodiment, and the same components as those of the ninth embodiment are denoted by the same reference numerals and description thereof is omitted. The guide wire introducing member 67 of this embodiment is formed in a bullet shape from a synthetic resin material. A plurality of liquid ejection portions 73 opening rearward are provided at the rear portion of the guide wire introducing member 67.

  The guide wire 45 has a tube shape having a liquid passage 46, and the tip portion communicates with the liquid ejection portion 73 of the guide wire introducing member 67. A proximal end portion of the guide wire 45 is connected to a liquid pump 70 such as a roller pump via a connector 69. The liquid pump 70 is turned on / off by a switch 71 so that the liquid in the liquid tank 72 can be supplied.

  Therefore, in the process of pushing the guide wire 45 toward the deep part of the large intestine 16, when the switch 71 is turned on and the liquid is supplied from the liquid pump 70 to the liquid passage 46, the liquid jet part 73 of the guide wire introducing member 67 moves backward. By ejecting the liquid, a propulsive force can be obtained, and the guide wire introducing member 67 can be propelled toward the deep part of the large intestine 16. In this case, by applying a hydrophilic lubricating coating to the surface of the guide wire introducing member 67, the guide wire introducing member 67 can be further smoothly advanced toward the deep part of the large intestine 16.

  FIG. 18 shows an eleventh embodiment and is an overall configuration diagram of a guide wire type capsule endoscope apparatus. The guide wire introducing member 75 of this embodiment is formed in a hollow shell shape with rubber or a synthetic resin material. Inside the guide wire introducing member 75, there is provided a vibration generating portion 79 that includes a small motor 76 and an eccentric weight 78 that is eccentrically fixed to a rotating shaft 77 of the small motor 76.

  The guide wire 80 is formed by a coil sheath or a super elastic pipe, and an electric supply line 81 is inserted through the guide wire 80. One end of the electricity supply line 81 is connected to a small motor 76 in the guide wire introducing member 75, and the other end is connected to an external power source 83 via an electric connector 82. The power supply 83 is provided with a switch 84 so that the small motor 76 can be turned on and off.

  The insertion hole 5 of the capsule endoscope 3 similar to that of the first embodiment is inserted into the guide wire 80 so as to freely advance and retract. A grip 85 slidable with respect to the guide wire 80 is provided on the proximal side of the capsule endoscope 3.

  Accordingly, when the switch 84 is turned on in the process of pushing the guide wire 80 toward the deep part of the large intestine 16 using the guide wire introducing member 75 as a guide, the small motor 76 is driven and the eccentric weight 78 is turned. As the eccentric weight 78 turns, the guide wire introducing member 75 vibrates. Therefore, the guide wire introducing member 75 does not adhere to the inner wall of the large intestine 16 and a peeling action occurs. Frictional resistance at the time of pushing forward toward the deep part is reduced, and smooth progress can be achieved. In this case, by applying a hydrophilic lubricating coating to the surface of the guide wire introducing member 75, the guide wire introducing member 75 can be further smoothly advanced toward the deep part of the large intestine 16.

  FIG. 19 shows a twelfth embodiment, and the same components as those of the eleventh embodiment are given the same reference numerals and the description thereof is omitted. A vibration member 86 is provided inside the guide wire introducing member 75 of the present embodiment. A vibration transmission member 87 made of a flexible rod-like body is inserted into the guide wire 80. One end of the vibration transmission member 87 is connected to the vibration member 86 in the guide wire introducing member 75, and the other end is connected to an external vibration generation source 89 via a vibration transmission connector 88. The vibration generating source 89 is provided with a switch 90 so that the vibration generating source 89 can be turned on / off.

  Therefore, when the switch 90 is turned on in the process of pushing the guide wire 80 toward the deep part of the large intestine 16 with the guide wire introducing member 75 as a guide, the vibration generating source 89 is driven to generate vibration. Since the vibration of the vibration generation source 89 is transmitted to the vibration member 86 via the vibration transmission member 87, the guide wire introducing member 75 vibrates. When the guide wire introducing member 75 vibrates, it does not adhere to the inner wall of the large intestine 16 and a peeling action occurs. Therefore, the friction resistance when pushing the guide wire introducing member 75 toward the deep part of the large intestine 16 is reduced, and the guide wire introducing member 75 proceeds smoothly. Can be made.

  FIG. 20 shows a thirteenth embodiment, and the same components as those in the twelfth embodiment are given the same reference numerals and explanations thereof are omitted. A hard member 91 is provided inside the guide wire introducing member 75 of the present embodiment. A push rod 92 made of a flexible rod-like body is inserted into the guide wire 80 so as to be able to advance and retreat. One end of the push rod 92 is brought close to the hard member 91 in the guide wire introducing member 75, and the other end is connected to an external vibration generating source 89 via a connector 93. The vibration generating source 89 is provided with a switch 90 so that the vibration generating source 89 can be turned on / off.

  Therefore, when the switch 90 is turned on in the process of pushing the guide wire 80 toward the deep part of the large intestine 16 with the guide wire introducing member 75 as a guide, the vibration generating source 89 is driven to generate vibration. The vibration of the vibration generating source 89 is transmitted to the push rod 92, and the push rod 92 vibrates forward and backward in the axial direction to strike the hard member 91. By striking the hard member 91, the guide wire introduction member 75 vibrates in the front-rear direction. When the guide wire introducing member 75 vibrates in the front-rear direction, a propulsive force is generated. Therefore, the frictional resistance when pushing the guide wire introducing member 75 toward the deep part of the large intestine 16 is reduced, and the guide wire introducing member 75 can be smoothly advanced.

  FIG. 21 shows a fourteenth embodiment, and the same components as those of the first embodiment are denoted by the same reference numerals and description thereof is omitted. The guide wire 94 of the present embodiment includes an inner guide wire 95 made of, for example, a metal wire having flexibility, and an outer guide wire 96 made of, for example, a synthetic resin tube having flexibility. An outer guide wire 96 is fitted to 95 so as to be movable forward and backward in the axial direction. A spherical guide wire introducing member 4 having a diameter larger than the inner diameter of the outer guide wire 96 is provided at the distal end portion of the inner guide wire 95.

  According to the guide wire 94 configured as described above, when the guide wire 94 is inserted into the large intestine 16 from the anus 15, the guide wire introducing member 4 is positioned at the distal end portion of the outer guide wire 96. In this state, the guide wire 94 is pushed forward toward the deep part of the large intestine 16. If the guide wire 94 stops moving forward, if only the inner guide wire 95 is pushed forward from the hand side, the distal end of the inner guide wire 95 is pushed. The guide wire introducing member 4 is separated from the distal end portion of the outer guide wire 96, and the inner guide wire 95 advances. Next, when the outer guide wire 96 is pushed forward from the hand side, the outer guide wire 96 advances with the inner guide wire 95 as a guide. By repeating this operation, the guide wire 94 can be easily pushed toward the deep part of the large intestine 16.

  When the distal end of the guide wire 94 reaches the target site, for example, the cecum, the insertion hole 5 of the capsule endoscope 3 is inserted into the outer guide wire 96, and the capsule endoscope 3 is moved using the outer guide wire 96 as a guide. It can be pushed or self-propelled by another member. In this case, since the guide wire 94 has a double structure, the waist is strong and the capsule endoscope 3 can be smoothly guided to the deep part.

  According to each of the embodiments, the configuration is obtained as follows.

  (Supplementary note 1) In a guide wire type capsule endoscope apparatus in which a capsule endoscope is inserted into a lumen using a flexible guide wire as a guide, and the inside of the lumen is observed, A guide wire type capsule endoscope apparatus provided with a guide wire introducing member having an outer diameter larger than the outer diameter of the guide wire and smaller than the lumen.

  (Supplementary note 2) The guide wire capsule endoscope apparatus according to supplementary note 1, wherein the capsule endoscope has an insertion portion through which the guide wire is inserted.

  (Additional remark 3) The guide wire type capsule endoscope apparatus according to Additional remark 2, wherein the insertion portion is an insertion hole penetrating in the front-rear direction of the capsule endoscope.

  (Additional remark 4) The said insertion part is a penetration hole which has a cut | interruption which can penetrate a capsule endoscope from the middle part of the said guide wire, The guide wire type | mold capsule endoscope apparatus of Additional remark 2 characterized by the above-mentioned.

  (Additional remark 5) The guide wire type capsule endoscope apparatus according to additional remark 1, wherein the guide wire is a flexible metal wire.

  (Additional remark 6) The guide wire type capsule endoscope apparatus according to additional remark 5, wherein a resin layer is applied to a surface of a flexible metal wire.

  (Additional remark 7) The guide wire type capsule endoscope apparatus according to additional remark 1, wherein the guide wire is a non-magnetic material.

  (Supplementary note 8) The guide wire capsule endoscope apparatus according to supplementary note 6, wherein the resin layer is a biocompatible material.

  (Supplementary note 9) The guidewire capsule endoscope apparatus according to supplementary note 1, wherein the guidewire introduction member is fixed to a distal end portion of the guidewire by a fixing means such as adhesion, pressure bonding, or welding.

  (Supplementary note 10) The guidewire capsule endoscope apparatus according to supplementary note 1, wherein a hydrophilic lubricating coating is applied to a surface of at least one of the guidewire and the guidewire introduction member.

  (Additional remark 11) The guide wire introduction | transduction capsule apparatus of Additional remark 1 characterized by the above-mentioned. The guide wire introduction | transduction member is spherical shape and the outer diameter is larger than the internal diameter of the insertion part of a capsule endoscope.

  (Supplementary note 12) The guidewire-type capsule according to Supplementary note 1, wherein the guidewire introduction member has a substantially spherical shape, and has a small outer diameter on the distal end side and a large outer diameter on the proximal end side. Endoscopic device.

  (Supplementary note 13) The guidewire according to supplementary note 1, wherein the guide wire introduction member is a substantially spherical hard member, and has a small outer diameter on the distal end side and a large outer diameter on the proximal end side. Type capsule endoscope device.

  (Supplementary Note 14) The guide wire introducing member has a substantially spherical shape when filled with a fluid and expands, and has a small outer diameter on the distal end side and a large outer diameter on the proximal end side. The guide wire type capsule endoscope apparatus according to Supplementary Note 1, wherein the guide wire type capsule endoscope apparatus is characterized.

  (Supplementary note 15) The guidewire capsule endoscope apparatus according to supplementary note 1, wherein the guidewire introduction member is made of a substantially spherical elastic member, and the shape changes following the shape of the lumen.

  (Supplementary Note 16) A bougie member having a taper shape with a tapered tip and a distal end and a maximum outer diameter larger than the outer diameter of the capsule endoscope is inserted into the guide wire so as to freely advance and retract. The guide wire type capsule endoscope apparatus according to Supplementary Note 1, wherein the guide wire type capsule endoscope apparatus is characterized.

  (Supplementary Note 17) The guide wire introduction member has a fluid ejection portion that opens forward at a distal end portion, and can inject intestinal lavage fluid from the fluid ejection portion when inserted into a lumen. The guide wire capsule endoscope apparatus according to appendix 1.

  (Supplementary Note 18) The guide wire introduction member has a fluid ejection portion that opens rearward at a proximal end portion, and obtains propulsive force by ejecting fluid from the fluid ejection portion when inserted into a lumen. The guide wire type capsule endoscope apparatus according to appendix 1.

  (Supplementary note 19) The guidewire-type capsule endoscope apparatus according to supplementary note 1, wherein the guidewire introducing member has a vibration generating portion therein.

  (Supplementary note 20) The guide wire introduction member according to supplementary note 1, wherein the guide wire introducing member has a vibration portion inside, and the vibration portion is interlocked by a vibration generation source outside the body and a vibration transmission member. Capsule endoscope device.

  (Supplementary note 21) The guide wire introducing member has a double bag structure of an inner bag that expands and contracts by gas and an outer bag that is fitted on the outer side of the inner bag and has at least one hole in the peripheral wall. The guide wire capsule endoscope apparatus according to appendix 1, wherein the inner bag communicates with a gas passage, and the outer bag communicates with a liquid passage.

  (Supplementary note 22) The guide wire capsule endoscope apparatus according to supplementary note 1, wherein the gas passage and the liquid passage are provided in the guide wire.

  (Supplementary note 23) The guide wire capsule endoscope apparatus according to supplementary note 1, wherein the gas passage and the liquid passage are tubes provided along the guide wire.

  (Additional remark 24) The guide wire type capsule endoscope apparatus according to Additional remark 1, wherein the guide wire includes a multi-lumen tube forming the gas passage and the liquid passage.

  (Supplementary Note 25) The guide wire has a double structure including an inner guide wire having a guide wire introducing member at a distal end portion and an outer guide wire which is fitted to the inner guide wire and is relatively movable in the axial direction. The guide wire type capsule endoscope apparatus according to appendix 1, wherein the guide wire type capsule endoscope apparatus is provided.

  (Additional remark 26) The inner guide wire having the guide wire introducing member is inserted into the lumen in advance, and the outer guide wire is inserted into the lumen using the inner guide wire as a guide. The guidewire type capsule endoscope apparatus as described.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Moreover, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine suitably the component covering different embodiment.

BRIEF DESCRIPTION OF THE DRAWINGS The 1st Embodiment of this invention is shown, The schematic block diagram of a guide wire type | mold capsule endoscope apparatus. The embodiment is shown, (a)-(d) is a cross-sectional view and a partial vertical cross-sectional view showing a modification of the guide wire. The capsule endoscope of the embodiment is shown, (a) is a longitudinal side view, (b) is a front view, and (c) is a front view showing a modification. Action | operation explanatory drawing of the same embodiment. The same embodiment is shown, (a) is sectional drawing which shows the use condition of a sliding tube, (b) is sectional drawing which shows the modification of a sliding tube. The side view of the guide wire introduction member which shows 2nd Embodiment of this invention. The whole block diagram which showed the 3rd Embodiment of this invention, and cut | disconnected some guide wire type | mold capsule endoscope apparatuses. The whole block diagram which showed the 4th Embodiment of this invention and cut | disconnected some guide wire type | mold capsule endoscope apparatuses. The side view of the guide wire which carried out the partial cross section which shows the modification of the embodiment. The 5th Embodiment of this invention is shown, (a) is a side view of a guide wire introduction member, (b) is a side view of a state where the guide wire introduction member is deformed The schematic block diagram of the guide wire type | mold capsule endoscope apparatus which shows 6th Embodiment of this invention. The perspective view of the guide wire type capsule endoscope apparatus which shows 7th Embodiment of this invention. The embodiment is shown and (a)-(c) is a vertical side view which shows the modification of a guide wire. The 8th Embodiment of this invention is shown, (a) is a longitudinal side view of a guide wire introducing member, and (b) is a sectional view of the guide wire along the line AA. Sectional drawing of the guide wire which shows the modification of the embodiment. The perspective view of the guide wire type capsule endoscope apparatus which shows 9th Embodiment of this invention. The perspective view of the guide wire introducing | transducing member which shows 10th Embodiment of this invention. The schematic block diagram of the guide wire type | mold capsule endoscope apparatus which shows 11th Embodiment of this invention. The twelfth embodiment of the present invention and a schematic configuration diagram of a guide wire type capsule endoscope apparatus. The 13th Embodiment of this invention is shown, The schematic block diagram of a guide wire type | mold capsule endoscope apparatus. The 14th Embodiment of this invention is shown, The schematic block diagram of a guide wire type | mold capsule endoscope apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Capsule endoscope apparatus, 2 ... Wire guide, 3 ... Capsule endoscope, 4 ... Guide wire introduction member

Claims (1)

A guide wire-type capsule endoscope apparatus that inserts a capsule endoscope into a lumen using a flexible guide wire as a guide, and observes the inside of the lumen,
A guide wire type capsule endoscope apparatus, wherein a guide wire introducing member having an outer diameter larger than an outer diameter of the guide wire and smaller than an outer diameter of the guide wire is provided at a distal end portion of the guide wire.

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