JP2005230444A - 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 the 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. The capsule endoscope 3 has a CCD 14 on its front end section 11 for observing the inside of the lumen, LEDs 15a and 15b for illuminating the inside of the lumen and an insertion hole 5 for inserting the guidewire 2. The insertion hole 5, the CCD 14 and the LEDs 15a, 15b are arranged on a plane M located on the front end section 11 side of the capsule endoscope. When a tangent line L that contacts the circumference 21 of the plane M at a position nearest to the insertion hole 5 is considered, each of the CCD 14 and the LEDs 15a and 15b is arranged at a position having a distance that is longer than the maximum distance A between the tangent line L and the insertion hole 5 from the tangent line. <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.

  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 inserts a capsule endoscope into a lumen using a flexible guide wire as a guide, and observes the inside of the lumen at the end of the capsule endoscope in the traveling direction. A guide wire type capsule endoscope device including an observation optical system for illuminating, an illumination optical system for illuminating the inside of the lumen, and an insertion portion for inserting the guide wire. At the end, the observation optical system and the illumination optical system are separated from the tangent of the outer peripheral surface at the end in the traveling direction that is closest to the insertion portion, than the longest distance between the tangent and the insertion portion. It is provided in a different position.

  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.

  In addition, since the distance between the observation optical system and the guide wire can be secured, the field of view of the observation optical system can be secured, and the shadow of the guide wire by the illumination optical system can be prevented from entering the field of view of the observation optical system. The inside of the lumen can be observed well.

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

  1 to 4 show a first embodiment, and 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. The capsule endoscope 3 is inserted into a lumen in a body cavity, for example, the large intestine 13 as a guide, and the inside of the lumen is observed.

  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 as shown in FIG. 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. The guide wire 2 may be Teflon (registered trademark) excellent in lubricity.

  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 10-30 mmφ smaller than the inner diameter (generally 25-35 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 guide wire 2 can be inserted into the insertion hole 5 of the capsule endoscope 3.

  Next, the capsule endoscope 3 will be described with reference to FIGS. 3 (a), (b), and (c). FIG. 3A is a perspective view showing a state in which the capsule endoscope 3 has inserted the guide wire 2 through the insertion hole 5.

  FIG. 3B is a cross-sectional view of the capsule endoscope 3 along the front-rear direction. The capsule endoscope 3 includes, for example, a substantially cylindrical capsule main body 10 and a substantially transparent cover 12 that covers the front end 11 of the capsule main body 10. The capsule main body 10 is integrally provided with a hemispherical portion at the rear thereof.

  As shown in FIG. 3C, for example, an insertion hole 5 is provided in the front end portion 11 of the capsule main body portion 10 at a position eccentric from the axis 0 of the capsule main body portion 10. FIG. 3C is a front view of the capsule endoscope 3. In addition, the front end portion 11 is provided with a solid-state imaging device (hereinafter referred to as a CCD) 14 as an observation optical system for observing the inside of the large intestine 13. Further, as illumination optical systems for illuminating the inside of the large intestine 13, for example, LEDs 15a and 15b are provided.

  As shown in FIG. 3B, the shape of the front end portion 11 is a protruding portion 20 that protrudes toward the front, for example, in the vicinity of the insertion hole 5. Note that the cover portion 12 is formed corresponding to the shape of the front end portion 11, and the combined shape of the protruding portion 20 and the cover portion 12 is substantially hemispherical.

  The arrangement of the insertion hole 5, the CCD 14, and the LEDs 15a and 15b will be described in detail with reference to (b) and (c) of FIG. As shown in FIGS. 3B and 3C, the position closest to the insertion hole 5 on the peripheral edge (outer peripheral surface) 21 of the plane M where the insertion hole 5 of the front end portion 11, the CCD 14, and the LEDs 15 a and 15 b are arranged. Let L be the tangent line that contacts P. At this time, the distance from the tangent L to the farthest position Q of the insertion hole 5 is A. Next, let B be the shortest distance from the tangent L to the LED 15a. Similarly, let C be the shortest distance to the LED 15b. Similarly, let D be the shortest distance to the CCD 14.

  At this time, the LEDs 15a and 15b and the CCD 14 are arranged such that the relationship of the shortest distances to the tangent line L is A <B, A <C, A <D, and D is the maximum length. That is, the CCD 14 is provided at a position farthest from the insertion hole 5.

  Inside the capsule body 10, a battery 22 and a transmission circuit 23 for transmitting the video signal obtained by the CCD 14 to the outside are provided. The CCD 14 and the LEDs 15a and 15b are integrally incorporated in, for example, the transmission circuit 23, and the transmission circuit 23 covers, for example, the opening of the front end portion 11 of the capsule body 10.

  4 (a) and 4 (b) show the use state of the guide wire type capsule endoscope apparatus 1. The guide wire 2 is inserted into the large intestine 13 as a lumen from the anus 16 of the patient. A state in which the capsule endoscope 3 is inserted into the large intestine 13 with reference to FIG.

  Next, a procedure for inserting the capsule endoscope 3 into the large intestine 13 using the guide wire 2 as a guide will be described. First, the guide wire 2 is inserted into the insertion hole 5 of the capsule endoscope 3 from the distal side of the guide wire 2 outside the body cavity.

  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 13 from the anus 16, and then the capsule endoscope 3 is inserted into the large intestine 13 using the guide wire 2 as a guide. Next, when the guide wire 2 is pushed toward the deep part of the large intestine 13, the guide wire introducing member 4 at the tip of the guide wire 2 moves forward while sliding on the inner surface of the large intestine 13. Since the guide wire 2 has flexibility and a resin layer is provided on the surface thereof, the guide wire 2 is pushed forward smoothly while being curved following the curved shape of the large intestine 13. When the guide wire introducing member 4 reaches the cecum at the end point, for example, the guide wire introducing member 4 stops pushing the guide wire 2 forward.

  Next, the capsule endoscope 3 is advanced toward the deep part of the large intestine 13 by pushing the capsule endoscope 3 forward by another member or making it self-run with the guide wire 2 inserted into the large intestine 13 as a guide. At this time, as shown in FIG. 4B, the inside of the large intestine 13 is illuminated by the LEDs 15a and 15b provided in the capsule endoscope 3, and the CCD 14 moves forward while observing the inside of the large intestine 13. The video signal obtained by the CCD 14 is transmitted by the transmission circuit 23 to the external reception circuit 24 and can be displayed on the monitor 25.

  Accordingly, the capsule endoscope 3 can observe the inner surface of the capsule endoscope 3 while moving forward in the large intestine 13 and project the lesioned portion or the like on the external monitor 25. And the like can be displayed on the external monitor 25.

  According to the guide wire type capsule endoscope apparatus 1 having the above structure, the capsule endoscope 3 can be inserted into the target site in a short time by adopting a structure in which the capsule endoscope 3 is advanced and retracted along the guide wire 2.

  In addition, since the guide wire 2 is not disposed between the LEDs 15a and 15b and the CCD 14, the guide wire 2 can be prevented from entering the field of view of the CCD 14, and the shadow of the guide wire 2 by the LEDs 15a and 15b can be suppressed in the field of view of the CCD 14. It can also be suppressed. Therefore, the inside of the large intestine 13 can be effectively observed by the CCD 14.

  Furthermore, by arranging the CCD 14 so that the distance between the tangent L and the CCD 14 is the longest, the distance between the CCD 14 and the guide wire 2 is further increased, so that the field of view of the CCD 14 can be more effectively secured.

  In the first embodiment, the LEDs 15a and 15b provided in the capsule endoscope 3 are illuminated and observed by the CCD 14, and the video signal obtained by the CCD 14 is transmitted to the external receiving circuit 24 by the transmitting circuit 23. However, it is also possible to control the LEDs 15a and 15b and the CCD 14 inside the capsule endoscope 3 from an external control circuit.

  5 and 6 show the second embodiment, and the same components as those of the first embodiment are denoted by the same reference numerals and the description thereof is omitted. The capsule endoscope 3 according to the present embodiment includes, for example, one LED 15a. In addition, the capsule endoscope 3 includes a balloon portion 26 and a fluid passage 27 for supplying air to the balloon portion 26 as a fluid for inflating the balloon portion 26, for example. The balloon portion 26 is formed of silicon rubber or the like, and can be expanded and contracted in the radial direction of the capsule endoscope 3. The balloon portion 26 is attached so as to cover substantially the entire side surface of the capsule main body portion 10. For example, both front and rear edges are fixed to the capsule main body portion 10 using an adhesive or the like.

  For example, a plurality of fluid passages 27 are inserted from the rear side of the capsule main body 10 into the inside, and a plurality of fluid passages 27 are opened at positions corresponding to the balloon portion 26 on the side surface of the capsule main body 10. The fluid passage 27 is provided inside the multi-lumen tube 30. Inside the multi-lumen tube 30, a treatment instrument insertion passage 32 for inserting a treatment instrument 31 such as forceps is provided outside the fluid passage 27. For example, the treatment instrument insertion passage 32 opens at a position away from the insertion hole 5 in the protruding portion 20 of the capsule body 10. The opening of the treatment instrument insertion passage 32 is not particularly limited to the protruding portion 20.

  The fluid passage 27 and the treatment instrument insertion passage 32 are separated at the base portion 33 of the multi-lumen tube 30. The base 33 may include a second insertion hole 34 through which the guide wire 2 is inserted. For example, a syringe is provided as an air supply unit 35 on the end side of the fluid passage 27. Thereby, when air is supplied to the balloon part 26 via the fluid passage 27 by the syringe, the balloon part 26 is inflated.

  Next, the operation of the guide wire type capsule endoscope apparatus 1 according to the present embodiment will be described. As shown in FIG. 6, when the capsule endoscope 3 finds a lesion 41 such as a polyp, the balloon 26 is inflated by supplying air to the balloon 26 by a syringe. When the balloon part 26 is inflated, the balloon part 26 is pressed against the inner wall part 40 of the large intestine 13. Thereby, the capsule endoscope 3 is adhered and fixed to the inner wall portion 40 of the large intestine 13. Next, in this state, a treatment such as removing the lesioned part 41 can be performed using the treatment tool 31 such as a loop forceps.

  According to the guide wire capsule endoscope apparatus 1 having the above structure, since the capsule endoscope 3 is closely attached to and fixed to the inner wall portion 40 of the large intestine 13, the capsule endoscope 3 is operated when the treatment instrument 31 is operated. It does not move, the operability can be improved, and the treatment of the lesioned part 41 is easy.

  FIG. 7 shows a modification of the second embodiment. In the present modification, the side surfaces of the capsule body 10 are inflated and deflated independently to the front LED side 42, the front protrusion side 43, the rear LED side 44, and the rear protrusion side 45, respectively. , 52, 53.

  The balloon portions 50, 51, 52, and 53 are respectively provided with fluid passages 54, 55, 60, and 61, and the fluid passages 54, 55, 60, and 61 are provided inside the multi-lumen tube 30. Is provided. The fluid passages 54, 55, 60, 61 are connected to the corresponding syringes (not shown). The balloon portions 50, 51, 52, and 53 are inflated and contracted independently by supplying air with the corresponding syringes.

  Next, the operation of the guidewire capsule endoscope apparatus 1 according to this modification will be described. When the capsule endoscope 3 finds the lesioned part 41, air is supplied to the balloon parts 50, 51, 52, and 53 by each syringe.

  At this time, by controlling the degree of expansion of each of the balloon portions 50, 51, 52, 53, the capsule endoscope 3 is brought into close contact with and fixed to the inner wall portion 40 of the large intestine 13, and the capsule portion 3 is in contact with the lesioned portion 41. The endoscope 3 is placed in a posture in which the treatment tool 31 can be easily operated. For example, as shown in FIG. 7, the balloons 50 and 53 are greatly inflated, and the balloons 51 and 52 are inflated small, so that the capsule endoscope 3 is in a forward tilted posture, and the treatment tool is in contact with the lesioned part 41. It becomes easy to operate 31. Next, in this state, the lesioned part 41 is treated using the treatment tool 31.

  According to the guide wire type capsule endoscope apparatus 1 having the above-described structure, the capsule endoscope 3 can be fixed to the lesioned part 41 in a posture in which the treatment tool 31 can be easily operated. The tool 31 can be operated. Therefore, the treatment of the lesioned part 41 is easy.

  FIG. 8 shows a third 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 type capsule endoscope apparatus 1 according to this embodiment includes a self-propelled mechanism 62 that moves the capsule endoscope 3 forward and backward.

  As shown in FIG. 8B, the self-propelled mechanism 62 includes a pair of rollers 63 and 64 that sandwich the guide wire 2, a motor 65 as a drive source for the rollers 63 and 64, and a power source for the motor 65. For example, a battery 70 and a control unit 66 that controls driving of the motor 65 are provided.

  As shown in FIG. 8A, the capsule body 10 is provided with a recess 71 as an insertion portion along the front-rear direction on the outer side, and the guide wire 2 is inserted into the recess 71. Yes. A substantially flat plane portion 72 is provided on the inner bottom portion of the recess 71. As shown in FIG. 8B, at this time, the recess 71 has, for example, a substantially symmetrical shape with the guide wire 2 interposed therebetween, and the peripheral edge 21 closest to the left and right end portions 73 and 74 of the recess 71 is formed. A straight line connecting both end portions 73 and 74 is defined as a tangent L.

  The rollers 63 and 64 are disposed substantially parallel to the plane portion 72 with the guide wire 2 interposed therebetween. The motor 65 and the battery 70 are respectively provided inside the capsule main body 10, and are fixed to, for example, the side opposite to the rollers 63 and 64 in the plane portion 72.

  The drive shaft 75 of the motor 65 is connected to the rotation center of the roller 63 through, for example, a through hole 80 provided in the flat surface portion 72, and rotationally drives the rollers 63 and 64. The roller 64 is fixed to the flat surface portion 72 by a shaft 67 so as to be rotatable. The control unit 66 is connected to the motor 65 and controls the advance / retreat of the capsule endoscope 3 by using, for example, the operation unit 81 installed outside.

  According to the guide wire type capsule endoscope apparatus 1 having the above structure, when the roller 63 is rotated by driving the motor 65, the roller 63 rolls on the guide wire 2 by the frictional force with the guide wire 2, so that the capsule endoscope The mirror 3 can be self-propelled.

  FIG. 9 shows a modification of the third embodiment, in which both ends 73 and 74 of the capsule body 10 are provided with cover portions 82 and 83 that cover the recess 71. The cover portions 82 and 83 are formed, for example, by corresponding end portions 73 and 74 extending inwardly in parallel to the flat surface portion 72. Further, the outer wall portions 84 and 85 of the cover portions 82 and 83 are formed substantially parallel to the flat surface portion 72.

  According to this modification, since the rollers 63 and 64 do not directly contact the inner wall portion 40 of the large intestine 13, the rollers 63 and 64 can be smoothly rotated. In this case, the tangent line L is a straight line along the outer wall portions 84 and 85 of the cover portions 82 and 83, respectively.

  FIG. 10 shows a modification of the third embodiment, in which a battery 70 is provided outside the capsule endoscope 3 and the battery 70 and the motor 65 are electrically connected by a lead wire 65a. According to this modification, since the battery 70 is not provided in the capsule endoscope 3, the capsule endoscope 3 can be reduced in size accordingly.

  FIG. 11 shows a fourth embodiment, and the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted. In the present embodiment, the guide wire 2 and the insertion hole 5 are engaged via the engaging portion 90. As shown in FIG. 11B, the engaging portion 90 is provided on, for example, the spiral groove 91 provided on the side surface of the guide wire 2 and the inner surface of the insertion hole 5, and the spiral convex portion 92 that is screwed with the spiral groove 91. It consists of and. For this reason, the inner diameter of the insertion hole 5 is set to be approximately the same as the outer diameter of the guide wire 2. As shown in FIG. 11A, the capsule endoscope 3 is incapable of rotating in contact with the inner wall portion 40 of the large intestine 13 and moves in the axial direction of the guide wire 2.

  Therefore, the capsule endoscope 3 is advanced and retracted by gripping and rotating the proximal side of the guide wire 2. That is, the rotational motion of the guide wire 2 is converted into a linear motion, and the capsule endoscope 3 is advanced and retracted in the axial direction of the guide wire 2.

  According to the guide wire type capsule endoscope apparatus 1 having the above structure, the capsule endoscope 3 can be advanced and retracted only by turning the guide wire 2, so that a separate mechanism for advancing and retracting the capsule endoscope 3 is required. Therefore, the configuration can be simplified.

  FIG. 12 shows a modification of the fourth embodiment, in which a spiral protrusion 92 is provided on the side surface of the guide wire 2 and a spiral groove 91 is provided on the inner surface of the insertion hole 5. Even in this modification, the same effect can be obtained.

  As a modification of the fourth embodiment, as shown in FIG. 13, a flexible insertion portion 93, and a distal end configuration portion 94 including an illumination optical system, an observation optical shape, and the like at the distal end portion of the insertion portion 93, For example, in the large intestine endoscope, as shown in FIG. 13B, the insertion portion 93 is provided with, for example, a passage 100 through which the fiber is inserted and an insertion hole 5 through which the guide wire 2 is inserted. The large-intestine endoscope 95 which employs the above-mentioned is given.

  On the side surface of the guide wire 2, for example, a spiral groove 91 is provided. A spiral convex portion 92 that is screwed into the spiral groove 91 is provided on the inner surface of the insertion hole 5. As shown in FIG. 12, the spiral protrusion 92 may be provided on the side surface of the guide wire 2, and the spiral groove 91 may be provided on the inner surface of the insertion hole 5. As a result, the colonoscope 95 is brought into contact with the inner wall portion 40 of the large intestine 13 so that it cannot rotate and can move in the axial direction of the guide wire 2, thereby making the large intestine endoscope 95 the inner wall portion 40 of the large intestine 13. You can move forward and backward. According to this modification, the colonoscope 95 can be advanced and retracted simply by grasping and rotating the proximal side of the guide wire 2.

  In the present invention, the CCD 14, the LEDs 15 a and 15 b, and the insertion hole 5 are provided toward the distal end side along the guide wire 2. For example, they are provided toward the distal end side along the guide wire 2. May be. In this case, when the inside of the large intestine 13 is observed while the capsule endoscope 3 is retracted, good observation can be performed in the retracting direction.

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

  (Appendix 1) An observation optical system for inserting a capsule endoscope into a lumen using a flexible guide wire as a guide, and observing the inside of the lumen at an end portion in the advancing direction of the capsule endoscope, and the tube A guide wire type capsule endoscope apparatus comprising an illumination optical system for illuminating the inside of a cavity and an insertion portion for inserting the guide wire, wherein the observation optical system is at an end portion in the advancing direction of the capsule endoscope And the illumination optical system is provided at a position away from the tangent of the outer peripheral surface at the end portion in the traveling direction closest to the insertion portion than the longest distance between the tangent and the insertion portion. A guide wire type capsule endoscope apparatus.

  (Supplementary note 2) The guide wire capsule endoscope apparatus according to supplementary note 1, wherein the observation optical system is provided farther than the illumination optical system with respect to the tangent line.

  (Supplementary note 3) In the supplementary note 1, further, an inflatable and contractible balloon portion provided on a side outer peripheral portion of the capsule endoscope, a fluid passage for inflating the balloon portion, the fluid passage communicating with the fluid passage, and A guide wire type capsule endoscope apparatus comprising: a fluid supply unit configured to supply the fluid to the balloon unit.

  (Supplementary note 4) The guide wire capsule endoscope apparatus according to supplementary note 3, wherein the fluid passage is provided in a multi-lumen tube together with a passage through which a treatment instrument is inserted.

  (Supplementary note 5) The guide wire capsule endoscope apparatus according to supplementary note 3, wherein a plurality of independent balloon portions are provided on an outer peripheral portion of a side surface of the capsule endoscope.

  (Supplementary note 6) The guidewire capsule endoscope apparatus according to supplementary note 1, further comprising a self-propelled mechanism in the capsule endoscope.

  (Supplementary note 7) The supplementary note 6, wherein the self-propelled mechanism includes a pair of rollers that sandwich the guide wire, a drive unit that drives the roller, and a power source that drives the drive unit. Guide wire type capsule endoscope apparatus.

  (Additional remark 8) The said insertion part is a recessed part provided in the outer side part of the said capsule endoscope over the front-back direction, Comprising: The said roller is provided in this recessed part, The guide wire of Additional remark 7 characterized by the above-mentioned. Type capsule endoscope device.

  (Supplementary note 9) The guide wire capsule endoscope apparatus according to supplementary note 8, wherein the concave portion is provided with a cover portion that covers the roller.

  (Additional remark 10) The guide wire type capsule endoscope apparatus according to additional remark 7, wherein the power source is provided inside the capsule endoscope.

  (Supplementary note 11) The guide wire capsule endoscope apparatus according to supplementary note 7, wherein the power source is provided outside the capsule endoscope.

  (Additional remark 12) The said guide wire and the said insertion part are provided with the engaging part screwed together, and the said capsule endoscope is advanced and retracted by rotating the said guide wire. The guide wire type capsule endoscope apparatus according to 1.

  (Additional remark 13) The said engaging part is provided with the helical groove part provided in the outer periphery of the said guide wire, and the helical convex part which is provided in the said insertion part and is screwed together in the said helical groove part, The additional remark 12 characterized by the above-mentioned. Guide wire type capsule endoscope apparatus.

  (Additional remark 14) The said engaging part is provided with the spiral convex part provided in the outer periphery of the said guide wire, and the spiral groove part which is provided in the said insertion part and screwed together in the said spiral convex part. The capsule endoscope apparatus 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 the component covering different embodiment suitably.

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 perspective view, (b) is a longitudinal side view, (c) is a front view. The same embodiment is shown, (a) And (b) is operation | movement explanatory drawing of a capsule endoscope apparatus. The perspective view of the capsule endoscope which shows 2nd Embodiment of this invention. Operation | movement explanatory drawing of the embodiment. Operation | movement explanatory drawing of the modification of the embodiment. The 3rd Embodiment of this invention is shown, (a) is a recessed part side view of a capsule endoscope, (b) is sectional drawing which follows the AA line in (a). Sectional drawing which shows the modification of the embodiment. The side view which shows the modification of the embodiment and cuts and shows a part of capsule endoscope. The 4th Embodiment of this invention is shown, (a) is a side view of a capsule endoscope, (b) is sectional drawing which follows the BB line in (a). Sectional drawing which shows the modification of the embodiment and follows the axial direction of an insertion hole. The modification of the embodiment is shown, (a) is a schematic configuration diagram of a large intestine endoscope apparatus. (B) is sectional drawing which follows the CC line in (a).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Guide wire type capsule endoscope apparatus, 2 ... Guide wire, 3 ... Capsule endoscope, 5 ... Insertion hole (insertion part), 14 ... CCD (observation optical system), 15a, 15b ... LED (illumination optical system) ), 71... Recessed portion (insertion portion), L.

Claims (1)

A capsule endoscope is inserted into the lumen using a flexible guide wire as a guide, and an observation optical system for observing the inside of the lumen at the end in the advancing direction of the capsule endoscope, and illuminating the inside of the lumen A guide wire-type capsule endoscope device comprising an illumination optical system that performs the above-described illumination, and an insertion portion through which the guide wire is inserted.
The observation optical system and the illumination optical system at an end portion in the advancing direction of the capsule endoscope with respect to the tangent line of the outer peripheral surface at the end portion in the advancing direction closest to the insertion portion, the tangent line and the insertion portion A guide wire type capsule endoscope apparatus, characterized in that the guide wire type capsule endoscope apparatus is provided at a position separated from the longest interval between the two.

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