WO2005058158A1 - カプセル医療装置 - Google Patents
カプセル医療装置 Download PDFInfo
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- WO2005058158A1 WO2005058158A1 PCT/JP2004/018795 JP2004018795W WO2005058158A1 WO 2005058158 A1 WO2005058158 A1 WO 2005058158A1 JP 2004018795 W JP2004018795 W JP 2004018795W WO 2005058158 A1 WO2005058158 A1 WO 2005058158A1
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- Prior art keywords
- medical device
- capsule medical
- sensor
- unit
- chemical sensor
- Prior art date
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/04—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances
- A61B1/041—Capsule endoscopes for imaging
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
- A61B5/0082—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence adapted for particular medical purposes
- A61B5/0084—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence adapted for particular medical purposes for introduction into the body, e.g. by catheters
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/07—Endoradiosondes
- A61B5/073—Intestinal transmitters
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
- A61B5/14539—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue for measuring pH
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
- A61B5/14546—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue for measuring analytes not otherwise provided for, e.g. ions, cytochromes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00002—Operational features of endoscopes
- A61B1/00011—Operational features of endoscopes characterised by signal transmission
- A61B1/00016—Operational features of endoscopes characterised by signal transmission using wireless means
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00002—Operational features of endoscopes
- A61B1/00025—Operational features of endoscopes characterised by power management
- A61B1/00036—Means for power saving, e.g. sleeping mode
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/04—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances
- A61B1/05—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances characterised by the image sensor, e.g. camera, being in the distal end portion
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
- A61B2562/24—Hygienic packaging for medical sensors; Maintaining apparatus for sensor hygiene
- A61B2562/245—Means for cleaning the sensor in-situ or during use, e.g. hygienic wipes
Definitions
- the present invention relates to a capsule medical device having a built-in chemical sensor for detecting a body fluid or the like in a body.
- Japanese Patent Application Laid-Open No. 5-200015 discloses a capsule-type device that absorbs a body fluid in a living body cavity and tests the sucked body fluid.
- This prior example is equipped with a blood sensor for detecting blood.
- the present invention has been made in view of the above points, and an object of the present invention is to provide a capsule medical device capable of performing continuous sensing, for example, by preventing deterioration of characteristics in a body.
- the present invention provides a capsule medical device equipped with a chemical sensor used for sensing, comprising:
- a chemical sensor provided in the capsule-shaped housing,
- FIG. 1 is a view showing a configuration of a force-pussel type medical system including a first embodiment of the present invention by use examples.
- FIG. 2A is a perspective view showing a configuration of a capsule medical device.
- FIG. 2B is a view showing a position where a chemical sensor is provided in the capsule medical device.
- FIG. 2C is a longitudinal sectional view showing the internal configuration of the capsule medical device.
- FIG. 3 is a diagram schematically showing an internal configuration of a capsule medical device of a first modification.
- FIG. 4 is a diagram schematically showing an internal configuration of a capsule medical device according to a second modification.
- FIG. 5 is a flowchart showing the operation content of the second modification.
- FIG. 6 is a plan view showing a capsule medical device of a third modification.
- FIG. 7 is a view schematically showing the internal configuration of a capsule medical device according to a fourth modification.
- FIG. 8 is a diagram schematically showing the internal configuration of a capsule medical device according to the second embodiment of the present invention.
- FIG. 9 is a view schematically showing an internal configuration of a capsule medical device of a first modification.
- FIG. 10 is a diagram schematically showing the internal configuration of a capsule medical device according to a third embodiment of the present invention.
- FIG. 11 is a flowchart showing the operation contents of Embodiment 3.
- FIG. 12A is a longitudinal sectional view showing the internal configuration of a capsule medical device according to a first modification.
- FIG. 12B is an explanatory view showing a usage example.
- FIG. 13A is a view schematically showing an internal configuration of a capsule medical device according to a second modification.
- FIG. 13B is a view schematically showing the internal configuration of a capsule medical device according to a third modification.
- Garden 13C is a diagram showing a data format transmitted by the capsule medical device of the third modification.
- FIG. 14 is a diagram showing a capsule medical system including a fourth embodiment of the present invention.
- FIG. 15 is a perspective view showing an appearance of a capsule medical device according to Embodiment 4 of the present invention.
- FIG. 16A is a longitudinal sectional view showing the internal structure of the capsule medical device.
- FIG. 16B is a sectional view taken along line AA of FIG. 16A.
- FIG. 16C is a sectional view showing the structure of the sensor.
- FIG. 16D is a diagram showing an example of a drive signal of a motor.
- FIG. 17 is a configuration diagram showing an analysis device in a modification.
- FIG. 18A is a plan view showing a configuration of a capsule medical device according to a fifth embodiment of the present invention.
- FIG. 18B is a sectional view taken along the line BB of FIG. 18A.
- FIG. 19A is a plan view showing a configuration of a capsule medical device according to Example 6 of the present invention.
- FIG. 19B is a longitudinal sectional view showing the internal configuration of the capsule medical device of the sixth embodiment.
- FIG. 20 is a longitudinal sectional view showing a configuration of a capsule medical device according to a seventh embodiment of the present invention.
- FIG. 21 is a cross-sectional view showing a configuration of a capsule medical device according to Example 8 of the present invention.
- FIG. 22 is a cross-sectional view showing a configuration of a capsule medical device according to Embodiment 9 of the present invention.
- FIG. 23 is a longitudinal sectional view showing a configuration of a capsule medical device according to Embodiment 10 of the present invention.
- FIG. 24A is a diagram showing a configuration of a capsule medical device according to an eleventh embodiment of the present invention.
- FIG. 24B is a diagram showing a configuration of an analyzer for performing analysis by mounting the capsule medical device of the eleventh embodiment of the present invention.
- FIG. 2A shows an external view of the capsule medical device
- Fig. 2B schematically shows that chemical sensors are provided at four locations on the outer peripheral surface of the capsule medical device
- Fig. 2C shows the inside of the capsule medical device. It is sectional drawing which shows a structure.
- a capsule medical system 1 is composed of a capsule medical device 3 having a built-in chemical sensor that is swallowed by a patient 2 to detect the presence or absence of a tumor or bleeding in the body.
- An external device 4 receives information transmitted by radio waves from the medical device 3 via the antenna 6 and stores the information.
- the chemical sensors 13a to 13d are provided at, for example, four locations on the cylindrical outer peripheral surface of the outer case.
- the sensor surface serving as the surface (upper surface) is exposed at the opening 12i. It enables detection (sensing) of test objects such as blood, tumors, tumor markers, proteins, sugars, lipids, enzymes, drugs, genes, and immunity, which are mixed in.
- Each of the chemical sensors 13i is a sensor whose electrical characteristics or optical characteristics change when body fluid or the like adheres to the sensor surface.
- a square having an electrode array in which several tens to several thousands of gold electrodes of about ⁇ 40 microns are arranged as a sensor surface. It has a substrate on which a plate-shaped sensor is provided and on the bottom side of which a number of terminals are provided for external connection.
- a sensor surface reproducing means for reproducing the same sensor surface or a sensor surface switching means for switching the sensor surface is provided so that sensing can be performed continuously.
- the chemical sensor 13i is connected to the detection circuit 14, by performing signal processing for more chemical sensor 1 3i output signal of the detection circuit 14, detected more chemical sensor 1 3i
- the presence or absence of the inspection object and the amount of the object, if any, can be detected (sensing) from the possible changes in the output signal.
- the output signal of the detection circuit 14 is sent to a control circuit 15, which controls the operation of the detection circuit 14 and performs signal processing such as A / D conversion on the output signal of the detection circuit 14 to perform wireless processing. Send to circuit 16.
- the wireless circuit 16 modulates sensing information detected by the chemical sensor 13i (and the detection circuit 14) input from the control circuit 15 and transmits the modulated information to the outside of the body by an electric wave via an antenna (coil) 17. .
- the radio wave is received by the extracorporeal device 4 arranged outside the body, and the sensing information detected by the chemical sensor 13i or the like is stored in the storage device inside the extracorporeal device 4. That is, as shown in FIG. 1, the patient 2 swallows the capsule medical device 3 and wirelessly transmits sensing information detected using the chemical sensor 13i, and the extracorporeal device 4 transmits the sensing information to the antenna.
- the reception is demodulated by an internal wireless circuit by 6 and stored in a storage device such as a semiconductor memory (not shown) together with the demodulated sensing information along with a reception time.
- the object to be detected in the body is ( Cuff for a long time (about 5-8 hours) before this capsule medical device 3 is excreted outside the body.
- a heater 18i for heating is provided on the back surface (back surface) of the chemical sensor 13i.
- Each heater 18i is connected to a heater circuit 19, and each heater 18i performs an operation of heating the chemical sensor 13i and drying the sensor surface by supplying a drive signal (drive power) from the heater circuit 19. .
- a battery 20 is provided in the capsule medical device 3, and supplies power for operation to the heater circuit 19, the detection circuit 14, the control circuit 15, and the wireless circuit 16.
- the chemical sensor 13i since the chemical sensor 13i is constantly exposed to the body fluid, unnecessary substances such as the body fluid and mucous membrane in the previous state adhere to or stagnate on the sensor surface, and the detection characteristics in the initial state may be reduced. Since there is a possibility that the detection characteristics may be degraded due to the deviation, the heater 18i heats the sensor surface to form a regeneration means to return each chemical sensor 13i to almost the initial state. I have.
- the chemical sensor 13i since the surface of the chemical sensor 13i is constantly exposed to body fluids, mucous membranes and the like may adhere. For this reason, the chemical sensor 13i may not function in the same manner as the initial state due to adhesion of mucous membranes or the like.However, the heater 18 provided on the back of the chemical sensor 13i periodically heats the chemical sensor 13i. In addition, the sensor surface of the chemical sensor 13i is dried to remove unnecessary substances adhered thereto, and a regeneration process for regenerating the sensor surface of the chemical sensor 13i is performed.
- the control circuit 15 controls the heating by the heater 18i via the heater circuit 19 so that the heating is periodically performed.
- the capsule medical device 3 constantly processes the output from the chemical sensor 13i by the detection circuit 14 to obtain sensing information, and obtains the wireless information 16 and the antenna 17 And transmitted outside the body by radio waves. And to the extracorporeal device 4 In this case, the time when radio waves are received by the antenna 6 and the sensing detection signal detected by the chemical sensor 13i and the detection circuit 14 by the internal demodulation circuit is received in the internal storage device such as the nonvolatile semiconductor memory. Is stored together with the information.
- the capsule medical device 3 exists in the body for about 512 hours from swallowing to excretion outside the body, and is sequentially excreted through the digestive tract such as the esophagus, stomach, small intestine, and large intestine, and excreted by anal force.
- the sensor surface serving as the detection surface of the chemical sensor 13i of the capsule medical device 3 is constantly exposed to body fluids, so that unnecessary substances such as mucous membranes may adhere.
- the back surface (bottom surface) of the chemical sensor 13i is periodically heated by the heater 18i. Then, the sensor surface of the chemical sensor 13i is dried, or unnecessary substances adhering to the sensor surface are removed or burned. As a result, the chemical sensor 13i has its sensor surface regenerated to the substantially initial state, and has the detection characteristics of the initial state.
- the chemical sensor 13i is periodically reset and regenerated, it is possible to continuously perform sensing in the body without deteriorating the detection performance.
- the chemical sensor 13i is periodically regenerated by heating, so that the sensing can be used continuously.
- the chemical sensor 13i enables sensing to be used substantially continuously or a plurality of times.
- sensing data with little deterioration in detection characteristics can be obtained, and thus accurate diagnosis can be performed.
- FIG. 3 shows a capsule medical device 3B according to a first modification.
- This capsule medical device 3B is different from the capsule medical device 3B in FIG. 2C in that a vibrating element 21i composed of a piezo element or the like is attached to the back of the heater 18i, for example.
- a heater & vibrating element driving circuit 22 for driving the heater 18i and the vibrating element 21i is employed.
- the control circuit 15 controls the heater & vibrating element driving circuit 22. it result, the drying chemical sensor 13i by the operation of the heater 18i, play a chemical sensor 13i to remove by vibrating the vibrating element 21i deposits adhered to a chemical sensor 1 3i or initial It can be set to the state.
- the vibrating element 21i Under the control of the control circuit 15, the vibrating element 21i receives a drive signal of an alternating current (or a vibration waveform such as a rectangular wave or a triangular wave) from the heater & vibrating element driving circuit 22, and the chemical sensor 13i Vibrates in a direction parallel to the sensor surface.
- the driving of the heater 18i and the driving of the vibrating element 21i may be performed simultaneously.However, for example, the heater 18i is driven to dry the sensor surface.
- the vibrating element 21i is driven after the above, even if an unnecessary substance due to drying or burning remains on the sensor surface, it can be efficiently removed by vibration.
- Other configurations are the same as those of the first embodiment.
- FIG. 4 shows a capsule medical device 3C according to a second modification.
- the opening 12i can be opened and closed by moving the capsule medical device 3C in the longitudinal direction as shown by an arrow in FIG. 4 by a moving mechanism (lid opening and closing mechanism) 32.
- the chemical sensor 13i is arranged so that the sensor surface thereof faces the upper surface (facing the opening 12a) via a cleaning space 33 provided inside the lid 31.
- a heater 18i is attached to the back of the chemical sensor 13i as in the case of FIG. 2C.
- a cleaning liquid tank 34 containing a cleaning liquid is provided, and the cleaning liquid tank 34 is connected via two tubes 35 for circulating the cleaning liquid. In the meantime, it is connected to the washing space 33, and a liquid feeding or suction pump 36 is interposed in the middle of one tube 35.
- the drive of the pump 35 is controlled by the control circuit 15.
- the control circuit 15 also controls the operation of the lid moving mechanism 32.
- FIG. 4 Other configurations are the same as those of the capsule medical device 3B in FIG. 2C.
- FIG. 4 for simplicity, one chemical sensor 13a is shown for simplicity.
- a similar configuration may be provided in a portion where is disposed.
- the reproduction process may be performed at an appropriate time interval, which is not limited to a regular one (at a fixed time interval).
- step S1 the control circuit 15 sends a control signal to the lid moving mechanism 32, moves the lid 31 by the lid moving mechanism 32, and opens the lid 31 that has closed the opening 12a. . Then, by opening the lid 31, the sensor surface of the chemical sensor 13a is exposed to the opening 12a, and sensing is performed by the chemical sensor 13a as shown in step S2. Sensing data detected by the chemical sensor 13a and subjected to sensing of the detection target through the detection circuit 14 is transmitted from the antenna 17 as shown in step S3, received by the external device 4, and stored in the external device 4. It is memorized.
- step S4 the control circuit 15 determines whether a predetermined time has elapsed since the start of sensing, and returns to step S2 if the predetermined time has not elapsed. On the other hand, when the predetermined time has elapsed, as shown in step S5, the control circuit 15 performs a reproduction process as follows.
- control circuit 15 stops sensing by the chemical sensor 13a that has performed sensing for a predetermined time, and drives the lid moving mechanism 32 to move the lid 12 through the opening 12a facing the chemical sensor 12a.
- step S6 the control circuit 15 drives the pump 36 to flow (send) the cleaning liquid to the cleaning space 33 facing the sensor surface, thereby cleaning the sensor surface.
- the control circuit 15 drives the pump 36 to flow (send) the cleaning liquid to the cleaning space 33 facing the sensor surface, thereby cleaning the sensor surface.
- control circuit 15 drives the heater 18a via the heater circuit 19 to heat the chemical sensor 13a and dry the sensor surface. Then, the reproduction processing ends.
- control circuit 15 opens the lid 31 covering the sensor surface of the regenerated chemical sensor 13a via the lid moving mechanism 32.
- sensing is performed by the danigami sensor 13a.
- the regenerating process is returned to the initial state, and the chemical sensor 13a regenerated to a clean state is used. Sensing can be performed repeatedly.
- the chemical sensor 13i is cleaned with the cleaning liquid, so that the sensor surface can be more reliably regenerated in a clean state.
- a simplified configuration may be adopted by omitting the lid 31.
- the second modification is a configuration applied to the first embodiment, but may be applied to the first modification.
- the lid 31 and the lid moving mechanism 32 may be provided as described above. In other words, when performing the regenerating process, closing the opening 12i of the chemical sensor 13i performing the regenerating process with the lid 31 can dry the chemical sensor 13i more efficiently, and further vibrates the chemical sensor 13i by the vibrating element 21i. By doing so, unnecessary substances can be efficiently removed.
- FIG. 6 shows a capsule medical device 3D according to a third modification.
- this modification for example, in the capsule medical device 3C in FIG. 4, two chemical sensors are arranged adjacent to each other, and the lids 31 are alternately opened.
- the lid 31 functions as a sensor surface switching unit.
- the openings 12a and 12b are formed adjacent to the capsule medical device 3D in the circumferential direction, and a lid 31 is disposed inside the opening, and the lid 31 is moved not shown in FIG.
- the mechanism 32 makes it possible to move in the circumferential direction.
- the playback process is performed on the side.
- the other is Sensing can be performed by the element 13j.
- one chemical sensor 13a may be provided so as to cover the openings 12a and 12b.
- FIG. 7 shows a capsule medical device 3E according to a fourth modification. This capsule medical device 3E
- the gastrointestinal fluid in the body is used for washing without using the built-in washing solution.
- the capsule medical device 3E is different from the capsule medical device 3C in FIG.
- the filter 38 communicates with the outside of the outer case 11 via the filter 38. This end serves as a liquid suction port 35a.
- the other end of the tube 35 is also not connected to the cleaning liquid tank 34 but communicates with the outside of the outer case 11. This end serves as a drain port 35b.
- Other configurations are the same as those of the capsule medical device 3C in FIG.
- a body fluid is sucked from a liquid suction port 35a by a pump 36, filtered by a filter 38 to obtain a clean cleaning liquid, and a cleaning space 33 provided on the sensor surface is provided. And drain the liquid used for washing out of the capsule medical device 3E from the drain port 35b.
- the cleaning function functions almost the same as when the cleaning liquid is incorporated as shown in FIG.
- the same operation and effect as in the case of FIG. 4 can be obtained, and it is not necessary to store the cleaning liquid in the capsule medical device 3E. Since it is not necessary to store the liquid inside, the cost can be reduced.
- the detection output of the chemical sensor 13i being washed with the body fluid passed through the filter 38 can be used as a reference to correct the output of the chemical sensor 13i for each part to be sensed. By doing so, it is possible to perform more accurate detection.
- FIG. 8 shows a capsule medical device 3F according to the second embodiment of the present invention.
- This embodiment is different from the embodiment 1 in that an optical chemical sensor for detecting an optical characteristic component such as a body fluid is mounted.
- the capsule medical device 3F of the embodiment 2 shown in FIG. A transparent glass tube 41 is disposed so as to cross the tube 11, and a liquid sending or suction pump 42 is interposed in the middle of the tube 41 to suck body fluid from one open end and drain it from the other open end. Liquid. That is, one open end of the glass tube 41 serves as a liquid suction port, and the other open end serves as a liquid discharge port 41b.
- a filter 43 is provided at an opening end serving as a liquid suction port, so that solid matter does not flow into the glass tube 41.
- an optical window portion 44 narrowed so as to be a thin and flat conduit for optical detection is provided.
- a light detection element 45 is arranged to face the light detection element 45, and the light emitting element 46a can be arranged to face the light detection element 45 with the optical window 44 interposed therebetween, thereby forming an (optical) detection section 47.
- the light-emitting element 46a is composed of a blue light-emitting element such as a blue LED or a blue laser diode, which emits blue light having a wavelength around 415 nm, at which hemoglobin in blood exhibits specific absorption characteristics. Is irradiated to the optical window 44 side, and the light amount is detected by the light detecting element 45 through the body fluid in the glass tube 41 of the optical window 44 and the optical window 44.
- the light detection area is increased and the optical path length in each section is made substantially uniform. That is, the optical path length in the optical detection unit 47 is optimized.
- the detection signal is input to the detection circuit 48 by the light detection element 45.
- the detection circuit 48 compares the signal with a reference level corresponding to a normal transmission intensity when hemoglobin is not included, amplifies the difference signal, and sends the signal to the control circuit 15.
- the output of the detection circuit 48 is a detection signal corresponding to whether or not hemoglobin is contained, or when hemoglobin is contained, corresponding to the amount of hemoglobin.
- the detection unit 47 is reproduced or returned to the initial state as described below. Form the means to be used.
- a light emitting element 46b composed of an ultraviolet LED or an ultraviolet LD that emits ultraviolet light is arranged adjacent to the light emitting element 46a. Specifically, the light emitting element 46b adjacent to the light emitting element 46a is attached to the moving mechanism 49 so that the light emitting element 46b can be set to move near the optical window 44 forming the detecting section 47.
- a photocatalyst film (or photocatalyst coating portion) 50 is formed on the inner surface of the optical window 44.
- the photocatalyst film 50 is activated by ultraviolet irradiation and has a function of removing dirt attached to the inner surface of the glass tube 41 and a function of making dirt less likely to adhere.
- the light emitting element 46a when sensing is performed for a predetermined time by the light emitting element 46a, the light is moved by the moving mechanism 49 under the control of the control circuit 15, and the glass tube 41 near the detecting section 47 is irradiated with ultraviolet light by the light emitting element 46b, and the photocatalyst is irradiated.
- the inner surface of the glass tube 41 near the detection unit 47 is returned to a clean state by the film 50.
- the moving mechanism 49 may be omitted, and the light emitting element 46b may emit light on the spot. In this case, the structure becomes simple.
- the inside of the glass tube 41 forming the detecting section 47 can be cleaned using a photocatalyst, the detection performance does not deteriorate.
- a light emitting element having the function of the light emitting element 46a in place of the light emitting element 46a and emitting light at a wavelength at which hemoglobin does not have a specific absorption characteristic is included in one light emitting element.
- the formed multi-light emitting element is adopted, and the transmitted light when the light emitting element emits blue light and the other light emitting element emits light are detected by the light detecting element 45, and the transmitted light when the other light emitting element is emitted.
- the detection of hemoglobin in blood that is, blood detection, may be performed based on the amount of attenuation of the intensity of transmitted light rather than the value.
- the component may be detected by utilizing the optical characteristics of the body fluid component other than hemoglobin.
- the light emitting elements 46a and 46b may be formed by a multi light emitting element. By doing so, the moving mechanism 49 can be dispensed with and the size can be further reduced. Further, a method of irradiating the living body with light that is different from the method of detecting transmitted light as in this embodiment and detecting reflected light or scattered light returning from the body fluid or the inner cavity wall surface may be used.
- FIG. 9 shows a capsule medical device 3G according to a first modification.
- the capsule medical device 3G has a function of detecting hemoglobin in blood in the capsule medical device 3F shown in FIG. 8, but is capable of detecting other components.
- a reagent accommodating section 51 containing a reagent that reacts with the test object in the body fluid to color is incorporated therein, and is connected to a glass tube 41 via a conduit 52.
- a pump 53 is provided in the middle of the pipe 52, and the drive of the pump 53 is controlled by the control circuit 15 so that the reagent can be supplied to the glass tube 41 side to mix (drop) the reagent in the body fluid.
- the reagent By dropping the reagent into the body fluid, it reacts with proteins, sugars, lipids, enzymes, drugs, immunity, genes, etc., which are mixed in the body fluid, and converts it into a dye, which is then converted.
- the amount or concentration of the test object is detected using the absorption by the dye.
- a white LED 46c that emits white light is attached to the moving mechanism 49. Others are the same as FIG.
- the operation of the light emitting elements 46a and 46b is the same as that of the seventh embodiment, and when detecting another inspection object, the white LED 46c faces the optical window 44.
- the control circuit 15 controls the moving mechanism 49. Then, the white LED 46c emits light, and the light detection element 45 detects the amount of transmitted light through the optical window 44 to detect the amount or concentration of the inspection object.
- MPC polymer coating is performed on the inner surface of the glass tube 41 other than the detection unit 47.
- MPC polymer coating is a coating that prevents protein adhesion. Less stain prevention effect, but no need for UV irradiation.
- MPC polymer is an abbreviation for 2-methacryloyloxetyl.
- phosphorylcholine polymer which is an acrylic-based polymer in which part of the polymer structure is replaced with the exact same structure as the phospholipids that make up the biological membrane.
- the glass tube 41 that performs optical detection can be easily kept clean.
- FIG. 10 shows a forceps medical device 3H according to the third embodiment of the present invention.
- the capsule medical device 3C of the second embodiment in FIG. 4 there is a possibility that it is determined that the detection target is detected by the chemical sensor 13i, and the position is precisely detected later.
- a marking function for placing a marker on the detection site according to the detection result is provided.
- the capsule medical device 3H has a storage tank 62 for a marking agent 61 in the capsule medical device 3C, and a small nozzle 63 provided in the storage tank 62 is opened to the outside of the outer case 11. .
- a piezo element 64 is attached to the storage tank 62 on the side facing the nozzle 63, and the piezo element 64 is driven by the control circuit 15, so that, for example, the inside of the storage tank 62 is inkjet-type.
- the marking agent 61 is ejected (or ejected) from the nozzle 63, and a small mass of the ejected marking agent 61 is placed in the vicinity of the area detected by the chemical sensor 13a (at a level higher than the normal state).
- a marking mechanism 65 that can be attached to the inner wall of the vehicle for marking.
- a staining solution such as a black marker for the digestive tract (such as SPOT manufactured by GISupply of the United States) is simple, but a bioadhesive polymer or a magnetic material may be used, or another marker may be used. Bioadhesive polymers have the property of adhering to cells in the gastrointestinal tract, so if this polymer is colored, it can be used as a marker. Further, since the marking agent is ejected, a minute needle may be drawn out of the capsule medical device so as to inject the marking agent into the tissue.
- the wireless circuit 16 also has a function of receiving data by using only the transmitting function, and sends a received signal to the control circuit 15. The control circuit 15 controls the marking mechanism 65 based on a signal input from the wireless circuit 16.
- the capsule medical device 3H is sent into the digestive tract in the body cavity.
- step S11 the detection (sensing) of the object is performed by the chemical sensor 13i and the detection circuit 14 incorporated in the capsule medical device 3H as described in FIG.
- the output (sensing data) is transmitted outside the body by radio waves.
- the extracorporeal device 4 (CPU, not shown) detects the level of the received sensor output. Then, as shown in step S13, it is determined whether the detected level is equal to or higher than a predetermined level exceeding a normal range.
- the process returns to step S12.
- the external device 4 CPU
- the external device 4 outputs a marking instruction signal to the capsule medical device 3H as shown in step S14. Send to.
- the control circuit 15 controls the marking mechanism 65 to drive.
- the control circuit 15 drives the piezo element 64 to cause the marking agent 61 to be discharged from the nozzle 63 as described above, thereby marking a part to be inspected (marking). Then, the process returns to step S11, and the same processing is performed for the next sensor output.
- the sensing data is transmitted outside the body, and the marking instruction signal is generated on the external device 4 side.
- the detected level is equal to or higher than the predetermined level. Whether or not the force is determined by the control circuit 15 in the capsule medical device 3H may be controlled so that the marking mechanism 65 is driven based on the determination result.
- FIG. 12A shows a capsule medical device 31 according to a first modification. This modification differs from the case of FIG. 10 in the marking mechanism.
- a bioadhesive polymer 72 and an RF-ID tag 73 that transmits by radio frequency (RF) including ID information are mixed and stored in a storage tank 71.
- the RF-ID tag 73 is formed of a minute tag (for example, a 0.4 mm square Hitachi ⁇ chip or the like) and is formed.
- the movable piece 75 driven by the linear actuator 74 is fitted into the storage tank 71, and the movable piece 75 is moved to discharge the built-in object in the storage tank 71 from the nozzle 76 to the outside for marking.
- the marking mechanism 77 is formed.
- FIG. 12B shows a usage example of the present modification.
- FIG. 12B shows a state in which the capsule medical device 31 is used, for example, in the intestine 78. If a blood-emitting portion 79 is present in the intestine 78 as shown by cross-hatching, the chemical sensor 13a or the like uses the same. Detected at high levels around the site. Then, as described with reference to FIG. 11, the marking mechanism 77 is driven, and the bioadhesive polymer 72 and the RF-ID tag 73 are ejected from the nosepiece 76 and adhered and fixed to the inner wall near the bleeding part 79.
- the position of the marking can be easily confirmed by the radio wave detection. It is used when performing surgery or later when administering medication with another capsule medical device.
- the detection location can be specified more reliably.
- FIG. 13A shows a capsule medical device 3J according to a second modification.
- a force S that employs a small RF-ID tag 73 is used.
- a tubular IC tag 81 is employed. This IC tag 81 is slightly larger in size than the small RF-ID tag 73. , The reliability of detection from outside the body is increased. Alternatively, position detection can be performed with high accuracy.
- the tubular IC tag 81 has a built-in IC and antenna coil in a resin or glass tube.
- a bioadhesive polymer 72 is housed in an IC tag housing section 82 provided in the capsule medical device 3J together with a tubular IC tag 81, and is driven by a linear actuator 74 as in the case of FIG. 12A.
- a solenoid 84 is provided on the IC tag storage section 82 on the side opposite to the nozzle 83, and when the solenoid 84 is driven by the control circuit 15, the movable piece of the solenoid 84 protrudes and moves to form a tube.
- the IC tag 81 is extruded, and the IC tag 81 almost covered with the bioadhesive polymer 72 can be discharged from the nozzle 83.
- the force S can be discharged and fixed to the digestive tract wall 86 within the digestive tract wall 86.
- the antenna can be made larger than the ⁇ chip described above. Larger antennas can lower radio frequencies. If the radio frequency can be lowered, there are advantages such as lower energy consumption and easier transmission through living organisms.
- the detection location can be specified more reliably.
- an illuminating unit and an imaging unit for obtaining an in-vivo image may be provided.
- the illumination means and the imaging means in this manner, chemical sensing and acquisition of an in-vivo image can be performed simultaneously (or in parallel), and more reliable diagnosis can be performed.
- the capsule medical device 3 # of the third modification shown in Fig. 13B is the capsule medical device of Fig. 13A.
- one end in the longitudinal direction of the outer case 11 is sealed by a hemispherical transparent power bar 91.
- a lens frame 93 to which an objective lens 92 is attached is arranged near the center of the inside of the transparent cover 91, and a CMOS imager 94, for example, as an image pickup means is arranged at an image forming position of the objective lens 92.
- a light emitting diode (abbreviated as LED) 95 forming illumination means is attached to an LED substrate 96 on which a driving circuit of the LED 95 is mounted.
- the LED substrate 96 is provided on the back of the CMOS imager 94 via the printed circuit board 97, and drives the CMOS imager 94 and performs signal processing on an imaged image signal. It is connected to the.
- the signal processing circuit board 98 and the like are supplied with power required for operation from the battery 20.
- the signal processing circuit board 98 is electrically connected to the control circuit 15 and the wireless circuit 16.
- the LED 95 and the CMOS imager 94 emit light (illuminate) and capture an image at a predetermined cycle. Further, the control circuit 15 associates the sensing data from the chemical sensor 13a with the image data captured by the CMOS imager 94 and transmits the data from the antenna 17 to the extracorporeal device. For example, as shown in FIG. 13C, the control circuit 15 controls so as to simultaneously transmit the image data Dg and the latest sensing data Dc obtained at the timing when the image data Dg is obtained. Or you may control so that sensing and acquisition of an image may be performed simultaneously.
- the extracorporeal device 4 When receiving the image data Dg and the sensing data Dc transmitted from the capsule medical device 3K, the extracorporeal device 4 stores them in association with the storage device inside the extracorporeal device 4 and adds the reception time.
- the imaging control means for controlling the in-vivo image acquiring means is provided, and the sensing by the chemical sensor 13a and the image acquisition can be performed simultaneously or in conjunction with each other. It is also possible to control in conjunction with the marking mechanism. As a result, chemical information and image information can be acquired in association with each other, and more reliable diagnosis can be performed. Furthermore, the detection location can be specified more reliably.
- FIGS. 16A shows the internal structure of the capsenolle medical device
- FIG. 16B shows a cross section taken along the line AA of FIG. 16A
- FIG. 16C shows the structure of the sensor
- FIG. 16D shows the drive signal of the motor.
- a sensor surface switching means for switching a sensing sensor surface is formed as a chemical sensor reproducing device. More specifically, the sensor surface to be sensed is sequentially changed.
- the capsule medical system 101 is used for detecting the inside of the patient 2.
- an apparatus 104 an apparatus 104.
- the capsule medical device 103 has a capsule-shaped outer case 111 as shown in FIG. 15, and the outer case 111 has a narrow slit-shaped opening 112.
- the sensor 120 is held by the sensor holder 114 and housed inside
- the sensor holder 114 is relatively rotated (rotated) with respect to the outer case 111, and sequentially moves the sensor surface 119 of the sensor 120 facing the opening 112. It has a sensor surface exposure mechanism for exposing different sensor surfaces 119 by changing over time, or a sensor surface exposure control mechanism.
- a cylindrical sensor holder 114 is fitted in the inner peripheral surface of the outer case 111 and rotatably housed in a substantially cylindrical storage portion inside the outer case 111.
- the main body of the motor 115 is fixed inside one end of the sensor holder 114, and a rotation shaft 115 a projecting from the motor 115 on the center axis O of the sensor holder 114 is provided on the center axis of the outer case 111. For example, it is pressed into the recessed portion.
- the sensor holder 114 fitted and stored inside the outer case 111 is driven to rotate relative to the outer case 111. I have.
- a control circuit 116 for rotating and driving the motor 115 at a predetermined rotation speed is mounted inside the sensor holder 114 adjacent to the motor 115.
- a battery 117 for supplying power to the control circuit 116 and the motor 115 is arranged adjacent to the control circuit 116.
- the battery 117 is housed in a battery housing frame 118, and the battery housing frame 118 is press-fitted into the sensor holder 114 and attached.
- the collected capsule medical device 103 is analyzed by removing the outer case 111 and attaching the internal sensor holder 114 to the analyzer 104.
- the battery housing frame 118 is removed together with the battery housing frame 118 by, for example, pulling out the battery housing frame 118 from the sensor holder 114.
- the outer peripheral surface of the sensor holder 114 formed of a transparent member has a width slightly larger than the size of the opening 112 in the longitudinal direction, and is used for detecting cancer or bleeding to be detected, a tumor marker, and a protein.
- a film may be used in which an antigen, a gene, a protein such as reticin or the like that binds to the detection target is fixed on the sensor surface.
- the senor 120 is formed in a cylindrical shape as shown in FIG. 16B.
- a portion where a reagent layer is provided in the circumferential direction to become the sensor surface 119 and a portion where the reagent layer is not provided. are formed alternately. That is, as shown in an enlarged manner in FIG. 16C, the film-like sensor 120 includes a porous diffusion layer 121a, a reagent layer 121b, and a transparent plastic layer 121c.
- the lower side of the transparent plastic layer 121c is a transparent layer of the sensor holder 114.
- a reagent-free layer 121d having no reagent layer 121b is provided adjacent to the reagent layer 121b, and this reagent-free layer 121d is optical except that it does not react with the reagent layer 121b and an object to be detected.
- the characteristics are substantially the same.
- the detection accuracy is improved by performing the analysis using the reagent layer 121b in consideration of the amount of reflected light from the non-reagent layer 121d (as a reference). So that it can be improved.
- the motor 115 attached to the sensor holder 114 is controlled by the control circuit 116, for example, as shown in FIG. 16D, for example, as a drive signal output intermittently (for example, a pulse signal at the portion indicated by the cross line).
- the drive signal intermittently rotates. More specifically, as shown in FIG. 14, the capsule medical device 103 is swallowed by the patient 2 and exerts an average force from 58 to 48 hours before being excreted out of the patient 2, and the cylindrical sensor 120 The sensor surface 119 is set to make one rotation.
- the outer case 111 has the width
- a sensor 120 is mounted on the outer peripheral surface of a sensor holder 114 rotatably disposed inside the outer case 111, and a sensor 115 is attached to the outer case 111 by a motor 115.
- the sensor surface 119 serving as the detection surface of the sensor 120 is sequentially exposed (released) at the opening 112, and the sensor surface exposed at the opening 112 is released.
- Detection (sensing) is performed by the portion 119, and the sensor surface 119 used for detection by the opening 112 has the opening 112 formed after a predetermined time, and is stored in the outer case 111. To protect the sensor surface 119.
- the capsule medical device 103 After being excreted from the body, the capsule medical device 103 is collected and collected by the analyzer 104.
- the reflection characteristics of the reagent layer 121b on the sensor surface 119 vary depending on the presence or absence of the reaction and the amount of reflected light.
- the detection object is detected or analyzed based on the change.
- the analyzer 104 has a base 123, and a concave portion is formed on the upper surface of the base 123.
- the collected outer case 111 of the capsule medical device 103 is removed, the battery 117 is removed together with the battery housing frame 118, and the motor in the sensor holder 114 is removed.
- the base 123 is provided with a plurality of ring-shaped contacts 124a, 124b, 124c so as to always contact a plurality of contacts provided around the motor 115 and electrically connected to the control circuit 116.
- These contacts 124a, 124b, 124c are connected to a setting & power supply unit 125 provided on the base 123 via a wiring pattern provided on the base 123.
- the setting and power supply unit 125 supplies power for operation to the control circuit 116 side, and performs a setting operation for setting the rotation control in the control circuit 116 at a higher speed. It is designed to be able to rotate faster than the case inside.
- the base 123 has a protrusion 126 projecting upward, and the base of a substantially U-shaped reflected light measuring member 127 is removably fitted into a recess provided in the protrusion 126. You.
- the front end side of the reflected light measuring member 127 is disposed inside the sensor holder 114,
- the light-emitting element 128a and the light-receiving element 128b are attached to the sensor 120, and the light emitted by the light-emitting element 128a irradiates the sensor 120 (the reagent layer 121b) and is reflected on the surface or inside the sensor 120 (the reagent layer 121b).
- the intensity of the emitted light is detected by the light receiving element 128b.
- the light emitting element 128a and the light receiving element 128b are connected to a measuring unit 129.
- the measuring unit 129 controls the amount of light emitted by the light emitting element 128a, and receives the light received by the light receiving element 128b and converts the photoelectrically converted signal into a reagent layer 121b. In addition to performing analysis to measure the amount of the detection target in, the analysis results are saved and displayed.
- the amount of reflected light on the reagent-free layer 121d is referred to make it possible to detect the detection target more accurately than when the reagent-free layer 121d is not provided. ing.
- the patient 2 When examining the body, as shown in FIG. 14, the patient 2 swallows (swallows) the capsule medical device 103 from the mouth.
- the swallowed capsule medical device 103 is excreted from the stomach through the esophagus, the large intestine through the small intestine, and from the anus to the outside of the body. Before being excreted outside the body, the capsule medical device 103 sequentially passes through the esophagus, stomach, small intestine, and large intestine.
- the capsule medical device 103 specifically reacts with the antigen when, for example, an antigen is present as an object to be detected in the body on the sensor surface 119 exposed to the outside when sequentially passing through the esophagus, the stomach, and the like. .
- the sensor holder 114 arranged inside the outer case 111 is slowly and intermittently rotated, for example, by the motor 115, so that the sensor surface 119 of the sensor 120 is placed in the opening 112. Then, they are sequentially exposed to the outside. That is, the sensor surface 119 before the reaction is protected on the inner surface of the outer case 111 until the time when it is used for the reaction.
- the sensor surface 119 exposed at the opening 112 detects a component of a bodily fluid or the like.
- the sensor portion used for detection by the opening 112 is sequentially housed in the exterior case 111 adjacent to the opening 112, so that the sensor surface 119 after detection is protected.
- the outer case 111 is removed from the capsule medical device 103, and the battery housing frame 118 is pulled out from the sensor holder 114.
- the motor 123 attached to the sensor holder 114 is rotated on the base 123 of the analyzer 104.
- the motor body side that is, the sensor holding body 114 side rotates with respect to the case (in this case, the base 23) of the outer case 111 into which the rotating shaft 115a is press-fitted as in the case of the capsule medical device 103.
- the presence or absence of the detection target (reacting with the reagent) held in the reagent layer 121b is determined.
- Optical detection or analysis of the sensing data corresponding to the amount is performed.
- the optical detection result (measurement result) is recorded in the measurement unit 129 and displayed by a display unit (not shown).
- time-series sensing data can be obtained by sequentially exposing (opening) different sensor surfaces 119 to the opening 112 provided in the outer case 111 of the capsule medical device 103.
- the detection target can be continuously detected in the body, and a highly accurate detection result can be obtained with a simple configuration.
- the capsule medical device 103 since the capsule medical device 103 has a structure in which the capsule medical device 103 is simply reacted with and held by the reagent layer 121b, the capsule medical device 103 can be realized at low cost.
- a motor 115 and a control circuit 116 serving as driving means constituting a sensor surface exposing mechanism provided on the capsule medical device 103 side are provided. Since the structure using the medical device 101 is used, the configuration of the capsule medical system 101 can be simplified and the cost can be reduced.
- FIG. 17 shows a configuration in which the capsule medical device of the modified example is collected and the sensor holder 114 is attached to the analysis device 104B to perform the analysis.
- the senor 120 is provided with a reagent layer 121b and a reagent-free layer 121d in the circumferential direction.
- the sensor 120 is further provided with sensors 120a, 120b, 120c provided with, for example, reagent layers having different reagents in the axial direction of the sensor holder 114 (of the capsule medical device 103). ing. That is, the sensors 120a, 120b, and 120c are provided so that the length of the slit-shaped opening 112 is substantially divided into three. Then, sensing of three kinds of detection target objects can be performed at the aperture # 12. Other configurations are the same as in the fourth embodiment.
- the outer case 111 is removed and the battery housing frame 118 is pulled out from the sensor holder 114 as in the case of Embodiment 4, and the battery is removed. Also remove 117 and attach it to the analyzer 104B in FIG.
- the analyzer 104B is different from the analyzer 104 of FIG. 14 in that the light-emitting element 128a and the light-receiving element 128b are further moved in the axial direction of the sensor holder 114 on the distal end side of the reflected light measuring member 27, for example.
- a linear motor 130 is attached.
- This linear motor 130 has a light emitting element 128a and a light receiving element 128b mounted on a movable portion 130a provided with a coil on the stator side by a magnet or the like, and the shaft of the sensor holder 114 is moved along a guide rail (not shown). It is possible to move in the direction.
- a DC current is passed through the coil of the movable part 130a by the measuring part 129 connected via the flexible cable 131, thereby moving the movable part 130a upward as shown by an arrow in Fig. 17. It can be moved downward by applying a reverse direct current. That is, the linear motor 130 moves the movable part 130a on which the light emitting element 128a and the light receiving element 128b are mounted, for example, from a position shown by a solid line to a position shown by a dotted line in FIG. 17, or in the opposite direction. .
- the sensor holder 114 is rotated as in the fourth embodiment, and the light emitting element 128a and the light receiving element 128b are moved in the axial direction of the rotation so that the different sensors 120a , 120b, 120c, etc., so that a plurality of different detection targets can be detected.
- the outer case 111 provided with the slit-shaped opening 112 is rotated in the circumferential direction with respect to the internal sensor holder 114 so as to sequentially move the sensor surface 119. It is good to open (open) the outside. (Example 5)
- FIG. 18A is a plan view showing a capsule medical device 103C of Example 5, and FIG. 18B is a sectional view taken along the line BB of FIG. 18A.
- This embodiment corresponds to an embodiment in which the sensor surface exposure mechanism or the sensor surface exposure control mechanism of the fourth embodiment is modified.
- a fan-shaped opening 142 is provided in the outer case 141, and a disc-shaped opening having sensors 143a, 143b, 143c,.
- the sensor holder 144 is mounted on the rotating shaft 145a of the motor 145 and housed. The rotation of this motor 145 is controlled by a control circuit not shown in FIG.
- the fan-shaped sensors 143a, 143b, and 143c are sequentially exposed in the opening 142, and the exposed sensors 143a, 143b, and 143c are sequentially exposed around the opening 142. It is covered by the outer case 141.
- the sensor surfaces of the different sensors 143a, 143b, and 143c are sequentially exposed (opening).
- the detection target can be continuously detected in the body, and a highly accurate detection result can be obtained.
- FIG. 19A shows a capsule medical device 103D of Example 6 in a plan view
- FIG. 19B shows an internal structure in a longitudinal sectional view.
- This embodiment corresponds to an embodiment in which the sensor surface exposure mechanism or the sensor surface exposure control mechanism of the fourth embodiment is modified.
- the capsule-shaped outer case 151 is provided with a substantially rectangular opening 152 near, for example, substantially the center in the longitudinal direction, and the sensors 153a, 153b, ... are provided so as to bridge between a finolem 159 force S provided on the upper surface thereof, a supply vehicle cause 154, and a winding shaft 155. That is, as shown in FIG. 19B, inside the outer case 151, the supply shaft 154 and the winding shaft 155 are arranged near both ends in the longitudinal direction.
- sensors 153a, 153b,... are formed at predetermined intervals in the longitudinal direction so that the upper surface thereof becomes the sensor surface 157.
- the structure of the finolem 159 and the sensors 153a, 153b,... May be the same as, for example, the structure of the fourth embodiment.
- the rotation of the motor 158 is controlled by a control circuit (not shown), and the rotation of the motor 158 as indicated by an arrow causes the sensor 153i formed on the film 159 to be wound on a winding shaft 155 on the outer peripheral surface of the motor 158. Be taken away. That is, the sensor 153i exposed at the opening 152 moves sequentially to the winding shaft 155 side.
- the outer case 151 further contains a battery and a control circuit (not shown). Further, the winding amount of the finolem 159 and the time at that time may be recorded by a recording device (not shown).
- This embodiment has the same effect as the fourth or fifth embodiment, and also has a structure in which the sensor 153i is formed on the film 159 and wound up.
- the length of the sensor part can be set long, and time-series measurement data with high temporal resolution can be obtained.
- the capsule medical device 103D can be downsized and the structure is simple, low cost can be achieved.
- FIG. 20 is a cross-sectional view showing the internal structure of the capsule medical device 103E according to the seventh embodiment.
- an opening 162 is provided in a capsule-shaped outer case 161.
- a film-shaped third case laminated over three layers.
- a first sensor 163a, a second sensor 163b, and a third sensor 163c are formed on a first layer film 164a, a second layer finolem 164b, and a third layer film 164c, respectively.
- the first sensor 163a and the second sensor 163b are formed on films 164a and 164b formed of substances digested in the digestive tract in the body, respectively.
- the sensor surface 165a of the first sensor 163a is formed on the uppermost layer in the three-layer structure, and is exposed to the opening 162 before the other sensors.
- the sensor surface 165b of the second sensor 163b is formed on the film 164b located in the opening 162 and adjacent to the first sensor 163a. Usually, the film 164a provided with the first sensor 163a is provided. Covers the sensor surface 165b. When the finolem 164a is digested in the digestive tract, the sensor surface 165b is exposed in the opening 162. The sensor surface 165c of the third sensor 163c is located in the opening The sensor surface 165c is formed on the film 164c adjacent to the sensor 163b and is usually provided with the second sensor 163b and the film 164a thereon. When the films 164a and 164b are digested in the digestive tract, the sensor surface 165c is exposed in the opening 162.
- measuring units 166a, 166b, 166c each having a light emitting element and a light receiving element are provided inside the film 164c.
- the measurement units 166a, 166b, and 166c are arranged so that the light beam from the light emitting element is focused on (the reagent layer of) the sensors 163a, 163b, and 163c, respectively, and the reflected light can be received by the light receiving element.
- the films 164b and 164c on the lower (back) side of the sensor 163a are transparent, and the film 164c on the lower (back) side of the sensor 163b is also transparent.
- the measuring units 166a, 166b, 166c are controlled by the control unit 167.
- This control includes a built-in ray timer, not shown, controls the light emission of each light emitting element in the measuring units 166a, 166b, 166c, and converts the signal photoelectrically converted according to the amount of light received by the light receiving element.
- the detection information that the level changes is stored in the storage unit 168. Note that a battery 169 is also built in, and the battery 169 supplies power to the control unit 167 and the like.
- the control unit 167 first sets the measurement unit 166a to the operating state and sets the sensor 163a The operation of storing the information detected by the sensor surface 165a of the storage unit 168 in the storage unit 168 is performed. Thereafter, when a predetermined time elapses, the measuring unit 166b is also set to the operating state, the control unit 167 monitors the value detected by the measuring unit 166b, and the sensor 163b contacts the bodily fluid to reduce the value. If it has changed, the operation of the measuring unit 166a is stopped. Then, the result detected by the measurement unit 166b is stored in the storage unit 168.
- the control unit 167 sets the measurement unit 166c to the operation state and sets the value detected by the measurement unit 166c to the control unit 167.
- the value of the sensor 163c in contact with the body fluid changes, the operation of the measurement unit 166b is stopped. Then, the result detected by the measurement unit 166c is stored in the storage unit 168.
- time-series measurement data is obtained in the body cavity, and furthermore, the measurement data is stored in the storage unit 168. Therefore, detection is performed by the sensors 163a, 163b, and 163c. Even when the result is likely to change with time, measurement data that is not affected by the result can be obtained.
- the configuration described in the present embodiment may be combined with the marking mechanism described in the third embodiment.
- the marking may be performed in conjunction with the detection by the sensor, and the marking information may be stored in the storage unit in association with the sensor detection information.
- FIG. 21 is a sectional view showing the internal structure of a capsule medical device 103F according to the eighth embodiment.
- This capsule medical device 103F corresponds to a modified configuration of the capsule medical device 103E of FIG. Specifically, in the capsule medical device 103E shown in FIG. 20, the sensors 163a, 163b, and 163c are stacked so as to be shifted so as not to overlap. In the present embodiment, the sensors S 163a, 163b, and 163c have a force S that overlaps. Lay it on top. The films 164a and 164c around the sensors 163a to 163c are set to face the opening 162.
- the sensor 163a, 163b, and 163c (the three measurement units 166a, 166b, and 166c are respectively used to measure the detection results by the sensors 163a, 163b, and 163c in FIG. 20).
- the focus distance (focus position) is sequentially changed from the sensor 163a to the sensor 163b and then to the sensor 163c as described below. Note that the result measured by the measurement unit 166 for the sensor 163i at the focused distance is stored in the storage unit 168.
- the measuring unit 166 is mounted on, for example, a piezoelectric element 170 as a variable means of the focus distance of the light beam, and the piezoelectric element 170 can be controlled by the control unit 167.
- the control unit 167 applies a DC voltage to the piezoelectric element unit 170 to vary the thickness of the piezoelectric element unit 170 in the thickness direction in which the measuring unit 166 is mounted, so that the light beam from the light emitting element is emitted. Focusing is performed on the sensor 163i surface, and control is performed so that the reflected light can be appropriately received by the light receiving element.
- control unit 167 controls the piezoelectric element unit 70 so that the position of the sensor 163a is in the focus state. Near the time when the first layer film 164a provided with the sensor 163a provided with the sensor 163a is exhausted and disappears, control is performed so that the position of the sensor 163b becomes the force position. Further, in the vicinity of the time when the second layer film 164b provided with the sensor 163b provided with the sensor 163b has been digested and disappears, control is performed so that the position of the sensor 163c is focused.
- FIG. 22 is a sectional view showing the internal structure of a capsule medical device 103G according to the ninth embodiment.
- This capsule medical device 103G corresponds to a modified configuration of the capsule medical device 103E of FIG. Specifically, in the capsule medical device 103E of FIG. 20, the thickness of the finolems 164a, 164b, 164c provided with the sensors 163a, 163b, 163c is changed so that the position of the detection target can be detected.
- each layer is changed according to the transit time in each organ, such as the stomach, small intestine, and large intestine, and the ease of digestion by digestive juices in each organ.
- a layer corresponding to a desired portion may be thicker than other layers. And it is good to be able to perform more appropriate or reliable inspection at the site where information is desired.
- the film 164a is formed thin, the film 164b is formed thick, and the film 164c is formed thin.
- FIG. 23 is a cross-sectional view showing the internal structure of the capsule medical device 103H according to the tenth embodiment.
- This capsule medical device 103H corresponds to a modified configuration of the capsule medical device 103E of FIG.
- the finolem 164a is formed of a substance that is easily digested in the stomach
- the film 164b is formed of a substance that is easily digested in the small intestine.
- the film 164c may be formed of a substance that is easily digested in the large intestine.
- FIG. 24A shows a capsule medical device 1031 of Example 11
- FIG. 24B shows an analyzing device 104C for collection and inspection.
- the sensing data held by the sensor is used almost as is and analyzed by an analyzing device. .
- this capsule medical device 1031 has, for example, a configuration in which a filtering member 181 is attached to the opening 112 in the capsule medical device 103 in FIG. 16A.
- the contact provided on the sensor holder 114 connected to the control circuit 116 is further provided via a ring-shaped contact inside the outer case 111. It is connected to the contacts 182a, 182b, 182c provided near the outer surface, and covers the contacts 182a, 182b, 182c with an insulating member during normal inspection.
- the uppermost layer of the sensor 120 forming the sensor surface 119 is configured such that the reagent layer 121 b faces without the diffusion layer 121 a.
- Other configurations are the same as those of the capsule medical device 103 in FIG. 16A.
- the capsule medical device 1031 excreted outside the body is collected and the amount of dye or the like that reacts with the detection target fixed (held) by the sensor 120 is measured (analyzed), the capsule medical device 1031 is used. Then, the filter member 181 attached to the opening 112 is removed, and the analysis is performed by the analyzer 104C shown in FIG. 24B.
- a housing 183 for fitting and storing the capsule medical device 1031 is provided on the base 123 of the analyzing device 104 in Fig. 14, and the forceps medical device 1031 is provided in the housing 183. And the contact on the capsule medical device 1031 side is brought into contact with the contacts 184a, 184b, 184c provided on the housing 183.
- These contacts 184a, 184b, and 184c are connected to the setting and power supply unit 25 similarly to the analyzer 104 of FIG. 14, so that the motor 115 in the capsule medical device 1031 can be rotated.
- the storage body 183 is provided with a reflected light measuring unit 185 corresponding to the reflected light measuring member 127 in the analyzer 104 of Fig. 14, and the reflected light measuring unit 185 has a light emitting element for photometry.
- the light emitted by the light emitting element 128a is irradiated on the (reagent layer 21b) of the sensor 120, and the intensity of the light reflected by the (reagent layer 121b) of the sensor 120 is detected by the light receiving element 128b. , So that it can be detected.
- the light emitting element 128a and the light receiving element 128b are connected to the measuring unit 129.
- the sensing information held by the sensor 120 can be detected by removing the filtering member 181 attached to the opening 112 without disassembling the capsule medical device 1031. It should be noted that embodiments and the like configured by partially combining the above-described embodiments and the like also belong to the present invention.
- a built-in chemical sensor can detect tumors, bleeding, enzymes, bacteria, body fluids, pH, genes, and other analytes as they pass through the body cavity, and can be detected by regenerating means It can be used continuously without deterioration of characteristics.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04807154A EP1695662A4 (en) | 2003-12-19 | 2004-12-16 | MEDICAL CAPSULE INSTRUMENT |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003423524A JP4594616B2 (ja) | 2003-12-19 | 2003-12-19 | カプセル型医療システム |
JP2003-423524 | 2003-12-19 | ||
JP2004003503A JP4520161B2 (ja) | 2004-01-08 | 2004-01-08 | カプセル型医療装置 |
JP2004-003503 | 2004-01-08 |
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WO2005058158A1 true WO2005058158A1 (ja) | 2005-06-30 |
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PCT/JP2004/018795 WO2005058158A1 (ja) | 2003-12-19 | 2004-12-16 | カプセル医療装置 |
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US (2) | US8306592B2 (ja) |
EP (1) | EP1695662A4 (ja) |
WO (1) | WO2005058158A1 (ja) |
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Also Published As
Publication number | Publication date |
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EP1695662A4 (en) | 2010-07-07 |
EP1695662A1 (en) | 2006-08-30 |
US20050177069A1 (en) | 2005-08-11 |
US8306592B2 (en) | 2012-11-06 |
US20130060101A1 (en) | 2013-03-07 |
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