WO2006059672A1 - エバネッセントカテーテルシステム - Google Patents
エバネッセントカテーテルシステム Download PDFInfo
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- WO2006059672A1 WO2006059672A1 PCT/JP2005/022069 JP2005022069W WO2006059672A1 WO 2006059672 A1 WO2006059672 A1 WO 2006059672A1 JP 2005022069 W JP2005022069 W JP 2005022069W WO 2006059672 A1 WO2006059672 A1 WO 2006059672A1
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- Prior art keywords
- light
- optical fiber
- evanescent
- fluorescence
- core
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/645—Specially adapted constructive features of fluorimeters
- G01N21/648—Specially adapted constructive features of fluorimeters using evanescent coupling or surface plasmon coupling for the excitation of fluorescence
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
-
- 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
- A61B5/0071—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence by measuring fluorescence emission
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/27—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using photo-electric detection ; circuits for computing concentration
Definitions
- the present invention relates to an evanescent catheter having an optical fiber for detecting fluorescence from a fluorescent substance excited by introducing an excitation light by placing the distal end of the optical fiber in blood, and more specifically, the distal end of the catheter
- the present invention relates to a catheter system that takes into account the generation structure of evanescent light and the structure that can reliably receive fluorescence from a fluorescent substance.
- Blood is collected as one of the methods for measuring or detecting changes in blood concentration, and non-blood cell components are quantified by a normal method after blood cell separation by using a blood cell separation membrane or a centrifuge. Is done.
- Patent Document 1 an optical method for detecting organic substances contained in blood or the like using optical fiber evanescent light is disclosed in Patent Document 1 (automated system and sample analysis method). This removes the cladding layer of the optical fiber that constitutes the optical sensor, generates evanescent light on the surface of the core layer, immerses this part in a liquid sample such as blood, and detects the fluorescence detected by the liquid sample force. Light is received by a sensor, and organic substances in a liquid sample such as blood are detected through an optical interrogation module.
- Patent Document 2 photodetector
- an optical fiber guide
- a liquid specimen blood, etc.
- the luminescent substance is excited in the evanescent field, and measured by a photoelectric detector.
- a photodetection device is disclosed.
- Patent Documents 1 and 2 a force that can selectively and quantitatively measure a light-emitting composition such as in blood using evanescent light.
- An optical illumination system that generates evanescent light on the core coating except for the cladding at the tip of the bar is a general structure, and the light receiving optical system is constituted by a reflection feedback optical path of an optical fiber.
- evanescent light is generated on the surface of the light guide, and the light receiving system is performed by a photoelectric detector provided separately on the other end side of the light guide.
- Patent Documents 1 and 2 commonly quantitate by separately taking out a liquid sample.
- red blood cells must be separated in advance as necessary.
- Patent Documents 1 and 2 relate to the tip of the optical fiber. There is no detailed disclosure of the special structure.
- Patent Documents 3, 4 and 4 5 is disclosed.
- Patent Document 3 optical fiber sensor for absorption spectrum measurement using total reflection and its system removes a part of the clad portion of the optical fiber as shown in FIG.
- the sensor unit using evanescent light by total reflection is inserted into the living body, the sensor unit is brought into direct contact with the living tissue, and the evanescent light is propagated by repeating the total reflection in the sensor unit.
- Evanescent light is absorbed by the chemical component of the living tissue that has contacted the sensor, changes its spectrum, is reflected by the total reflection curtain, is absorbed again by the chemical component, and the reflected light is reflected back to the optical fiber. It is.
- the configuration in the vicinity of the cladding portion at the tip of the optical fiber in Cited Document 3 is to make the intensity of the evanescent light generated outside the cladding portion in accordance with the intensity of the incident light. Capture spectral changes that are absorbed and changed by chemical components Can However, the fluorescence generated in the area where evanescent light outside the optical fiber is generated cannot be captured by the optical fiber and returned to the incident side.
- Patent Document 4 is the shape of an optical probe of a near-field optical microscope that detects the presence of chemical substances including blood in living tissue. , 2, 5, 7 and 8, the tip is a conical projection of the core from the cladding, and a light shielding film is formed on the core and cladding surface of the projection except for the opening at the tip.
- the optical fiber probe collects light by providing a light-shielding film on the conical core portion of the protrusion, thereby strengthening the evanescent field generated on the surface of the core detection end and increasing the detection sensitivity. .
- the scattered light from the sample in the evanescent field is incident on the opening at the tip having a very small surface area as shown in FIG. This is disadvantageous in terms of collection, and the increase in the total received light power is considered to be small. Further, it does not directly detect the intensity of fluorescence from a fluorescent substance in a living tissue.
- Patent Document 5 optical fiber and manufacturing method thereof is used in a photon scanning microscope that detects evanescent light localized in a region smaller than the wavelength of light on the surface of a substance, and the like.
- An optical fiber having an opening with a light-shielding coating layer formed on the surface of the sharpened core and exposing the tip, and light from the other end of the optical fiber.
- the light incident on the end of the optical fiber is collected at the tapered portion and irradiated outside the opening force.
- the evanescent light generated near the surface of the material is scattered, and the scattered light is guided to the core through the opening and output from the other end of the optical fiber.
- the clad diameter has hitherto been much larger than the length of the detection end, so that the clad end could collide with the surface of the sample and possibly damage the tip of the sample or the optical probe. This solves the problem and increases the detection efficiency of the optical probe without the clad edge colliding with the sample surface.
- This configuration is also similar to Patent Document 4, and as described above, it is not effective in collecting scattered light. It is considered that the increase in received light power as a total is small.
- Patent Document 1 Japanese Patent No. 3429282
- Patent Document 2 Japanese Patent Publication No. 2000-516719
- Patent Document 3 Japanese Patent Laid-Open No. 2002-214132
- Patent Document 4 Japanese Patent Laid-Open No. 10-2905
- Patent Document 5 Japanese Patent No. 3278164
- the present invention solves the above-mentioned problems, and an object of the present invention is to provide a catheter equipped with an optical fiber that uses evanescent light, and is not disturbed by light absorption of hemoglobin in erythrocytes, and fluorescence of substances around the tip of the catheter.
- An object of the present invention is to provide an evanescent catheter system that has an optical fiber tip structure capable of reliably measuring the intensity and fluorescence spectrum, and that can measure the abundance of a fluorescent substance present in the evanescent light generation portion.
- claim 1 of the present invention provides an evanescent light generated by removing the cladding layer and placing the optical fiber exposing the core layer in the blood, and is excited by the evanescent light.
- An evanescent catheter system that detects fluorescence in the blood based on the fluorescence intensity and measures the abundance of the substance in the blood based on the fluorescence intensity, and covers substantially half of the cladding covering the core at the cylindrical tip of the optical fiber.
- a light receiving element is disposed on the back surface of the optical filter, and fluorescence from the fluorescent substance is detected by the light receiving element.
- Claim 2 of the present invention comprises a first optical fiber for sending excitation light and a second optical fiber for receiving fluorescence, and the cladding layer of the first optical fiber is removed, The optical fiber with the core layer exposed is placed in blood to generate evanescent light, and the fluorescence from the fluorescent material excited by the evanescent light is received by the second optical fiber and the fluorescence intensity is received.
- An evanescent catheter system for measuring the abundance of a substance in the blood based on the above, by removing substantially half of the cladding layer covering the core at the cylindrical tip of the first optical fiber, thereby removing the upper cylindrical surface of the core
- An evanescent light is generated in the first optical fiber
- a reflecting mirror is disposed in the second optical fiber facing the core from which approximately half of the cladding is removed, and the reflecting mirror reflects the fluorescence of the fluorescent material force.
- the fluorescent light is guided to the output end of the second optical fiber.
- the clad layer is removed, the optical fiber with the core layer exposed is placed in blood to generate evanescent light, and fluorescence from the fluorescent material excited by the evanescent light is detected.
- An evanescent catheter system for measuring the abundance of a substance in blood based on fluorescence intensity, wherein a core layer is removed by removing the cladding layer around the core in a predetermined range at the cylindrical tip of the optical fiber.
- An inclined surface is formed from the upper end of the tip toward the root, and a reflecting mirror is disposed on the inclined surface to generate evanescent light on the top surface of the removed core of the core.
- the fluorescence is guided to the output end of the optical fiber by reflecting the fluorescence.
- the clad layer is removed, the optical fiber with the core layer exposed is placed in blood to generate evanescent light, and fluorescence from the fluorescent material excited by the evanescent light is detected.
- An evanescent catheter system for measuring the abundance of a substance in blood based on fluorescence intensity, wherein approximately half of the cladding covering the core at the cylindrical tip of the optical fiber is removed, and the cladding is removed.
- Evanescent light is generated on the exposed cylindrical upper surface of the core, and a number of reflecting mirrors are formed on the lower cylindrical surface of the core cylindrical surface from which the cladding is removed so as to have a predetermined inclination angle with respect to the optical axis.
- the fluorescent light from the fluorescent material is reflected by the multiple reflecting mirrors so that the fluorescence is guided to the output end of the optical fiber.
- the clad layer is removed, the optical fiber with the core layer exposed is placed in the blood to generate evanescent light, and the fluorescence from the fluorescent material excited by the evanescent light is detected.
- the tip of the optical fiber is placed in the blood to generate evanescent light, the fluorescence from the fluorescent material excited by the evanescent light is detected, and the substance in the blood is detected based on the fluorescence intensity.
- An evanescent catheter system for measuring abundance wherein the protective layer of the cladding layer at the cylindrical tip of the optical fiber is deleted and the core in the cladding layer is formed in a spiral shape, and the spiral core The more leaked excitation light reaches the cylindrical surface of the cladding layer to generate evanescent light on the cylindrical surface of the cladding layer, and the fluorescence from the fluorescent material is reflected by the spiral core portion to output the optical fiber. The fluorescence is guided to an end.
- evanescent light is generated in the vicinity of the core layer, that is, about 0. of the surface of the core layer, red blood cells have a size of several / zm, and fluorescent substances such as riboflavin and provophor are used. Since the molecular size of pyrilbin is 1 nm 1000 nm or less with respect to erythrocytes, it is not affected by hemoglobin in erythrocytes and can reliably detect fluorescence from a fluorescent substance excited by evanescent light. Since this fluorescence intensity depends on the amount of fluorescent substance present in the portion of evanescent light, the abundance of a fluorescence generating substance such as riboflavin can be calculated based on the fluorescence intensity.
- FIG. 1 is a diagram showing a configuration example of an evanescent catheter system according to the present invention, which is applied to third, fourth, fifth and sixth embodiments of the structure of a force tail.
- FIG. 2 is a diagram showing a configuration example of an evanescent catheter system according to the present invention, which is applied to the second embodiment of the structure of the force tail.
- FIG. 3 is a diagram showing an example of an excitation light and fluorescence separation optical system.
- FIG. 4 is a diagram showing a first embodiment of the catheter tip of the evanescent catheter system according to the present invention, where (a) is a front sectional view, (b) is a side sectional view, and (c) is a perspective view. Each is shown.
- FIG. 5 is a diagram showing a second embodiment of the catheter tip of the evanescent catheter system according to the present invention, where (a) is a front sectional view, (b) is a side sectional view, and (c) is a perspective view. Each is shown.
- FIG. 6 is a diagram showing a third embodiment of the catheter tip of the evanescent catheter system according to the present invention, where (a) shows a front sectional view and (b) shows a side sectional view.
- FIG. 7 is a diagram showing a fourth embodiment of the catheter tip of the evanescent catheter system according to the present invention, where (a) is a front sectional view and (b) is a side sectional view.
- FIG. 8 is a view showing a fifth embodiment of the distal end portion of the catheter of the evanescent catheter system according to the present invention, where (a) shows a front sectional view and (b) shows a side view.
- FIG. 9 is a view showing a sixth embodiment of the distal end portion of the catheter of the evanescent catheter system according to the present invention, where (a) shows a front sectional view and (b) shows a side view.
- FIG. 10 shows an example of an evanescent catheter.
- FIG. 11 is a diagram showing an example of a system in which an evanescent catheter is placed in a living tissue and the amount of fluorescent substance in blood is measured.
- Light source semiconductor laser, LED, xenon lamp, etc.
- FIG. 1 is a diagram showing a configuration example of an evanescent catheter system according to the present invention. This example is a configuration diagram of an optical system and a circuit system applied to the force taper structure of the third, fourth, fifth and sixth embodiments (FIGS. 6, 7, 8, and 9).
- the control unit 8 sends a light source activation control signal to the light source control unit 11 based on an instruction from the console 12.
- the light source controller 11 activates a light source 13 such as a semiconductor laser or a xenon lamp.
- the excitation light of the light source 13 passes through the condenser lens 14 and the excitation filter 15, is reflected by the reflecting mirror 16 and the dichroic mirror 3, and is guided to the optical fiber end of the optical connector 1 by the condenser lens 2.
- Optical fiber end force The incident excitation light is transmitted to the tip of the evanescent catheter.
- Fluorescence from the tip of the evanescent catheter is output from the end of the same optical fiber, passes through the condenser lens 2, the dichroic mirror 3, and further passes through the fluorescence behind the dichroic mirror 3 (bandpass filter). 4) The light enters the light detector 6 such as a photomultiplier or a photodiode through the condenser lens 5.
- the photodetector 6 is in a state in which fluorescence can be detected by receiving an activation signal and a timing signal from the detector controller 7b.
- the fluorescence (predetermined wavelength region) detected by the photodetector 6 is converted into an electric signal and amplified by the detector amplifier 7a.
- control unit 8 Based on the control program, the control unit 8 performs light source control and measurement operation using an arithmetic element such as a CPU, and AZD converts the received output of the amplifier 7a to calculate the fluorescence intensity based on a predetermined formula. Based on the fluorescence intensity, the abundance of the fluorescent substance in the blood is calculated.
- an arithmetic element such as a CPU
- AZD converts the received output of the amplifier 7a to calculate the fluorescence intensity based on a predetermined formula. Based on the fluorescence intensity, the abundance of the fluorescent substance in the blood is calculated.
- the monitor 9 displays a menu screen for the measurement operation, and displays the measured fluorescence intensity and the amount of fluorescent substance present.
- specifications such as the light source output and wavelength range are displayed, and the light emission wavelength and output of the light source and selection of the fluorescent filter can be adjusted using the console 12. It is also possible to adjust the calculation contents to be output.
- the recorder 10 is engraved with changes in fluorescence intensity due to fluorescent substances such as riboflavin in the blood over time.
- the semiconductor laser is monochromatic light
- a bandpass filter such as an excitation filter is not necessary on the light source side.
- the evanescent catheter can be attached with a thin injection tube, a balloon expansion pipe, or the like.
- In-vivo substances bilirubin, vitamin B, etc.
- Drugs Provophor, riboflavin, indocyanine green, etc.
- the above drugs are injected into the living body by intravenous injection.
- excitation light of a target fluorescent substance such as riboflavin or indocyanine green
- riboflavin uses light around 450 nm
- indocyanine green uses light around 750 nm.
- the term “near” means the light in the excitation wavelength band.
- the light output from the optical fiber has a fluorescence emission wavelength, which is a wavelength band having a peak wavelength of 525 nm for fluorescence by riboflavin, and a wavelength band having a peak of 830 nm for emission by indocyanine green.
- the fluorescence intensity is a
- I is the number of fluorescent photons per unit volume (cm 3 )
- Fluorescein mentioned here has many molar extinction coefficients and high quantum yields. Many of the fluorescent molecules in the bovine body have 1Z100 or less. Also, the concentration is often much lower than 1 ju M. Therefore, it is an ideal maximum intensity calculation.
- the optical fiber used has a diameter r of 0.25 mm and a length that generates evanescent light of 10 mm.
- the excitation light intensity F incident on the optical fiber is 10 mW (To be exact, it must be indicated by the number of photons, but since the wavelengths of the excitation light and the fluorescence are close, they are displayed in units of energy. The same).
- this intensity of light is evanescent light.
- the excited volume V is 100 nm (0.00001 cm) when the thickness t where the evanescent light is generated is 100 nm (0.00001 cm).
- V 2 X ⁇ X r XLX t
- the generated fluorescence intensity is F
- the incident excitation light intensity of about 1Z335 becomes fluorescence.
- the area where the evanescent light is generated is considered to be half of the above calculation condition, and the fluorescence incidence efficiency is considered to be about 30%. Therefore, about 1Z2 000 can be received as fluorescence.
- the incident efficiency is poor, and therefore the fluorescence that can be received is even weaker.
- FIG. 2 is a diagram showing a configuration example of the evanescent catheter system according to the present invention, and is an example applied to the second embodiment of the structure of the catheter tip. Since only optical fibers are used for excitation light incidence and fluorescence output, respectively, this is different from Fig. 1, so only the different structure will be explained.
- optical fiber end 17a At the end of the optical connector 17, there are two optical fiber ends 17a, 17b.
- An output optical system for receiving the fluorescence output is connected to the optical fiber end 17a in the same manner as in FIG.
- a condensing lens 18, a reflecting mirror 16, 19, a pumping filter 15 and a condensing lens 14 are disposed at the optical fiber end 17b, and pumping light from a light source 13 such as a semiconductor laser is transmitted to the optical fiber end 17b.
- a light source 13 such as a semiconductor laser
- the reflectors 16 and 19 on the light source side in this embodiment are omitted if a small semiconductor laser or the like is used for the force light source 13 used because the distance between the incident side and the emission side of the optical connector 17 of the evanescent catheter is small. It is possible. In addition, since the semiconductor laser is monochromatic light, a bandpass filter for an excitation filter or the like is not required on the light source side.
- FIG. 3 is a diagram showing an example of an excitation light and fluorescence separation optical system.
- the returned excitation light is processed by inserting a dichroic mirror or notch filter 81 into the light receiving optical system and transmitting the excitation light toward the excitation light absorption cone 82.
- the excitation level does not return to the detector 6 so that the relative level of fluorescence is increased.
- FIG. 4 is a diagram showing a first embodiment of the catheter tip of the evanescent catheter system according to the present invention, where (a) is a front sectional view, (b) is a side sectional view, and (c) is a perspective view. Show.
- the protective layer 22 and the clad 23 are removed over the semicircle of the optical fiber. Further, by arranging a reflecting mirror at the tip of the optical fiber, the intensity of the evanescent light can be increased and the leakage of the excitation light into the blood can be reduced.
- An optical filter 26 is arranged in an arc shape facing the core 24a of the lower half of the removed portion. Further, a photodiode 28 is similarly arranged in an arc shape on the rear surface. The photodiode 28 is connected to a non-illustrated electric wire, and the electric wire is provided so as to reach the other end of the catheter 21.
- an interference filter or the like that can extract an arbitrary wavelength with a band width of several lOnm using several nanometers by utilizing the interference action of light can be used.
- riboflavin when used as a fluorescent substance, it passes through a wavelength range from several nm to several lOnm centering on 525 nm, and other wavelengths are cut.
- the optical filter 26 is formed at the distal end portion of the catheter by a thin film deposition technique, and the semicylindrical photodiode 28 is formed by a semiconductor production technique.
- the signal processing circuit has a lock-in amplifier or the like. It is necessary to insert
- the structure of the distal end of this catheter does not require a light receiving optical system in the signal processing apparatus of FIG. 1, but only an optical system that sends out excitation light from a light source. It becomes the structure which inputs to the amplifier 7.
- the evanescent light 25 is generated on the surface of the upper half of the core 24 that is exposed.
- the fluorescence 30 generated by the fluorescent substance is incident on the photodiode 28 after the excitation light 29 is removed by the optical filter 26.
- the outer shape of the catheter can be reduced, and the size can be made equal to or smaller than that of a normal catheter.
- the force tail that measures oxygen saturation can reduce the outer shape of the catheter as a single optical fiber that normally uses two optical fibers.
- the efficiency of receiving fluorescence is high.
- FIG. 5 is a diagram showing a second embodiment of the catheter tip of the evanescent catheter system according to the present invention, where (a) is a front sectional view, (b) is a side sectional view, and (c) is a perspective view. Each figure is shown.
- This embodiment uses the signal processing apparatus of FIG.
- the protective layer 32 and the cladding 33 are removed in a semicircle near the tip of the optical fiber for pumping light.
- a reflecting mirror at the tip of the optical fiber, the intensity of the evanescent light can be increased and the leakage of the excitation light into the blood can be reduced.
- Reflective mirrors such as off-axis paraboloidal mirrors 36 and plane mirrors are formed on the corresponding portions of the other optical fiber for receiving fluorescence.
- the excitation light 38 enters the optical fiber for excitation light
- the evanescent light 35 is generated on the surface of the upper half of the core 34 that is exposed.
- the fluorescent light 39 generated by the fluorescent material is reflected by the reflecting mirror and guided to the end of the optical fiber for receiving the fluorescent light.
- Catheters for measuring oxygen saturation usually use two optical fibers, and although the same size is used, the excitation light and fluorescence are separated through different optical fibers! . Moreover, it is easy to manufacture with relatively high efficiency of receiving fluorescence.
- FIG. 6 is a view showing a third embodiment of the catheter tip of the evanescent catheter system according to the present invention, where (a) shows a front sectional view and (b) shows a side sectional view.
- the clad 43 is removed in the vicinity of the distal end portion of the catheter 41, and the distal end portion of the core 44 has a shape 44a in which one end force of the distal end portion of the circular column is also cut off in an oblique direction. Cut face A reflecting mirror 47 such as an off-axis paraboloidal mirror or a plane mirror is formed.
- the evanescent light 45 When the excitation light 48 is incident, the evanescent light 45 is generated on the upper surface of the core shape 44a from which the cladding 43 is removed.
- the fluorescent light 49 excited by the evanescent light 45 and emitted by the fluorescent substance force is reflected by the reflecting mirror 47 and returns to the optical fiber.
- FIG. 7 is a diagram showing a fourth embodiment of the distal end portion of the catheter of the evanescent catheter system according to the present invention, where (a) shows a front sectional view and (b) shows a side sectional view.
- the cladding 53 is removed over the upper semicircle.
- the lower half surface of the core portion 54a from which the clad 53 has been removed has a large number of reflecting mirrors 57 similar in shape to the Fresnel surface.
- the evanescent light 55 When the excitation light 58 is incident, the evanescent light 55 is generated on the upper surface of the core shape 54a from which the cladding 53 is removed.
- the fluorescent light 59 that is excited by the evanescent light 55 and emits a fluorescent material force is reflected by a number of reflecting mirrors 57 and returns to the optical fiber.
- the third and fourth embodiments use the signal processing apparatus of FIG.
- these catheters can be manufactured easily because the external shape is thin, and the third structure can be manufactured easily.
- light other than evanescent light leaks strongly due to the effect of the reflector.
- the detection area is approximately the same as in the second embodiment, and the efficiency of receiving fluorescence is low V. Therefore, it is necessary to sufficiently separate the excitation light and the fluorescence signal in the signal processing device.
- FIG. 8 is a view showing a fifth embodiment of the catheter tip of the evanescent catheter system according to the present invention, where (a) shows a front sectional view and (b) shows a side view.
- the protective layer 62 and the clad 63 are removed, and the core 64 becomes conical!
- the evanescent light 65 When the excitation light 68 is incident, the evanescent light 65 is generated on the entire surface of the conical core 64a.
- the evanescent light 65 emits a fluorescent material, and the fluorescent light 69 returns to the optical fiber.
- the outer shape of the catheter can be reduced and the manufacture is easy. Note that light other than the evanescent light leaks strongly due to the taper of the optical fiber. Since the detection area is narrow and the efficiency of receiving fluorescence is low, it is necessary to sufficiently separate the excitation light and the fluorescence signal in the signal processing device. Become.
- FIG. 9 is a view showing a sixth embodiment of the catheter tip of the evanescent catheter system according to the present invention, where (a) is a front sectional view and (b) is a side view.
- (a) is a front sectional view and (b) is a side view.
- the protective layer 72 is removed, and the cylindrical cladding 73a is exposed.
- a core 74 is formed in a spiral shape 74 a inside the exposed end portion 73 a of the clad 73.
- the reflecting mirror 77 at the end portion of the optical fiber, the intensity of the evanescent light can be increased and the leakage of the excitation light into the blood can be reduced.
- Excitation light 79 penetrates into the cladding 73a. As a result, evanescent light 75 is generated on the surface of the clad 73a. Similarly, the excitation light reflected by the reflecting mirror 77 penetrates the cladding 73a at the falling surface of the wave shape 74a with respect to the traveling direction of the excitation light 79, and generates evanescent light 75 on the surface of the cladding 73a.
- the fluorescence 80 emitted from the fluorescent material by the evanescent light 75 is captured by the optical fiber through the reverse path and returns to the incident end.
- the outer shape of the catheter can be narrowed, and the detection area can be increased compared with other embodiments.
- Light other than evanescent light leaks strongly due to the meandering of the optical fiber.
- FIG. 10 is a diagram showing an example of an evanescent catheter.
- the catheter has an optical fiber insertion part, a sampling port, and a liquid or drug administration port.
- a connector is connected to the end of the optical fiber and is connected to a measurement device that is a signal processing device.
- FIG. 11 is a view showing a state in which the evanescent catheter is placed in a living tissue.
- Upper arm base force A catheter is inserted, and the tip reaches a predetermined vein portion of the heart.
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Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/720,398 US8208982B2 (en) | 2004-12-01 | 2005-12-01 | Evanescent catheter system |
EP05811430.7A EP1818013B1 (en) | 2004-12-01 | 2005-12-01 | Evanescent catheter system |
KR1020077015105A KR101224330B1 (ko) | 2004-12-01 | 2005-12-01 | 에버네센트 카테터 시스템 |
Applications Claiming Priority (2)
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JP2004-348482 | 2004-12-01 | ||
JP2004348482A JP4423421B2 (ja) | 2004-12-01 | 2004-12-01 | エバネッセントカテーテルシステム |
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WO2006059672A1 true WO2006059672A1 (ja) | 2006-06-08 |
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Family Applications (1)
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PCT/JP2005/022069 WO2006059672A1 (ja) | 2004-12-01 | 2005-12-01 | エバネッセントカテーテルシステム |
Country Status (5)
Country | Link |
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US (1) | US8208982B2 (ja) |
EP (1) | EP1818013B1 (ja) |
JP (1) | JP4423421B2 (ja) |
KR (1) | KR101224330B1 (ja) |
WO (1) | WO2006059672A1 (ja) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8777891B2 (en) | 2006-07-27 | 2014-07-15 | Fresenius Medical Care Holdings, Inc. | Apparatus and methods for early stage peritonitis detection and for in vivo testing of bodily fluid |
US8728023B2 (en) | 2006-07-27 | 2014-05-20 | Fresenius Medical Care Holdings, Inc. | Apparatus and methods for early stage peritonitis detection including self-cleaning effluent chamber |
US8801652B2 (en) | 2006-07-27 | 2014-08-12 | Fresenius Medical Care Holding, Inc. | Early stage peritonitis detection apparatus and methods |
US8396539B2 (en) * | 2007-02-16 | 2013-03-12 | Medtronic, Inc. | Implantable medical device having optical fiber for sensing electrical activity |
EP2197511B1 (en) * | 2008-01-25 | 2021-01-06 | Fresenius Medical Care Holdings, Inc. | Apparatus for early stage peritonitis detection |
US8463083B2 (en) | 2009-01-30 | 2013-06-11 | Claudio Oliveira Egalon | Side illuminated multi point multi parameter optical fiber sensor |
JP5569711B2 (ja) | 2009-03-01 | 2014-08-13 | 国立大学法人浜松医科大学 | 手術支援システム |
US20150238085A1 (en) * | 2012-08-23 | 2015-08-27 | Sbi Pharmaceuticals Co., Ltd. | Photodynamic diagnosis apparatus provided with collimator |
DE102013211837A1 (de) * | 2013-06-21 | 2014-12-24 | Gilupi Gmbh | Katheter mit Detektionsvorrichtung zum Echtzeitnachweis eines Probenmaterials |
EP3145385A4 (en) * | 2014-05-22 | 2018-02-14 | Invuity, Inc. | Medical device featuring cladded waveguide |
JP6833371B2 (ja) * | 2016-07-12 | 2021-02-24 | 浜松ホトニクス株式会社 | 光出力モニタ装置、光出力モニタ方法、保護キャップおよびアダプタ |
KR101850252B1 (ko) * | 2017-09-21 | 2018-06-01 | 김민정 | 광학밀도 분석계 |
JP7377496B2 (ja) * | 2020-07-06 | 2023-11-10 | 冨士色素株式会社 | 内視鏡用波長変換部材、及びこれを用いた内視鏡 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04221743A (ja) * | 1990-03-19 | 1992-08-12 | Eli Lilly & Co | ファイバオプチック干渉計センサ |
JP2002214132A (ja) * | 2001-01-16 | 2002-07-31 | Japan Science & Technology Corp | 全反射を用いた吸収スペクトル測定用光ファイバーセンサ及びそのシステム |
WO2003005890A2 (en) * | 2001-07-09 | 2003-01-23 | Arizona Board Of Regents A Body Corporate Acting On Behalf Of Arizona State University | Affinity biosensor for monitoring of biological process |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03278164A (ja) | 1990-03-28 | 1991-12-09 | Toshiba Corp | イオン伝導体ニューラルネットワーク装置 |
GB2246487B (en) * | 1990-06-18 | 1994-08-03 | York Ltd | An optical fibre communication network |
US5399866A (en) * | 1993-03-24 | 1995-03-21 | General Electric Company | Optical system for detection of signal in fluorescent immunoassay |
US5349954A (en) * | 1993-07-23 | 1994-09-27 | General Electric Company | Tumor tissue characterization apparatus and method |
ATE391289T1 (de) | 1994-05-31 | 2008-04-15 | Kanagawa Kagaku Gijutsu Akad | Optische faser und deren herstellung |
US5833603A (en) * | 1996-03-13 | 1998-11-10 | Lipomatrix, Inc. | Implantable biosensing transponder |
JP3268201B2 (ja) | 1996-06-14 | 2002-03-25 | 財団法人神奈川科学技術アカデミー | 光ファイバプローブ |
EP0918984B1 (de) | 1996-08-16 | 2001-06-27 | Zeptosens AG | Optische detektionsvorrichtung |
JP4772235B2 (ja) * | 2001-09-13 | 2011-09-14 | オリンパス株式会社 | 内視鏡装置 |
US7473548B2 (en) * | 2003-04-25 | 2009-01-06 | Medtronic, Inc. | Optical detector for enzyme activation |
-
2004
- 2004-12-01 JP JP2004348482A patent/JP4423421B2/ja active Active
-
2005
- 2005-12-01 EP EP05811430.7A patent/EP1818013B1/en not_active Not-in-force
- 2005-12-01 KR KR1020077015105A patent/KR101224330B1/ko not_active IP Right Cessation
- 2005-12-01 US US11/720,398 patent/US8208982B2/en not_active Expired - Fee Related
- 2005-12-01 WO PCT/JP2005/022069 patent/WO2006059672A1/ja active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04221743A (ja) * | 1990-03-19 | 1992-08-12 | Eli Lilly & Co | ファイバオプチック干渉計センサ |
JP2002214132A (ja) * | 2001-01-16 | 2002-07-31 | Japan Science & Technology Corp | 全反射を用いた吸収スペクトル測定用光ファイバーセンサ及びそのシステム |
WO2003005890A2 (en) * | 2001-07-09 | 2003-01-23 | Arizona Board Of Regents A Body Corporate Acting On Behalf Of Arizona State University | Affinity biosensor for monitoring of biological process |
Also Published As
Publication number | Publication date |
---|---|
EP1818013A4 (en) | 2009-08-05 |
KR20070102676A (ko) | 2007-10-19 |
EP1818013A1 (en) | 2007-08-15 |
JP2006149938A (ja) | 2006-06-15 |
US20080275325A1 (en) | 2008-11-06 |
JP4423421B2 (ja) | 2010-03-03 |
US8208982B2 (en) | 2012-06-26 |
EP1818013B1 (en) | 2013-04-24 |
KR101224330B1 (ko) | 2013-01-18 |
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