WO2002080777A1 - Biophotometre - Google Patents
Biophotometre Download PDFInfo
- Publication number
- WO2002080777A1 WO2002080777A1 PCT/JP2002/000325 JP0200325W WO02080777A1 WO 2002080777 A1 WO2002080777 A1 WO 2002080777A1 JP 0200325 W JP0200325 W JP 0200325W WO 02080777 A1 WO02080777 A1 WO 02080777A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light
- optical waveguide
- optical
- biological
- measurement device
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
- A61B5/6813—Specially adapted to be attached to a specific body part
- A61B5/6814—Head
-
- 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
-
- 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
- A61B5/1455—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 using optical sensors, e.g. spectral photometrical oximeters
- A61B5/14551—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 using optical sensors, e.g. spectral photometrical oximeters for measuring blood gases
- A61B5/14552—Details of sensors specially adapted therefor
-
- 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
- A61B5/1455—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 using optical sensors, e.g. spectral photometrical oximeters
- A61B5/14551—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 using optical sensors, e.g. spectral photometrical oximeters for measuring blood gases
- A61B5/14553—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 using optical sensors, e.g. spectral photometrical oximeters for measuring blood gases specially adapted for cerebral tissue
-
- 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
- A61B2562/02—Details of sensors specially adapted for in-vivo measurements
- A61B2562/0233—Special features of optical sensors or probes classified in A61B5/00
-
- 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
- A61B2562/04—Arrangements of multiple sensors of the same type
- A61B2562/046—Arrangements of multiple sensors of the same type in a matrix array
Definitions
- the present invention relates to a biological light measurement device that measures metabolites inside a living body using light.
- a device that measures biological functions using visible to near-infrared light is disclosed in, for example, Japanese Patent Application Laid-Open No. 57-11532 or Japanese Patent Application Laid-Open No. Sho 63-2-2. It is disclosed in Japanese Patent Publication No. 753223. Further, an invention (optical topography) relating to an image measurement technique for brain function by applying the present measurement principle is proposed in Japanese Patent Application Laid-Open No. 9-99872.
- a means for irradiating light to a subject (living body)
- a means for condensing light passing through the inside of the living body (hereinafter referred to as a condensing means)
- the optical means often includes an optical waveguide represented by an optical fiber or a bundle of optical fibers.
- One set of light irradiation and light collection optical waveguides is a minimum unit representing one measurement position (hereinafter, abbreviated as light irradiation light collection pair).
- a device that sets a plurality of the minimum units and measures the image of a living body is proposed in Japanese Patent Application Laid-Open No. Hei 9-198972.
- the distance between the irradiation position and the light collection position of the light irradiation and collection pair (hereinafter, referred to as the distance between the light irradiation and collection pair) changes depending on the width or depth of the region to be measured. For this reason, in Japanese Patent Application Laid-Open No.
- an optical waveguide for light irradiation and an optical waveguide for light collection are formed of a square lattice so that the distance between each light irradiation and light collecting pair is equal. It proposes an arrangement mode in which they are arranged alternately on vertices. When this arrangement is used, one optical waveguide is shared by a plurality of light irradiation and focusing pairs, so that image measurement can be performed with a small number of optical waveguides. Therefore, the optical waveguide can be mounted on the living body in a short time. Disclosure of the invention
- this arrangement is easy to apply to a narrow area of the living body that can be approximated by the plane of the living body (for example, about 15 cm square in the case of the head), but to an area with a large curvature. It is difficult. In particular, the head shapes of newborns and infants have large curvatures, and individual differences are large. In addition, when measuring newborns, infants, etc., it is impossible for the subject to wait quietly, so the displacement of the probe due to movement must be suppressed. An unexpected problem arises.
- the means for measuring the brain function of newborns and infants has been limited to EEGs so far.
- electroencephalographs are spatially resolved; their ability is not so high, and it is possible to separate information from the brainstem at the central part of the brain Have difficulty.
- the brain function measurement method based on optical measurement allows non-invasive measurement of the cerebral cortex, which is strongly linked to the higher brain functions developed especially in humans. It was expected to be an effective method.
- the biological optical measurement probe used must be able to flexibly adapt to a living body surface having a curvature.
- the probe for measuring biological light used is designed for the distance between incident detection waveguides (exactly, the distance between the tip of the light guide for light irradiation and the tip of the light guide for light collection) for shapes having individual differences. However, for the sake of convenience, it shall be referred to as the distance between incident detections.)) Must not exceed a predetermined allowable range.
- the biological optical measurement probe used must not deviate even with some movement.
- the biological optical measurement probe used must have high visibility and can easily control the state of adhesion so that the adhesion between the optical waveguide and the surface of the living body can be confirmed.
- the fixing means must be able to adapt to the shape of the subject's head.
- the fixing means must be able to apply a moderate pressure.
- the present invention has been made in view of the above points, and provides a living body optical measurement device including a probe having a large curvature and being attachable to a moving body part in living body optical measurement. The purpose is to do.
- the incident optical waveguide and the light collecting optical waveguide tip are connected by a flexible material.
- this flexible material is preferably a material that does not have much elasticity so that the distance between incident detections does not change.
- a silicon wrapper is appropriate.
- a material having a high coefficient of friction is arranged on a surface that comes into contact with a living body, and furthermore, each material is made of an elastic material in order to apply an appropriate pressure to each waveguide. 1 to 2 cm from the tip of the optical waveguide Connected by rollers.
- the present invention provides a light irradiating means for irradiating a light to a test object via an optical waveguide to the test object, and a light irradiating means for irradiating the light irradiated from the light irradiating means and propagating inside the test object.
- a biological light measuring device configured to measure a metabolite inside a test subject using a probe having a light condensing means for condensing light through the light source
- a biological optical measurement device comprising: a plurality of optical waveguides for the light condensing means; and a portion having at least one surface structure, wherein a portion in contact with the test object is provided. I do.
- a distance between the respective optical waveguides may be a predetermined allowable range on a surface where a tip end of each of the optical waveguides of the light irradiation unit and the light collecting unit is in contact with the inspection object.
- a living body optical measurement device characterized by being supported inside.
- the present invention provides the living body light measuring device, wherein in the above-mentioned configuration, the member is constituted by a member having a plurality of divided partial surface structures that come into contact with the object to be inspected.
- the present invention provides a light irradiating means for irradiating light to an object to be inspected through an optical waveguide, and a light condensing means for condensing light radiated from the light irradiating means and propagated inside the object to be inspected through the optical waveguide.
- a biological optical measurement device configured to measure a metabolite inside a test object using a probe having In the probe, a portion that comes into contact with the object to be inspected is formed of a plurality of divided surface structure members, and a plurality of light irradiation optical waveguides and a plurality of light collection detection light beams are provided on each of the surface structure members.
- a biological optical measurement device comprising an optical waveguide, wherein each member of the surface structure is connected via a flexible member.
- FIG. 1 is a diagram showing an embodiment of an optical waveguide fixing portion of a biological optical measurement probe according to the present invention
- FIG. 2 is a diagram showing a configuration example of an optical waveguide arrangement according to the present invention
- FIG. FIG. 4 is a view for explaining a mounting means and a mounting method of the probe for measuring biological light according to the present invention.
- FIG. 4 is a cross-sectional view of an optical waveguide fixing portion of the probe for measuring biological light according to the present invention.
- FIG. 1 shows an optical waveguide fixing portion of a biological optical measurement probe according to the present embodiment.
- FIG. 2 shows an arrangement of the optical waveguide.
- FIG. 3 shows a mounting means for mounting the optical waveguide fixing part on the head and a mounting method thereof.
- FIG. 1 Basically, it consists of a repeating pattern, so only the basic configuration will be described.
- An optical waveguide for irradiating light from the light source to the device to be inspected is composed of an optical waveguide holding unit 1-1-1-1-a and an optical waveguide unit ⁇ -1-2-a. This optical waveguide is introduced into the optical waveguide guide 1-2.
- an optical waveguide guide 112 of an adjacent optical waveguide for condensing has an optical waveguide composed of an optical waveguide holding section 1-1-1-1-b and an optical waveguide section 1-1-2-2-b. This shows a state in which the wave path is already in operation. This figure shows one optical waveguide before insertion and one optical waveguide after insertion.
- the optical waveguides are inserted into all the optical waveguide guides in FIG. Further, in this embodiment, the case where the number of the optical waveguides of the optical waveguide fixing portion is nine is shown, but it is needless to say that the present invention is not limited to this example.
- the optical waveguide is bonded or screwed, integrally formed, or mechanically fixed to the optical waveguide guides 112.
- the joining member 1-3 which joins the optical waveguide fixing guide 112 and the cushion member 114, is made of flexible plastic or the like, and is fitted into the groove formed in the optical waveguide guide 112. ing.
- the cushion members 1 to 4 are made of a material having flexibility and elasticity, such as sponge and silicon.
- the bottom surface of the joining member 113 (the surface in contact with the cushion member 114) is joined to the cushion member 114 with an adhesive or the like.
- the cushion member 114 is adhered to the subject contact member 115 with an adhesive or the like.
- the subject contact member 115 has high compatibility with the subject's tissue from the viewpoint of safety, has a sufficient coefficient of friction so that it does not shift due to body movement, and the light on the subject contact member 115 surface.
- the light source wavelength In order to suppress the reflection of light, the light source wavelength must not be transmitted or reflected (for example, black), and must be soft so that it can flexibly cope with any shape. '
- holes (openings) 1-16 are provided to enhance the air permeability and to check the contact condition of the optical waveguide.
- Examples of a material satisfying these conditions include a silicon wrapper and a cloth, but other materials satisfying the same conditions may be used.
- the shape maintaining member 117 is fixed to the subject contacting member 115 so as to connect the respective optical waveguide guides 1-2 so as to maintain the entire shape.
- This shape holding member 117 is made of linear metal or plastic. If the subject contact members 1-5 have sufficient rigidity In some cases, the curvature of the contact part of the subject may not be large.
- the light attenuating filter 118 is made of a soft material such as vinyl. When the intensity of the light source is strong or the intensity cannot be adjusted by the light irradiation light source, this light attenuation filter 118 is attached so as to cover the tip of the light waveguide for light irradiation. No problem.
- the distal end of the optical waveguide is fixed at a position slightly recessed upward from the surface of the subject contact member 115 that contacts the subject. For example, 0.5 mm
- optical waveguide fixing section The features of the optical waveguide fixing section are listed below.
- connecting members are made of a very soft material, they can be adapted to any shape.
- the distance between the optical waveguides (actually, the distance) does not change at the subject contact part because the optical waveguides are connected at the tip. This contributes to obtaining a spatially uniform signal in which the degree of infiltration of light in each measurement unit is constant.
- Arrangement form 2-2 shown in FIG. 2 (b) is an optical waveguide arrangement used when measuring the temporal region.
- the center vertical axis is slightly higher (1 cm to 2 cm) than the axes on both sides to avoid the ears.
- the optical waveguide is arranged on the vertex of the rhombic lattice. Open circles indicate the positions where optical waveguides for light irradiation are arranged, and black circles indicate the positions where optical waveguides for light detection (light collection) are arranged.
- FIG. 3 is a view of the optical waveguide fixing portion viewed from the surface to be mounted on the head
- (B) is a diagram of the optical waveguide fixing portion viewed from an oblique direction
- (C) is a diagram of the head mounted state.
- the optical waveguide fixing portions 3-1 and 3-2 are held by holding portions 3_3 and 3′′4 of the optical waveguide fixing portion.
- the holding sections 3-3 and 3_4 of the optical waveguide fixing section are made of stretchable green belts or strings 3-3-1 and 3-3-2 and 3-3-3 and 3-3-3. ⁇ 3-4-1 and 3-4-2 and 3-4-3
- Each elastic band or string is connected at both ends of each holding part 3-3 and 3-4 of the fixing part.
- the above-mentioned elastic band or string is light in weight, and it is better to be able to easily check the contact state of the optical waveguide.
- an elastic cloth is used, but a different material may be used as long as it has a similar function.
- the connecting portions 3-5 and 3-6 of the optical waveguide fixing portion holding portion are made for the purpose of connecting the holding portions 3-3 and 3-4 of the optical waveguide fixing portion.
- the shape and function of the connecting portions 3-5 and 3_6 of the optical waveguide fixing portion holding portion are determined for the following reasons.
- the measurement target is a living body, its size varies from individual to individual. In order to cope with this individual difference, the connection distance must be changed.
- the detachable cloth tape is attached to both ends of the holding portions 3-3 and 3-4 of the optical waveguide fixing portion and both ends of the connecting portions 3-5 and 316 of the holding portion of the optical waveguide fixing portion. The distance can be adjusted according to the part circumference.
- the connecting parts 3-5 and 3-6 of the optical waveguide fixing part holding part are in direct contact with the skin of the subject, it is necessary to consider the width and the contact surface of the subject.
- the contact surfaces of the connecting portions 3-5 and 3-6 of the optical waveguide fixing portion holding portion with the subject be made of a soft material and have a high coefficient of friction (to prevent slipping). Silicon wrappers and sponges can be given as materials for that purpose. Of course, other materials may be used as long as they have the same function.
- optical waveguide fixing portions 3-1 and 3-2 are small, Mounting by components is possible. However, when the optical waveguide fixing parts 3-1 and 2-2 are large, it is necessary to apply a uniform pressure to each optical waveguide by using the auxiliary holding part described below.
- the auxiliary holder 3-7-.1-1-a to 3—7—5—a and 3—7—1—b to 3—7—5— b is attached.
- Removable cloth tape is attached to the tip of each auxiliary holder 3-7-1-a to 3-7-5-a and 3-7-1-b to 3-7-5-b.
- the auxiliary holding section 3-7-1-a and the auxiliary holding section 3-7-1-b are connected by adjusting the length according to the shape of the subject's head.
- the other auxiliary holding parts are similarly connected by adjusting the length between a and b.
- the optical waveguides are inserted into all the optical waveguide guides.
- the mounting procedure can be easily performed by performing the order of (A) ⁇ (B) ⁇ (C) in Fig. 3.
- the shape of the holding portion of the optical waveguide fixing portion changes variously depending on the measurement site. Force The main points constituting the holding portion of the optical waveguide fixing portion are as follows.
- a detachable cloth tape is used, and to realize 3), an elastic cloth, rubber, or the like is used.
- FIG. 4 shows a cross-sectional view of the optical waveguide fixing portion of the probe for measuring biological light.
- the optical waveguide is basically composed of an optical waveguide portion 4-11, an optical waveguide holding portion cap 4-11 and an optical waveguide holding portion 4-11.
- the optical waveguide section 4-1-1 penetrates the optical waveguide holding section 4-1-1-3 as shown in the figure, and its tip end is exposed.
- the tip moves up and down under an arbitrary pressure (an elastic body is disposed in the optical waveguide holding section 4'-1-3) as shown by the arrow. By this movement, the tip of the optical waveguide is brought into close contact with the surface of the subject's living body with an appropriate pressure.
- the optical waveguide holder cap 411 and the optical waveguide holder 411 are connected to each other with screws cut on the outer wall surface and the inner wall surface.
- an elastic band or a string constituting the optical waveguide fixing holder 3-3 or 3-4 in FIG. It is fixed by pinching between four and two.
- the elastic band or the cord When the elastic band or the cord is very thin, it may be fixed in a ring shape by sandwiching it in the same manner as described above, or by providing a fixing portion on the optical waveguide holding portion or the optical waveguide guide.
- the joining member 4-3 is a ring-shaped member made of plastic, and joins the cushion member 414 constituting the optical waveguide guide to the optical waveguide holding portion 4-1-3 constituting the optical waveguide. .
- the lower surface of the joining member 413 is joined to the cushion member 414 with an adhesive. Further, a hole formed inside the joining member 413 is fitted in a groove of the optical waveguide holding portion 4-1.3 as shown in the figure. If the optical waveguide and the optical waveguide guide can be manufactured by molding or bonding them together, this joining member is used. Becomes unnecessary.
- the cushion member 4-4 is movable in the direction of the arrow (up and down) as shown in the figure, and an appropriate pressure is applied by an elastic band or a string 412 forming the optical waveguide fixing portion holding portion. Added.
- the light attenuation filter 415 may be attached so as to cover the tip of the light waveguide for light irradiation.
- Each optical waveguide guide and the optical waveguide are connected by a subject contact member 416.
- the subject contact member 416 is preferably as thin as possible, is black, has a high friction coefficient with respect to the subject tissue, and is disposed almost at the tip of the optical waveguide portion 411. In addition, if sweat perspiration and breathability are high, comfort can be further increased.
- the present invention is not limited to the measurement of the head of a baby.
- it can be used for measurement of a human head, measurement of muscles other than the head, and the like.
- a member having high flexibility and a high coefficient of friction is arranged on a contact surface with a living body, and further, in order to apply pressure evenly to the contact surface, the light irradiation means and the light condensing means are made of a stretchable material.
- a living body optical measurement probe that can be easily attached to a living body surface having a large curvature can measure moving parts such as the head and arms of newborns and infants, which have been difficult to measure until now. It has become possible. Further, the present invention leads to expansion of the application range of the biological optical measurement device, Contribution is large. In particular, understanding the developmental process of brain function contributes to fields that have a great impact on human society, such as education.
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02710312A EP1374778A4 (en) | 2001-04-02 | 2002-01-18 | biophotometer |
US10/450,895 US7139600B2 (en) | 2001-04-02 | 2002-01-18 | Biophotometer |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001102806A JP4090699B2 (ja) | 2001-04-02 | 2001-04-02 | 生体光計測装置 |
JP2001-102806 | 2001-04-02 |
Publications (1)
Publication Number | Publication Date |
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WO2002080777A1 true WO2002080777A1 (fr) | 2002-10-17 |
Family
ID=18955953
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2002/000325 WO2002080777A1 (fr) | 2001-04-02 | 2002-01-18 | Biophotometre |
Country Status (4)
Country | Link |
---|---|
US (1) | US7139600B2 (ja) |
EP (1) | EP1374778A4 (ja) |
JP (1) | JP4090699B2 (ja) |
WO (1) | WO2002080777A1 (ja) |
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JP4489385B2 (ja) | 2002-12-12 | 2010-06-23 | 株式会社日立メディコ | 計測プローブ及び生体光計測装置 |
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JPH0481375A (ja) | 1990-07-23 | 1992-03-16 | Topy Ind Ltd | 無限軌道車輌 |
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JP3577335B2 (ja) * | 1993-06-02 | 2004-10-13 | 浜松ホトニクス株式会社 | 散乱吸収体計測方法及び装置 |
CA2131950A1 (en) * | 1993-09-16 | 1995-03-17 | Kazumi Masaki | Fm theta-inducing audible sound, and method, device and recorded medium to generate the same |
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US6577884B1 (en) * | 2000-06-19 | 2003-06-10 | The General Hospital Corporation | Detection of stroke events using diffuse optical tomagraphy |
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- 2002-01-18 EP EP02710312A patent/EP1374778A4/en not_active Withdrawn
- 2002-01-18 WO PCT/JP2002/000325 patent/WO2002080777A1/ja active Application Filing
- 2002-01-18 US US10/450,895 patent/US7139600B2/en not_active Expired - Fee Related
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JPH05261110A (ja) * | 1992-03-19 | 1993-10-12 | Hitachi Ltd | 生体光計測装置 |
JPH0644510U (ja) * | 1992-09-30 | 1994-06-14 | 株式会社島津製作所 | 光走査装置 |
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Also Published As
Publication number | Publication date |
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JP2002291751A (ja) | 2002-10-08 |
US20040054271A1 (en) | 2004-03-18 |
US7139600B2 (en) | 2006-11-21 |
JP4090699B2 (ja) | 2008-05-28 |
EP1374778A4 (en) | 2007-11-14 |
EP1374778A1 (en) | 2004-01-02 |
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