JPH07151778A - Probe for laser blood flow meter - Google Patents
Probe for laser blood flow meterInfo
- Publication number
- JPH07151778A JPH07151778A JP5299946A JP29994693A JPH07151778A JP H07151778 A JPH07151778 A JP H07151778A JP 5299946 A JP5299946 A JP 5299946A JP 29994693 A JP29994693 A JP 29994693A JP H07151778 A JPH07151778 A JP H07151778A
- Authority
- JP
- Japan
- Prior art keywords
- probe
- blood flow
- fiber
- flow meter
- laser
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000017531 blood circulation Effects 0.000 title claims abstract description 25
- 239000000523 sample Substances 0.000 title claims abstract description 19
- 239000013307 optical fiber Substances 0.000 claims abstract description 19
- 239000000835 fiber Substances 0.000 abstract description 22
- 210000004369 blood Anatomy 0.000 abstract description 8
- 239000008280 blood Substances 0.000 abstract description 8
- 239000011347 resin Substances 0.000 abstract description 3
- 229920005989 resin Polymers 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 210000003743 erythrocyte Anatomy 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
Landscapes
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、皮膚組織内の毛細血管
を流れる血液の流量を無侵襲で測定するレーザ血流計の
ためのプローブに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a probe for a laser blood flow meter which noninvasively measures the flow rate of blood flowing through capillaries in skin tissue.
【０００２】[0002]
【従来の技術】皮膚組織内の毛細血管を流れる血液の流
量、すなわち、血流は皮膚の状態を表わす客観的な指標
の１つとして重要である。血流を直接的に測定する装置
の１つとして、レーザ血流計がある（例えば、鹿嶋ほ
か、レーザ血流計の特性、日本レーザ医学会誌、９， N
o.１，３−７（１９８８）参照）。これは、皮膚組織内
で散乱される光が組織内を流れる赤血球によりドップラ
ーシフトを受けて周波数変調される現象を利用するもの
で、送光ファイバを介して皮膚面にレーザ光を照射し、
皮膚組織内で散乱された光の一部を送光ファイバの近傍
に配置した受光ファイバで受光し、フォトダイオードで
電気信号に変換して解析することによって血流値を算出
する。2. Description of the Related Art The flow rate of blood flowing through capillaries in skin tissue, that is, blood flow, is important as one of the objective indicators of skin condition. A laser blood flowmeter is one of the devices for directly measuring blood flow (for example, Kashima et al., Characteristics of laser blood flowmeter, Journal of Japan Laser Medical Society, 9 , N.
o.1, 3-7 (1988)). This utilizes the phenomenon that the light scattered in the skin tissue undergoes a frequency modulation by receiving a Doppler shift by red blood cells flowing in the tissue, irradiating the skin surface with laser light through a light transmitting fiber,
A part of the light scattered in the skin tissue is received by a light receiving fiber arranged in the vicinity of the light transmitting fiber, converted into an electric signal by a photodiode, and analyzed to calculate a blood flow value.
【０００３】このレーザ血流計のプローブは皮膚に接触
する面に送光ファイバ及び受光ファイバが開口する構造
を有している。そして、プローブを皮膚に接触させたと
きの接触圧力が強過ぎると毛細血管が圧迫されて血流値
が変化するので、できるだけ接触面積が広くとられ、例
えば両面テープ等を使用して皮膚に固定される。The probe of this laser blood flow meter has a structure in which a light transmitting fiber and a light receiving fiber are opened on the surface which comes into contact with the skin. And, when the contact pressure when the probe is in contact with the skin is too strong, the capillaries are compressed and the blood flow value changes, so the contact area is as wide as possible, for example, it is fixed to the skin using double-sided tape or the like. To be done.
【０００４】[0004]
【発明が解決しようとする課題】レーザ血流計では、送
光ファイバと受光ファイバとの間隔を変えると強度分布
の状態が変化するため、測定深度を変化させることがで
きることが知られている（前掲の文献参照）。ところ
が、従来のレーザ血流計用プローブを用いて、特定の部
位について、測定深度を変化させて血流を測定するため
には、送光ファイバの開口部と受光ファイバの開口部と
の距離の異なるプローブを複数個用意し、それらを交換
しながら測定しなければならない。そうすると、プロー
ブを皮膚に装・脱着するごとに表在組織が変化したり、
毛細血管に刺激が加わって、正確な血流の測定ができな
いという問題があった。In the laser blood flowmeter, it is known that the measurement depth can be changed because the state of the intensity distribution changes when the distance between the light transmitting fiber and the light receiving fiber is changed ( (Refer to the above-mentioned literature). However, in order to measure the blood flow by changing the measurement depth for a specific site using the conventional laser blood flow probe, the distance between the opening of the light transmitting fiber and the opening of the light receiving fiber must be adjusted. It is necessary to prepare a plurality of different probes and exchange them for measurement. Then, the superficial tissue changes each time the probe is attached to and detached from the skin,
There is a problem in that the blood flow cannot be accurately measured due to the stimulation applied to the capillaries.
【０００５】したがって本発明の目的は、皮膚に装着し
たままで送光ファイバと受光ファイバとの距離を変えて
測定することのできるレーザ血流計用プローブを提供す
ることにある。Therefore, it is an object of the present invention to provide a laser blood flow probe capable of measuring the distance between the light transmitting fiber and the light receiving fiber while being worn on the skin.
【０００６】[0006]
【課題を解決するための手段】本発明によれば、少なく
とも３本の光ファイバと、測定対象に接触するための接
触面を有し、該光ファイバの開口部が該接触面内で２つ
の開口部間の距離が互いに異なって開口するように、該
光ファイバを固定する固定部材とを具備することを特徴
とするレーザ血流計用プローブが提供される。According to the present invention, at least three optical fibers and a contact surface for contacting an object to be measured are provided, and the opening of the optical fiber has two openings in the contact surface. A probe for a laser blood flowmeter is provided, which is provided with a fixing member for fixing the optical fiber so that the openings have different distances from each other.
【０００７】[0007]
【作用】例えば光ファイバの数が３であればその中から
２つを取り出す組み合わせの数は３通りである。したが
って、これら３通りの組み合わせにおける光ファイバの
開口部間の距離が互いに異なるようにすれば、これらの
中から２本の光ファイバを選び、一方が送光ファイバ、
他方が受光ファイバとなるようにレーザ血流計と接続す
ることにより、プローブを着脱することなく３通りの距
離、すなわち３通りの測定深度で血流を測定することが
できる。光ファイバの数が４であれば６通りの測定深度
について血流の測定が可能である。For example, if the number of optical fibers is 3, the number of combinations from which two are extracted is three. Therefore, if the distances between the openings of the optical fibers in these three combinations are made different from each other, two optical fibers are selected from these and one of them is the optical fiber,
By connecting the laser blood flow meter so that the other becomes a light receiving fiber, blood flow can be measured at three different distances, that is, three measurement depths, without attaching or detaching the probe. If the number of optical fibers is 4, blood flow can be measured at 6 measurement depths.
【０００８】[0008]
【実施例】図１は本発明の一実施例に係るレーザ血流計
用プローブを表わす図であり、（１）欄はその側面図、
（２）欄はその平面図である。このレーザ血流計用プロ
ーブでは、４本の光ファイバ１０，１２，１４及び１６
が樹脂１８により固められ、皮膚と接触する面２０にお
いて開口している。接触面２０における光ファイバ間の
距離は、（２）欄に示すように、光ファイバ１０と１２
の間が０．３mm、１０と１４の間が０．９mm、１０と１
６の間が１．４mm、１２と１４の間が０．７mm、１２と
１６の間が１．２mm、１４と１６の間が０．５mmであ
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a diagram showing a probe for a laser blood flow meter according to an embodiment of the present invention, column (1) is a side view thereof,
Column (2) is a plan view thereof. In this laser blood flow probe, four optical fibers 10, 12, 14 and 16 are used.
Are hardened by the resin 18 and open at the surface 20 in contact with the skin. As shown in column (2), the distance between the optical fibers 10 and 12 on the contact surface 20 is
Between 0.3mm, between 10 and 14 is 0.9mm, between 10 and 1
The distance between 6 is 1.4 mm, the distance between 12 and 14 is 0.7 mm, the distance between 12 and 16 is 1.2 mm, and the distance between 14 and 16 is 0.5 mm.
【０００９】したがって、例えば送光ファイバと受光フ
ァイバとの距離０．９mmで血流を測定したいときは、光
ファイバ１０及び１４のうち一方をレーザ血流計の送光
側に接続し、他方を受光側に接続すれば良い。距離１．
２mmで測定したいときは、光ファイバ１２及び１６のう
ち一方をレーザ血流計の送光側に接続し、他方を受光側
に接続する。このようにレーザ血流計側で光ファイバの
接続を変更するだけで送光ファイバと受光ファイバとの
距離が変更され、プローブを皮膚から着脱する必要はな
い。Therefore, for example, when it is desired to measure the blood flow at a distance of 0.9 mm between the light transmitting fiber and the light receiving fiber, one of the optical fibers 10 and 14 is connected to the light transmitting side of the laser blood flow meter, and the other is connected. It may be connected to the light receiving side. Distance 1.
When it is desired to measure at 2 mm, one of the optical fibers 12 and 16 is connected to the light transmitting side of the laser blood flow meter, and the other is connected to the light receiving side. As described above, the distance between the light transmitting fiber and the light receiving fiber is changed only by changing the connection of the optical fiber on the laser blood flow meter side, and it is not necessary to attach or detach the probe from the skin.
【００１０】[0010]
【発明の効果】以上説明したように本発明によれば、プ
ローブを皮膚から着脱することなく、送光ファイバと受
光ファイバとの距離を変えて血流の測定をすることがで
きる。As described above, according to the present invention, blood flow can be measured by changing the distance between the light transmitting fiber and the light receiving fiber without attaching or detaching the probe to or from the skin.
【図１】本発明の一実施例に係るレーザ血流計用プロー
ブを表わす図である。FIG. 1 is a diagram showing a probe for a laser blood flow meter according to an embodiment of the present invention.
１０，１２，１４，１６…光ファイバ １８…樹脂 10, 12, 14, 16 ... Optical fiber 18 ... Resin
Claims (1)
の開口部が該接触面内で２つの開口部間の距離が互いに
異なって開口するように、該光ファイバを固定する固定
部材とを具備することを特徴とするレーザ血流計用プロ
ーブ。1. An optical fiber having at least three optical fibers and a contact surface for contacting an object to be measured, the openings of the optical fibers having different distances between the two openings in the contact surface. As described above, a probe for a laser blood flow meter, comprising a fixing member for fixing the optical fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29994693A JP3290524B2 (en) | 1993-11-30 | 1993-11-30 | Laser blood flow probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29994693A JP3290524B2 (en) | 1993-11-30 | 1993-11-30 | Laser blood flow probe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07151778A true JPH07151778A (en) | 1995-06-16 |
| JP3290524B2 JP3290524B2 (en) | 2002-06-10 |
Family
ID=17878867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29994693A Expired - Fee Related JP3290524B2 (en) | 1993-11-30 | 1993-11-30 | Laser blood flow probe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3290524B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104545812A (en) * | 2014-12-30 | 2015-04-29 | 中国科学院长春光学精密机械与物理研究所 | Detection depth adjustable non-invasive detection device for human body biochemical criteria |
-
1993
- 1993-11-30 JP JP29994693A patent/JP3290524B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104545812A (en) * | 2014-12-30 | 2015-04-29 | 中国科学院长春光学精密机械与物理研究所 | Detection depth adjustable non-invasive detection device for human body biochemical criteria |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3290524B2 (en) | 2002-06-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20020212 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |