JP3290524B2 - Laser blood flow probe - Google Patents
Laser blood flow probeInfo
- Publication number
- JP3290524B2 JP3290524B2 JP29994693A JP29994693A JP3290524B2 JP 3290524 B2 JP3290524 B2 JP 3290524B2 JP 29994693 A JP29994693 A JP 29994693A JP 29994693 A JP29994693 A JP 29994693A JP 3290524 B2 JP3290524 B2 JP 3290524B2
- Authority
- JP
- Japan
- Prior art keywords
- blood flow
- probe
- flow meter
- laser blood
- optical fibers
- 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.)
- Expired - Fee Related
Links
Landscapes
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
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 for non-invasively measuring 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 objective indicators of skin condition. As one of the devices for directly measuring blood flow, there is a laser blood flow meter (for example, Kashima et al., Characteristics of Laser Blood Flow Meter, Journal of Laser Society of Japan, 9 , N
o.1, 3-7 (1988)). This utilizes the phenomenon that the light scattered in the skin tissue undergoes Doppler shift and frequency modulation by red blood cells flowing in the tissue, and irradiates the skin surface with a laser beam through a light transmission fiber,
A part of the light scattered in the skin tissue is received by a light-receiving fiber arranged near 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。[0003] The probe of the laser blood flow meter has a structure in which a light transmitting fiber and a light receiving fiber are opened on a surface that comes into contact with the skin. And if the contact pressure when the probe is brought into contact with the skin is too strong, the blood vessels will be compressed and the blood flow value will change. Is 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。It is known that in a laser blood flow meter, the depth of measurement can be changed because the state of the intensity distribution changes when the distance between the transmitting fiber and the receiving fiber changes. See the literature cited above). However, in order to measure the blood flow by changing the measurement depth at a specific site using a conventional laser blood flow meter probe, the distance between the opening of the light transmitting fiber and the opening of the light receiving fiber must be measured. It is necessary to prepare a plurality of different probes and measure them while exchanging them. Then, every time the probe is attached to or detached from the skin, the superficial tissue changes,
There is a problem that accurate blood flow measurement cannot be performed due to 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。Accordingly, it is an object of the present invention to provide a laser blood flow meter probe which can measure while changing the distance between a light transmitting fiber and a light receiving fiber while being attached to 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, there is provided at least three optical fibers and a contact surface for contacting an object to be measured, and an opening of the optical fiber has two openings in the contact surface. A fixing member for fixing the optical fiber so that the distances between the openings are different from each other, and a probe for a laser blood flow meter is provided.
【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 three, the number of combinations for taking two out of them is three. Therefore, if the distances between the openings of the optical fibers in these three combinations are different from each other, two optical fibers are selected from these, and one is a transmission fiber,
By connecting to a laser blood flow meter so that the other becomes a light receiving fiber, the blood flow can be measured at three different distances, that is, at three different measurement depths, without attaching / detaching the probe. If the number of optical fibers is 4, blood flow can be measured at six 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。FIG. 1 is a view showing a probe for a laser blood flow meter according to one embodiment of the present invention.
Column (2) is a plan view thereof. In this laser blood flow meter probe, four optical fibers 10, 12, 14, and 16 are used.
Are solidified by the resin 18 and open at the surface 20 that comes into contact with the skin. The distance between the optical fibers at the contact surface 20 is, as shown in column (2), the optical fibers 10 and 12.
0.3 mm between 10 and 0.9 between 10 and 14
6 is 1.4 mm, 12 and 14 are 0.7 mm, 12 and 16 are 1.2 mm, and 14 and 16 are 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. What is necessary is just to connect to a light-receiving side. Distance 1.
When measuring 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. Thus, only by changing the connection of the optical fiber on the laser blood flow meter side, the distance between the light transmitting fiber and the light receiving fiber is changed, and it is not necessary to attach and 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, the blood flow can be measured by changing the distance between the light transmitting fiber and the light receiving fiber without removing the probe 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 view showing a laser blood flow meter probe 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
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) A61B 5/02 - 5/03 G01P 5/00 ──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int.Cl. 7 , DB name) A61B 5/02-5/03 G01P 5/00
Claims (4)
な少なくとも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。1. Can be used for both light transmission and light reception
At least three optical fibers, and a contact surface for contacting the measurement object, such that the opening of the optical fiber is opened in the contact surface with the distance between the two openings different from each other. And a fixing member for fixing the optical fiber.
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２次元的な拡
がりを有する配置で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。2. An optical fiber comprising: at least three optical fibers; and a contact surface for contacting an object to be measured, wherein the openings of the optical fibers are different in distance from each other in the contact surface. So that the optical fiber is two-dimensionally expanded.
A fixing member for fixing the probe in an arrangement having a beam.
としても使用可能である請求項２記載のレーザ血流計用3. The laser blood flow meter according to claim 2, which can be used as a laser blood flow meter.
プローブ。probe.
請求項１〜３のいずれか１項に記載のレーザ血流計用プA laser blood flow meter probe according to claim 1.
ローブ。Robe.
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 JPH07151778A (en) | 1995-06-16 |
| JP3290524B2 true 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) |
Families Citing this family (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
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07151778A (en) | 1995-06-16 |
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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 |