JPS63212329A - Blood flowmeter - Google Patents
Blood flowmeterInfo
- Publication number
- JPS63212329A JPS63212329A JP62046348A JP4634887A JPS63212329A JP S63212329 A JPS63212329 A JP S63212329A JP 62046348 A JP62046348 A JP 62046348A JP 4634887 A JP4634887 A JP 4634887A JP S63212329 A JPS63212329 A JP S63212329A
- Authority
- JP
- Japan
- Prior art keywords
- light
- optical fibers
- blood flow
- optical fiber
- receiving optical
- 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.)
- Pending
Links
- 239000008280 blood Substances 0.000 title 1
- 210000004369 blood Anatomy 0.000 title 1
- 239000013307 optical fiber Substances 0.000 claims description 34
- 238000005259 measurement Methods 0.000 claims description 15
- 239000000523 sample Substances 0.000 claims description 14
- 230000017531 blood circulation Effects 0.000 claims description 12
- 230000003287 optical effect Effects 0.000 claims description 11
- 210000004204 blood vessel Anatomy 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000003743 erythrocyte Anatomy 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Landscapes
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、レーザー光を被検体に投射し、被検体の血管
内の赤血球からの散乱光を受光し、血流状態を計測をす
る血流計に関するものである。Detailed Description of the Invention [Industrial Field of Application] The present invention is a method for measuring the state of blood flow by projecting laser light onto a subject and receiving scattered light from red blood cells in the blood vessels of the subject. It is related to flow meters.
［従来の技術］
従来、この種の装置は被検体に対する測定個所が１個所
に限定されており、例えば２個所の測定を同時に行うに
は２台の血流計が必要であった。[Prior Art] Conventionally, this type of device has been limited to a single measurement location on a subject, and for example, two blood flow meters were required to measure two locations simultaneously.
２個所の部位の海流を計測する場合に、別個のレーザー
光源を使用すると、レーザー光の波長によって得られる
レーザードツプラ信号が変化し、特に半導体レーザーを
使用する場合にはばらつく可能性が大きい。When measuring ocean currents at two locations, if separate laser light sources are used, the laser Doppler signal obtained will change depending on the wavelength of the laser light, and there is a large possibility that it will vary, especially if a semiconductor laser is used.
［発明の目的］
本発明の目的は、同一のレーザー光源から複数本の光フ
ァイバを引き出すことにより、同時に２個所の血流計測
を可能にした血流計を提供することにある。[Object of the Invention] An object of the present invention is to provide a blood flow meter that can simultaneously measure blood flow at two locations by drawing out a plurality of optical fibers from the same laser light source.
［発明の概要］
上述の目的を達成するための本発明の要旨は、少なくと
も２個の測定プローブを有し、各測定プローブには一対
の投光用光ファイバと受光用光ファイバの先端部を取り
付けＪ各測定プローブの投光用光ファイバは同一のレー
ザー光源から分岐して接続し、各測定プローブの受光用
光ファイバにはそれぞれ光検出器を接続したことを特徴
とする血流計である。[Summary of the Invention] The gist of the present invention for achieving the above-mentioned object is to have at least two measurement probes, each measurement probe having a pair of optical fibers for transmitting light and optical fibers for receiving light. Installation J A blood flow meter characterized in that the light emitting optical fibers of each measurement probe are branched from the same laser light source and connected, and a photodetector is connected to the light receiving optical fiber of each measurement probe. .
［発明の実施例］ 本発明を図示の実施例に基づいて詳細に説明する。[Embodiments of the invention] The present invention will be explained in detail based on illustrated embodiments.
第１図において、ｌはレーザー光源であり、このレーザ
ー光源ｌの出射側には２個のレンズ２ａ、２ｂを有する
例えば分布屈折率型のレンズ２が配置され、これらのレ
ンズ２ａ、２ｂの焦点位置に２木の投光用光ファイバ３
ａ、３ｂの端部がそれぞれ配置されている。投光用光フ
ァイバ３ａ、３ｂの他端部は本体パネル４に取り付けら
れた光コネクタ５内において、それぞれ投光用光ファイ
バ６ａ、６ｂに接合され、これらの投光用光ファイバ６
ａ、６ｂの他端部は被検体に向けられている。また、こ
れらの投光用光ファイバ６ａ、６ｂに沿って受光用光フ
ァイバ７ａ、７ｂがそれぞれ配置されており、受光用光
ファイバ７ａの受光端は投光用光ファイバ６ａの出射端
とプローブ８ａ内において、また受光用光ファイバ７ｂ
の受光端は投光用光ファイバ６ｂの出射端とプローブ８
ｂ内いおいてそれぞれ並列されている。受光用光ファイ
バ７ａ、７ｂの他端部は光コネクタ５において、それぞ
れ受光用光ファイバ９ａ、９ｂに接続され、更に受光用
光ファイバ９ａ、９ｂの他端部にはそれぞれ光検出器１
０ａ、１０ｂが接続されている。なお、光コネクタ５に
より投光用光ファイバ３ａ、３ｂと６ａ、６ｂ、及び受
光用光ファイバ７ａ、７ｂと９ａ、９ｂは分離し得るよ
うになっている。In FIG. 1, l is a laser light source, and on the emission side of this laser light source l, for example, a distributed index type lens 2 having two lenses 2a and 2b is arranged, and the focal point of these lenses 2a and 2b is 2 optical fibers for light projection 3 in position
The ends of a and 3b are respectively arranged. The other ends of the light emitting optical fibers 3a and 3b are connected to the light emitting optical fibers 6a and 6b, respectively, in an optical connector 5 attached to the main body panel 4.
The other ends of a and 6b are directed toward the subject. Further, light receiving optical fibers 7a and 7b are arranged along these light projecting optical fibers 6a and 6b, respectively, and the light receiving end of the light receiving optical fiber 7a is connected to the output end of the light projecting optical fiber 6a and the probe 8a. Inside, the light-receiving optical fiber 7b
The light-receiving end of
They are arranged in parallel within b. The other ends of the light-receiving optical fibers 7a and 7b are connected to the light-receiving optical fibers 9a and 9b, respectively, in the optical connector 5, and the other ends of the light-receiving optical fibers 9a and 9b are connected to a photodetector 1, respectively.
0a and 10b are connected. Note that the optical connector 5 allows the light emitting optical fibers 3a, 3b and 6a, 6b and the light receiving optical fibers 7a, 7b and 9a, 9b to be separated.
レーザー光源ｌからの光はレンズ２で２つの投光用光フ
ァイバ３ａ、３ｂのコア部に効率良く結像される。投光
用光ファイバ３ａ、３ｂは光コネクタ５を介してその出
射光をそれぞれ投光用光ファイバ６ａ、６ｂに伝達し、
プローブ８ａ、８ｂのそれぞれから方向の異なる２つの
光束り。The light from the laser light source 1 is efficiently imaged by the lens 2 onto the core portions of the two light projecting optical fibers 3a and 3b. The light projection optical fibers 3a and 3b transmit the emitted light to the light projection optical fibers 6a and 6b, respectively, via the optical connector 5,
Two beams of light in different directions from each of the probes 8a and 8b.
を被検体に向けて出射する。そして、被検体で反射し受
光用光ファイバ７ａ、７ｂに入射したレーザードツプラ
光信号Ｌｉは、光コネクタ５、受光用光ファイバ９ａ、
９ｂを介して光検出器１０ａ、１０ｂへと導光される。is emitted toward the subject. The laser Doppler optical signal Li reflected by the object and incident on the light-receiving optical fibers 7a, 7b is transmitted to the optical connector 5, the light-receiving optical fiber 9a,
The light is guided to photodetectors 10a and 10b via 9b.
このとき、受光用光ファイバ７ａ、７ｂのコア径よりも
受光用光ファイバ９ａ、９ｂのコア径を大きくしておく
と、接続の測光効率が高くなる利点がある。At this time, if the core diameter of the light-receiving optical fibers 9a, 9b is made larger than the core diameter of the light-receiving optical fibers 7a, 7b, there is an advantage that the photometric efficiency of the connection becomes higher.
また、測定プローブ８ａ、８ｂを２個使用した場合に、
光コネクタを２個用いると接続の手間が掛かるため、実
施例のように多芯の１個の光コネクタ５を使用すると、
測定プローブ８ａ、８ｂを本体パネル４に接続する際の
手間が省け、安定的な複数個所の血流計測が可能となる
。Also, when two measurement probes 8a and 8b are used,
If two optical connectors are used, it will take time to connect, so if one multi-core optical connector 5 is used as in the embodiment,
The effort required to connect the measurement probes 8a, 8b to the main body panel 4 can be saved, and stable blood flow measurement at multiple locations can be performed.
［発明の効果］
以上説明したように本発明に係る血流計は、同一のレー
ザー光源を使用することにより同一波長のレーザー光を
使用できるので、複数の血流計測を同一条件として実施
することができる。[Effects of the Invention] As explained above, the blood flow meter according to the present invention can use laser light of the same wavelength by using the same laser light source, so multiple blood flow measurements can be performed under the same conditions. Can be done.
図面第１図は本発明に係る血流計の一実施例を示す構成
図である。
符号１はレーザー光源、２はレンズ、３ａ、３ｂ、６ａ
、６ｂは投光用光ファイバ、４はパネル、５は光コネク
タ、７ａ、７ｂ、９ａ、９ｂは受光用光ファイバ、８ａ
、８ｂは測定プローブ、１０ａ、ｆｏｂは光検出器であ
る。FIG. 1 is a block diagram showing an embodiment of a blood flow meter according to the present invention. Code 1 is a laser light source, 2 is a lens, 3a, 3b, 6a
, 6b is a light emitting optical fiber, 4 is a panel, 5 is an optical connector, 7a, 7b, 9a, 9b is a light receiving optical fiber, 8a
, 8b is a measurement probe, and 10a and fob are photodetectors.
Claims (1)
ーブには一対の投光用光ファイバと受光用光ファイバの
先端部を取り付け、各測定プローブの投光用光ファイバ
は同一のレーザー光源から分岐して接続し、各測定プロ
ーブの受光用光ファイバにはそれぞれ光検出器を接続し
たことを特徴とする血流計。 ２、前記光ファイバはそれぞれ中間で光コネクタを用い
て接続するようにした特許請求の範囲第１項に記載の血
流計。 ３、前記測定プローブ内の受光用光ファイバのコア径は
、前記光コネクタで接続した前記光検出器側の受光用光
ファイバのコア径よりも小さくした特許請求の範囲第２
項に記載の血流計。[Scope of Claims] 1. At least two measurement probes are provided, each measurement probe has a pair of light emitting optical fibers and a light receiving optical fiber attached to the tips thereof, and each measurement probe has a pair of light emitting optical fibers. A blood flow meter characterized in that the laser light source is branched and connected from the same laser light source, and a photodetector is connected to the light receiving optical fiber of each measurement probe. 2. The blood flow meter according to claim 1, wherein each of the optical fibers is connected using an optical connector in the middle. 3. The core diameter of the light-receiving optical fiber in the measurement probe is smaller than the core diameter of the light-receiving optical fiber on the photodetector side connected by the optical connector.
Blood flow meter described in section.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62046348A JPS63212329A (en) | 1987-02-28 | 1987-02-28 | Blood flowmeter |
| DE8888104657T DE3865335D1 (en) | 1987-02-28 | 1988-03-23 | SHEET FEEDER. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62046348A JPS63212329A (en) | 1987-02-28 | 1987-02-28 | Blood flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63212329A true JPS63212329A (en) | 1988-09-05 |
Family
ID=12744636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62046348A Pending JPS63212329A (en) | 1987-02-28 | 1987-02-28 | Blood flowmeter |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS63212329A (en) |
| DE (1) | DE3865335D1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10508763A (en) * | 1994-05-31 | 1998-09-02 | アブラハム マエブスキー | Tissue monitoring device |
-
1987
- 1987-02-28 JP JP62046348A patent/JPS63212329A/en active Pending
-
1988
- 1988-03-23 DE DE8888104657T patent/DE3865335D1/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10508763A (en) * | 1994-05-31 | 1998-09-02 | アブラハム マエブスキー | Tissue monitoring device |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3865335D1 (en) | 1991-11-14 |
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