JPH07255847A - Blood vessel sensor - Google Patents
Blood vessel sensorInfo
- Publication number
- JPH07255847A JPH07255847A JP6056312A JP5631294A JPH07255847A JP H07255847 A JPH07255847 A JP H07255847A JP 6056312 A JP6056312 A JP 6056312A JP 5631294 A JP5631294 A JP 5631294A JP H07255847 A JPH07255847 A JP H07255847A
- Authority
- JP
- Japan
- Prior art keywords
- light
- blood vessel
- light receiving
- unit
- light emitting
- 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.)
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、動脈、静脈の位置を検
出するセンサに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sensor for detecting the positions of arteries and veins.
【０００２】[0002]
【従来の技術及び発明が解決すべき課題】従来から、血
液検査等のため採血を行なう場合、また、即効性を要求
される注射や点滴等は動脈あるいは静脈に注射針を挿入
して行なわれる。しかしながら、幼児、あるいは低血圧
の婦人、肥満体の人等の場合、血管の位置が分かり難い
ことが多く、経験上からの見当で注射針を刺さなければ
ならず、血管に行き当らない場合は１度ならず２度、３
度と注射針を刺し直すことがあった。このような状況は
患者に不快感を与え好ましいことではなかった。2. Description of the Related Art Conventionally, when blood is collected for a blood test or the like, and for injections or infusions which require immediate effect, an injection needle is inserted into an artery or vein. . However, in the case of infants, women with low blood pressure, obese people, etc., the position of the blood vessel is often difficult to understand, and it is necessary to pierce the injection needle from the experience and if the blood vessel cannot be reached. Not once but twice
Sometimes I had to pierce the needle again. This situation is unpleasant for the patient and is not desirable.
【０００３】本発明は上記欠点を解消するためになされ
たものであって、皮膚の上から血管の位置を検知し、動
脈注射あるいは静脈注射の際に適性な位置に注射するこ
とにより１度で注射を行なうことができ、患者に不快感
を与えることがなく、しかも体の何れの部分であっても
動脈、静脈の位置を簡単に検知できる血液センサを提供
することを目的とする。The present invention has been made in order to solve the above-mentioned drawbacks, and by detecting the position of a blood vessel on the skin and injecting it at an appropriate position during arterial injection or intravenous injection, the injection can be performed once. An object of the present invention is to provide a blood sensor that can be injected, does not cause discomfort to a patient, and can easily detect the positions of arteries and veins in any part of the body.
【０００４】[0004]
【課題を解決するための手段】上記目的を達成するた
め、本発明の血管センサは、皮膚を通して体組織及び動
脈あるいは静脈を照射する光を発光する発光部と、発光
部から照射された光が体組織及び動脈あるいは静脈で反
射される光を受光し光量に応じた電流を出力する受光部
と、電流を入力し予め入力された電流閾値と比較する測
定部と、測定部に入力される電流が閾値より小さい場合
表示する表示部とを備えたものである。In order to achieve the above object, the blood vessel sensor of the present invention comprises a light emitting section for emitting light for irradiating body tissues and arteries or veins through the skin, and light emitted from the light emitting section. A light-receiving unit that receives light reflected by body tissues and arteries or veins and outputs a current according to the amount of light, a measurement unit that inputs current and compares it with a previously input current threshold, and a current that is input to the measurement unit Is smaller than the threshold value, a display unit is provided for displaying.
【０００５】更に、好ましくは、発光部及び受光部を棒
状体の先端に備え、棒状体の他端に表示部を備えたもの
である。また、発光部及び受光部の組合せの複数を一列
に配置して設け、表示部は組合せに対応した位置に複数
設けられたものであってもよい。Further preferably, the light emitting portion and the light receiving portion are provided at the tip of the rod-shaped body, and the display portion is provided at the other end of the rod-shaped body. Further, a plurality of combinations of the light emitting unit and the light receiving unit may be arranged in a line, and the plurality of display units may be provided at positions corresponding to the combinations.
【０００６】[0006]
【作用】発光部から光を発光し動脈、静脈を照射させ
る。動脈、静脈内の血液は周囲の体組織より吸光率が高
いため、動脈、静脈に照射された光は動脈、静脈内の血
液により吸収され光量が減少して反射される。このた
め、発光部からの光が動脈、静脈に照射されると、受光
部に受光される反射光の光量は減少する。動脈、静脈以
外の体組織からの反射光が受光部に受光されたときの光
量に相当する出力を閾値として予め測定部に入力してお
き、受光部からの出力が閾値より小さいとき、表示部で
その旨を表示する。このため、動脈、静脈の位置が体の
何れの部位であっても即座にわかり、皮膚の上から血管
の位置が分かり難い人であっても、誤って注射針を刺さ
れることがなく、１度で注射を行なうことができ、患者
が不快感を感じることが激減される。[Operation] Light is emitted from the light emitting portion to illuminate the artery and vein. Since blood in arteries and veins has a higher absorptivity than surrounding body tissues, the light irradiated to the arteries and veins is absorbed by the blood in arteries and veins and the amount of light is reduced and reflected. Therefore, when the light from the light emitting unit is applied to the arteries and veins, the amount of reflected light received by the light receiving unit decreases. An output corresponding to the amount of light when reflected light from body tissues other than arteries and veins is received by the light receiving unit is input in advance to the measuring unit as a threshold value, and when the output from the light receiving unit is smaller than the threshold value, the display unit To display that fact. Therefore, even if the position of the artery or vein is immediately known in any part of the body, even if it is difficult to know the position of the blood vessel from above the skin, the injection needle will not be accidentally stabbed. Injections can be made in degrees and the patient's discomfort is greatly reduced.
【０００７】[0007]
【実施例】本発明の、血液センサを適用した一実施例を
図面を参照して説明する。図１に示すように、血液セン
サ１は棒状体であり、先端１ａに、患者の皮膚の上から
体組織Ｂ内に照射される光を発光する発光部２及び発光
部２から発光され体組織で反射された光を受光する受光
部３が設けられる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention to which a blood sensor is applied will be described with reference to the drawings. As shown in FIG. 1, the blood sensor 1 is a rod-shaped body, and the tip 1a emits light emitted from above the skin of the patient into the body tissue B and the body tissue emitted by the light emitting section 2. A light receiving unit 3 that receives the light reflected by is provided.
【０００８】発光部２は、図２に示すように、所定の波
長の光を発生する発光ダイオード（ＬＥＤ）チップ４等
を備える。ＬＥＤチップ４としては血液が６００〜９６
０ｎｍの波長を吸光するため、この範囲の波長の赤外線
を発生するものを適宜選択することができる。ＬＥＤチ
ップ４には２本の端子５が接続され、端子５はＬＥＤチ
ップ４に電流を供給する電池６（図１）に接続される。
供給電流はＬＥＤチップ４から発光する発光強度に応じ
て必要な電流が供給される。ＬＥＤチップ４から発光さ
れる光は動脈、静脈に照射されなければならないため、
末端に球状のレンズ７が設けられる。As shown in FIG. 2, the light emitting section 2 includes a light emitting diode (LED) chip 4 for generating light of a predetermined wavelength and the like. Blood is 600 to 96 for the LED chip 4.
Since it absorbs a wavelength of 0 nm, it is possible to appropriately select one that emits infrared rays having a wavelength in this range. Two terminals 5 are connected to the LED chip 4, and the terminal 5 is connected to a battery 6 (FIG. 1) that supplies a current to the LED chip 4.
As the supply current, a necessary current is supplied according to the intensity of light emitted from the LED chip 4. The light emitted from the LED chip 4 has to be applied to arteries and veins,
A spherical lens 7 is provided at the end.
【０００９】このような発光部２から発光される光が体
組織Ｂにより反射される光を受光する受光部３はフォト
ダイオードを備え、受光した光量に対応した電流を出力
する。ここで、受光部３で受光される光量は、発光部２
からの光を体組織が吸収することにより変化する。動
脈、静脈Ｖ内の血液は発光部２からの光を吸収する吸収
率が高く、受光部３で受光される光量は減少される。図
３に示すように、受光部３で受光される光量は、動脈、
静脈Ｖ内で反射された光の場合光量ａは体組織Ｂで反射
された光の場合の光量ｂより低くなる。特に、動脈の脈
拍時には動脈内の血液が増量されるため、脈拍時の動脈
で反射された光の場合光量ｃは著しく低くなる。この光
量の変化に従って受光部３から出力される電流は変化す
る。尚、毛細血管で反射された光は、毛細血管中の血液
量が少ないため吸収される光量が僅かであり、受光部の
出力を変化させることはない。このため、体組織に毛細
血管が存在しても動脈、静脈の位置と混同されることは
ない。The light receiving portion 3 for receiving the light emitted from the light emitting portion 2 and reflected by the body tissue B is equipped with a photodiode and outputs a current corresponding to the amount of the received light. Here, the amount of light received by the light receiving unit 3 depends on the light emitting unit 2
It is changed by the absorption of light from the body tissue. Blood in the arteries and veins V has a high absorption rate for absorbing the light from the light emitting unit 2, and the amount of light received by the light receiving unit 3 is reduced. As shown in FIG. 3, the amount of light received by the light receiving unit 3 is
In the case of the light reflected in the vein V, the light amount a is lower than the light amount b in the case of the light reflected by the body tissue B. In particular, since blood in the artery is increased at the time of the pulse of the artery, the light amount c of the light reflected by the artery at the time of the pulse becomes significantly low. The current output from the light receiving unit 3 changes according to the change in the light amount. The light reflected by the capillaries absorbs a small amount of light because the amount of blood in the capillaries is small, and does not change the output of the light receiving unit. Therefore, the presence of capillaries in body tissues is not confused with the positions of arteries and veins.
【００１０】更に、棒状体の血液センサ１の中央部１ｂ
は、測定者が患者の皮膚上を走査させる際に握持する部
位を構成し、中央部１ｂには受光部３からの出力を増幅
するアンプ８と、アンプ８で増幅された信号が入力され
る測定部９が備えられる。測定部９には予め、体組織で
反射される反射光量に相当する受光部３からの出力電流
（閾値）を記憶させておき、受光部３からの出力信号が
入力されると、閾値と比較し、記憶されていた閾値より
低くなった場合、表示部１０に信号を送出するようにな
っている。Further, a central portion 1b of the rod-shaped blood sensor 1 is provided.
Is a portion that the measurement person holds when scanning the patient's skin, and an amplifier 8 for amplifying the output from the light receiving portion 3 and a signal amplified by the amplifier 8 are input to the central portion 1b. The measuring unit 9 is provided. The measurement unit 9 stores in advance an output current (threshold value) from the light receiving unit 3 corresponding to the amount of reflected light reflected by the body tissue, and when an output signal from the light receiving unit 3 is input, it is compared with the threshold value. However, when it becomes lower than the stored threshold value, a signal is sent to the display unit 10.
【００１１】表示部１０は棒状体の血液センサ１の発光
部２、受光部３が設けられた先端１ａの反対側の他端１
ｃに設けられ、測定者が表示を確認しやい位置に設置さ
れる。表示部１０はランプ等を備え点灯させることによ
り表示できるものであってもよい。また、スピーカを備
え、音を発生して報知するものであってもよい。このよ
うな血管センサ１を用いて血管の位置を検出するには、
中央部１ｂを握持し血管センサ１の先端１ａを患者の体
表に当て、発光部２に電池６から電流を供給させる。発
光部２から光が発光され、体組織Ｂ内を照射して体組織
で反射され、受光部３に受光される。受光部３からの出
力が測定部９に入力される。このとき、測定者が血管セ
ンサ１を患者の体表上で移動させる。血管センサ１が動
脈、静脈上に移動されると、受光部３からの出力電流が
測定部９に予め入力されている閾値以下となり、測定部
９から表示部１０に信号が送出され、表示部１０のラン
プ等が点灯される。測定者はランプが点灯した位置に血
管があることを確認できる。The display portion 10 is the other end 1 opposite to the tip 1a provided with the light emitting portion 2 and the light receiving portion 3 of the rod-shaped blood sensor 1.
It is installed in c and is installed at a position where the measurer can easily confirm the display. The display unit 10 may include a lamp or the like and can be displayed by turning on the light. Further, a speaker may be provided and a sound may be generated to notify. To detect the position of a blood vessel using such a blood vessel sensor 1,
The central portion 1b is gripped, the tip 1a of the blood vessel sensor 1 is applied to the body surface of the patient, and the light emitting portion 2 is supplied with current from the battery 6. Light is emitted from the light emitting unit 2, illuminates the inside of the body tissue B, is reflected by the body tissue, and is received by the light receiving unit 3. The output from the light receiving unit 3 is input to the measuring unit 9. At this time, the measurer moves the blood vessel sensor 1 on the body surface of the patient. When the blood vessel sensor 1 is moved onto an artery or vein, the output current from the light receiving unit 3 becomes less than or equal to a threshold value that is input in advance to the measuring unit 9, and a signal is sent from the measuring unit 9 to the display unit 10, Ten lamps and the like are turned on. The measurer can confirm that there is a blood vessel at the position where the lamp is turned on.
【００１２】更に、測定部９に受光部３に受光された光
量ａに相当する第２の閾値を予め入力し、動脈表示部
（図示せず）を別個に設けておくことにより、測定部９
に入力された受光部３からの出力電流が第２の閾値以下
であれば、動脈表示部のランプを点灯させることにより
動脈であることも検出でき、静脈と動脈を認識すること
も可能である。Further, a second threshold value corresponding to the amount of light a received by the light receiving section 3 is previously input to the measuring section 9 and an arterial display section (not shown) is separately provided, so that the measuring section 9 is provided.
If the output current from the light-receiving unit 3 input to is equal to or less than the second threshold value, it can be detected that it is an artery by lighting the lamp of the artery display unit, and the vein and the artery can be recognized. .
【００１３】血管の位置が検出されれば、ヨードチンキ
等の有色の消毒液等でその位置をマークし、注射を行な
う。このように、血管の位置が確認された後、注射をす
ることにより、確実に血管に注射をすることができ、患
者に不快感を与えることはない。更に、本発明の他の実
施例として、図４に示すように、腕章式血液センサ１１
であってもよい。腕章式血液センサ１１は腕Ｂ1等を挿
入するようにできるものでも、また、腕Ｂ1等に当てる
ようなものであっもよく、発光部２及び受光部３を１組
としてこの組合せた発光部２及び受光部３を所定間隔で
一列に配置して設けたものである。更に、この組合せた
発光部２及び受光部３に対応して図示しないアンプ、測
定部がそれぞれ設けられ、各測定部からの出力により表
示が行なわれる表示部１０が発光部２及び受光部３の設
置位置と一致した位置に設けられる。また、各受光部３
のからの出力を１のアンプ、及び１の測定部で図示しな
い制御装置により処理し該当する受光部３に対応する表
示部１０で表示させるようにしてもよい。尚、腕章式血
液センサ１１の表示部１０はランプとする。When the position of the blood vessel is detected, the position is marked with a colored antiseptic solution such as tincture of iodine and injection is performed. In this way, by injecting after confirming the position of the blood vessel, the blood vessel can be surely injected, and the patient is not uncomfortable. Furthermore, as another embodiment of the present invention, as shown in FIG.
May be The armband blood sensor 11 may be one in which the arm B 1 or the like can be inserted, or may be one in which it is applied to the arm B 1 or the like. The section 2 and the light receiving section 3 are arranged in a line at a predetermined interval. Further, an amplifier and a measuring unit, which are not shown, are provided corresponding to the combined light emitting unit 2 and light receiving unit 3, respectively, and the display unit 10 for displaying by the output from each measuring unit is the light emitting unit 2 and the light receiving unit 3. It is provided at a position that matches the installation position. In addition, each light receiving unit 3
The output from 1 may be processed by a control device (not shown) by one amplifier and one measuring unit and displayed on the display unit 10 corresponding to the corresponding light receiving unit 3. The display unit 10 of the armband blood sensor 11 is a lamp.
【００１４】腕章式血液センサ１１を皮膚に当てあるい
は腕等にはめると、動脈、静脈上に位置する受光部３に
受光される光量が減少する。そのため、その位置の表示
部１０のランプが点灯し、血管の位置が検知される。血
管の位置が検知されれば、前述のようにマークをし、確
実に注射をすることができる。以上の説明は本発明の一
実施例であって、本発明はこれに限定されず、発光ダイ
オードとフォトダイオードからなる発光部、受光部のみ
に限定されるものではなく、公知の光センサ等を使用で
きる。また、電池で駆動されるものに限定されるもので
もなく、リード線で商用電源に接続するものであっても
よい。When the armband blood sensor 11 is applied to the skin or attached to the arm or the like, the amount of light received by the light receiving portion 3 located on the artery or vein decreases. Therefore, the lamp of the display unit 10 at that position is turned on, and the position of the blood vessel is detected. If the position of the blood vessel is detected, the mark can be made as described above and the injection can be reliably performed. The above description is one embodiment of the present invention, and the present invention is not limited to this, and is not limited to the light emitting portion and the light receiving portion including the light emitting diode and the photodiode, and a known optical sensor or the like may be used. Can be used. Further, the battery is not limited to being driven by a battery, and may be connected to a commercial power source by a lead wire.
【００１５】[0015]
【発明の効果】以上の説明からも明らかなように、本発
明の血管センサによれば、発光部、受光部を備え、動
脈、静脈中の血液の吸光率が他の体組織の吸光率より大
きいことから、動脈、静脈の位置が表示部に表示され、
測定者は血管の位置が皮膚上から見分け難い人であって
も短時間で簡単に動脈、静脈の位置を知ることができ
る。そのため、注射をする際、何度も注射針を刺し直す
ことをせず、１度で確実に注射を行なうことができ、患
者に不快感を与えることがない。As is apparent from the above description, according to the blood vessel sensor of the present invention, the light emitting portion and the light receiving portion are provided, and the absorptivity of blood in arteries and veins is higher than that of other body tissues. Since it is large, the positions of arteries and veins are displayed on the display,
The measurer can easily know the positions of arteries and veins in a short time even if the position of the blood vessel is difficult to distinguish from the skin. Therefore, when the injection is performed, it is possible to surely perform the injection at one time without repeatedly puncturing the injection needle, and the patient is not uncomfortable.
【図１】本発明の一実施例を示す構成図。FIG. 1 is a configuration diagram showing an embodiment of the present invention.
【図２】図１に示す実施例の要部を示す図。FIG. 2 is a diagram showing a main part of the embodiment shown in FIG.
【図３】受光部に受光される光量の変化を示す図。FIG. 3 is a diagram showing changes in the amount of light received by a light receiving section.
【図４】他の実施例を示す構成図。FIG. 4 is a configuration diagram showing another embodiment.
１、１１‥‥‥血液センサ １ａ‥‥‥先端 １ｃ‥‥‥他端 ２‥‥‥発光部 ３‥‥‥受光部 ９‥‥‥測定部 １０‥‥‥表示部 Ｂ‥‥‥体組織 Ｖ‥‥‥動脈、静脈 1, 11 ... Blood sensor 1a ... Tip 1c ... ... Other end 2 ... Light-emitting part 3 ... Light-receiving part 9 ... Measuring part 10 ... Display part B ... ... Body tissue V ‥‥‥ Arteries and veins
───────────────────────────────────────────────────── フロントページの続き (72)発明者 鈴木 正則 東京都新宿区西新宿８丁目20番２号 ジァ ム販売株式会社内 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Masanori Suzuki 8-20-2 Nishishinjuku, Shinjuku-ku, Tokyo Jam Sales Co., Ltd.
Claims (3)
を照射する光を発光する発光部と、前記発光部から照射
された光が前記体組織及び動脈あるいは静脈で反射され
る光を受光し光量に応じた電流を出力する受光部と、前
記電流を入力し予め入力された電流閾値と比較する測定
部と、前記測定部に入力される電流が前記閾値より小さ
い場合表示する表示部とを備えたことを特徴とする血管
センサ。1. A light emitting portion that emits light for irradiating body tissues and arteries or veins through the skin, and light emitted from the light emitting portion that is reflected by the body tissues and arteries or veins to obtain a light amount. A light receiving unit that outputs a corresponding current, a measuring unit that inputs the current and compares it with a previously input current threshold value, and a display unit that displays when the current input to the measuring unit is smaller than the threshold value A blood vessel sensor characterized by the above.
に備え、前記棒状体の他端に前記表示部を備えたことを
特徴とする請求項１記載の血管センサ。2. The blood vessel sensor according to claim 1, wherein the light emitting portion and the light receiving portion are provided at the tip of a rod-shaped body, and the display portion is provided at the other end of the rod-shaped body.
を一列に配置して設け、前記表示部は前記組合せに対応
した位置に複数設けられたことを特徴とする請求項１記
載の血管センサ。3. The blood vessel according to claim 1, wherein a plurality of combinations of the light emitting unit and the light receiving unit are arranged in a line, and a plurality of the display units are provided at positions corresponding to the combination. Sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6056312A JPH07255847A (en) | 1994-03-25 | 1994-03-25 | Blood vessel sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6056312A JPH07255847A (en) | 1994-03-25 | 1994-03-25 | Blood vessel sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07255847A true JPH07255847A (en) | 1995-10-09 |
Family
ID=13023643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6056312A Pending JPH07255847A (en) | 1994-03-25 | 1994-03-25 | Blood vessel sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07255847A (en) |
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- 1994-03-25 JP JP6056312A patent/JPH07255847A/en active Pending
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