JPH10155776A - Blood sugar gauge - Google Patents

Blood sugar gauge

Info

Publication number
JPH10155776A
JPH10155776A JP32376696A JP32376696A JPH10155776A JP H10155776 A JPH10155776 A JP H10155776A JP 32376696 A JP32376696 A JP 32376696A JP 32376696 A JP32376696 A JP 32376696A JP H10155776 A JPH10155776 A JP H10155776A
Authority
JP
Japan
Prior art keywords
light
blood glucose
blood sugar
optical filter
emitting element
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
Application number
JP32376696A
Other languages
Japanese (ja)
Other versions
JP3521662B2 (en
Inventor
Taketoshi Sato
武年 佐藤
Masayo Haji
雅代 土師
Shunichi Nagamoto
俊一 長本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP32376696A priority Critical patent/JP3521662B2/en
Publication of JPH10155776A publication Critical patent/JPH10155776A/en
Application granted granted Critical
Publication of JP3521662B2 publication Critical patent/JP3521662B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Investigating Or Analysing Biological Materials (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)

Abstract

PROBLEM TO BE SOLVED: To accurately measure a blood sugar value by reducing effects due to a temperature variation of a human body by a method wherein a light being cast by a light emitting element, which is from a visible light zone to an infrared light zone, is cast on a finger tip, and the light which has passed through the finger tip is passed to an optical filter to make a specified waveband, and then, a blood sugar value is operated and displayed. SOLUTION: In a probe 1 in which a finger tip is inserted, a light emitting element 2, a light receiving element 3, and an optical filter 4 are arranged, and the light emitting element 2 is made to emit a light of a wide wavelength from a visible light zone to an infrared light zone. The light which is emitted by the light emitting element 2 passes through the inserted finger tip, and at the optical filter 4, only a specified waveband is selected, and the light is received by the light receiving element 3. The light received by the light receiving element 3 is amplified by an amplifier 6, and transmitted to a wave form processing means 7. A wave form blood sugar value related means 9 which is connected to the wave form processing means 7, operates a blood sugar value by the data indicating the luminous energy which is processed by the wave form processing means 7, and a present blood sugar value is displayed on a blood sugar value display means 10.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、血液中の糖分を測
定する血糖計に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blood glucose meter for measuring sugar in blood.

【0002】[0002]

【従来の技術】従来、血糖値は健康診断の際の採血血液
によって測定している。しかしこの方法は、個々の測定
毎に比較的多量の血液を必要とし、かなりの苦痛を伴う
ものである。この問題を解決するために発明者らは、発
光素子と受光素子とを使用して、人体を通過した発光素
子が発生した光を波形処理手段によって処理し、少量の
血液を使用して予め求めた定数を使用して、簡単に血糖
値を検査できる血糖計を提案しているものである。
2. Description of the Related Art Conventionally, a blood sugar level is measured by collecting blood at the time of a health examination. However, this method requires a relatively large amount of blood for each individual measurement and is quite painful. In order to solve this problem, the inventors use a light emitting element and a light receiving element to process light generated by the light emitting element that has passed through the human body by waveform processing means, and obtain in advance using a small amount of blood. It proposes a blood glucose meter that can easily test a blood glucose level by using the obtained constant.

【0003】[0003]

【発明が解決しようとする課題】しかし、前記血糖計に
よる測定は、人体の温度変化による影響が大きく、正確
な測定が困難であるという課題を有しているものであ
る。
However, the measurement by the blood glucose meter has a problem that it is difficult to perform an accurate measurement due to a large influence of a temperature change of a human body.

【0004】[0004]

【課題を解決するための手段】本発明は、光学的フィル
タによって、発光素子が発光した光の内の特定波長帯を
選択的に透過させ、これを受光素子・波形処理手段によ
って処理することによって人体の温度変化による影響を
少なくした血糖計としている。
According to the present invention, a specific wavelength band of light emitted from a light emitting element is selectively transmitted by an optical filter, and the light is selectively processed by a light receiving element and waveform processing means. The blood glucose meter is less affected by temperature changes in the human body.

【0005】[0005]

【発明の実施の形態】請求項1に記載した発明は、発光
素子が放射する可視光域から赤外光域までの光を指先に
当て、指先を透過して光を更に光学的フィルタを透過さ
せて特定波長帯のものとし、波形処理手段・血糖値入力
手段・波形血糖値関連手段を使用して現在の血糖値を演
算表示し、温度による影響の少ない血糖計としている。
According to the first aspect of the present invention, light from a visible light range to an infrared light range emitted from a light emitting element is applied to a fingertip, transmitted through the fingertip, and further transmitted through an optical filter. Then, the current blood glucose level is calculated and displayed using the waveform processing means, the blood glucose level inputting means, and the waveform blood glucose level-related means, so that the blood glucose meter is less affected by temperature.

【0006】請求項2に記載した発明は、光学的フィル
タが透過する波長帯を1789nmを含んだものとして、血糖
値の主体であるグリコース糖による吸収を精度良く検知
できる血糖計としている。
[0006] The invention described in claim 2 is a blood glucose meter which can accurately detect absorption by glucose, which is a main component of the blood glucose level, assuming that the wavelength band transmitted by the optical filter includes 1789 nm.

【0007】[0007]

【実施例】以下本発明の実施例について図1を参照しな
がら説明する。図1は本実施例の構成を説明するブロッ
ク図である。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. FIG. 1 is a block diagram illustrating the configuration of the present embodiment.

【0008】指先を挿入するプロープ1内に、発光素子
2・受光素子3・光学的フィルタ4を配置している。発
光素子2は、発光電源5からの電源の供給を受けて、可
視光域から赤外光域までの幅広い波長の光を発光してい
る。発光素子2が発光した光は、挿入した指先を透過
し、光学的フィルタ4によって更に特定波長帯だけを選
択されて、受光素子3によって受光される。受光素子3
が受光した光は、増幅器6によって増幅され、波形処理
手段7に伝達される。また波形処理手段7には、波形血
糖値関連手段9が接続されている。波形血糖値関連手段
9は、波形処理手段7が処理した光量を示すデータから
血糖値を演算して、血糖値表示手段10に現在の血糖値
を表示するものである。
A light emitting element 2, a light receiving element 3, and an optical filter 4 are arranged in a probe 1 into which a fingertip is inserted. The light emitting element 2 emits light having a wide wavelength range from a visible light region to an infrared light region when supplied with power from the light emitting power supply 5. The light emitted by the light emitting element 2 passes through the inserted fingertip, and only a specific wavelength band is further selected by the optical filter 4 and received by the light receiving element 3. Light receiving element 3
Are amplified by the amplifier 6 and transmitted to the waveform processing means 7. The waveform processing means 7 is connected to a waveform blood sugar level related means 9. The waveform blood sugar level-related means 9 calculates the blood sugar level from the data indicating the light amount processed by the waveform processing means 7 and displays the current blood sugar level on the blood sugar level display means 10.

【0009】以下本実施例の動作について説明する。図
示していないスイッチをオンすると、発光電源5が発光
素子2に電源を供給して、発光素子2から広帯域の光が
指先に照射される。この指先を透過した光は、光学的フ
ィルタ4によって特定波長の光成分だけとなって、受光
素子4によって受光される。
The operation of this embodiment will be described below. When a switch (not shown) is turned on, the light-emitting power supply 5 supplies power to the light-emitting element 2 and the light-emitting element 2 irradiates a finger with a broadband light. The light transmitted through the fingertip becomes only a light component of a specific wavelength by the optical filter 4 and is received by the light receiving element 4.

【0010】図2は、血液の吸光度特性を示す特性図
で、横軸は波長を、縦軸は吸光度、つまり発光素子2が
発生した光が組織や血液によって吸光され減衰する度合
いを示している。図中のイ・ロは、血液の血糖値を示し
ており、ロはイよりも血糖値が低くなっている。図2か
ら判るように、一般に血液中の血糖値が高くなると、全
体に吸光度は高くなる方向に平行移動するものである。
例えば波長λ1においては、イの吸光度はA2であり、ロ
の吸光度はA1となっている。
FIG. 2 is a characteristic diagram showing the absorbance characteristics of blood, in which the horizontal axis represents wavelength and the vertical axis represents absorbance, that is, the degree to which light generated by the light emitting element 2 is absorbed and attenuated by tissues and blood. . In the figure, a and b show the blood sugar level of blood, and b has a lower blood sugar level than a. As can be seen from FIG. 2, generally, when the blood glucose level in the blood increases, the absorbance generally moves in a direction in which the absorbance increases.
For example, at the wavelength λ 1 , the absorbance of A is A 2 and the absorbance of B is A 1 .

【0011】また図3は、温度が変わった場合の血液の
吸光度特性を示している。同様に横軸は波長を、縦軸は
吸光度を示している。ハ・ニは同一の血糖値のものを温
度を変えて測定した結果を示しており、ニはハの場合よ
りも低い温度となっている。発明者らは、この実験によ
って、温度が変わっても吸光度A3が不変である波長λ3
の存在を発見したものである。すなわち、波長λ3では
ハのものもニのものも吸光度は同一の値A3となってい
るものである。また波長λ3を越えると、吸光度の関係
が逆転し、ハのものの吸光度が低くなり、ニのものの吸
光度は大きくなっている。
FIG. 3 shows the absorbance characteristics of blood when the temperature changes. Similarly, the horizontal axis represents wavelength, and the vertical axis represents absorbance. Ha and Ni show the results of measurement of the same blood sugar level at different temperatures, and the temperature of Ni is lower than that of Ha. By this experiment, the inventors found that the wavelength λ 3 at which the absorbance A 3 did not change even when the temperature changed.
The discovery of the existence of. That is, at wavelength λ 3 , the absorbance of both C and D has the same value A 3 . Also when it exceeds the wavelength lambda 3, the relationship of absorbance reverses, the lower the absorbance ones Ha, the absorbance of those two is larger.

【0012】本実施例で使用している光学的フィルタ4
は、前記波長波長λ3を含む波長λ1から波長λの間の光
だけを選択的に透過する特性に設定しているものであ
る。従ってプローブ1に指を挿入すると、発光素子2が
発生した光は指先の組織や血液によって吸収され、更に
光学的フィルタ4によって波長λ1から波長λ2の間の光
だけとなって、受光素子3に受光されるものである。図
4は、このときの受光素子3の受光特性を示している。
受光素子3が受光する光は、光学的フィルタ4によって
波長λ3を含む波長λ1から波長λ2ものとなっている。
波長λ3の光の吸光度は前記したように温度による影響
を受けないものである。つまり、ハに示している温度が
高い状態での吸光特性と、ニに示している温度低い状態
での吸光特性のものも、波長λ3においては同一の吸光
度となっているものである。
Optical filter 4 used in this embodiment
Are those set selectively transmitting properties only light between wavelengths lambda the wavelength lambda 1 that includes the wavelength wavelength lambda 3. Therefore, when a finger is inserted into the probe 1, the light generated by the light emitting element 2 is absorbed by the tissue or blood at the fingertip, and is further converted into only light between the wavelengths λ 1 and λ 2 by the optical filter 4. 3 is received. FIG. 4 shows the light receiving characteristics of the light receiving element 3 at this time.
The light received by the light receiving element 3 is changed from the wavelength λ 1 including the wavelength λ 3 to the wavelength λ 2 by the optical filter 4.
As described above, the absorbance of the light having the wavelength λ3 is not affected by the temperature. That is, the absorption characteristics in a state temperature is high to indicate the Ha, others of absorption characteristics at a lower temperature condition, which shows the two, but that is the same absorbance at the wavelength lambda 3.

【0013】実際の測定は波長λ3の一点では不可能で
あり、波長λ3を含む波長λ1から波長λ2の範囲での受
光素子3が受ける光量によって判断しているものであ
る。この光量は、ハの温度の場合には、図4に示す点A
4・A3・A9・A7・A10・A4で囲まれた面積S1に相当
する。またニの温度の場合には、図4に示す点A5・A 3
・A9・A6・A10・A5で囲まれた面積S2に相当する。
このとき、本実施例では光学的フィルタ4を調整して、
λ1・λ2の幅を適切に設定しており、S1とS2とが等し
くなっているものである。つまり、受光素子3が受ける
光量は温度による影響を受けないものとなっている。
The actual measurement is at the wavelength λThreeImpossible in one point
Yes, wavelength λThreeIncluding wavelength λ1To wavelength λTwoIn the range of
The determination is based on the amount of light received by the optical element 3.
You. This light amount is the point A shown in FIG.
Four・ AThree・ A9・ A7・ ATen・ AFourArea S surrounded by1Equivalent to
I do. In the case of the temperature of d, the point A shown in FIG.Five・ A Three
・ A9・ A6・ ATen・ AFiveArea S surrounded byTwoIs equivalent to
At this time, in the present embodiment, the optical filter 4 is adjusted to
λ1・ ΛTwoIs set appropriately, and S1And STwoEqual
It is getting worse. That is, the light receiving element 3 receives
The light quantity is not affected by the temperature.

【0014】波形処理手段7は、前記受光素子3が受光
した光量を増幅器6を介して受け、同時に波形血糖値関
連手段9から、光量と血糖値との関係を示すデータを受
ける。このデータは、図5に示す勾配Kである。すなわ
ち、予め耳朶等から採取した少量の血液について、血糖
値C1とこのときの光量Saとを求めておき、このデータ
を血糖値入力手段8からデータ入力するものである。波
形血糖値関連手段9は、このデータによって勾配Kを演
算し基礎データとして記憶しているものである。従っ
て、波形処理手段7から今回測定した光量Sbを示すデ
ータを受けると、血糖値C2を直ちに演算して、血糖値
表示手段10に表示するものである。
The waveform processing means 7 receives the amount of light received by the light receiving element 3 via the amplifier 6 and, at the same time, receives data indicating the relationship between the amount of light and the blood sugar level from the waveform blood sugar level related means 9. This data is the gradient K shown in FIG. That is, for a small amount of blood collected in advance from earlobe or the like, to previously obtain a blood glucose value C 1 and the light amount S a in this case is for data input the data from the blood glucose value input unit 8. The waveform blood sugar level-related means 9 calculates the gradient K based on this data and stores it as basic data. Therefore, upon receiving the data indicating the light amount Sb measured this time from the waveform processing means 7, the blood sugar level C2 is immediately calculated and displayed on the blood sugar level display means 10.

【0015】以上のように本実施例によれば、光学的フ
ィルタ4を調整して、透過する光の周波数帯域を適切に
設定することによって、温度による影響を受けることな
く正確な血糖値を簡単に知ることが出来るものである。
As described above, according to this embodiment, by adjusting the optical filter 4 and appropriately setting the frequency band of transmitted light, an accurate blood glucose level can be easily obtained without being affected by temperature. Can be known to

【0016】またこのとき、透過する光の周波数を1789
nmを含んだ帯域に設定すると、血液中の糖分の濃度の変
化による受光光量の変化を、他の波長帯を設定した場合
よりも大きくとることができ、一層正確な測定が出来る
ものである。
At this time, the frequency of the transmitted light is 1789
When it is set to a band including nm, a change in the amount of received light due to a change in the concentration of sugar in blood can be made larger than that when other wavelength bands are set, so that more accurate measurement can be performed.

【0017】[0017]

【発明の効果】請求項1に記載した発明は、可視光域か
ら赤外光域までの光を発光する発光素子と、発光素子が
発光した光の内の特定波長帯を選択的に透過する光学的
フィルタと、発光素子が発光した光を前記光学的フィル
タを介して受光する受光素子と、受光素子によって得た
波形から光の減衰量を演算する波形処理手段と、血液中
の血糖値を入力する血糖値入力手段と、波形処理手段の
出力と血糖値入力手段から得られる情報を関係づける波
形血糖値関連手段と、血糖値を表示する血糖値表示手段
とを有する構成として、人体の温度変化による影響の少
ない血糖計を実現するものである。
According to the first aspect of the present invention, a light emitting element that emits light in a visible light range to an infrared light range and a specific wavelength band of light emitted by the light emitting element are selectively transmitted. An optical filter, a light receiving element that receives light emitted by the light emitting element through the optical filter, a waveform processing unit that calculates an amount of light attenuation from a waveform obtained by the light receiving element, and a blood glucose level in blood. A blood glucose level input means for inputting, a waveform blood glucose level related means for associating the output of the waveform processing means with information obtained from the blood glucose level input means, and a blood glucose level display means for displaying a blood glucose level; This realizes a blood glucose meter that is less affected by the change.

【0018】請求項2に記載した発明は、光学的フィル
タは、1789nmの波長を含む波長帯を透過する構成とし
て、血糖値の主体であるグリコース糖による吸収を精度
良く検知できる血糖計を実現するものである。
According to a second aspect of the present invention, the optical filter is configured to transmit a wavelength band including a wavelength of 1789 nm, thereby realizing a blood glucose meter capable of accurately detecting absorption by glucose glucose, which is a main component of a blood glucose level. Things.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の実施例である血糖計の構成を示すブロ
ック図
FIG. 1 is a block diagram showing a configuration of a blood glucose meter according to an embodiment of the present invention.

【図2】同、血糖濃度による吸光特性の変化を示す特性
FIG. 2 is a characteristic diagram showing a change in light absorption characteristics depending on blood glucose concentration.

【図3】同、温度による吸光特性の変化を示す特性図FIG. 3 is a characteristic diagram showing changes in light absorption characteristics with temperature.

【図4】同、光学的フィルタの作用を説明する説明図FIG. 4 is an explanatory diagram for explaining the operation of the optical filter.

【図5】同、血糖値と光量との関係を示す特性図FIG. 5 is a characteristic diagram showing a relationship between a blood glucose level and a light amount.

【符号の説明】[Explanation of symbols]

2 発光素子 3 受光素子 4 光学的フィルタ 7 波形処理手段 8 血糖値表示手段 9 波形血糖値関連手段 10 血糖値表示手段 2 light emitting element 3 light receiving element 4 optical filter 7 waveform processing means 8 blood glucose level display means 9 waveform blood glucose level related means 10 blood glucose level display means

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 可視光域から赤外光域までの光を発光す
る発光素子と、発光素子が発光した光の内の特定波長帯
を選択的に透過する光学的フィルタと、発光素子が発光
した光を前記光学的フィルタを介して受光する受光素子
と、受光素子によって得た波形から光の減衰量を演算す
る波形処理手段と、血液中の血糖値を入力する血糖値入
力手段と、波形処理手段の出力と血糖値入力手段から得
られる情報を関係づける波形血糖値関連手段と、血糖値
を表示する血糖値表示手段とを有する血糖計。
1. A light-emitting element that emits light from a visible light region to an infrared light region, an optical filter that selectively transmits a specific wavelength band of light emitted by the light-emitting device, and a light-emitting device that emits light A light receiving element for receiving the converted light through the optical filter, a waveform processing means for calculating an amount of attenuation of light from a waveform obtained by the light receiving element, a blood glucose level inputting means for inputting a blood glucose level in blood, A blood glucose meter having a waveform blood glucose level-related means for correlating an output of a processing means with information obtained from a blood glucose level input means, and a blood glucose level display means for displaying a blood glucose level.
【請求項2】 光学的フィルタは、1789nmの波長を含む
波長帯を透過する請求項1記載の血糖計。
2. The blood glucose meter according to claim 1, wherein the optical filter transmits a wavelength band including a wavelength of 1789 nm.
JP32376696A 1996-12-04 1996-12-04 Blood glucose meter Expired - Fee Related JP3521662B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP32376696A JP3521662B2 (en) 1996-12-04 1996-12-04 Blood glucose meter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP32376696A JP3521662B2 (en) 1996-12-04 1996-12-04 Blood glucose meter

Publications (2)

Publication Number Publication Date
JPH10155776A true JPH10155776A (en) 1998-06-16
JP3521662B2 JP3521662B2 (en) 2004-04-19

Family

ID=18158396

Family Applications (1)

Application Number Title Priority Date Filing Date
JP32376696A Expired - Fee Related JP3521662B2 (en) 1996-12-04 1996-12-04 Blood glucose meter

Country Status (1)

Country Link
JP (1) JP3521662B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007523715A (en) * 2004-02-25 2007-08-23 ネルコアー ピューリタン ベネット インコーポレイテッド Oxygen concentration meter crosstalk reduction
JP2012021811A (en) * 2010-07-12 2012-02-02 Seiko Epson Corp Concentration determination apparatus, concentration determination method, and program
US9464983B2 (en) 2010-07-12 2016-10-11 Seiko Epson Corporation Concentration determination apparatus, probe, concentration determination method, and program

Cited By (4)

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JP2007523715A (en) * 2004-02-25 2007-08-23 ネルコアー ピューリタン ベネット インコーポレイテッド Oxygen concentration meter crosstalk reduction
JP4701235B2 (en) * 2004-02-25 2011-06-15 ネルコー ピューリタン ベネット エルエルシー Oxygen concentration meter crosstalk reduction
JP2012021811A (en) * 2010-07-12 2012-02-02 Seiko Epson Corp Concentration determination apparatus, concentration determination method, and program
US9464983B2 (en) 2010-07-12 2016-10-11 Seiko Epson Corporation Concentration determination apparatus, probe, concentration determination method, and program

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