JPS63132631A - Photoelectric signal detection sensor of continuous blood pressure measuring apparatus - Google Patents
Photoelectric signal detection sensor of continuous blood pressure measuring apparatusInfo
- Publication number
- JPS63132631A JPS63132631A JP61281247A JP28124786A JPS63132631A JP S63132631 A JPS63132631 A JP S63132631A JP 61281247 A JP61281247 A JP 61281247A JP 28124786 A JP28124786 A JP 28124786A JP S63132631 A JPS63132631 A JP S63132631A
- Authority
- JP
- Japan
- Prior art keywords
- light
- detection sensor
- photoelectric signal
- signal detection
- blood pressure
- 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
- 238000001514 detection method Methods 0.000 title claims description 25
- 230000036772 blood pressure Effects 0.000 title claims description 16
- 239000013307 optical fiber Substances 0.000 claims description 25
- 238000012360 testing method Methods 0.000 claims description 20
- 210000004204 blood vessel Anatomy 0.000 claims description 7
- 239000008280 blood Substances 0.000 claims description 6
- 210000004369 blood Anatomy 0.000 claims description 6
- 239000000463 material Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 230000017531 blood circulation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012778 molding material Substances 0.000 description 2
- 102000001554 Hemoglobins Human genes 0.000 description 1
- 108010054147 Hemoglobins Proteins 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003287 optical effect Effects 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）
この発明は、間接的に且つ連続的に血圧を簡易に測定で
きる連続的血圧測定装置の光電信号検出センサに関する
ものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a photoelectric signal detection sensor for a continuous blood pressure measuring device that can easily measure blood pressure indirectly and continuously.
（従来の技術）
運動時の血圧測定を目的とする装置として、例えばフレ
オンガスを用いた容積補償型連続的血圧測定装置がある
。この装置は被検部に外部から圧力を加え、そのときの
外圧から血管内圧を測定するもので、被検部には運動に
よる制約を受けにくい耳甲介部や指などが選らばれる。(Prior Art) As an apparatus for measuring blood pressure during exercise, there is, for example, a volume-compensated continuous blood pressure measuring apparatus using Freon gas. This device applies external pressure to the area to be examined and measures the intravascular pressure from the external pressure at that time.The areas to be examined are chosen to be areas such as the concha of the ear or fingers, which are less likely to be restricted by movement.
連続的血圧測定装置の装着部はこれらの被検部に装着さ
れ、この装着部には例えば光電信号検出センサと加圧用
カフ部とが、被検部をはさんで対向して配置されるもの
があり、この光電信号検出用センサの発光部は例えば近
赤外ＬＥＤが、受光部には例えばフォトトランジスタが
用いられ、これらは同一面上にモールドされている。そ
して、発光部から放射する光が、被検部の外皮や血管内
血液などの体内組織で反射するときに生じる光の変化を
受光部で検出し、血管内の血液量に応じた光電信号を取
出している。The attachment part of the continuous blood pressure measurement device is attached to these test parts, and in this mounting part, for example, a photoelectric signal detection sensor and a pressurization cuff part are placed facing each other with the test part in between. The light emitting part of this photoelectric signal detection sensor uses, for example, a near-infrared LED, and the light receiving part uses, for example, a phototransistor, and these are molded on the same surface. Then, the light receiving section detects the change in light that occurs when the light emitted from the light emitting section is reflected by body tissues such as the outer skin of the subject and intravascular blood, and generates a photoelectric signal according to the amount of blood in the blood vessel. It's being taken out.
（発明が解決しようとする問題点）
ところが、例えば近赤外ＬＥＤやフォトトランジスタは
共に発光や受光の際の指向性が比較的広いため、この光
電信号検出センサでは発光部と受光部とを近づけると、
被検部からの反射光と同時に光源からの直接光がモール
ド材内を通って受光されて光電信号のＳＮ比を悪くする
ことがある。(Problem to be Solved by the Invention) However, for example, near-infrared LEDs and phototransistors both have relatively wide directivity when emitting and receiving light, so in this photoelectric signal detection sensor, the light emitting part and the light receiving part are placed close to each other. and,
Direct light from the light source passes through the mold material and is received simultaneously with the reflected light from the test part, which may deteriorate the S/N ratio of the photoelectric signal.
このため、このような直接光の影響を抑えるために、発
光部と受光部とはある程度の距離を隔てて配置しなけれ
ばならず、装置の小型化という面で制約があった。Therefore, in order to suppress the influence of such direct light, the light emitting section and the light receiving section must be placed at a certain distance apart, which poses a restriction in terms of miniaturization of the device.
また、このように発光部と受光部とが離れているために
、この発光部と受光部との間に配置されるカフの最適な
配置位置の決定が難かしく、装着部を被検部に装着する
のに手間がかかった。Furthermore, since the light emitting part and the light receiving part are separated from each other, it is difficult to determine the optimal placement position of the cuff, which is placed between the light emitting part and the light receiving part. It took a while to put it on.
この発明はこのような実情に鑑みてなされたもので、小
型で装着部を被検部に容易に装着できる連続的血圧測定
装置の光電信号検出センサを提供することを目的として
いる。The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a photoelectric signal detection sensor for a continuous blood pressure measuring device that is small in size and whose attachment portion can be easily attached to a subject.
（問題点を解決するための手段）
この発明は前記問題点を解決するために、被検部を照射
する発光部と、前記被検部からの光の変化を検出する受
光部とを備え、外圧からの血管内の血液量の変化を縛記
受光部からの光電信号の変化として取出す連続的血圧測
定装置の光電信号検出センサにおいて、前記発光部に、
光源からの光を前記被検部に照射する光ファイバを備え
たことを特徴としている。(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention includes a light emitting section that irradiates the test section, and a light receiving section that detects a change in light from the test section, In a photoelectric signal detection sensor of a continuous blood pressure measuring device that extracts changes in blood volume in blood vessels due to external pressure as changes in photoelectric signals from a binding light receiving section, the light emitting section includes:
It is characterized by comprising an optical fiber that irradiates the test area with light from a light source.
（作用）
この発明では、光源からの光が光ファイバを通り被検部
に照射され、この被検部からの光は受光部で検出されて
、血管内の血液量の変化が光電信号の変化として取出さ
れる。このとき、光ファイバは光軸方向に鋭い指向性を
持フているので、発光部と受光部とを近接して配置して
も、発光部の光ファイバからの直接光が受光部に直接照
射されることがなく、受光部からの光電信号のＳＮ比が
良好で、装置の小型化が可能である。(Function) In this invention, light from a light source passes through an optical fiber and is irradiated onto the subject area, and the light from the subject area is detected by the light receiving unit, and changes in the amount of blood in the blood vessels are reflected in changes in the photoelectric signal. is extracted as At this time, since the optical fiber has sharp directivity in the optical axis direction, even if the light emitting part and the light receiving part are placed close to each other, the direct light from the optical fiber of the light emitting part will directly illuminate the light receiving part. Therefore, the SN ratio of the photoelectric signal from the light receiving section is good, and the device can be made smaller.
（実施例）
第１図はこの発明の光電信号検出用センサを備えた連続
的血圧測定装置の基本構成を示すブロック図である。図
において符号１はカフで、このカフｌの加圧側には制御
バルブ２を介してボンベ３が接続され、このボンベ３か
らフレオンガスをカフェに供給する。カフ１の減圧側に
は切換バルブ４を介して制御バルブ５が接続され、さら
にカフェと切換バルブ４との間には分岐管を介して圧カ
ドランスデューサ６が接続されている。(Embodiment) FIG. 1 is a block diagram showing the basic configuration of a continuous blood pressure measuring device equipped with a photoelectric signal detection sensor of the present invention. In the figure, reference numeral 1 denotes a cuff, and a cylinder 3 is connected to the pressurizing side of the cuff 1 via a control valve 2, and Freon gas is supplied from this cylinder 3 to the cuff. A control valve 5 is connected to the pressure reduction side of the cuff 1 via a switching valve 4, and a pressure transducer 6 is further connected between the cuff and the switching valve 4 via a branch pipe.
前記カフ１は光電信号検出センサ７と共に、連続的血圧
測定装置の装着部８に備えられ、この装着部８は運動に
よる制約を受けにくい耳甲介部や指などの被検部９に装
着される。装着部８はこの実施例では第２図に示すよう
に耳に装着され、光電信号検出センサ７から出力される
光電信号は、被検部９の血管の血液中のヘモグロビンに
対する吸収特性に基いた血管の血流容積変化を示してい
る。The cuff 1, together with a photoelectric signal detection sensor 7, is provided in a mounting section 8 of a continuous blood pressure measuring device, and this mounting section 8 is mounted on a test subject 9, such as the concha of the ear or a finger, which is not easily restricted by movement. Ru. In this embodiment, the attachment part 8 is attached to the ear as shown in FIG. It shows changes in blood flow volume of blood vessels.
光電信号は初期設定時には切換バルブ４を初期設定用し
ぼり！０に接続してフレオンガスをカフェに供給した状
態で検出され、切換スイッチ１１を介して初期設定回路
Ｉ２に送られる。初期設定回路１２は交流（ＡＣ）増幅
器！３、ピーク検出器１４、低周波ろ波器１５、サンプ
ルホールド回路１６からなり、所定の方法で基準レベル
を設定する。基準レベルを設定した後の自動計測では切
換バルブ４は制御バルブ５に切換えられ、このとき光電
信号が切換スイッチ１１を介して比較器１７に送られる
。この光電信号はサンプルホールド回路１６からの前記
基準信号と比較され、光電信号と基準信号との偏差（差
分）の比較信号がバルブ制御回路１８に送出される。バ
ルブ制御回路１８は偏差を０にするようにカフ圧を調整
し、このときのカフ圧、すなわち血圧を圧カドランスデ
ューサ６で検出するようになっている。The photoelectric signal is used for initial setting by squeezing the switching valve 4! 0 to supply Freon gas to the cafe, and is sent to the initial setting circuit I2 via the changeover switch 11. The initial setting circuit 12 is an alternating current (AC) amplifier! 3. It consists of a peak detector 14, a low frequency filter 15, and a sample and hold circuit 16, and sets a reference level using a predetermined method. In automatic measurement after setting the reference level, the switching valve 4 is switched to the control valve 5, and at this time a photoelectric signal is sent to the comparator 17 via the switching switch 11. This photoelectric signal is compared with the reference signal from the sample and hold circuit 16, and a comparison signal of the deviation (difference) between the photoelectric signal and the reference signal is sent to the valve control circuit 18. The valve control circuit 18 adjusts the cuff pressure so that the deviation is zero, and the pressure transducer 6 detects the cuff pressure at this time, that is, the blood pressure.
前記装着部８は第２図に示すように、一対のフレーム１
９．２０が所定の間隔を隔てて配置され、このフレーム
１９．２０の支持部１９ａ、２０ａは蝶番２１で連結さ
れている。フレーム１９．２０は軽量化を計るためにア
クリル材を主体とした材料で形成され、その一端に取付
けられた締付ボルト２２を回転することにより他端が開
閉できる。この端部の内側には前記カフェと光電信号検
出センサ７が対向して取付けられ、このカフェと光電信
号検出センサ７とで被検部８の耳甲介部を挟むようにな
っている。The mounting portion 8 is attached to a pair of frames 1 as shown in FIG.
9.20 are arranged at a predetermined interval, and the support parts 19a, 20a of this frame 19.20 are connected by a hinge 21. The frames 19 and 20 are mainly made of acrylic material to reduce weight, and the other end can be opened and closed by rotating a tightening bolt 22 attached to one end. The cafe and the photoelectric signal detection sensor 7 are mounted on the inside of this end so as to face each other, and the concha of the test subject 8 is sandwiched between the cafe and the photoelectric signal detection sensor 7.
光電信号検出センサ７は第３図、第４図に示すように発
光部Ａと受光部Ｂとから構成されている。即ち、フレー
ム２０に固定したモールド材２３の中央部には、発光部
Ａに備えられた光ファイバ２４がその端部２４ａを被検
部９に向けて配置され、受光部Ｂのフォトトランジスタ
等の受光素子２５は光ファイバ２４の端部２４ａに近接
して周囲４箇所に配置されている。光ファイバ２４の非
被検部９側の端部には図示しない光源、例えばＬＥＤが
接続されている。光ファイバ２４はこの光源からの光を
被検部９に照射するようになっている。この装置の光フ
ァイバ２４は多くの光量を必要とするので、コア径が太
いプラスチックファイバが好ましい。The photoelectric signal detection sensor 7 is composed of a light emitting section A and a light receiving section B, as shown in FIGS. 3 and 4. That is, in the center of the molding material 23 fixed to the frame 20, the optical fiber 24 provided in the light emitting part A is arranged with its end 24a facing the test part 9, and the optical fiber 24 of the light receiving part B, such as a phototransistor, is arranged. The light-receiving elements 25 are arranged at four locations near the end 24a of the optical fiber 24. A light source (not shown), for example, an LED, is connected to the end of the optical fiber 24 on the non-test part 9 side. The optical fiber 24 is configured to irradiate the subject 9 with light from this light source. Since the optical fiber 24 of this device requires a large amount of light, a plastic fiber with a large core diameter is preferable.
次に、この実施例の作用について説明する。Next, the operation of this embodiment will be explained.
例えば装着部８を被検部９の耳甲介部に取付けると、カ
フェと光電信号検出センサ７は被検部９を挟んで対向す
るようになる。この状態で前記のように計測の基準レベ
ルを設定し、その後の自動計測で光電信号検出センサ７
の光源であるＬＥＤからの光が光ファイバ２４を介して
被検部９に照射される。被検部９からの反射光の変化は
この部分の血管の血液中のヘモグロビンに対する吸収特
性に基いた血管の血流容積変化を示し、この反射光は光
ファイバ２４の周囲に配置された受光素子２５で検出さ
れ、この光電信号は比較器１７に送られる。この光電信
号はサンプルホールド回路１６からの前記基準信号と比
較され、光電信号と基準信号との偏差（差分）の比較信
号がバルブ制御回路１８に送出され、偏差をＯにするよ
うにカフ圧を調整し、このときのカフ圧、すなわち血圧
を圧カドランスデューサ６で検出する。For example, when the attachment part 8 is attached to the concha of the test subject 9, the cafe and the photoelectric signal detection sensor 7 will face each other with the test subject 9 in between. In this state, the reference level for measurement is set as described above, and the photoelectric signal detection sensor 7 is used for subsequent automatic measurements.
Light from an LED, which is a light source, is irradiated onto the test subject 9 via the optical fiber 24. Changes in the reflected light from the test area 9 indicate changes in the blood flow volume of the blood vessel based on the absorption characteristics of blood vessels in this area for hemoglobin in the blood, and this reflected light is transmitted to the light receiving element arranged around the optical fiber 24. 25 and this photoelectric signal is sent to a comparator 17. This photoelectric signal is compared with the reference signal from the sample hold circuit 16, and a comparison signal of the deviation (difference) between the photoelectric signal and the reference signal is sent to the valve control circuit 18, and the cuff pressure is adjusted so that the deviation becomes O. The cuff pressure, that is, the blood pressure at this time, is detected by the pressure transducer 6.
このように光電信号検出センサ７では、光源からの光が
光ファイバ２４を介して被検部８に照射されるが、光フ
ァイバ２４の鋭い指向性のために光が受光素子２５に直
接照射することがない。このため、光ファイバ２４の端
部２４ａに受光素子２５を近接して配置しても、受光素
子２５の光電信号のＳＮ比を良好に保持することができ
るから、装置の小型化が可能になる。In this way, in the photoelectric signal detection sensor 7, light from the light source is irradiated onto the test subject 8 via the optical fiber 24, but due to the sharp directivity of the optical fiber 24, the light is irradiated directly onto the light receiving element 25. Never. Therefore, even if the light-receiving element 25 is placed close to the end 24a of the optical fiber 24, the S/N ratio of the photoelectric signal of the light-receiving element 25 can be maintained at a good level, making it possible to downsize the device. .
また、この実施例では装着部８のフレーム１９．２０が
アクリル材を主体とした材料で形成されているので軽量
であり、しかも締付ボルト２２でフレーム１９．２０を
開閉して装着するので調整必要箇所が少なくなり、取り
扱いが一層容易である。In addition, in this embodiment, the frames 19.20 of the mounting part 8 are made of a material mainly made of acrylic material, so they are lightweight, and the frames 19.20 are opened and closed using the tightening bolts 22, so they can be adjusted. It requires fewer parts and is easier to handle.
なお、この実施例では光ファイバ２４の端部２４ａと受
光素子２５とをフレーム２０に固定したモールド材２３
に設けて、被検部９からの反射光を検出しているが、光
ファイバ２４と受光素子２５を対向して配置し、被検部
９を透過する光を検出するようにしてもよい。In this embodiment, a molding material 23 is used to fix the end 24a of the optical fiber 24 and the light receiving element 25 to the frame 20.
Although the optical fiber 24 and the light receiving element 25 are disposed facing each other to detect the light reflected from the subject part 9, the light passing through the subject part 9 may be detected.
さらに、受光部は受光素Ｙ−２５で構成しているが、被
検部９からの光を光ファイバを介して検出、測定するよ
うにしてもよく、このようにすることで一層小型化が可
能になる。Furthermore, although the light-receiving section is composed of the light-receiving element Y-25, the light from the test section 9 may be detected and measured via an optical fiber, and by doing so, further miniaturization can be achieved. It becomes possible.
（発明の効果）
この発明は前記のように、発光部に、光源からの光を被
検部に照射する光ファイバを備えたから、光源からの光
が指向性の良い光ファイバを介して被検部に照射され、
光ファイバからの照射光が受光部に直接照射されること
がなくなる。この結果、発光部の光ファイバに近接して
受光部を配置でき装置の小型化が可能である。この装置
の小型化で、光電信号検出センサをカフの真下に配置で
き、装着の際におけるカフ位置の２１整及び被検部への
装着が容易である。(Effects of the Invention) As described above, in this invention, since the light emitting section is equipped with an optical fiber that irradiates the object to be examined with light from the light source, the light from the light source is transmitted to the object to be examined through the optical fiber with good directionality. The area is irradiated,
The light emitted from the optical fiber is no longer directly irradiated onto the light receiving section. As a result, the light receiving section can be placed close to the optical fiber of the light emitting section, making it possible to downsize the device. Due to the miniaturization of this device, the photoelectric signal detection sensor can be placed directly under the cuff, making it easy to adjust the cuff position and attach it to the subject to be examined.
第１図はこの発明の光電信号検出センサを備えた連続的
血圧測定装置の基本構成を示すブロック図、第２図は光
電信号検出用センサを備えた装着部の斜視図、第３図は
光電信号検出用センサの正面図、第４図は第３図のＩＶ
−ｒＶ断面図である。
１・・・カフ
７・−光電信号検出センサ
８・−装着部
９・−被検部
２４・−光ファイバ
２５・−受光素子FIG. 1 is a block diagram showing the basic configuration of a continuous blood pressure measuring device equipped with a photoelectric signal detection sensor according to the present invention, FIG. 2 is a perspective view of a mounting section equipped with a photoelectric signal detection sensor, and FIG. 3 is a photoelectric signal detection sensor. A front view of the signal detection sensor, Figure 4 is IV in Figure 3.
-rV sectional view. 1... Cuff 7 - Photoelectric signal detection sensor 8 - Mounting part 9 - Testing part 24 - Optical fiber 25 - Light receiving element
Claims (3)
の変化を検出する受光部とを備え、外圧からの血管内の
血液量の変化を前記受光部からの光電信号の変化として
取出す連続的血圧測定装置の光電信号検出センサにおい
て、前記発光部に、光源からの光を前記被検部に照射す
る光ファイバを備えたことを特徴とする連続的血圧測定
装置の光電信号検出センサ。(1) Equipped with a light emitting unit that illuminates the test area and a light receiving unit that detects changes in light from the test area, and detects changes in blood volume in blood vessels due to external pressure using photoelectric signals from the light receiving unit. A photoelectric signal detection sensor for a continuous blood pressure measuring device that detects changes in blood pressure, characterized in that the light emitting section is provided with an optical fiber that irradiates the test area with light from a light source. detection sensor.
光素子を備えたことを特徴とする特許請求の範囲第１項
記載の連続的血圧測定装置の光電信号検出センサ。(2) The photoelectric signal detection sensor of the continuous blood pressure measuring device according to claim 1, wherein the light receiving section is provided with a light receiving element that detects a change in light from the subject part.
を備えたことを特徴とする特許請求の範囲第１項記載の
連続的血圧測定装置の光電信号検出センサ。(3) A photoelectric signal detection sensor for a continuous blood pressure measuring device according to claim 1, wherein the light receiving section is provided with an optical fiber that guides light from the subject.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61281247A JPS63132631A (en) | 1986-11-26 | 1986-11-26 | Photoelectric signal detection sensor of continuous blood pressure measuring apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61281247A JPS63132631A (en) | 1986-11-26 | 1986-11-26 | Photoelectric signal detection sensor of continuous blood pressure measuring apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63132631A true JPS63132631A (en) | 1988-06-04 |
Family
ID=17636406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61281247A Pending JPS63132631A (en) | 1986-11-26 | 1986-11-26 | Photoelectric signal detection sensor of continuous blood pressure measuring apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63132631A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006102162A (en) * | 2004-10-06 | 2006-04-20 | Nippon Telegr & Teleph Corp <Ntt> | Hemadynamometer |
| JP2006102249A (en) * | 2004-10-06 | 2006-04-20 | Terumo Corp | Blood pressure index measuring device, blood pressure index measuring method, control program and computer-readable storage medium |
| JP2006288630A (en) * | 2005-04-08 | 2006-10-26 | Terumo Corp | Blood pressure measuring apparatus and blood pressure measuring method |
| JP2006288501A (en) * | 2005-04-06 | 2006-10-26 | Nippon Telegr & Teleph Corp <Ntt> | Blood pressure measuring device |
| JP2007014570A (en) * | 2005-07-08 | 2007-01-25 | Nippon Telegr & Teleph Corp <Ntt> | Sphygmomanometer and control method of sphygmomanometer |
| JP2007098041A (en) * | 2005-10-07 | 2007-04-19 | Terumo Corp | Sphygmomanometry instrument |
-
1986
- 1986-11-26 JP JP61281247A patent/JPS63132631A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006102162A (en) * | 2004-10-06 | 2006-04-20 | Nippon Telegr & Teleph Corp <Ntt> | Hemadynamometer |
| JP2006102249A (en) * | 2004-10-06 | 2006-04-20 | Terumo Corp | Blood pressure index measuring device, blood pressure index measuring method, control program and computer-readable storage medium |
| JP2006288501A (en) * | 2005-04-06 | 2006-10-26 | Nippon Telegr & Teleph Corp <Ntt> | Blood pressure measuring device |
| JP4523867B2 (en) * | 2005-04-06 | 2010-08-11 | 日本電信電話株式会社 | Blood pressure measuring device |
| JP2006288630A (en) * | 2005-04-08 | 2006-10-26 | Terumo Corp | Blood pressure measuring apparatus and blood pressure measuring method |
| JP2007014570A (en) * | 2005-07-08 | 2007-01-25 | Nippon Telegr & Teleph Corp <Ntt> | Sphygmomanometer and control method of sphygmomanometer |
| JP2007098041A (en) * | 2005-10-07 | 2007-04-19 | Terumo Corp | Sphygmomanometry instrument |
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