JP4623742B2 - 血圧をモニターするシステムおよび方法 - Google Patents
血圧をモニターするシステムおよび方法 Download PDFInfo
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Description
図2Aおよび図2Bは、心臓活動の通常の心臓収縮と心臓拡張フェイズの間の本発明のモニターシステムに用いられる織物の、可能な光透過および反射反応を説明する概略図、
図2Cおよび図2Dはそれぞれ、そのような織物を形成するパッチの下にある血液管が総合的にふさがれ、血液が再び流れるときに、織物の可能な光透過および反射反応を説明する概略図、
図2Eは、心臓活動の通常の心臓収縮と心臓拡張フェイズの間、織物が伸び、また回復するとき(図2Aおよび図2B)、および織物の下にある血液管が総合的にふさがれ、その後、血液が再び流れるとき(図2Cおよび図2D)の、織物によって反射される光の総計に対する織物を通して透過された光の総計における変化のグラフを用いた図、
図2Fは、図2Eにおいて代表されるようなモニターする織物によって反射された光の総計に対するモニターする織物を通して透過された光の総計における変化を表わす信号、周期時間のグラフを用いた図、
図3は、本発明の方法およびシステムが着用者の血圧をモニターするのに用いられるとき、着用者の動脈の上に配置された膨らませることができるカフにおいて測定された血圧と、検知器に現れる電圧との間の一時の関係を示す図である。
図1は、血圧脈拍によって引き起こされる動脈の壁が曲がることに関係して、対象の体における幾何学的な変化による動きを検出することによって対象の血圧を直接的にモニターするための本発明の方法に有用なシステム10の様式化した図である。
図1に示されるように、システム10は、都合のよい織物構造(例えば、編まれたり、織られたり)を有し、適した織物フィラメント、衣料品デニール糸から作られるスリーブ12を含む。スリーブ12は、モニターする織物16から形成された、少なくとも一部またはパッチ14を含む。モニターする織物16は、内側の表面16Iと外側の表面16Eを有する。パッチ14は、図1では長方形状として示されているが、どのような都合のよい、あるいは望まれる形状を取ってもよいと理解されるべきである。もし望まれるなら、スリーブ12の一部または全体でさえも織物16で作ることもできる。
ここで用いられたように、「近赤外光」という用語は、約700ナノメーター〜約2200ナノメーターの範囲の波長を有する光を意味する。805ナノメーターの波長または880ナノメーターの波長は、近赤外範囲において動作するシステムに用いることができる。805ナノメーターの波長が好ましい。
伸びる糸は、どのような従来の方法でも形成することができる。例えば、伸びる糸は、被覆された弾性糸と固い糸の組み合わせとして形成することができる。
テレフタレート(PET)、ポリトリメチレン テレフタレート(PTT)およびポリテトラブチレン テレフタレートを含む。1つの好ましい例では、ポリエステル2種系フィラメントは、個々のフィラメントの断面に見られるようなサイドバイサイドの関係にある、PETポリマーの構成要素およびPTTポリマーの構成要素を含む。この構造を有する1つの例の糸は、登録商標T-400 次世代ファイバーの元で、デラウェア19805、ウィルミントン、INVISTA ノース アメリカ S. ar. l.によって販売される。
68フィラメントナイロン糸である。
さらに本発明によれば、固い糸の部分は、例えば、ポリエチレン
テレフタレート(PET)、ポリトリメチレン テレフタレート(PTT)、ポリブチレン テレフタレートおよびそのコポリエステルのようなポリエステルのようなポリエステルを含むことができる。
スリーブ12の構造の残りは、もしモニターする織物で形成もしないなら、どのような便利な織物構造(例えば上述した編みまたは織り)を示すことができ、またどのような適した織物フィラメント衣料品デニール糸からも作ることができる。
ジョージア アトランタ ハントクリフ トレース 9635)からモデルDT155(0-5電圧出力)として利用可能なものである。
血液の勢いのよい流れが減少するとき、光バランスおよび検知器22からの信号出力は、通常の拡張および収縮活動の間、示される領域の方へ復帰する。
典型的な動作モードにおいて、本発明の機械は、上腕の動脈の上にスリーブ12の織物のパッチ14を有し、一般に図1の点線の輪郭で示された位置の人の腕に適用されるだろう。膨らませることができるカフ28は、スリーブ12の上に適用される。
上記で説明したように本発明の技術の利益を有するこの技術に熟練した人々は、それに加えて、修正をもたらすことができる。そのような修正は、従属請求項によって定義されるように、本発明の範囲内にあるように解釈されるべきである。
Claims (13)
- 血圧をモニターするシステムであって、
空気圧を異ならせるために選択的に膨らませることができるアームカフと、
前記アームカフの上または中に設けられ、伸長によって光透過特性と光反射特性の両方が変化する織物を含むパッチと、
前記織物に取り付けられ、前記織物へ向けて放射線を放射する放射線源と、
前記織物に取り付けられた放射線検知器とを含んでなることを特徴とする血圧をモニターするシステム。 - 前記放射線源は、約400〜約2200ナノメーターの範囲の波長を有する放射線を放ち、前記放射線検知器は、約400〜約2200ナノメーターの範囲の波長を有する入射放射線に反応することを特徴とする請求項1記載の血圧をモニターするシステム。
- 前記織物が伸びるとき、前記アームカフ内の空気圧の変化に対応して現れる、前記パッチの下に配置された動脈を通る血液の流れの変化による着用者の体の動きに応じた、前記織物によって反射された光の総計に対する前記織物を通して透過された光の総計の変化によって、前記放射線検知器による入射放射線の検知量が直接的に影響されるように、前記放射線源および前記放射線検知器が相関的な位置において、前記織物に取り付けられていることを特徴とする請求項1記載の血圧をモニターするシステム。
- 前記織物は、前記アームカフと複合的であることを特徴とする請求項1記載の血圧をモニターするシステム。
- 前記織物は、第1の複数の反射する糸と第2の複数の伸びる糸とを含み、前記第1の複数の反射する糸は、前記第2の複数の伸びる糸と共に、織り込まれ、または編み込まれていることを特徴とする請求項1記載の血圧をモニターするシステム。
- 前記織物が、第1の側と第2の側とを有し、前記放射線源と前記放射線検知器が前記織物の同じ側に取り付けられていることを特徴とする請求項1記載の血圧をモニターするシステム。
- 前記織物が、第1の側と第2の側とを有し、前記放射線源と前記放射線検知器が前記織物の相対する側に取り付けられていることを特徴とする請求項1記載の血圧をモニターするシステム。
- 膨らませることができるアームカフを備えて用いられる、血圧をモニターするシステムであって、
前記アームカフは、着用者の体の一部を受け入れるための大きさに作られ、前記アームカフが配置された前記着用者の体の一部に位置する動脈を通る血液の流れを変更するために、異なる空気圧に選択的に膨らませることができ、
該システムはパッチを含み、該パッチの少なくとも一部は、光で照らされるとき、光透過性と光反射性の両方を示す織物から形成され、前記織物が、前記パッチの下に配置される動脈を通る血液の変化による前記着用者の体の幾何学的変化に応じて伸びるとき、前記織物によって反射された光の総計に対する前記織物を通して透過された光の総計が変化し、
該システムは、約400〜約2200ナノメーターの範囲の波長を有する放射線源と、約400〜約2200ナノメーターの範囲の波長を有する入射放射線に応じて信号を発生する放射線検知器とを含み、膨らませることができる前記アームカフ内の空気圧の変化に対応して現れる、前記パッチの下に配置された動脈を通る血液の流れの変化による前記着用者の体の動きに応じて、前記織物が伸びるとき、前記織物によって反射された光の総計に対する前記織物を通して透過された光の総計の変化によって、前記放射線検知器による入射放射線の検知量が直接的に影響されるように、前記放射線源および前記放射線検知器が相関的な位置において前記織物に取り付けられており、
該システムは、前記放射線検知器の出力が最小値のとき、前記アームカフ内の圧力を記録し、前記放射線検知器からの信号があらかじめ決められた基準信号値の範囲以内にある間は、引き続き、前記アームカフ内の圧力を記録するための、前記放射線検知器からの信号出力に反応する圧力記録装置を含むことを特徴とする、血圧をモニターするシステム。 - 前記織物が、第1の側と第2の側とを有し、前記放射線源と前記放射線検知器が前記織物の相対する側に取り付けられていることを特徴とする請求項8記載の血圧をモニターするシステム。
- 前記織物が、第1の側と第2の側とを有し、前記放射線源と前記放射線検知器が前記織物の同じ側に取り付けられていることを特徴とする請求項8記載の血圧をモニターするシステム。
- 請求項8記載の血圧をモニターするシステムを用いることを特徴とする、血圧をモニターする方法。
- 前記放射線検知器の出力が最小値のとき、前記アームカフ内の圧力を測定し、前記放射線検知器からの信号があらかじめ決められた基準信号値の範囲以内にある間は、引き続き、前記アームカフ内の圧力を測定することを特徴とする請求項11記載の血圧をモニターする方法。
- 前記アームカフ内の空気圧の変化に対応して現れる、前記パッチの下に配置された動脈を通る血液の流れの変化による前記着用者の体の動きに応じて、前記織物が伸びるとき、前記織物によって反射された光の総計に対する前記織物を通して透過された光の総計の変化によって、前記放射線検知器による入射放射線の検知量が直接的に影響されるように、前記放射線源および前記放射線検知器が相関的な位置において、前記織物に取り付けられていることを特徴とする請求項11または12に記載の血圧をモニターする方法。
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