JP7260471B2 - Iv浸潤を検出するシステムおよび方法 - Google Patents
Iv浸潤を検出するシステムおよび方法 Download PDFInfo
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Description
104 生体インピーダンスセンサ
106 歪みゲージ
108 アナログフロントエンドインタフェース
110 アナログフロントエンドインタフェース
112 マイクロ制御装置
114 反射率
116 追加の温度情報/バッテリバックアップ
118 フロントエンドインタフェース
120 記憶デバイス
122 タブレット
124 無線接続
126 低エネルギー伝送
201 骨
204 手首
206 歪みゲージ
211 筋肉
220 ネオプレン製スリーブ
250 皮下の浸潤流体
502 末梢センサ
504 マイクロプロセッサ
506 一体型アナログフロントエンド
508 追加のメモリ記憶デバイス
510 無線伝送デバイス
512 LED
514 RTDドライバ
516 電源管理集積回路
Claims (20)
- 使用者の末梢カテーテル挿入部位またはその周囲の生理学的状態を捉えるシステムであって、
前記システムは、
複数のウェアラブルセンサと、
前記ウェアラブルセンサと無線電気通信している体から離したプロセッサであり、前記体から離したプロセッサは、前記プロセッサで実行されるとき、前記複数のウェアラブルセンサから収集されたセンサデータを処理して、IV浸潤に関連する血管外流体の存在を識別する指示を含むアルゴリズムを格納したメモリを備え、
前記プロセッサと電気通信しており、血管外流体の存在を示す指示を提供するように構成された、インジケータと、を含み、
前記ウェアラブルセンサのうち、第1のセンサは、運動センサ、位置センサ、または慣性測定センサの1つであり、前記ウェアラブルセンサのうち、第2のセンサは、電気バイオインピーダンス(EBI)を連続的に測定し、前記ウェアラブルセンサのうち、第3のセンサは、腫れ、皮膚の固さ、皮膚温度、皮膚の歪み、反射率から選択された生理学的状態を継続的に測定し;
前記アルゴリズムは、前記第2のセンサおよび前記第3のセンサのうちの少なくとも1つの読み取りにおけるアーチファクトを検出可能な第1のセンサの測定に基づいて、血管外流体の存在の偽陽性識別を検出するように構成された、システム。 - 前記第2のセンサは、電気的生体インピーダンス(EBI)システムを含み、前記EBIシステムが、皮膚上に位置決めされたときに1つまたは複数の周波数でEBIを測定するように構成された電極を含む、請求項1に記載のシステム。
- 前記システムが、前記EBIシステムの電極を通して注入された電流を監視し、前記電流の振幅が規定の限界を超えた場合に前記電流を遮断するように構成される、請求項2に記載のシステム。
- 前記システムが、ダイナミックレンジの解像度および使用を最大限に高めるために、前記EBIシステムによって注入される電流の振幅を使用者ごとに自動的に調節するように構成される、請求項2または3に記載のシステム。
- 前記第3のセンサが、皮膚温度を測定するように構成された温度センサを含む、請求項1から3のいずれか一項に記載のシステム。
- 前記第3のセンサが、皮膚の伸長を測定するように構成された歪みゲージを含む、請求項1から5のいずれか一項に記載のシステム。
- 前記慣性測定センサが、肢の位置もしくは動き、またはその両方を測定するように構成された加速度計を含む、請求項1から6のいずれか一項に記載のシステム。
- 前記慣性測定センサが、肢の動きを測定するように構成されたジャイロスコープを含む、請求項1から7のいずれか一項に記載のシステム。
- 前記第3のセンサが、反射フォトプレチスモグラフィ(PPG)信号を測定するように構成された光学センサを含む、請求項1から8のいずれか一項に記載のシステム。
- 前記第3のセンサが、皮膚の近赤外分光(NIRS)を測定するように構成された光学センサを含む、請求項1から9のいずれか一項に記載のシステム。
- 前記システムは、前記カテーテル挿入部位の周りの複数の異なる部位からEBI測定値を取得するための複数の電極をさらに備え、前記複数の電極の各1つは、前記ウェアラブルセンサの1つと接続されている、請求項1から10のいずれか一項に記載のシステム。
- 肢の位置および動きを、前記EBI測定値を解析するためのコンテキストとして前記センサデータを処理する前記アルゴリズムを使用する、請求項11に記載のシステム。
- 前記センサデータを処理する前記アルゴリズムが、皮膚温度を、前記EBI測定値を解析するためのコンテキストとして使用する、請求項11または12に記載のシステム。
- 前記センサデータを処理する前記アルゴリズムが、EBI電極のうちの1つまたは複数が皮膚と接触しなくなった場合に、そのことを検出する、請求項11から13のいずれか一項に記載のシステム。
- 前記アルゴリズムが、複数の感知様式からのデータを融合することによって、前記センサデータから欠陥を検出するようにさらに構成される、請求項1から14のいずれか一項に記載のシステム。
- 前記アルゴリズムが、複数の位置からのEBI測定値を融合して、前記センサデータの欠陥を検出する、請求項15に記載のシステム。
- 前記慣性測定センサが、肢の動きデータを収集し、前記肢の動きデータは、データを収集する適当な間隔、または電力効率のために前記システムを低消費電力のスリープモードにする適当な間隔を決定するのに使用される、請求項1から16のいずれか一項に記載のシステム。
- 少なくとも2つのサブシステムをさらに含み、第1のサブシステムが、前記カテーテル挿入部位の周りの生理学的データを取り込むように構成され、第2のサブシステムが、異なる位置のデータを取り込むように構成され、前記第2のサブシステムによって取り込まれるデータが、前記第1のサブシステムによって取り込まれるデータとの比較のための対照または参照として使用される、請求項1から17のいずれか一項に記載のシステム。
- 前記アルゴリズムが、前記第1のサブシステムから取得したデータを、前記第2のサブシステムから取得したデータと比較する、請求項18に記載のシステム。
- 前記アルゴリズムは、動きを示す前記第1のセンサの情報を使用して、前記生理学的状態が四肢の動きによって影響を受ける第3のセンサの測定値を調整する、請求項1~19のいずれか一項に記載のシステム。
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