JP5416333B2 - 心臓データを取得するための装置及び方法 - Google Patents
心臓データを取得するための装置及び方法 Download PDFInfo
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- 238000000034 method Methods 0.000 title claims description 15
- 230000000747 cardiac effect Effects 0.000 title claims description 12
- 206010003658 Atrial Fibrillation Diseases 0.000 claims description 19
- 238000005311 autocorrelation function Methods 0.000 claims description 14
- 238000001914 filtration Methods 0.000 claims description 3
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- 238000004458 analytical method Methods 0.000 description 10
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- 206010003119 arrhythmia Diseases 0.000 description 4
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/316—Modalities, i.e. specific diagnostic methods
- A61B5/318—Heart-related electrical modalities, e.g. electrocardiography [ECG]
- A61B5/346—Analysis of electrocardiograms
- A61B5/349—Detecting specific parameters of the electrocardiograph cycle
- A61B5/361—Detecting fibrillation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/024—Detecting, measuring or recording pulse rate or heart rate
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
- A61B5/6813—Specially adapted to be attached to a specific body part
- A61B5/6829—Foot or ankle
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Cardiology (AREA)
- Heart & Thoracic Surgery (AREA)
- Molecular Biology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Physics & Mathematics (AREA)
- Medical Informatics (AREA)
- Biophysics (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Physiology (AREA)
- Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
Description
Webster, ed. Medical Instrumentation Application and Design 3rd ed., New York: Wiley, 1998, pp. 265
この時系列x(n)及びx(n+k)において、n=1,2,...N、k=1,2,...,Kである。
アナログ/ディジタル変換器46においてサンプリングが実施されるため、Kをスパイク間のサンプル数として表現するとより好都合となることが多い。このケースの式は次式となる。
したがって、スケール30の上に立ったヒトの心拍速度がヒトの足から決定される。典型的には、10秒分のデータを用いて心拍速度を決定することができる。こうして決定された心拍速度はスケール30のディスプレイ36に提供されることがある。
心房細動の検出については、QRS群同士の間隔の不規則性をこの目的で用いることができる。さもなければ、所与のサイクル数(例えば、10サイクル)にわたるPQRSTデータからなる平均心拍動特徴または中央値心拍動特徴を、導体104内の信号から決定することができる。心房細動では、上で指摘したようにP波が存在しないか十分に画定されない。平均の心拍動または中央値心拍動の時間内に少なくとも1つの適正なP波が欠如していることを用いて心房細動を検出することができる。
20 足電極から得た出力信号
30 スケール
32 導電性足置き
34 導電性足置き
36 ディスプレイ
38 リード
40 リード
42 ECG増幅器
44 導体
46 アナログ/ディジタル変換器
48 導体
50 帯域通過フィルタ
52 導体
54 フィルタ処理済み信号
56 自己相関実行素子
58 導体
60 解析素子
62 スパイク振幅
70 心房細動の心電計信号
72 自己相関関数
100 装置
102 QRSトリガ素子
104 導体
106 タイミング回路素子
Claims (9)
- ヒトから心臓情報を取得するための方法であって、
ヒトの足にを付着する電極(32、34)がヒトから心臓データを含む生体電気信号(20)を取得する工程と、
前記生体電気信号をフィルタ処理し心臓データを含んだフィルタ処理済み信号をフィルタ(50)が提供する工程(50)と、
前記フィルタ処理済み信号の自己相関を実行して、自己相関関数y(k)内に見出される最大のスパイク振幅を位置特定する工程と、
前記最大のスパイク振幅に対する百分率で表されるしきい値を定義する工程と、
前記自己相関関数内のスパイク振幅が前記しきい値を越えるか否かを決定することにより、前記フィルタ処理済み信号内で所望の心臓情報の取得に有用な離散的な規模的変動をプロセッサが特定する工程(56)と、
前記離散的変動の特徴をプロセッサが決定する工程(60)と、
前記決定した特徴を用いてヒトからの前記所望心臓情報をプロセッサが取得する工程と、
を含み、
前記しきい値を超えるスパイクは存在しないことが、前記ヒトが心房細動を起こしているとの指示を提供することに使用される、方法。 - 前記離散的な規模的変動を特定する工程(56)は、
さらに、連続する離散的変動間の間隔特性を決定する工程を含む請求項1に記載の方法。 - 前記所望心臓情報を取得する工程は、
さらに、前記決定した間隔特性を用いてヒトの心拍速度を取得する工程を含む請求項2に記載の方法。 - 前記所望心臓情報を取得する工程は、
さらに、離散的な規模的変動間の間隔特性の変動を用いてヒトの心房細動に関する情報を取得する工程を含む請求項2に記載の方法。 - 前記所望心臓情報を取得する工程は、
さらに、心拍動フィーチャの形態的フィーチャの欠如を用いてヒトの心房細動に関する情報を取得する工程を含む請求項1に記載の方法。 - 前記生体電気信号(20)は、前記電極を有するスケールを踏む前記ヒトから取得される、請求項1に記載の方法。
- ヒトから心臓情報を取得するための装置であって、
ヒトから心臓データを含む生体電気信号(20)を取得するためにヒトの足に付着可能な電極(32、34)と、
前記生体電気信号を受け取り心臓データを含むフィルタ処理済み信号を提供するフィルタ(50)と、
前記フィルタ処理済み信号の自己相関を実行して、自己相関関数y(k)内に見出される最大のスパイク振幅を位置特定する手段と、
前記最大のスパイク振幅に対する百分率で表されるしきい値を定義する手段と、
前記自己相関関数内のスパイク振幅が前記しきい値を越えるか否かを決定することにより、前記フィルタ処理済み信号内で所望の心臓情報の取得に有用な離散的な規模的変動を特定するための手段(56)と、
前記離散的な変動の特徴を決定するための手段(60)と、
ヒトから前記所望心臓情報を取得するように前記決定した特徴を使用する手段と、
を備え、
前記しきい値を超えるスパイクは存在しないことが、前記ヒトが心房細動を起こしているとの指示を提供することに使用される、装置。 - 前記使用の手段はさらに、連続する離散的変動間の間隔特性の変動を用いてヒトの心房細動に関する情報を取得するものとして規定される、請求項7に記載の装置。
- 前記決定の手段はさらに、心拍動のある形態的フィーチャの欠如を決定してヒトの心房細動に関する情報を取得するものとして規定される、請求項7に記載の装置。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/186,738 US7283870B2 (en) | 2005-07-21 | 2005-07-21 | Apparatus and method for obtaining cardiac data |
US11/186,738 | 2005-07-21 |
Publications (3)
Publication Number | Publication Date |
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JP2007029723A JP2007029723A (ja) | 2007-02-08 |
JP2007029723A5 JP2007029723A5 (ja) | 2011-09-08 |
JP5416333B2 true JP5416333B2 (ja) | 2014-02-12 |
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JP2006196726A Expired - Fee Related JP5416333B2 (ja) | 2005-07-21 | 2006-07-19 | 心臓データを取得するための装置及び方法 |
Country Status (4)
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US (1) | US7283870B2 (ja) |
EP (1) | EP1745740B1 (ja) |
JP (1) | JP5416333B2 (ja) |
DE (1) | DE602006021671D1 (ja) |
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EP1745740B1 (en) | 2011-05-04 |
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US7283870B2 (en) | 2007-10-16 |
US20070021815A1 (en) | 2007-01-25 |
EP1745740A1 (en) | 2007-01-24 |
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