JP4657202B2 - 生理的事象検出器およびその方法 - Google Patents
生理的事象検出器およびその方法 Download PDFInfo
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- JP4657202B2 JP4657202B2 JP2006508753A JP2006508753A JP4657202B2 JP 4657202 B2 JP4657202 B2 JP 4657202B2 JP 2006508753 A JP2006508753 A JP 2006508753A JP 2006508753 A JP2006508753 A JP 2006508753A JP 4657202 B2 JP4657202 B2 JP 4657202B2
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/18—Applying electric currents by contact electrodes
- A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
- A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
- A61N1/362—Heart stimulators
- A61N1/365—Heart stimulators controlled by a physiological parameter, e.g. heart potential
-
- 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
- A61B5/353—Detecting P-waves
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- Cardiology (AREA)
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- Heart & Thoracic Surgery (AREA)
- Animal Behavior & Ethology (AREA)
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- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Radiology & Medical Imaging (AREA)
- Electrotherapy Devices (AREA)
- Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
Description
Claims (16)
- 生理的事象検出器であって、
アナログ生理的信号を、該アナログ生理的信号の傾斜を表すデジタルデルタ値に変換するデルタ変換器(12)と、
該デジタルデルタ値を相関テンプレートと相関させる相関器(22)と、
該相関器の出力に基づいて生理的事象を検出する事象検出器(24B)と、
を備え、
前記事象検出器は、前記相関器の前記出力を閾値と比較し、該比較に基づいて前記生理的事象を検出する閾値検出器(38)を含み、
変換された前記デジタルデルタ値は入力ベクトルを形成し、前記相関テンプレートは傾斜テンプレートベクトルを形成し、前記相関器の前記出力は、変換された前記デジタルデルタ値の複数のサンプルにわたる前記入力ベクトルと前記傾斜テンプレートベクトルの積の和であり、
それにより、変換されたデジタルデルタ値と相関テンプレートとの間で加重移動平均を提供し、
前記閾値検出器(38)は、前記相関器の出力を前記閾値にアドバックすることによって閾値を増加させて、閾値以下のノイズと閾値レベルの間に余裕を維持するための閾値アドバック手段を備える、
生理的事象検出器。 - 前記生理的事象は、呼吸事象又は心臓事象であり、該心臓事象は、特に、R波又はP波である請求項1に記載の生理的事象検出器。
- 前記相関器の前記出力の絶対値を生成する絶対値回路をさらに備え、前記閾値検出器は、前記相関器の前記出力の前記絶対値が前記閾値以上である場合に前記生理的事象を検出する請求項1に記載の生理的事象検出器。
- 前記閾値検出器は、前記相関器の前記出力が、前記相関テンプレートに関連する窓内で、前記閾値を超える第1傾斜と、それに続く、前記閾値を超える第2傾斜を生成する時に、前記生理的事象を検出する請求項1に記載の生理的事象検出器。
- 前記事象検出器は、前記相関器の前記出力のピークを検出し、該ピークの検出に応答して前記生理的事象を検出するピーク検出器を含む請求項1に記載の生理的事象検出器。
- 前記相関器の前記出力の絶対値を生成する絶対値回路をさらに備え、前記ピーク検出器は、前記相関器の前記出力の前記絶対値に基づいて前記生理的事象を検出する請求項5に記載の生理的事象検出器。
- 前記閾値検出器は、前記相関器の前記出力が、前記相関テンプレートに関連する窓内で、正のピーク傾斜と、それに続く、負のピーク傾斜を生成する時に前記生理的事象を検出する請求項5に記載の生理的事象検出器。
- 前記事象検出器は、前記相関器の前記出力を傾斜区分に分類する傾斜区分器、及び、該傾斜区分を解析して前記生理的事象を検出する弁別器を含む請求項1に記載の生理的事象検出器。
- アナログ生理的信号を、該アナログ生理的信号の傾斜を表すデジタルデルタ値に変換するステップと、
該デジタルデルタ値を相関テンプレート(32)と相関させるステップと、
該相関の出力に基づいて生理的事象を検出するステップと、
前記相関させるステップの出力を閾値と比較するステップと、
該比較に基づいて前記生理的事象を検出するステップと、
を含み、
前記変換されたデジタルデルタ値は入力ベクトルを形成し、前記相関テンプレートは傾斜テンプレートベクトルを形成し、前記相関させるステップの出力は、前記変換されたデジタルデルタ値の複数のサンプルにわたる前記入力ベクトルと前記傾斜テンプレートベクトルの積の和であり、
それにより、変換されたデジタルデルタ値と相関テンプレートとの間で加重移動平均を提供し、
前記相関による値を閾値と比較するステップが、更に、
前記相関させるステップの出力を閾値にアドバックして閾値を増加させるステップと、
を含む方法。 - 前記生理的事象は、呼吸事象又は心臓事象であり、該心臓事象は、特に、R波又はP波である請求項9に記載の方法。
- 前記相関による値の絶対値を生成するステップ、及び、前記相関による値の前記絶対値が前記閾値以上である場合に前記生理的事象を検出するステップとをさらに含む請求項9に記載の方法。
- 前記生理的事象を検出するステップは、前記相関による値が、前記相関テンプレートに関連する窓内で、前記閾値を超える第1傾斜と、それに続く、前記閾値を超える第2傾斜を生成する時に前記生理的事象を検出するステップを含む請求項9に記載の方法。
- 前記相関による値のピークを検出するステップ、及び、該ピークの検出に応答して前記生理的事象を検出するステップをさらに含む請求項9に記載の方法。
- 前記相関による値の絶対値を生成するステップ、及び、前記相関による値の前記絶対値に基づいて前記生理的事象を検出するステップをさらに含む請求項13に記載の方法。
- 前記相関による値が、前記相関テンプレートに関連する窓内で、正のピーク傾斜と、それに続く、負のピーク傾斜を生成する時に前記生理的事象を検出するステップをさらに含む請求項13に記載の方法。
- 前記相関による値を傾斜区分に分類するステップ、及び、該傾斜区分を解析して前記生理的事象を検出するステップをさらに含む請求項9に記載の方法。
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/376,920 US6985768B2 (en) | 2003-02-28 | 2003-02-28 | Physiological event detection |
| PCT/US2004/004633 WO2004078258A1 (en) | 2003-02-28 | 2004-02-17 | Physiological event detection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2006523126A JP2006523126A (ja) | 2006-10-12 |
| JP4657202B2 true JP4657202B2 (ja) | 2011-03-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2006508753A Expired - Fee Related JP4657202B2 (ja) | 2003-02-28 | 2004-02-17 | 生理的事象検出器およびその方法 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6985768B2 (ja) |
| EP (1) | EP1603636B1 (ja) |
| JP (1) | JP4657202B2 (ja) |
| CA (1) | CA2517078A1 (ja) |
| DE (1) | DE602004026696D1 (ja) |
| WO (1) | WO2004078258A1 (ja) |
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-
2003
- 2003-02-28 US US10/376,920 patent/US6985768B2/en not_active Expired - Fee Related
-
2004
- 2004-02-17 CA CA002517078A patent/CA2517078A1/en not_active Abandoned
- 2004-02-17 DE DE602004026696T patent/DE602004026696D1/de not_active Expired - Lifetime
- 2004-02-17 WO PCT/US2004/004633 patent/WO2004078258A1/en not_active Ceased
- 2004-02-17 JP JP2006508753A patent/JP4657202B2/ja not_active Expired - Fee Related
- 2004-02-17 EP EP04711891A patent/EP1603636B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US6985768B2 (en) | 2006-01-10 |
| DE602004026696D1 (de) | 2010-06-02 |
| JP2006523126A (ja) | 2006-10-12 |
| CA2517078A1 (en) | 2004-09-16 |
| WO2004078258A1 (en) | 2004-09-16 |
| US20040171953A1 (en) | 2004-09-02 |
| EP1603636A1 (en) | 2005-12-14 |
| EP1603636B1 (en) | 2010-04-21 |
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