JP2013543781A - 体外式除細動器 - Google Patents
体外式除細動器 Download PDFInfo
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- JP2013543781A JP2013543781A JP2013540383A JP2013540383A JP2013543781A JP 2013543781 A JP2013543781 A JP 2013543781A JP 2013540383 A JP2013540383 A JP 2013540383A JP 2013540383 A JP2013540383 A JP 2013540383A JP 2013543781 A JP2013543781 A JP 2013543781A
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- 230000033764 rhythmic process Effects 0.000 claims abstract description 25
- 238000012774 diagnostic algorithm Methods 0.000 claims abstract description 22
- 230000035939 shock Effects 0.000 claims abstract description 12
- 238000001514 detection method Methods 0.000 claims abstract description 11
- 210000000115 thoracic cavity Anatomy 0.000 claims abstract description 6
- 210000000038 chest Anatomy 0.000 claims description 2
- 238000000034 method Methods 0.000 description 4
- 230000002051 biphasic effect Effects 0.000 description 3
- 230000001862 defibrillatory effect Effects 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 208000003663 ventricular fibrillation Diseases 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000001225 therapeutic effect Effects 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
- A61B5/053—Measuring electrical impedance or conductance of a portion of the body
- A61B5/0535—Impedance plethysmography
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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
- A61N1/38—Applying electric currents by contact electrodes alternating or intermittent currents for producing shock effects
- A61N1/39—Heart defibrillators
- A61N1/3918—Heart defibrillators characterised by shock pathway, e.g. by electrode configuration
-
- 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
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7203—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal
- A61B5/7207—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal of noise induced by motion artifacts
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7203—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal
- A61B5/7207—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal of noise induced by motion artifacts
- A61B5/721—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal of noise induced by motion artifacts using a separate sensor to detect motion or using motion information derived from signals other than the physiological signal to be measured
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7235—Details of waveform analysis
- A61B5/7239—Details of waveform analysis using differentiation including higher order derivatives
-
- 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
- A61N1/38—Applying electric currents by contact electrodes alternating or intermittent currents for producing shock effects
- A61N1/39—Heart defibrillators
- A61N1/3925—Monitoring; Protecting
-
- 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
- A61N1/38—Applying electric currents by contact electrodes alternating or intermittent currents for producing shock effects
- A61N1/39—Heart defibrillators
- A61N1/3925—Monitoring; Protecting
- A61N1/3931—Protecting, e.g. back-up systems
-
- 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
- A61N1/38—Applying electric currents by contact electrodes alternating or intermittent currents for producing shock effects
- A61N1/39—Heart defibrillators
- A61N1/3987—Heart defibrillators characterised by the timing or triggering of the shock
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- Heart & Thoracic Surgery (AREA)
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- Electrotherapy Devices (AREA)
Abstract
【選択図】図1
Description
a.ステップ100において、信号Zをマイクロプロセッサ24のソフトウェアによって微分し、その一次微分dZ/dtを取得する。
b.次に、ステップ110において、dZ/dtの振幅を計算する。
c.次に、ステップ120において、信号dZ/dtの振幅が特定の閾値よりも大きい場合にはステップ130においてフラグを1に設定し、そうでない場合にはステップ140においてフラグを0に設定する。
d.ステップ150において、フラグ値(0又は1)を最後の0.75秒にわたり平均する。これは、128要素の二進列(170.66のサンプルレートを用いた0.75秒に相当する)を供給することによって行う。列中の最古値を最新値で置き換え、二進列の要素を合計して128で割る。
e.ステップ160において、この平均が0.5よりも大きい場合、これはその時間のほとんどでdZ/dtが閾値よりも大きかったことを意味し、アルゴリズムは、診断アルゴリズムに除細動可能リズムの誤検出を発生させる可能性の高い干渉又は妨害を検出したというフラグを立てる(ステップ170)。ステップ180において、その他の場合は干渉も妨害も検出されない。
f.ステップ170において干渉が判明した場合、除細動器の診断アルゴリズムは、この実施形態では4秒間にわたり除細動可能リズムの検出を阻止される(ステップ190)。
Claims (5)
- 患者の心電図(ECG)を取得し患者にショックを与える患者電極と、患者の心臓が除細動可能リズムにあるか否かを検出する診断アルゴリズムを用いて前記患者のECGを解析する回路手段と、除細動可能リズムが前記診断アルゴリズムによって検出されるとイネーブルされるショック送達回路とを含む体外式除細動器であって、前記患者電極は、前記患者の胸郭インピーダンスの測度である信号(Z)の取得も可能にし、前記回路手段は、Zに応答して、前記診断アルゴリズムに除細動可能リズムの誤検出を発生させる可能性の高い干渉状態を検出し、該検出が行われた場合、少なくとも一定期間にわたり前記診断アルゴリズムによる除細動可能リズムの検出を阻止する、体外式除細動器。
- 請求項1に記載の除細動器において、前記回路手段は、Zの一次微分(dZ/dt)を形成し、移動時間窓でdZ/dtのエネルギーに関連する量を導出し、且つ該エネルギー関連量が特定の閾値レベルを超えているか否かを判定することによって、前記干渉状態を検出する除細動器。
- 請求項2に記載の除細動器において、前記エネルギー関連量は、前記移動窓内でdZ/dtの振幅がさらに別の閾値レベルを超える回数の測度である除細動器。
- 請求項2に記載の除細動器において、前記信号Zは、アナログ−デジタル変換され、Zの一連のデジタル値に関して、前記回路手段は、Zを微分してその一次微分dZ/dtを取得し、dZ/dtの振幅を計算し、前記信号dZ/dtの振幅が前記移動窓における値の少なくとも特定の最小比率に関してさらに別の閾値レベルよりも大きいか否かを判定する除細動器。
- 請求項1〜4のいずれか1項に記載の除細動器において、前記患者電極は、前記患者のECG及び胸郭インピーダンスの両方を取得する単一対の電極を含む除細動器。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IES20100746 | 2010-11-29 | ||
IES2010/0746 | 2010-11-29 | ||
PCT/EP2011/071069 WO2012072518A1 (en) | 2010-11-29 | 2011-11-25 | An external defibrillator |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2013543781A true JP2013543781A (ja) | 2013-12-09 |
JP6373006B2 JP6373006B2 (ja) | 2018-08-15 |
Family
ID=45034009
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2013540383A Active JP6373006B2 (ja) | 2010-11-29 | 2011-11-25 | 体外式除細動器 |
Country Status (5)
Country | Link |
---|---|
US (2) | US8909336B2 (ja) |
EP (1) | EP2646111B1 (ja) |
JP (1) | JP6373006B2 (ja) |
AU (1) | AU2011335129B2 (ja) |
WO (1) | WO2012072518A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPWO2021079862A1 (ja) * | 2019-10-24 | 2021-04-29 |
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US20150088215A1 (en) | 2015-03-26 |
US20130245708A1 (en) | 2013-09-19 |
AU2011335129A1 (en) | 2013-06-06 |
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US8909336B2 (en) | 2014-12-09 |
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US9238146B2 (en) | 2016-01-19 |
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