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Electrocardiogram derived apnoea/hypopnea index

A technology for apnea and respiratory events, applied in electrocardiography, electrical digital data processing, bioelectrical signal measurement, etc., can solve problems such as small signal-to-noise ratio

Active Publication Date: 2014-04-23
COMPUMEDICS MEDICAL INNOVATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this CSA signal is very small compared to the background noise, that is, there is a small signal-to-noise ratio

Method used

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  • Electrocardiogram derived apnoea/hypopnea index
  • Electrocardiogram derived apnoea/hypopnea index
  • Electrocardiogram derived apnoea/hypopnea index

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Embodiment Construction

[0029] The present invention provides a method for determining an apnea / hypopnea index using previously unknown ECG signal data obtained from a subject. The method of the present invention advantageously utilizes the change of the ECG signal obtained during sleep to calculate an apnea / hypopnea index during sleep.

[0030] Different ECG leads measure a potential difference between different areas of the body. Respiration affects the impedance between multiple electrodes, and therefore the potential and the difference between them. The movement of the chest and abdomen changes during the respiratory event, and therefore changes how the impedance between the electrodes changes with breathing effort. This results in an observable phase change between the multiple signals derived from the ECG.

[0031] The method uses these phase changes as markers of respiratory events. This method advantageously utilizes a short time after a respiratory event and during an awakening process, during...

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Abstract

The present invention provides a method and apparatus for determining the occurrence of apnoeas or hypopneas from ECG signal data alone. The method is carried out by apparatus configured to acquire ECG signals from a sleeping subject, transform the signals to data, and extract ECG features relevant to estimate breathing effort for the determination of respiratory events characteristic of apnoeas and hypopneas. The extracted ECG features are correlates of breathing efforts and are used as surrogate measures of breathing or respiratory events. The method may include calculating an AHI or apnoea / hypopnea index. The method may classify apnoeas into obstructive or central apnoeas.

Description

Technical field [0001] The present invention relates to a method for obtaining from a subject (especially from a subject with sleep disordered breathing, more particularly sleep apnea, even more particularly obstructive sleep apnea or central sleep apnea) Method and device for acquiring and analyzing ECG data. Background technique [0002] Sleep apnea (SA) (including obstructive sleep apnea (OSA) and / or central sleep apnea (CSA), in which breathing is stopped) affects a significant proportion of the population. The effect of OSA is felt when the airway collapses and gas cannot pass through. The effects of CSA were felt when subjects were unable to inhale and exhale due to reasons associated with the functioning of the central nervous system. Both OSA and CSA can cause inefficient sleep and other medical problems. [0003] Currently, both OSA and CSA are diagnosed in sleep laboratories through overnight polysomnography (PSG) studies. In these studies, subjects have multiple elect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/0205
CPCA61B5/0205A61B5/0452A61B5/4818G06F19/345A61B5/7264G16H50/20A61B5/349
Inventor 克里斯·尼尔森尤金·兹尔博格
Owner COMPUMEDICS MEDICAL INNOVATION
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