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Monitoring system for sleep disordered breathing
专利权人:
David F. Hastings
发明人:
David F. Hastings,Xin Good,Hannes Kraetschmer,Dirk Muessig
申请号:
US11746156
公开号:
US08718751B2
申请日:
2007.05.09
申请国别(地区):
US
年份:
2014
代理人:
摘要:
A heart monitoring system comprises a ventricular sensing stage sensing excitation or contraction of ventricular myocardium, an activity sensor unit determining a signal reflecting a patients physical activity, a ventricular impedance or conductance measuring module, said modules comprising a current source unit adapted to provide a sub-threshold excitation current to the myocardium and comprising an impedance or conductance measurement unit for measuring the resulting voltage on said electrode at the myocardium, a signal generator module, a filter module, a memory, a control unit adapted to derive single measures ΣZ of magnitude of impedance or conductance change over a preset sample time interval, determine the variability TARVI in the impedance or conductance change, compare this variability and the activity sensor output signal with a threshold and recent history, determine if sleep disturbed breathing (SDB) is present, and log the SDB episode in the memory device.
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