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Cardiac cycle synchronized sampling of impedance signal
专利权人:
发明人:
Jaeho Kim,Quan Ni
申请号:
US13891318
公开号:
US08688214B2
申请日:
2013.05.10
申请国别(地区):
US
年份:
2014
代理人:
摘要:
A system comprising implantable device, the implantable medical device including an intrinsic cardiac signal sensor, an impedance measurement circuit configured to apply a specified current to a transthoracic region of a subject and to sample a transthoracic voltage resulting from the specified current, and a processor coupled to the intrinsic cardiac signal sensor and the impedance measurement circuit. The processor is configured to initiate sampling of a transthoracic voltage signal in a specified time relation to a fiducial marker in a sensed intrinsic cardiac signal, wherein the sampling attenuates or removes variation with cardiac stroke volume from the transthoracic voltage signal, and determine lung respiration using the sampled transthoracic voltage signal.
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