Jonathan L. Kuhn,James K. Carney,Vinod Sharma,Shantanu Sarkar,Todd M. Zielinski,Tommy D. Bennett
申请号：
US15969369
公开号：
US20190336076A1
申请日:
2018.05.02
申请国别(地区):
US
年份:
2019
代理人:
摘要：
In some examples, determining a heart failure status includes using an implantable medical device configured for subcutaneous implantation and comprising a plurality of electrodes and an optical sensor. Processing circuitry of a system comprising the device may determine, for a patient, a current tissue oxygen saturation value based on a signal received from the at least one optical sensor, a current tissue impedance value based on a subcutaneous tissue impedance signal received from the electrodes, and a current pulse transit time value based on a cardiac electrogram signal received from the electrodes and at least one of the signal received from the optical sensor and the subcutaneous tissue impedance signal. The processing circuitry may further compare the current tissue oxygen saturation value, current tissue impedance value, and current pulse transit time value to corresponding baseline values, and determine the heart failure status of the patient based on the comparison.
