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System and method for detecting pulmonary edema based on impedance measured using an implantable medical device during a lead maturation interval
System and method for detecting pulmonary edema based on impedance measured using an implantable medical device during a lead maturation interval
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机译:基于在铅成熟间隔期间使用可植入医疗设备测量的阻抗来检测肺水肿的系统和方法
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摘要
Techniques are provided for use by implantable medical devices such as cardiac resynchronization therapy (CRT) devices for detecting pulmonary edema based on transthoracic impedance sensed using cardiac pacing/sensing leads, wherein detection can be performed while lead maturation occurs. Briefly, the implantable device determines whether the leads are within an initial post-implant interval following implant during which lead maturation generally occurs. The device then detects pulmonary edema or related medical conditions within the patient based on transthoracic impedance using a set of detection parameters adjusted for use during the post-implant interval. Thus, rather than “blanking” impedance data during lead maturation, the device instead detects and processes impedance during this period to identify possible episodes of pulmonary edema so that appropriate measures can be undertaken, such as delivery of warnings or titration of appropriate medications.
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