发明授权
- 专利标题： Calibration of impedance monitoring of respiratory volumes using thoracic D.C. impedance
- 专利标题（中）： 使用胸部直流阻抗校正阻抗监测呼吸体积
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申请号： US12557372申请日： 2009-09-10
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公开(公告)号： US08200326B2公开(公告)日： 2012-06-12
- 发明人: John D. Hatlestad , Loell Boyce Moon , Jesse W. Hartley , Jeffrey E. Stahmann
- 申请人： John D. Hatlestad , Loell Boyce Moon , Jesse W. Hartley , Jeffrey E. Stahmann
- 申请人地址： US MN St. Paul
- 专利权人： Cardiac Pacemakers, Inc.
- 当前专利权人： Cardiac Pacemakers, Inc.
- 当前专利权人地址： US MN St. Paul
- 代理机构： Schwegman, Lundberg & Woessner, P.A.
- 主分类号： A61B5/05
- IPC分类号： A61B5/05 ; A61B5/08
摘要：
A system includes an implantable medical device that includes a trans-thoracic impedance measurement circuit providing a trans-thoracic impedance signal of a subject. A controller is coupled to the trans-thoracic impedance circuit. The controller extracts a respiration signal from the trans-thoracic impedance signal, measures a breathing volume of the subject using the amplitude of the respiration signal and a breathing volume calibration factor, computes an adjusted breathing volume calibration factor using a reference baseline value of the trans-thoracic impedance and a measured baseline value of the trans-thoracic impedance, and computes a calibrated breathing volume using the adjusted breathing volume calibration factor.
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