Calibration of impedance monitoring of respiratory volumes...

Details Calibration of impedance monitoring of respiratory volumes... Calibration of impedance monitoring of respiratory volumes...

2005-04-26

2009-10-13

Marmor, II, Charles A (Department: 3735)

Surgery

Diagnostic testing

Measuring electrical impedance or conductance of body portion

C600S538000

Reexamination Certificate

active

07603170

ABSTRACT:
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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