Method and apparatus for detecting change in intrathoracic electrical impedance

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United States of America Patent

PATENT NO 9408574
SERIAL NO

13867166

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Abstract

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A method and apparatus for detection of changes in impedance a patient that includes generating measured impedances, generating an adaptive baseline trend of the measured impedances corresponding to a first time period, generating a short term trend of the measured impedances corresponding to a second time period less than the first time period, determining changes in relative position of the short term trend and the baseline trend, the determined changes in relative position corresponding to determining intersecting of the baseline trend by the short term trend, determining differences between the baseline trend and calculated period average impedances, and accumulating, in response to determining no intersecting of the baseline trend by the short term trend, the determined differences between the baseline trend and the calculated period average impedances.

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Patent Owner(s)

  • MEDTRONIC, INC.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Stadler, Robert W Shoreview, US 192 9533
Wang, Li Shanghai, CN 850 5963

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