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US 5,876,353 AGranted
Impedance monitor for discerning edema through evaluation of respiratory rate
AssigneeMedtronic, Inc.
InventorKenneth M. Riff
Life of this patent
Estimating the term…
Abstract
An impedance monitor for discerning edema through evaluation of respiratory rate. Preferred embodiment includes edema monitor and trigger to initiate diagnostic reporting or corrective action when activated. Recording of Long Term Average and Short Term Average values for secondary edema measure based on DC signal level are described as are methods and apparatus for removing unwanted recurring noise.
Claims25
An implantable edema monitoring device having:
- an impedance sensor for making impedance measurements in a living body into which said device is implanted, and
- memory and evaluation circuitry means for monitoring said impedance measurements, and for generating a value representative of respiratory rate based on evaluation of said impedance measurements over time,
- edema value generator circuitry means for monitoring changes in said respiratory rate value, so as to generates an edema level value indicative of a measured value of edema in said living body based solely on said changes in said respiratory rate value.
A method of determining patient pulmonary edema comprising:
- storing a history of respiratory rate in an implanted device, thereby creating a monitored history in storage,
- monitoring changes in the respiratory rate of the patient,
- determining a level of edema based on said changes in said respiratory rate that have occurred during said monitored history.
A method of determining patient pulmonary edema comprising:
- storing a history of respiratory rate in an implanted device,
- monitoring changes in the respiratory rate of the patient,
- determining a level of patient health based on said changes in said respiratory rate that have occurred during said monitored history.
An implantable edema monitoring device having:
- an impedance sensor for making impedance measurements in a living body into which said device is implanted, and
- memory and evaluation circuitry means for monitoring said impedance measurements, and for generating a value representative of respiratory rate based on evaluation of said impedance measurements over time,
- patient health value generator circuitry means for monitoring changes in said respiratory rate value, so as to generates a patient health level value indicative of general physical health in said living body based solely on said changes in said respiratory rate value.
Dependencies are inferred from the claim text.