US 8,571,620 B2 · Tissue oxygenation monitoring in heart failure

Abstract

A medical device system and associated method are used for monitoring a heart failure patient. A medical device for monitoring delivery of a therapy includes a sensor sensing an optical sensor signal corresponding to light attenuation by a volume of body tissue of a patient, a therapy delivery module to deliver a therapy, and a processor configured to compute a first tissue oxygenation measurement from the optical sensor signal prior to initiating delivery of the therapy, compute a second tissue oxygenation measurement from the optical sensor signal subsequent to initiating delivery of the therapy, compare the first and the second tissue oxygenation measurements, and determine whether the delivered therapy was successful in response to the first tissue oxygenation measurement and the second tissue oxygenation measurement.

Claims21

Dependent claims

A medical device for monitoring delivery of a therapy, comprising:

a sensor sensing an optical sensor signal corresponding to light attenuation by a volume of body tissue of a patient;
a therapy delivery module to deliver the therapy;
and
a processor configured to compute a first tissue oxygenation measurement from the optical sensor signal prior to initiating delivery of the therapy, compute a second tissue oxygenation measurement from the optical sensor signal subsequent to initiating delivery of the therapy, compare the first and the second tissue oxygenation measurements, and determine whether the delivered therapy was successful in response to the first tissue oxygenation measurement and the second tissue oxygenation measurement, wherein the processor determines whether the delivered therapy was successful in response to the second tissue oxygenation measurement being greater than the first tissue oxygenation measurement.

1 more element

A method for monitoring delivery of a therapy in a medical device, comprising;

sensing an optical sensor signal corresponding to light attenuation by a volume of body tissue of a patient;
initiating delivery of the therapy;
computing a first tissue oxygenation measurement from the optical sensor signal prior to initiating deliver of the therapy;
computing a second tissue oxygenation measurement from the optical sensor signal subsequent to initiating delivery of the therapy;
comparing the first and the second tissue oxygenation measurements;
and
determining whether the therapy was successful in response to the second tissue oxygenation measurement being greater than the first tissue oxygenation measurement.

4 more elements

A non-transitory computer readable medium having computer executable instructions for performing a method comprising:

sensing an activity sensor signal;
detecting a change in activity level of the patient from the activity sensor signal;
computing a first tissue oxygenation measurement in response to detecting the change in activity level;
computing a second tissue oxygenation measurement in response to detecting the change in activity level;
detecting a decrease in tissue oxygenation in response to the first tissue oxygenation measurement computed in response to detecting the change in activity level;
adjusting a parameter controlling delivery of the therapy in response to detecting the decreased tissue oxygenation;
comparing the first tissue oxygenation measurement to the second tissue oxygenation measurement;
and
determining whether the therapy was successful in response to the second tissue oxygenation measurement being greater than the first tissue oxygenation measurement.

6 more elements

Dependencies are inferred from the claim text.

Tissue oxygenation monitoring in heart failure

Life of this patent

Tissue oxygenation monitoring in heart failure

Life of this patent

Abstract

Claims21