Tissue Oxygenation Monitoring in Heart Failure
First Claim
Patent Images
1. A method for controlling a therapy in a patient, comprising;
- sensing an activity sensor signal;
detecting a change in activity level of the patient from the activity sensor signal;
sensing an optical sensor signal corresponding to tissue light attenuation;
computing a tissue oxygenation measurement in response to detecting the change in activity level;
detecting a decrease in tissue oxygenation in response to the tissue oxygenation measurement; and
adjusting a parameter controlling delivery of the therapy in response to detecting the decreased tissue oxygenation.
1 Assignment
0 Petitions
Accused Products
Abstract
A medical device system and associated method control the delivery of a therapy to a patient. The system includes an activity sensor and detects a change in activity level of the patient. The system further include an optical sensor to sense signal corresponding to tissue light attenuation. The system computes a tissue oxygenation measurement in response to detecting a change in activity level. A parameter controlling delivery of the therapy is adjusted in response to detecting the decreased tissue oxygenation.
119 Citations
27 Claims
-
1. A method for controlling a therapy in a patient, comprising;
-
sensing an activity sensor signal; detecting a change in activity level of the patient from the activity sensor signal; sensing an optical sensor signal corresponding to tissue light attenuation; computing a tissue oxygenation measurement in response to detecting the change in activity level; detecting a decrease in tissue oxygenation in response to the tissue oxygenation measurement; and adjusting a parameter controlling delivery of the therapy in response to detecting the decreased tissue oxygenation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. A medical device system for delivering a therapy to a patient, comprising:
-
a controller to set a therapy delivery control parameter; an optical sensor to produce a signal corresponding to tissue light attenuation; an activity sensor to produce a signal correlated to an activity level of a patient; a processor configured to compute an activity measurement from the activity sensor signal, detect a change in activity in response to the activity measurement, compute a tissue oxygenation measurement from the optical sensor signal in response to detecting the change in activity, and detect a decrease in tissue oxygenation in response to the computed tissue oxygenation measurement, wherein the controller adjusts the control parameter in response to the processor detecting the decreased tissue oxygenation. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
-
-
27. A 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; sensing an optical sensor signal corresponding to tissue light attenuation; computing a tissue oxygenation measurement in response to detecting the change in activity level; detecting a decrease in tissue oxygenation in response to the tissue oxygenation measurement; and adjusting a parameter controlling delivery of a therapy in response to detecting the decreased tissue oxygenation.
-
Specification