Decongestive therapy titration for heart failure patients using implantable sensor
First Claim
1. A method of operating a medical device system for assessing decongestive therapy delivered to a heart failure patient, comprising:
- sensing a physiologic parameter indicative of the patient'"'"'s diuresis status via a sensing circuit of the medical device system;
delivering the sensed physiologic parameter to a processing module of the medical device system;
determining, by the processing module, when a target level of patient diuresis has been achieved based on either;
(1) a change of the sensed physiologic parameter that matches a specified value of the physiologic parameter for a previous prior success of achieving the target level of patient diuresis;
or(2) a rate of change of a difference between the sensed physiologic parameter and a target parameter threshold meeting a target rate of change; and
producing an output in response to determining that the target level of patient diuresis has been achieved according to the processing module determination, wherein the output comprises one or more of adjusting system-regulated decongestive therapy and presenting a patient response to therapy notification via a user interface of the medical device system.
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Abstract
Assessing decongestive therapy delivered to a heart failure patient involves use of an implantable sensor configured to sense a physiologic parameter indicative of the patient'"'"'s diuresis status and a processor coupled to the implantable sensor. The sensor may comprise a thoracic fluid sensor, a heart sounds sensor, a cardiac chamber or arterial pressure sensor, a respiration sensor, or a blood chemistry sensor, for example. The processor is configured to determine if a target level of patient diuresis has been achieved based on a relationship between the sensed physiologic parameter and a threshold developed for the patient, and to produce an output in response to determining that the target level of patient diuresis has been achieved. The processor may be disposed in an implantable housing, in a patient-external housing, or in a network server system.
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Citations
20 Claims
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1. A method of operating a medical device system for assessing decongestive therapy delivered to a heart failure patient, comprising:
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sensing a physiologic parameter indicative of the patient'"'"'s diuresis status via a sensing circuit of the medical device system; delivering the sensed physiologic parameter to a processing module of the medical device system; determining, by the processing module, when a target level of patient diuresis has been achieved based on either; (1) a change of the sensed physiologic parameter that matches a specified value of the physiologic parameter for a previous prior success of achieving the target level of patient diuresis;
or(2) a rate of change of a difference between the sensed physiologic parameter and a target parameter threshold meeting a target rate of change; and producing an output in response to determining that the target level of patient diuresis has been achieved according to the processing module determination, wherein the output comprises one or more of adjusting system-regulated decongestive therapy and presenting a patient response to therapy notification via a user interface of the medical device system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of operating a medical device system for assessing a decongestive therapy delivered to a heart failure patient, comprising:
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sensing a physiologic parameter indicative of the patient'"'"'s status responsive to the therapy via a sensing circuit of the medical device system; delivering the sensed physiologic parameter to a processing module of the medical device system, wherein the processing module is configured to determine a patient'"'"'s diuresis status; the processing module further configured to determine when a target level of therapy benefit to the patient has been achieved based on a rate of change of a difference between the sensed physiologic parameter and a target parameter threshold meeting a target rate of change, wherein the target parameter threshold corresponds to an established safe level of patient diuresis; and producing, according to a patient diuresis status determined by the processing module, a first output to indicate that the target level of patient benefit has been achieved and a second output including, in response to determining that the patient is subject to over-therapeuting, one or more of adjusting a system-regulated decongestive therapy and presenting notification of the over-therapeuting via a user interface. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification