Methods and systems to monitor venous blood oxygen saturation
First Claim
1. A method for monitoring a patient'"'"'s venous blood oxygen saturation (SvO2), comprising:
- (a) obtaining at least one signal indicative of electrical activity of a patient'"'"'s heart;
(b) measuring at least one metric of cardiac cycles represented in the at least one signal indicative of electrical activity of the patient'"'"'s heart, wherein the at least one metric changes with changes in SvO2; and
(c) monitoring the patient'"'"'s SvO2 based on the at least one metric.
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Accused Products
Abstract
Methods and system are provided for monitoring a patients venous blood oxygen saturation (SvO2). At least one signal indicative of electrical activity of a patient'"'"'s heart is obtained. Such a signal can be, e.g., an IEGM or ECG signal. In specific embodiments, such a signal(s) can be obtained from implanted electrodes, and thus, embodiments of the present invention can be implemented by an implantable system. Additionally, there are measurements of at least one metric of cardiac cycles represented in the at least one signal indicative of electrical activity of the patient'"'"'s heart, where the metric changes with changes in SvO2. Examples of such metric include T-wave metrics and PR intervals. SvO2, and changes therein, are monitored based on the measured metric(s).
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Citations
24 Claims
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1. A method for monitoring a patient'"'"'s venous blood oxygen saturation (SvO2), comprising:
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(a) obtaining at least one signal indicative of electrical activity of a patient'"'"'s heart; (b) measuring at least one metric of cardiac cycles represented in the at least one signal indicative of electrical activity of the patient'"'"'s heart, wherein the at least one metric changes with changes in SvO2; and (c) monitoring the patient'"'"'s SvO2 based on the at least one metric. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method for monitoring for changes in a patient'"'"'s venous blood oxygen saturation (SvO2), comprising:
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(a) obtaining at least one signal indicative of electrical activity of a patient'"'"'s heart; (b) measuring at least one metric of cardiac cycles represented in the at least one signal indicative of electrical activity of the patient'"'"'s heart, wherein the at least one metric changes with changes in SvO2; (c) repeating steps (a) and (b) over time to thereby monitor changes over time in the at least one metric; and (d) monitoring changes in the patient'"'"'s SvO2 based on the changes in the at least one metric. - View Dependent Claims (18)
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19. A system for monitoring a patient'"'"'s venous blood oxygen saturation (SvO2), comprising:
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a sensing circuit to obtain at least one signal indicative of electrical activity of a patient'"'"'s heart; a measure component to measure at least one metric of cardiac cycles represented in the at least one signal indicative of electrical activity of the patient'"'"'s heart, wherein the at least one metric changes with changes in SvO2; and a monitor to monitor the patient'"'"'s SvO2 based on the at least one metric. - View Dependent Claims (20, 21, 22, 23, 24)
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Specification