METHOD AND APPARATUS FOR DETECTION OF VENOUS PULSATION
First Claim
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1. A method for detecting venous pulsation, comprising:
- deriving a metric of the pulse shape of one or more plethysmographic signals;
deriving a phase comparison of the plethysmographic signals; and
detecting the presence of venous pulsation based on the metric of the pulse shape and the phase comparison.
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Abstract
Methods and systems for detecting venous pulsation are provided. In one embodiment, a metric of the pulse shape of one or more plethysmographic signals is derived and the presence of venous pulsation is detected based on the metric of pulse shape. Examples, of metrics of pulse shape include a skew metric and a ratio of a minima-to-maxima time over a pulse period interval. In an exemplary embodiment, the presence of venous pulsation is detected based on a metric of the pulse shape of one or more plethysmographic signals and on a phase comparison of the plethysmographic signals.
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Citations
21 Claims
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1. A method for detecting venous pulsation, comprising:
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deriving a metric of the pulse shape of one or more plethysmographic signals; deriving a phase comparison of the plethysmographic signals; and detecting the presence of venous pulsation based on the metric of the pulse shape and the phase comparison. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. One or more tangible, machine readable media, comprising code executable to perform the acts of:
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deriving a metric of the pulse shape of one or more plethysmographic signals; deriving a phase comparison of the plethysmographic signals; and detecting the presence of venous pulsation based on the metric of the pulse shape and the phase comparison. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A patient monitoring system comprising:
a patient monitor configured to; derive a metric of the pulse shape of one or more plethysmographic signals; derive a phase comparison of the plethysmographic signals; and detect the presence of venous pulsation based on the metric of the pulse shape and the phase comparison. - View Dependent Claims (16, 17, 18, 19, 20, 21)
Specification