DETECTING A VASOACTIVE AGENT IN THE BLOODSTREAM
First Claim
1. A method for detecting a vasoactive agent in a patient'"'"'s bloodstream, comprising:
- receiving an input signal that is associated with arterial blood pressure;
determining a change over time associated with pulsatility of the input signal; and
automatically detecting a vasoactive agent in the bloodstream using the determined change.
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Accused Products
Abstract
A system and method are disclosed for detecting a vasoactive agent in patient'"'"'s bloodstream. In one embodiment, an input signal is received that is associated with arterial blood pressure. A change of an arterial blood pressure parameter over time is determined. A vasoactive agent is then automatically detected using the determined change. In another embodiment, a waveform associated with an arterial blood pressure signal can be received. A parameter associated with the received waveform is calculate. Then the calculated parameter can be used to determine the presence of a vasoactive agent. In yet another embodiment, detection of a vasoactive agent in any of the other embodiments can be used in a calculation of a hemodynamic parameter, such as cardiac output, stroke volume, systemic vascular resistance, stroke volume variation, cardiac index, stroke volume index, systemic vascular resistance index, vascular compliance, and vascular tone.
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Citations
33 Claims
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1. A method for detecting a vasoactive agent in a patient'"'"'s bloodstream, comprising:
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receiving an input signal that is associated with arterial blood pressure; determining a change over time associated with pulsatility of the input signal; and automatically detecting a vasoactive agent in the bloodstream using the determined change. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method of detecting a vasoactive agent, comprising:
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receiving a waveform associated with an arterial blood pressure signal; using the received waveform, calculating at least one parameter associated with pulsatility of the arterial blood pressure signal; and detecting a presence of a vasoactive agent using the calculated parameter. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A system for detecting a vasoactive agent, comprising:
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a sensor that generates a signal corresponding to arterial blood pressure; and a processor for using the signal to calculate a parameter corresponding to pulsatility and analyzing whether a change in the parameter over time exceeds a predetermined threshold and, if so, calculating a hemodynamic parameter taking into account a presence of a vasoactive agent. - View Dependent Claims (31)
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32. A method for detecting a vasoactive agent in a bloodstream, comprising:
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receiving data associated with a blood-pressure parameter at a first point in time; receiving data associated with the blood-pressure parameter at a second point in time; comparing the data at the first and second points in time; and based on the comparison, detecting a presence of a vasoactive agent in the bloodstream. - View Dependent Claims (33)
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Specification