System and method of monitoring systolic pressure variation
First Claim
1. A method of monitoring a patient, the method comprising:
- acquiring a respiration waveform and an arterial pressure waveform from the patient;
determining a window on the respiration waveform that represents end expiration and approximates an apnea condition; and
calculating at least one of a systolic pressure variation value, a delta up value, and a delta down value based on at least a portion of the arterial pressure waveform corresponding to the window on the respiration waveform.
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Abstract
System and method of monitoring a patient including acquiring a respiration waveform and an arterial pressure waveform and determining a window on the respiration waveform that represents end expiration and approximates an apnea condition. The method can include calculating a systolic pressure variation value, a delta up value, and a delta down value based on a portion of the arterial pressure waveform corresponding to the window on the respiration waveform. In some embodiments, the respiration waveform can be acquired without manual interruption of mechanical ventilation and the values can be calculated substantially continuously.
24 Citations
17 Claims
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1. A method of monitoring a patient, the method comprising:
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acquiring a respiration waveform and an arterial pressure waveform from the patient;
determining a window on the respiration waveform that represents end expiration and approximates an apnea condition; and
calculating at least one of a systolic pressure variation value, a delta up value, and a delta down value based on at least a portion of the arterial pressure waveform corresponding to the window on the respiration waveform. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A computer program embodied by a computer readable medium capable of being executed by a computer, the computer program for use in a patient monitoring system, the computer program comprising:
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an acquisition module that communicates with a ventilator to acquire a respiration waveform and an arterial pressure waveform from a patient; and
an analysis module that determines a window on the respiration waveform that represents end expiration and that approximates an apnea condition, the analysis module calculating at least one of a systolic pressure variation value, a delta up value, and a delta down value based on at least a portion of the arterial pressure waveform corresponding to the window on the respiration waveform.
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13. A method of monitoring a patient connected to a ventilator, the method comprising:
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acquiring a respiration waveform from the patient without manually interrupting the ventilator;
determining a window on the respiration waveform that represents end expiration and approximates an apnea condition;
acquiring an arterial pressure waveform from the patient, the arterial pressure waveform including systolic pressure values that correspond to the window of the respiration waveform;
averaging the systolic pressure values to determine a reference systolic pressure value; and
calculating at least one of a systolic pressure variation value, a delta up value, and a delta down value based on the reference systolic pressure value. - View Dependent Claims (14, 15, 16, 17)
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Specification