Patent ID: 8551005
Filing Date: 2013-10-08
Classification: A61B

Abstract:
1. A method, comprising: receiving arterial blood pressure data associated with a patient; determining a heart rate of the patient using the arterial blood pressure data; calculating a pulse pressure of the patient based on a difference between a maximum arterial blood pressure of the patient and a minimum arterial blood pressure of the patient over a period of time equal to at least two times a period of the heart rate of the patient; determining a respiratory rate of the patient; calculating, using a processor, a respiratory variation of the pulse pressure of the patient based on a difference between a maximum pulse pressure of the patient over a first period of time equal to at least two times a period of the respiratory rate of the patient and a minimum pulse pressure of the patient over the first period of time; and calculating a first value by dividing the respiratory variation of the pulse pressure by a mean pulse pressure of the patient, wherein the determining a respiratory rate of the patient comprises: performing a fast fourier transform of the pulse pressure of the patient calculated over a period of time.