Method for Using a Pulse Oximetry Signal to Monitor Blood Pressure
First Claim
1. A system for continuously monitoring the blood pressure of a patient which comprises:
- a unit for measuring blood pressures in an artery of the patient during a measurement cycle, wherein the measurement cycle has a beginning and an end, and wherein a systolic pressure (psystolic) is measured at the beginning of the measurement cycle and a diastolic pressure (pdiastolic) is measured at the end of the measurement cycle;
a device for detecting blood pressure pulses in the cardio-vasculature of a patient during the measurement cycle, wherein each pulse has a first pulse amplitude value “
V1”
detected at a determined time within the measurement cycle, and a second pulse amplitude value “
V2”
detected at the end of the measurement cycle; and
a computer for correlating the systolic pressure (psystolic) with “
V2”
, to thereafter identify variations in pulse amplitudes V2 detected by the detecting device as indications of corresponding variations in systolic pressures (psystolic) during an extended time interval following the measurement cycle.
1 Assignment
0 Petitions
Accused Products
Abstract
A system for continuously monitoring the blood pressure of a patient over an extended time interval requires using a blood pressure measuring unit (e.g. a sphygmomanometer) to calibrate an oximeter. Specifically, the oximeter is used to continuously detect and measure amplitudes for each blood flow pulse of the patient. Periodically, the sphygmomanometer is used to measure blood pressures (systolic and diastolic) in an artery of the patient. Immediately after the measurement cycle is completed, a computer correlates the measured systolic pressure with the pulse amplitude that is detected by the oximeter. Thereafter, the pulse amplitudes that are detected by the oximeter are used as indications of variations in the systolic pressure during the extended time interval that follows.
-
Citations
20 Claims
-
1. A system for continuously monitoring the blood pressure of a patient which comprises:
-
a unit for measuring blood pressures in an artery of the patient during a measurement cycle, wherein the measurement cycle has a beginning and an end, and wherein a systolic pressure (psystolic) is measured at the beginning of the measurement cycle and a diastolic pressure (pdiastolic) is measured at the end of the measurement cycle; a device for detecting blood pressure pulses in the cardio-vasculature of a patient during the measurement cycle, wherein each pulse has a first pulse amplitude value “
V1”
detected at a determined time within the measurement cycle, and a second pulse amplitude value “
V2”
detected at the end of the measurement cycle; anda computer for correlating the systolic pressure (psystolic) with “
V2”
, to thereafter identify variations in pulse amplitudes V2 detected by the detecting device as indications of corresponding variations in systolic pressures (psystolic) during an extended time interval following the measurement cycle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A method for continuously monitoring the blood pressure of a patient which comprises the steps of:
-
measuring blood pressures in an artery of the patient during a measurement cycle, wherein a systolic pressure (psystolic) is measured at the beginning of the measurement cycle and a diastolic pressure (pdiastolic) is measured at the end of the measurement cycle; detecting blood pressure pulses in the cardio-vasculature of a patient, wherein each pulse has a pulse amplitude; correlating the systolic pressure (psystolic) measured in the measuring step with a pulse amplitude value detected in the detecting step; and identifying variations in pulse amplitude values during the detecting step as indications of variations in corresponding systolic pressures during an extended time interval. - View Dependent Claims (10, 11, 12, 13, 14, 15)
-
-
16. A computer program product for continuously monitoring the blood pressure of a patient, wherein the computer program product comprises program sections for respectively:
- measuring blood pressures in an artery of the patient during a measurement cycle, wherein a systolic pressure is measured at the beginning of the measurement cycle and a diastolic pressure is measured at the end of the measurement cycle;
detecting blood pressure pulses in the cardio-vasculature of a patient, wherein each pulse has a pulse amplitude;
correlating the systolic pressure measured in the measuring program section with a pulse amplitude detected in the detecting program section; and
identifying variations in pulse amplitudes during the detecting step as indications of variations in corresponding systolic pressures during an extended time interval. - View Dependent Claims (17, 18, 19, 20)
- measuring blood pressures in an artery of the patient during a measurement cycle, wherein a systolic pressure is measured at the beginning of the measurement cycle and a diastolic pressure is measured at the end of the measurement cycle;
Specification