Pattern of cuff inflation and deflation for non-invasive blood pressure measurement
First Claim
Patent Images
1. A method of monitoring blood pressure in a subject comprising:
- using a monitor to;
receive a signal from a photoplethysmography sensor positioned proximate to an inflatable blood pressure cuff;
receive a signal from a pressure transducer associated with the inflatable blood pressure cuff;
determine a systolic blood pressure of the subject based on a pressure in the inflatable blood pressure cuff at a first appearance of a plethysmographic waveform in the signal from the photoplethysmography sensor during a linear deflation of the inflatable blood pressure cuff from an oversystolic pressure; and
provide instructions to switch from the linear deflation of the inflatable blood pressure cuff to a stepwise deflation of the inflatable blood pressure cuff after the first appearance of the plethysmographic waveform.
2 Assignments
0 Petitions
Accused Products
Abstract
Embodiments of the present disclosure relate to a system and method for determining a physiologic parameter of a patient. Specifically, embodiments provided herein include methods and systems for non-invasive determination of blood pressure. Information from a photoplethysmography sensor may be used to determine a systolic pressure, which in turn may be used to control a deflation pattern of a blood pressure cuff.
-
Citations
20 Claims
-
1. A method of monitoring blood pressure in a subject comprising:
-
using a monitor to; receive a signal from a photoplethysmography sensor positioned proximate to an inflatable blood pressure cuff; receive a signal from a pressure transducer associated with the inflatable blood pressure cuff; determine a systolic blood pressure of the subject based on a pressure in the inflatable blood pressure cuff at a first appearance of a plethysmographic waveform in the signal from the photoplethysmography sensor during a linear deflation of the inflatable blood pressure cuff from an oversystolic pressure; and provide instructions to switch from the linear deflation of the inflatable blood pressure cuff to a stepwise deflation of the inflatable blood pressure cuff after the first appearance of the plethysmographic waveform. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 20)
-
-
9. A monitor, comprising:
-
an input circuit configured to receive a photoplethysmographic signal and a pressure transducer signal from a pressure transducer associated with an inflatable blood pressure cuff; a memory storing an algorithm configured to calculate a systolic pressure based at least in part on an intracuff pressure at which the photoplethysmographic signal is first detected during a linear deflation of the inflatable blood pressure cuff from an oversystolic pressure and configured to calculate a diastolic pressure based at least in part on a mean arterial pressure determined from a peak pressure amplitude during a stepwise deflation; and a processor configured to execute the algorithm and provide instructions to control deflation of the inflatable blood pressure cuff, wherein a switch between the linear deflation and the stepwise deflation of the inflatable blood pressure cuff is based on a determination of the systolic pressure. - View Dependent Claims (10, 11, 12, 13, 14)
-
-
15. A system for determining non-invasive blood pressure, comprising:
-
a sensor configured to be applied to a subject to acquire photoplethysmographic data and generate a signal relating to the photoplethysmographic data; an inflatable blood pressure cuff configured to be applied to a subject proximate to the sensor; and a monitor configured to; provide instructions to a control system for the inflatable blood pressure cuff to deflate the inflatable blood pressure cuff in a substantially linear manner at pressures greater than a systolic pressure and to deflate the cuff in a stepwise manner at pressures less than the systolic pressure; and determine a pressure in the inflatable blood pressure cuff at which a plethysmographic waveform first appears during deflation from an oversystolic pressure, wherein the pressure correlates to the subject'"'"'s systolic pressure. - View Dependent Claims (16, 17, 18, 19)
-
Specification