APPARATUS AND METHOD FOR ENHANCING AND ANALYZING SIGNALS FROM A CONTINUOUS NON-INVASIVE BLOOD PRESSURE DEVICE
First Claim
1. A method for determining a blood pressure contour curve comprising:
- placing a photo-plethysmographic (PPG) system over an artery in a human finger, the PPG system producing a PPG signal based on volume of the artery, the PPG system including at least one light source and at least one light detector;
modifying a component of the PPG signal having a frequency higher than a predefined threshold frequency; and
calculating a blood pressure signal using at least the modified component of the PPG signal.
1 Assignment
0 Petitions
Accused Products
Abstract
A system and method of enhancing a blood pressure signal is disclosed. The volume of an artery in a finger is measured by a photo-plesthysmographic (PPG) system, which produces a PPG signal. This PPG system is placed inside a cuff, and the cuff pressure is controlled by the PPG signal. The portion or component of the PPG signal having a frequency higher than a predefined threshold frequency is then modified or enhanced, such as by multiplying the high frequency component by a calibration factor. A blood pressure signal is then calculated using the cuff pressure and the modified PPG signal. A blood pressure contour curve may then be generated, and a variety of parameters may be calculated using the curve.
-
Citations
22 Claims
-
1. A method for determining a blood pressure contour curve comprising:
-
placing a photo-plethysmographic (PPG) system over an artery in a human finger, the PPG system producing a PPG signal based on volume of the artery, the PPG system including at least one light source and at least one light detector; modifying a component of the PPG signal having a frequency higher than a predefined threshold frequency; and calculating a blood pressure signal using at least the modified component of the PPG signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A computing device for determining a blood pressure contour curve comprising:
-
a pressure cuff adapted to be placed over an artery in a human finger, the cuff including a PPG system having at least one light source and at least one light detector; a pressure sensor; a controller for controlling the pressure in the cuff; wherein the PPG system produces a PPG signal based on volume of the artery, a pressure signal is calculated using the PPG signal, and the pressure signal is applied to the cuff and finger; and wherein the computing device modifies a component of the PPG signal having a frequency higher than a predefined threshold frequency and calculates a blood pressure signal using the cuff pressure and the modified PPG signal. - View Dependent Claims (13, 14, 15, 16, 17, 18, 22)
-
-
19. A method for eliminating undesired signal content of a continuous non-invasive arterial blood pressure device comprising:
-
placing a cuff having a photo-plesthysmographic (PPG) system over an artery in a human finger, the PPG system producing a PPG signal based on volume of the artery, the cuff pressure being controlled by the PPG-signal; eliminating from the PPG signal an undesired portion of the PPG signal; and reconstructing the PPG signal from the remaining portion of the PPG signal. - View Dependent Claims (20, 21)
-
Specification