Implantable hemodynamic monitor and methods for use therewith
First Claim
1. For use in an implantable system including an implantable photoplethysmography (PPG) sensor, a method for determining a surrogate of cardiac afterload (CA) in a subject, comprising:
- (a) obtaining an arterial PPG waveform measurement using the implantable PPG sensor implanted in the subject;
(b) determining a metric of a terminal portion of the arterial photoplethysmography (PPG) waveform, wherein the terminal portion is from a maximum of the arterial PPG waveform to the following minimum of the PPG waveform; and
(c) determining the surrogate of CA in the subject as a function of the metric of the terminal portion of the arterial PPG waveform in step b) based on the measured arterial PPG waveform by the implanted PPG sensor.
1 Assignment
0 Petitions
Accused Products
Abstract
Provided herein are implantable systems that include an implantable photoplethysmography (PPG) sensor, which can be used to obtain an arterial PPG waveform. In an embodiment, a metric of a terminal portion of an arterial PPG waveform is determined, and a metric of an initial portion of the arterial PPG waveform is determined, and a surrogate of mean arterial pressure is determined based on the metric of the terminal portion and the metric of the initial portion. In another embodiment, a surrogate of diastolic pressure is determined based on a metric of a terminal portion of an arterial PPG waveform. In a further embodiment, a surrogate of cardiac afterload is determined based on a metric of a terminal portion of an arterial PPG waveform.
55 Citations
4 Claims
-
1. For use in an implantable system including an implantable photoplethysmography (PPG) sensor, a method for determining a surrogate of cardiac afterload (CA) in a subject, comprising:
-
(a) obtaining an arterial PPG waveform measurement using the implantable PPG sensor implanted in the subject; (b) determining a metric of a terminal portion of the arterial photoplethysmography (PPG) waveform, wherein the terminal portion is from a maximum of the arterial PPG waveform to the following minimum of the PPG waveform; and (c) determining the surrogate of CA in the subject as a function of the metric of the terminal portion of the arterial PPG waveform in step b) based on the measured arterial PPG waveform by the implanted PPG sensor. - View Dependent Claims (2, 3, 4)
-
Specification