Perfusion index smoother
First Claim
Patent Images
1. A method performed on a processor of smoothing a perfusion index measurement displayed in an oximeter system, the method comprising:
- establishing a baseline perfusion index during quality signal conditions of a signal responsive to intensity signals acquired from a detector capable of detecting light attenuated by body tissue, anddisplaying a single value of perfusion index, the single value being the baseline perfusion index if a current signal includes motion-induced noise and a current PI derived from the current signal is not lower than the baseline PI, otherwise the single value being the current perfusion index.
4 Assignments
0 Petitions
Accused Products
Abstract
An embodiment of the present disclosure seeks to smooth a perfusion index measurement through use of a baseline perfusion index measurement and/or through the use of multiple PI calculations. The combination of the baseline perfusion index measurement reduces an error between a calculated measurement of PI and actual conditions.
528 Citations
6 Claims
-
1. A method performed on a processor of smoothing a perfusion index measurement displayed in an oximeter system, the method comprising:
-
establishing a baseline perfusion index during quality signal conditions of a signal responsive to intensity signals acquired from a detector capable of detecting light attenuated by body tissue, and displaying a single value of perfusion index, the single value being the baseline perfusion index if a current signal includes motion-induced noise and a current PI derived from the current signal is not lower than the baseline PI, otherwise the single value being the current perfusion index. - View Dependent Claims (2, 3, 4)
-
-
5. An oximeter comprising:
-
an input capable of receiving intensity signal data responsive to intensity signals acquired from a detector capable of detecting light attenuated by body tissue, a memory storing a baseline Perfusion Index (PI); and a processor programmed to display a single value of PI, said single value being said baseline PI if a current signal data includes motion-induced noise and a current PI derived from said current signal data is not lower than said baseline PI, otherwise said single value being said current PI. - View Dependent Claims (6)
-
Specification