Sensor identification method and system
First Claim
1. A method using a photoplethysmographic system, comprising:
- releaseably interconnecting a photoplethysmographic sensor to a photoplethysmographic monitor, wherein a first pair of terminals on said sensor is connected for receiving first drive signals from said monitor for illuminating a first light source coupled between said first pair of terminals, wherein a second pair of terminals on said sensor is connected for receiving second drive signals from said monitor for illuminating a second light source coupled between said second pair of terminals, wherein a third pair of terminals on said sensor is connected for receiving an interrogation signal from said monitor for application across an identification element coupled between said third pair of terminals, and wherein said first second and third connections each utilize a unique combination of terminals and wherein each said first second and third terminal pairs includes at least one terminal included in another of said first second and third terminal pairs;
applying an interrogation signal across said third pair of terminals to obtain an output signal from said identification element; and
utilizing said output signal to identify said sensor.
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Accused Products
Abstract
An inventive method and system are provided for identifying a compatible photoplethysmographic sensor when interconnected to a given photoplethysmographic monitor. The method and system may further provide for the identification of which of a plurality of compatible sensors is interconnected to allow for selective calibration of the photoplethysmographic monitor. In this regard, the system and method may entail provision of a predetermined drive or test signal to a light source and/or identification element (i.e., sensor elements) of a photoplethysmographic sensor, and the obtainment of a corresponding output signal for use in sensor identification. In one approach, an output signal is obtained from at least one of three sensor elements each of which is interconnected between a different pair of sensor terminals which is a unique combination of two of four sensor terminals on the sensor. In this regard, individual circuits may be formed through each sensor element allowing for enhanced flexibility in signal application.
32 Citations
43 Claims
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1. A method using a photoplethysmographic system, comprising:
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releaseably interconnecting a photoplethysmographic sensor to a photoplethysmographic monitor, wherein a first pair of terminals on said sensor is connected for receiving first drive signals from said monitor for illuminating a first light source coupled between said first pair of terminals, wherein a second pair of terminals on said sensor is connected for receiving second drive signals from said monitor for illuminating a second light source coupled between said second pair of terminals, wherein a third pair of terminals on said sensor is connected for receiving an interrogation signal from said monitor for application across an identification element coupled between said third pair of terminals, and wherein said first second and third connections each utilize a unique combination of terminals and wherein each said first second and third terminal pairs includes at least one terminal included in another of said first second and third terminal pairs;
applying an interrogation signal across said third pair of terminals to obtain an output signal from said identification element; and
utilizing said output signal to identify said sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A photoplethysmographic monitoring system, comprising:
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a photoplethysmographic sensor including;
a first light source interconnected between a first pair of sensor terminals;
a second light source interconnected between a second pair of sensor terminals; and
an identification element interconnected between a third pair of sensor terminals, wherein each of said pairs of sensor terminals comprises a unique combination of sensor terminals and wherein each said first second and third pairs of sensor terminals includes at least one terminal included in another of said first second and third pairs of sensor terminals;
a photoplethysmographic monitor removeably interconnectable to each of said first, second and third pairs of sensor terminals, said monitor operative to selectively apply predetermined signals to a first terminal of each of said pairs of sensor terminals and obtain an output signal at a second terminal of each of said pairs of sensor terminals; and
a processor operatively associated with said monitor operative to utilize at least one said output signal to identify said sensor. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 43)
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42. The system of claim 42, wherein said processor is operative to utilize said detector output signal to compute at least one blood analyte concentration value.
Specification