Manual and automatic probe calibration
First Claim
1. A medical sensor comprising:
- a first light emitting element associated with said medical sensor and configured to generate light of a selected wavelength, said first light emitting element in communication with a first signal line and adapted to receive a drive signal on said first signal line;
an information element, said information element also in communication with said first signal line and configured to provide information on said first signal line; and
a detector associated with said medical sensor and responsive to light which originated from said first light emitting element to provide data on a second signal line.
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Accused Products
Abstract
The method and apparatus of the present invention provides a system wherein light-emitting diodes (LEDs) can be tuned within a given range by selecting their operating drive current in order to obtain a precise wavelength. The present invention further provides a manner in which to calibrate and utilize an LED probe, such that the shift in wavelength for a known change in drive current is a known quantity. In general, the principle of wavelength shift for current drive changes for LEDs is utilized in order to allow better calibration and added flexibility in the use of LED sensors, particularly in applications when the precise wavelength is needed in order to obtain accurate measurements. The present invention also provides a system in which it is not necessary to know precise wavelengths of LEDs where precise wavelengths were needed in the past. Finally, the present invention provides a method and apparatus for determining the operating wavelength of a light emitting element such as a light emitting diode.
1392 Citations
30 Claims
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1. A medical sensor comprising:
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a first light emitting element associated with said medical sensor and configured to generate light of a selected wavelength, said first light emitting element in communication with a first signal line and adapted to receive a drive signal on said first signal line; an information element, said information element also in communication with said first signal line and configured to provide information on said first signal line; and a detector associated with said medical sensor and responsive to light which originated from said first light emitting element to provide data on a second signal line. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An information system for a physiological monitor comprising:
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a physiological monitor having a first signal line on which the physiological monitor provides a drive signal and on which the physiological monitor obtains information data; and an information element in communication with said first signal line, said information element configured to provide said information data on said first signal line. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A medical monitor comprising:
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a sensor comprising; a first signal line;
a light emitting element configured to generate light of a selected wavelength in response to a drive current on said first signal line; andan information element in communication with said first signal line to provide information on said first signal line; and a detector responsive to light which originated from said light emitting element; and a processor in communication with said first signal line and in communication with said detector, said processor responsive to said information on said first signal line from said information element and providing said drive current for said light emitting element via said first signal line. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30)
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Specification