Light transmission simulator for pulse oximeter
First Claim
1. An oxygenated tissue simulator adapted to test a pulse oximeter with one or more interrogating light signals, the interrogating light signals comprising a red light signal and an infrared light signal, the tissue simulator comprising:
- one or more detectors adapted to convert the red light signal and infrared light signal of the pulse oximeter into at least one electrical signal;
one or more light sources adapted to convert the at least one electrical signal into at least one carrier light signal;
means for modulating the at least one carrier light signal to simulate oxygenated tissue; and
means for transmitting the at least one modulated carrier light signal to the pulse oximeter.
1 Assignment
0 Petitions
Accused Products
Abstract
A living tissue light transmission simulator system (208, 308) includes receptors of light (215, 216, 315, 316) in portions of the infrared and red spectral bands and the receptors (215, 216, 315, 316), together with amplification (217, 218, 317, 318), infrared detection (239, 371), spectral separation circuitry (219, 319), and post-separation amplification (220, 221, 338, 339, 340, 320, 321), that may be used to drive at least one light source (222, 223, 322, 361). The living tissue light transmission simulator system (208, 308) includes at least one shutter (225, 235, 324, 363, 450) to mechanically modulate generated light from the at least one driven light source (222, 223, 322, 361) where the modulated light may be directed to a pulse oximeter.
28 Citations
9 Claims
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1. An oxygenated tissue simulator adapted to test a pulse oximeter with one or more interrogating light signals, the interrogating light signals comprising a red light signal and an infrared light signal, the tissue simulator comprising:
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one or more detectors adapted to convert the red light signal and infrared light signal of the pulse oximeter into at least one electrical signal; one or more light sources adapted to convert the at least one electrical signal into at least one carrier light signal; means for modulating the at least one carrier light signal to simulate oxygenated tissue; and means for transmitting the at least one modulated carrier light signal to the pulse oximeter. - View Dependent Claims (2, 3, 4)
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5. A living tissue light transmission simulator comprising an optical waveguide, the simulator further comprising:
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an infrared receiving element sensitive in at least a portion of the infrared light spectrum wherein the infrared receiving element is adapted to output one or more electrical signals in response to sensed infrared light; a broadband receiving element sensitive in a least a portion of the infrared and red light spectrum wherein the broadband receiving element is adapted to output one or more electrical signals in response to sensed broadband light; a separator circuit adapted to separate from the output signal of the broadband receiving element an infrared component signal and a red light component signal wherein the separator circuit is adapted to output the separated infrared component signal and the separated red light component signal; a first voltage-to-current amplifier, responsive to the separator circuit infrared component output signal, having an output signal adapted to drive a first light emitting diode (LED); and a first shutter interposed in a light path between the first LED and the optical waveguide, wherein the first shutter is responsive to one or more actuating signals from a processing unit and wherein the first shutter is adapted to mechanically modulate the light emitted from the first LED. - View Dependent Claims (6, 7, 8, 9)
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Specification