Arterial blood flow simulator
First Claim
1. An arterial blood flow simulator comprisinga body comprising material at least partially transparent to red and infrared lights, signal generating means for generating an electric signal having an amplitude corresponding to a given arterial blood flow oxygenation, and said body further comprising light valve means including polymer dispersed liquid crystal material responsive to said electronic signal for varying the amount of light passing through said body, whereby said body will simulate the light absorption of an appendage of the human body having an arterial blood flow passing therethrough where said arterial blood flow has a given percentage of oxygenation of the hemoglobin.
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Abstract
An artificial blood flow simulator to be used to test or calibrate a pulse oximeter has a body which is at least partially transparent to red and infrared light waves. Within the body is a light valve which is responsive to an electronic signal for varying the amount of light passing through the body. Connected to the light valve is a signal generator for generating a pulsating electronic signal which corresponds to a given blood flow. The device has the permeability of a human appendage between pulses of blood in the arterial system when the signal generator is generating an electronic pulse and has the permeability of an appendage having arterial blood flowing therethrough when the signal generator is not generating an electronic pulse.
93 Citations
7 Claims
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1. An arterial blood flow simulator comprising
a body comprising material at least partially transparent to red and infrared lights, signal generating means for generating an electric signal having an amplitude corresponding to a given arterial blood flow oxygenation, and said body further comprising light valve means including polymer dispersed liquid crystal material responsive to said electronic signal for varying the amount of light passing through said body, whereby said body will simulate the light absorption of an appendage of the human body having an arterial blood flow passing therethrough where said arterial blood flow has a given percentage of oxygenation of the hemoglobin.
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6. An arterial blood flow simulator comprising,
a body comprising material at least partially transparent to red and infrared lights, signal generating means for generating an electric signal having a frequency corresponding to a given blood flow rate, and said body further comprising a light valve including polymer dispersed liquid crystal material responsive to said electronic signal for varying the amount of light passing through said body whereby said body will simulate the light absorption of an appendage of the human body having a given arterial blood flow rate passing therethrough.
Specification