Use,LED,and,Photodiode,Pulse,O business, insurance Use of LED and Photodiode in Pulse Oximetry
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A pulse oximeter is a particularly convenient noninvasive measuPulse-oximetrytechnology was available in 1930's it became easily available only inthe 1980's with advances in the Light Emitting Diode (LED),microprocessors, optical plethysmography and spectro-photometry.Today pulse-oximetry provides a simple, non-invasive, portable andinexpensive method to continuously monitor oxygen saturation andheart rate with good accuracy. Pulseoximetry is a non-invasive and continuous method of determining theamount of oxygenated and deoxygenated hemoglobin in a personsblood supply.A pulse oximeter is a particularlyconvenient noninvasive and measurement instrument. It has a pair ofsmall light-emitting diodes (LEDs) facing a photodiode through atranslucent part of the patient's body, usually a fingertip or anearlobe. One LED is red, with wavelength of 660 nm, and the other isinfrared, 905, 910, or 940 nm. Absorption at these wavelengthsdiffers significantly between oxyhemoglobin and its deoxygenatedform, therefore from the ratio of the absorption of the red andinfrared light the oxy /deoxyhemoglobin ratio can be calculated. Theabsorbance of oxyhemoglobin and deoxyhemoglobin is the same(isosbestic point) for the wavelengths of 590 and 805 nm; earlieroximeters used these wavelengths for correction for hemoglobinconcentration.Usesof pulse oximetry--This helps clinician in -Noninvasive arterial oxygen saturation monitoring. -Pulse rate monitoring. -Trending of saturation and pulse rate Electronic Engineering Services
Use,LED,and,Photodiode,Pulse,O