A finger plethysmograph uses a light emitting diode and a photoelectric cell to detect changes in finger volume.
Measuring oxygen saturation with pulse oximetry quizlet.
Oxygen saturation should always be above 95 percent.
During a pulse oximetry reading a small clamp like device is placed on a finger earlobe or toe.
Pulse oximeters combine the principles of oximetry and plethysmography to noninvasively measure oxygen saturation in arterial blood what does a finger plethysmograph detect.
It is an easy painless measure of how well oxygen is being sent to parts of your body furthest from your heart such as the arms and legs.
Pulse oximetry is a test used to measure the oxygen level oxygen saturation of the blood.
However oxygen saturation may be lower if you have a respiratory disease or congenital heart disease.
Small beams of light pass through the blood in the finger measuring the amount of oxygen.
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Calculate the percentage of your blood that is carrying oxygen.
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In medical shorthand you may hear it called a pao 2 when using a blood gas and an o 2 sat spo2 when using a pulse ox.
Pulse oximetry is a simple cheap and noninvasive procedure used to measure the level of oxygen or oxygen saturation in the blood.
A measurement of your blood oxygen is called your oxygen saturation level.
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