Normal Pulse Oximetry Range

Written by george chavez
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Pulse oximetry measures the amount of oxygen in a person's system and presents it as a percentage. This helps the health care provider or other ancillary staff to quickly see how well a person is able to utilise the oxygen she is breathing in. It is usually expressed as "Sa02," which means a measure of the level of oxygenation saturation of a person. Sa02 can easily be monitored by a small clip that is attached to the end of a finger or even an ear lobe. It is fast and painless, and tells a lot about a person's physical condition.

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Levels of Oxygen Saturation

The usual desired baseline range of oxygenation saturation, or Sa02, is anywhere from 90 per cent at its lowest to ideally 100 per cent. Anything over 90 per cent usually means the person being tested is not in a dire respiratory status.

Utility of Sa02

In a health care setting, a doctor may write orders to monitor a patient's oxygen levels. His orders might read "keep Sa02 greater than or equal to 95 per cent." A nurse, in this example, would know that this means that the doctor wants the oxygen level of the patient to be maintained at no lower than 95 per cent, which can be achieved by adding supplemental oxygen if need be.

Levels of Sa02

The first measure is usually taken using room air. This gives a baseline as to the respiratory status of the patient. It tells caregivers whether the patient is doing well just breathing the oxygen in the room or needs supplemental oxygen if the Sa02 is less than 90 per cent. Or perhaps the patient needs what is called a "breathing treatment" to help clear the lungs in order for the patient to use oxygen in the room more efficiently.

Patients Already on Oxygen

If a patient requires oxygen in a non-hospital setting, it is referred to as "home oxygen." And if his Sa02 is 90 per cent or less on the oxygen at the level he uses, then some action will be needed to bring his Sao2 up. Sometimes this is accomplished by increasing the level of oxygen he is receiving or undergoing breathing treatment--or both. The desired outcome is an Sao2 greater than 90 per cent and comfortable breathing patterns in the patient.

Oxygen Delivery Systems

Oxygen can be delivered to the patient via room air, a nasal canula, a simple oxygen mask, a venturi mask or a special mask called a non-rebreather. These are listed in cases of severity of oxygen depletion. The simplest is room air and the most serious is using a non-rebreather mask.

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