Home Pulse Oximetry: A Guide to Understanding Readings

A pulse oximeter with a digit probe is a portable machine which permits the indirect measurement of oxygen saturation. It is available at medical supply stores and on the web for in-home use.

Interpreting Values

• Oxygen saturation refers to the amount of oxygen attached to hemoglobin, which is the oxygen transporting component of red blood cells. Pulse oximetry identifies hemoglobin saturation and pulse oximetry readings are referred to as SaO2, or SPO2 (arterial oxygen saturation). Normal readings range between 95 and 100 percent. Results lower than 91 percent are considered an emergency and require immediate treatment. When the SaO2 is below 85 percent, body tissues have a difficult time becoming oxygenated.

Function

• A portable pulse oximeter with digit probe is a noninvasive assessment to measure respiratory status. The pulse oximeter uses a wave of infrared light and a sensor. A client will place his finger (clean hands, without nail polish) in the probe and within a matter of seconds the SaO2 reading will be displayed.

Benefits

• This method can detect desaturation (a lowering of oxygen saturation) before symptoms are apparent. The pulse oximeter and necessary treatments should be used according to the instructions of a qualified medical professional, and abnormal results should be reported and treated immediately.