How to Use Pulse Oximetry

A pulse oximetry is a device that can provide a measurement of the amount of oxygen in a person’s blood. A sensor on the device is attached to a patient's finger to provide a reading. It’s important to determine the amount of oxygen in a persons blood for a variety of reasons. A low oxygen reading can be a sign of an illness or injury. Pulse oximetry is used in hospitals, doctor offices and are available for home use. Once purchased it’s important that an individual learn how to correctly use the pulse oximetry to get an accurate reading.

Instructions

1. Take off any nail polish. The pulse oximetry does not work as effectively if placed on a finger with nail polish.

2. Place the device on a finger. There are different types of finger probes. Some wrap around the finger. It’s important the finger comes in contact with the sensor which is usually indicted by a red light. The index finger or ring finger usually work best.

3. Stay still and wait for a reading. Moving your hand, fingers or arm will interfere with getting an accurate reading. Rest your arm on something firm to prevent it from moving. Remain still until a number appears on the device.

4. Be patient. The sensor may take anywhere from a few seconds to a minute to determine a reading. Some devices will have a green light flashing which indicates the sensor is working and will give a readout. If the light is flashing red it may indicate the device cannot get a reading.

5. Understand results. The amount of oxygen in the blood is given in a percentage. For example, if the reading is 100 percent your blood is saturated with oxygen at 100 percent which is as high as it can get. Most people who are healthy will have a reading of 90 percent or greater.

6. Use the pulse oximetry several days in a row to determine your baseline. Some individuals especially with lung problems may have a lower level of oxygen in their blood and a lower reading. It’s important to take a reading daily and determine what is normal for you.

Tips & Warnings

• Be aware some pulse oximetry have a sensor that can be placed on the toe or an ear. This may work better for children.

• Cold fingers may not be able to get a reading. Warm the hand by placing a warm towel on it for a few minutes and try to get a reading again.

• Very poor circulation will effect the ability for the sensor to pick up a reading.