The Accuracy and Reliability of Pulse Oximeters

Pulse Oximeters offer the ability to measure pulse rates and blood oxygen levels and some even offer the ability to measure carbon monoxide levels. These measurements can be strong indicators of many different health issues and of the standard of our levels of health. Given the importance of the measurements provided, we need to be able to rely on the accuracy and reliability of the results. 

Causes of inaccurate readings

There are some instances which can cause a finger pulse oximeter to produce inaccurate or even no readings at all. These include excessive movement while the oximeter is attached, vibrations, wearing nail polish, calloused skin, anemia, cold limbs, and the presence of carbon monoxide. A key means of measuring the accuracy of your pulse oximeter results is to measure your pulse rate manually and compare the results. Even if your device is showing a normal result, you should still compare this with a manual pulse rate just to be sure. Of course, if the sensor is not correctly applied, an inaccurate reading may also be produced.

How to get an accurate reading

To ensure an accurate reading from a finger Pulse Oximeter, you must do the following - rest your hand at chest level in line with your heart, with the finger to which the device is attached to pointing in the air and stay like this until a reading has been obtained. Ensure that the light does not reach the detector other than through your skin tissue. Ensure that your finger is fully inserted into the device and that the device is attached securely and correctly. If you struggle to get a reading, try to warm up your finger or apply a topical cream. Failing that, you may want to attach a pulse ox to a different area of the body such as the bridge of your nose or your earlobe.