Most people had heard about pulse oximeters only via TV shows where EMTs shout out a patient`s "pulse ox". But when many news reports mentioned pulse oximeters as a tool in the limited arsenal of weapons against coronavirus, this medical device started flying off shelves.
Typically covered by a finger, a pulse oximeter transmits light from sensors on the top of the oximeter and passes the finger to sensors on the bottom. After a few seconds, it will calculate how much oxygen is being transported through the bloodstream and displays the results as a percentage (abbreviated SpO2). Doctors consider a reading of 94 percent and higher to be normal. The low percentage of oxygen in the blood can cause low levels of oxygen in the body, which can lead to death.
Pulse oximeters are usually used by people who want or need to monitor their oxygen supply at home, including patients with chronic lung conditions such as COPD, performance athletes, or people living at high altitudes. Shortly after the COVID-19 pandemic started, the easy-to-use devices began being touted as a means to detect serious complications from COVID-19, the disease the virus causes.
Why pulse oximeters is so popular? Because COVID-19 has a fairly significant effect on the body`s ability to oxygenate, sometimes discordant with how the patient feels. Though patients aren`t especially short of breath, the low blood oxygen levels may indicate they are headed for a crisis.
Many pulse oximeters must be wearable device that needs to use without a power line, so a low-power consumptive OLED is the best choice for it.
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