How Does A Pulse Oximeter Work?
Pulse Oximeter found a spike in their routine use in the wake of COVID-19 pandemic. It is a small clip-like electronic medical device that measures the oxygen present in the blood along with the heart rate and displays it on the device surface screen. Let’s understand the device in better manner.
How to Read a Pulse Oximeter?
This device displays two significant readings on the screen. Oxygen level is displayed as form of percent in SpO2, which is between 0 and 100. Any reading above 90% is considered safe. The heart rate is displayed in units of PRbpm and measures the pulse of heart. The usual safe range is between 60 and 100 beats per minute.
How to use a Pulse Oximeter?
The device should ideally be attached to one of the extremities of body farthest from heart, that is, the fingers or toes. When the clip is securely placed over the finger and the device is turned ON, it begins to show the instantaneous readings within few seconds.
How accurate is a Pulse Oximeter?
These devices are pretty accurate with error possibility of 2%. Difference in readings may occur due to other objects covering the finger such as nail paint, gloves, or due to improper placing of finger around sensor.
How to put Pulse Oximeter on a baby?
Newborn babies are known to curl their fingers into a firm grip; hence, their fingers are usually taped on to the Pulse Oximeter. It is advised to put the baby’s middle finger of right hand in the slot of the device. Then, gently close the clip and turn the device ON. The readings are immediately shown on the screen.
Which finger should be used to measure readings on a Pulse Oximeter?
As per popular trends, the middle finger on right hand shows the best and most accurate readings for the test of Oxygen level and Heart Rate. Smokers need to consult doctors as their readings are shown higher than actual due to presence of Carbon Mono-Oxide.
How does a Pulse Oximeter measures Heart Rate?
When the finger is placed properly in the slot of the device and it is turned ON, visible light signals are passed through the sensor present. The transmitter sends the signal which is measured by receiver. The difference in intensity is measured by checking the variation in intensity, which finally displays the heart rate.
How does a Pulse Oximeter measures Oxygen?
When the finger is placed properly in the slot of the device and it is turned ON, visible light signals are passed through the sensor present. The transmitter sends the signal which is measured by receiver. The difference in intensity is measured by checking the Oxygen content, which finally displays the percent of saturation in Oxygen level.
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