What is Pulse Oximeter ?

A pulse oximeter is a device that is usually placed on the fingertips. It uses beams of light to estimate the oxygen saturation and pulse rate of the blood. Oxygen saturation gives information about the amount of oxygen carried in the blood. A pulse oximeter can estimate the amount of oxygen in the blood without taking a blood sample.

What is Pulse Oximeter Use?

In more detail, a pulse oximeter is a small, lightweight device used to monitor the amount of oxygen in the body. This non-invasive tool painlessly attaches to your fingertip, sending two wavelengths of light through the finger to measure your pulse rate and how much oxygen is in your body. Once the oximeter completes its assessment, its screen will display your current pulse rate along with the percentage of oxygen coming from your heart to your blood. This article will explain the importance of the measurements provided by a pulse oximeter and how they affect you.

What are the 2 readings on a pulse oximeter?

Most pulse oximeters show two or three numbers. The most important number, the oxygen saturation level or blood oxygen level, is usually abbreviated SpO2 and is presented as a percentage.

The second is Pulse rate (similar to heart rate) is abbreviated as PR, and sometimes a third number for signal strength which is known as perfusion index or PI in pulse oximeter.

Blood Oxygen level values ​​are between 95% and 100% for most healthy individuals, but can sometimes be lower in people with lung problems. The blood oxygen level is also usually slightly lower for those living at higher altitudes.


1- Blood Oxygen Level (SpO2)

Your SpO2 reading is an estimate of the amount of oxygen in your blood. A SpO2 reading of 95% or higher is usually considered a normal oxygen level. However, a SpO2 reading of 92% or less (at sea level) suggests that your blood is poorly saturated. Inadequate saturation can lead to a number of adverse health conditions – including chest pain, shortness of breath, and increased heart rate.

2- Pulse rate

Your pulse rate is an estimate of how many times your heart beats per minute. According to the Mayo Clinic, the normal pulse rate value for adults is between 60 and 100 beats per minute (bpm). In general, a lower resting heart rate means more efficient heart function and better cardiovascular fitness. For some people, a pulse rate below 60 bpm indicates abnormally slow heart function, also known as bradycardia. Bradycardia can cause a number of problematic symptoms – including fainting, fatigue, chest pain, and memory problems.

How to use Pulse oximeter, How to Take Oximeter Reading ?

  • Step 1: Remove any nail polish/false nails and warm your hand while it is cool.
  • Step 2: Rest at least 5 minutes before taking your measurements.
  • Step 3: Place your hand on your chest at heart level and keep it steady.
  • Step 4: Turn on the oximeter and hold it on your middle or index finger.
  • Step 5: Reading takes time to stabilize, if reading is not stable hold the oximeter for at least a minute or more.
  • Step 6: Record the highest result when it hasn’t changed for 5 seconds.
  • Step 7: Identify each reading carefully.
  • Step 8: Start Recording from Baseline and Record Three Times a Day at the Same Time. If you feel a change in your health, take additional measures.


What is Pi in Pulse Oximeter?

PI in Pulse Oximeter represents Perfusion Index which shows the pulse strength is weak or strong. The higher the Perfusion Index PI in the pulse oximeter, the better the reading from the oximeter machine would be.
The normal perfusion index (PI) ranges from 0.02% to 20% indicating weak to strong pulse strength.

Poor Perfusion: If the perfusion index is 0.4% or less indicating weak pulse strength, the oximeter reading may be unreliable. Peripheral artery disease, diabetes, obesity, blood clots, etc are the reasons for poor perfusion.

Pulse Oximeter Price ?

Pulse oximeter prices usually depend on their brand and the quality and accuracy of the product. It costs somewhere between 500Rs to 3000Rs. Here are some of the best Recommendations for Pulse Oximeter in the market which are Accurate and as well as affordable.

1- Dr. Trust Signature Series Finger Tip Pulse Oximeter.

2- AccuSure Fingertip pulse oximeter with OLED Display.

3- Vandelay Pulse Oximeter Fingertip C101H1 – Blood Oxygen Meter SpO2 & Pulse Monitor.

4- Dr. Trust Professional Series Finger Tip Pulse Oximeter With Audio Visual Alarm and Respiratory Rate.


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