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What should I know about Blood Oxygen Levels and what is an Oximeter and how do I use it? (Part1.)

 Oxygen is essential for life. Every cell in our body requires a constant supply of oxygen to function correctly. When the body is deprived of oxygen, even for a short period, it can lead to serious health complications and, in severe cases, can be life-threatening. Monitoring blood oxygen levels is crucial for maintaining overall health and well-being.

Presented by Metulas Supplements.

In part 1 of this comprehensive blog, we'll explore the importance of blood oxygen levels and how they are measured using a finger oximeter to monitor oxygen levels in the blood. Look put for Part 2 – in which we will discuss the role of supplementation in supporting healthy levels of oxygen in the blood.

Understanding Blood Oxygen Levels:

Before we dive into the role of finger oximeters, let's first understand what blood oxygen levels are and why they are essential for our health.

What are Blood Oxygen Levels?

Blood oxygen levels, also known as oxygen saturation or SpO2, measure the percentage of oxygen-bound haemoglobin in the blood. Oxygen is carried by red blood cells, which transport it from the lungs to the rest of the body. The body's tissues and organs need a continuous supply of oxygen to function correctly.

The Importance of Blood Oxygen Levels:

Maintaining adequate blood oxygen levels is crucial for the following reasons:

  1. Cellular Respiration: Oxygen is essential for cellular respiration, the process by which cells produce energy. Without an adequate supply of oxygen, cells cannot function correctly, leading to a decline in overall health.

  2. Organ Function: Vital organs such as the brain, heart, and kidneys require a constant supply of oxygen to function correctly. Reduced oxygen levels can impair organ function and lead to serious health complications.

  3. Physical Performance: Oxygen is also essential for physical performance and endurance. During exercise, the body requires more oxygen to meet the increased demand for energy. Optimal blood oxygen levels can improve athletic performance and recovery.

What is a Finger Oximeter?

A finger oximeter, also known as a pulse oximeter, is a small, portable device used to measure blood oxygen levels quickly and painlessly. It works by emitting light waves through the skin and measuring the amount of light absorbed by oxygen-bound haemoglobin in the blood. The device then calculates the percentage of oxygen saturation based on the amount of light absorbed.

How Does a Finger Oximeter Work?

Finger oximeters utilize a technology called photoplethysmography (PPG) to measure blood oxygen levels. Here's how it works:

  1. LED Light: The oximeter emits two different wavelengths of light, usually red and infrared, through the skin.

  2. Light Absorption: Oxygen-bound haemoglobin absorbs more infrared light, while deoxygenated haemoglobin absorbs more red light. By measuring the amount of light absorbed by the blood, the oximeter can determine the oxygen saturation level.

  3. Calculation: The oximeter calculates the percentage of oxygen saturation (SpO2) based on the ratio of oxygen-bound haemoglobin to total haemoglobin in the blood.

  4. Display: The results are displayed on the oximeter's screen within a few seconds.

Benefits of Using a Finger Oximeter:

  1. Quick and Painless: Finger oximeters provide fast and painless measurements of blood oxygen levels, making them ideal for use at home or in clinical settings.

  2. Portable and Convenient: Finger oximeters are small, lightweight, and portable, allowing users to monitor their oxygen levels anywhere, anytime.

  3. Non-Invasive: Unlike arterial blood gas sampling, which requires a blood sample from an artery, finger oximetry is non-invasive and does not require puncturing the skin.

  4. Early Detection of Hypoxemia: Finger oximeters can detect low blood oxygen levels (hypoxemia) early, allowing for prompt intervention and treatment.

Who Can Benefit from Using a Finger Oximeter?

  1. People with Respiratory Conditions: Individuals with respiratory conditions such as chronic obstructive pulmonary disease (COPD), asthma, or sleep apnoea can use a finger oximeter to monitor their blood oxygen levels regularly.

  2. Athletes and Fitness Enthusiasts: Athletes and fitness enthusiasts can use a finger oximeter to monitor their oxygen saturation levels during exercise and ensure optimal performance and recovery.

  3. Individuals at High Altitudes: People living or traveling to high-altitude areas, where oxygen levels are lower, can use a finger oximeter to monitor their blood oxygen levels and prevent altitude sickness.

  4. Patients in Clinical Settings: Finger oximeters are commonly used in clinical settings, such as hospitals, emergency rooms, and ambulances, to monitor patients' oxygen levels continuously.

How to Use a Finger Oximeter:

  1. Prepare the Device: Insert the batteries into the oximeter and turn it on.

  2. Insert Finger: Place your finger, typically the index finger, into the oximeter's sensor.

  3. Wait for Reading: Wait a few seconds for the oximeter to measure your blood oxygen levels.

  4. Read the Results: The oximeter will display your oxygen saturation level (SpO2) as a percentage on the screen.

  5. Record the Results: Record the results for future reference, especially if you are monitoring your oxygen levels over time.

Interpreting Finger Oximeter Readings:

Understanding your finger oximeter readings is essential for monitoring your blood oxygen levels accurately. Here's what the numbers mean:

  • Normal SpO2: A normal blood oxygen level (SpO2) is typically between 95% and 100%.

  • Mild Hypoxemia: SpO2 levels between 90% and 95% may indicate mild hypoxemia (low blood oxygen levels).

  • Moderate Hypoxemia: SpO2 levels between 85% and 90% may indicate moderate hypoxemia.

  • Severe Hypoxemia: SpO2 levels below 85% may indicate severe hypoxemia and require immediate medical attention.

Tips for Using a Finger Oximeter:

  1. Ensure Proper Placement: Make sure your finger is inserted correctly into the oximeter's sensor for accurate readings.

  2. Avoid Movement: Keep your hand still and avoid movement while the oximeter is measuring your blood oxygen levels.

  3. Take Multiple Readings: Take multiple readings and record the average result for greater accuracy.

  4. Monitor Regularly: If you have a chronic health condition or are at risk of low blood oxygen levels, monitor your oxygen saturation regularly.

Maintaining optimal blood oxygen levels is crucial for overall health and well-being. A finger oximeter is a valuable tool for quickly and painlessly measuring blood oxygen levels at home or in clinical settings. By monitoring your blood oxygen levels regularly and taking appropriate action if levels are low, you can help ensure that your body receives an adequate supply of oxygen for optimal function and vitality. With the convenience and accuracy of a finger oximeter, you can take control of your health and well-being with ease. So why not invest in a finger oximeter today and take the first step towards better health and peace of mind?

Remember, your health is in your hands, and a finger oximeter can help you stay informed and proactive about your well-being!

Metulas Supplements is a British brand committed to delivering top-quality amino acid-based Food Supplement Drink Mixes and complementing products. A family-owned business that prides itself on its dedication to scientific research and product quality. Every formulation offered has been created by a team of expert nutritionists and scientists and every line of production undergoes rigorous test and quality control procedures, ensuring every tub meets the highest standards of efficacy and safety; and most importantly the formulations do what they say they are going to do! All Metulas Supplements Food Supplement Drink Mixes are made in the UK - a country recognised for its world class manufacturing. The team are committed to customer satisfaction and customer support. If you have any questions relating to any information in these blogs or would like to know more about the products of Metulas Supplements or have any questions at all - head over to and drop us a line!


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