If you have coronavirus disease (COVID-19).If you’ve recently injured your head or neck, which can affect your breathing.(A newborn baby may also need a blood oxygen test if they are having trouble breathing). Your healthcare provider may have you undergo a blood oxygen level test if you’re experiencing any of the following acute (sudden and serious) conditions: Why do I need to have my blood oxygen level tested? You can also use a pulse oximeter at home - you can usually buy one from a pharmacy or certain stores and websites. Healthcare providers use pulse oximeters frequently in hospitals. It’s a quick and harmless way to check if someone’s blood oxygen level is too low. An oximeter reading only indicates what percentage of your blood is saturated with oxygen, known as the SpO2 level, as well as your heart rate. Pulse oximetryĪ pulse oximeter can also measure blood oxygen saturation levels through a small clip that’s usually placed on your finger or toe. Having too much or too little acid in your blood can be harmful to your health. The test also checks the balance of acids and bases, known as the pH balance, in your blood. An ABG test measures the level of oxygen and carbon dioxide in your blood. Healthcare providers can measure your blood oxygen level as part of a larger test known as an arterial blood gas (ABG) test. A blood draw test provides much more information about your oxygen levels than an oximeter does.
There are two main ways to measure or test blood oxygen levels: through a blood draw test and through pulse oximetry (using an oximeter). Low blood oxygen levels indicate that your lungs and/or circulatory system may not be working as they should. Your body tightly regulates the amount of oxygen saturation in your blood, because low blood oxygen levels ( hypoxemia) can lead to many serious conditions and damage to individual organ systems, especially your brain and heart. Your bloodstream then carries the carbon dioxide back to your lungs, and you breathe it out (exhale it) through your mouth or nose. Once your cells use oxygen, they create carbon dioxide. All of your cells need oxygen to create energy efficiently, and your body needs energy to fulfill all of its processes, such as digestion and even thinking. Once in your bloodstream, the oxygen then goes to cells all over your body. Oxygen enters your body through your nose or mouth when you breathe (inhale) and passes through your lungs into your bloodstream. Oxygen is essential to life, and our bodies need a certain amount of oxygen to function properly. Your blood oxygen level (blood oxygen saturation) is the amount of oxygen you have circulating in your blood.
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