What SpO2 Oxygen Level Is Normal for COVID-19 Patients?

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In a patient with COVID-19, SpO₂ levels should stay between 92%-96%. Low oxygen levels that drop below this threshold require medical attention

In a patient with COVID-19, SpO₂ levels should stay between 92%-96%. Low oxygen levels that drop below this threshold require medical attention, as it can result in difficulty breathing and other serious complications.

What is SpO2?

SpO₂ refers to the total percent saturation of oxygen in the blood and peripheral tissues. When monitoring a person with COVID-19, a small pocket device called a pulse oximeter can be used to measure oxygen saturation at home or in a clinical setting. 

The percentage of oxyhemoglobin (oxygen-bound hemoglobin) in the blood is measured as arterial oxygen saturation (SaO₂) and venous oxygen saturation (SvO₂). Oxygen saturation levels are a critical measure to determine blood oxygen content and delivery.

The normal range of SpO₂ in adults is between 95%-100%. Less than 90% is considered low oxygen saturation, and the patient may require oxygen supplementation.

What is the importance of SpO2 levels in COVID-19?

Patients infected with the COVID-19 virus may experience injury to the lungs. The virus damages the alveoli (air sacs) in the lungs and leads to various respiratory complications such as:

• Pneumonia
• Acute respiratory distress syndrome (ARDS)
• Respiratory failure
• Venous thromboembolism
• Increase in bacterial infections
• Pulmonary fibrosis during recovery post-COVID-19 infection

These complications can lead to severe hypoxia, in which the patient loses the ability to breathe normally and must be placed on oxygen support for survival. Hypoxia can cause:

• Headache
• Breathlessness
• Rapid heart rate
• Shortness of breath
• Wheezing
• Confusion
• Bluish discoloration of skin and mucous membranes (cyanosis)

How to manage low SpO2 levels in COVID-19 patients at home

Changing body positions and practicing relaxation techniques can help relieve mild symptoms. In severe hypoxia cases, the patient should be placed on oxygen support either at home or in a hospital.

Changes in position

• Sleeping in a prone position: Face downward and sleep on your stomach. This has been shown to effectively improve SpO2 levels when they fall under 94%.
• Lying on one side: Lie down on one side with pillows supporting your head and neck with your knees slightly bent.
• Leaning forward while sitting and resting on a table: Lean forward from your waist while sitting at a table, with your head and neck resting on a pillow and your arms resting on the table. This may be done without pillows as well.
• Leaning forward while sitting without a table: Lean forward while sitting in a chair and rest your arms on your lap or the armrests.
• Standing and leaning forward: Lean forward onto a windowsill or other sturdy surface while standing.
• Standing with back support: Lean against a wall with your hands resting by your sides, feet slightly apart, and about 12 inches away from the wall.

Relaxation techniques

• Take long and deep breaths
• Practice meditation
• Rest
• Yoga

Oxygen concentrators

In moderate cases of COVID-19, when SpO₂ levels drop and oxygen needs are less than 5 liters per minute, oxygen concentrators can be used. Oxygen support may be necessary to support patients with post-COVID-19 complications.