How much oxygen can a nasal cannula deliver?

A nasal cannula is a commonly used device for delivering supplemental oxygen to patients who require oxygen therapy. The correct answer indicates that a nasal cannula can deliver oxygen effectively within the range of 1 to 6 liters per minute.

At flow rates of 1 to 2 liters per minute, the nasal cannula can provide approximately 24% to 28% oxygen concentration. As the flow increases to 4 to 6 liters per minute, the concentration of oxygen delivered can rise to around 36% to 44%. This range makes it particularly useful for patients who have mild to moderate respiratory conditions, allowing for adequate oxygenation without overly invasive measures.

Using flow rates outside of this range may lead to insufficient oxygen delivery or discomfort for the patient. For instance, flow rates lower than 1 liter per minute may not provide adequate oxygenation, while rates above 6 liters could result in a drying effect on the nasal passages and may not be tolerated well. Understanding these specifics helps healthcare providers deliver safe and effective care to patients who need respiratory support.