What is the minimum oxygen flow rate when using a nasal cannula?

The minimum oxygen flow rate when using a nasal cannula is commonly set at 1 liter per minute. At this flow rate, the device can deliver a low concentration of oxygen to the patient, which is suitable for those who require supplemental oxygen but do not need a high concentration.

Using a nasal cannula at 1 liter per minute can provide approximately 24% oxygen concentration, which may be adequate for patients with mild respiratory distress or those who need a moderate level of supplemental oxygen. As the flow rate increases, the percentage of oxygen delivered also increases, but starting at 1 liter per minute ensures that the patient receives some level of oxygen without overwhelming their respiratory system.

As for the other values, while higher flow rates are often used, they represent a progression above the minimum requirement. For instance, using flow rates of 2, 3, or 4 liters per minute can enhance oxygen delivery but are not considered the minimum necessary for effective use of a nasal cannula.