Low Flow Oxygen

1. See Also
   1. Oxygen Delivery
2. Nasal cannula
   1. Two short plastic nasal prongs
   2. Delivers 25-45% FIO2 at 1-6 L/min flow
   3. Delivers 4% Oxygen per liter flow
      1. Flow 0 liters per minute: 21% (Room Air)
      2. Flow 1 liters per minute: 25%
      3. Flow 2 liters per minute: 29%
      4. Flow 3 liters per minute: 33%
      5. Flow 4 liters per minute: 37%
      6. Flow 5 liters per minute: 41%
      7. Flow 6 liters per minute: 45%
   4. Flow rates >4 liters per minute irritates nasopharynx
   5. Does not provide humidified oxygen
3. Face Tent/Shield
   1. High-flow, soft plastic "bucket" over nose and mouth
   2. Better tolerated than face mask
   3. Delivers only 40% Oxygen at 10-15 liters per minute
4. Simple Oxygen Mask
   1. In children use the Soft Vinyl Pediatric Mask
   2. Poorly tolerated by infants and toddlers
   3. Delivers 35-60% Oxygen at 6-10 L/min flow rates
      1. Room air entrained during inspiration
      2. Reduced Oxygen Concentration if:
         1. High spontaneous inspiratory flow
         2. Mask is loose
         3. Oxygen flow into the mask is low