Administration (continued)

Facemask 

• Adult 
• A flow rate of 6-15 liters/minute provides a rise in inspired oxygen concentration 
• up to 60-70 percent, when the mask is simple 
• or above 80% when face mask is with reservoir and none rebreathing 
• The flow rate shouldn’t be < 6 liters/minute to avoid rebreathing, i.e. breathing of their own exhaled gas which is rich in CO2  
• Children
• Use face mask which requires higher flow rate (> 4 L/min) to