If the inspiratory flow rate of the patient is greater than what is being provided by the cannula the patient will entrain room air into the lungs. The earliest and most widely used form of adult nasal cannula carries 1 3 litres of oxygen per minute.
Pilot study journal of paediatrics.
Nasal cannula flow rate. Nasal prong flow rates of greater than 1 lpm in neonates. Cannulae with smaller prongs intended for infant or neonatal use can carry less than one litre per minute. A simple face mask can get you flows between 6 10l min.
Nasal prongs should not completely occupy the nares. It actually takes gas and can heat it to 37 o c with a 100 relative humidity and can deliver 0 21 1 00 fi02 at flow rates of up to 60 liters min. Heat and humidified high flow nasal cannula or as most call it hi flow nasal cannula hfnc isn t just a standard nasal cannula cranked up to very high flow rates.
Venti masks aka venturi masks can get you flow rates between 4 8l min. The best you can potentially do with a non high flow device is the non rebreather which can generate a flow rate of 10 15l min. Regular nasal cannula provides between 1 6 liters of flow.
Flow rates of up to 60 litres of air oxygen per minute can be delivered through wider bore humidified nasal cannula. 2010 high flow nasal cannulae therapy in infants with bronchiolitis. But patients with respiratory distress can have much higher peak inspiratory flow rates.
Journal of pediatrics 156. Even during quiet breathing inspiratory flow rates are approximately 30 liters per minute which exceeds supplemental oxygen flow 3. Secure nasal cannula on patients using supplied wiggle pads ensuring the prongs sit well into the nares.
Oxygen delivery devices and flow rates chart given below is the respiration management table which shows the oxygen percentage exhaled measured against a number of respiratory measurement tools such as nasal cannula simple mask venturi mask partial re breathing mask non rebreathing mask. Table 2 nasal cannula flow rate recommendations. High flow nasal cannula oxygen therapy for infants with bronchiolitis.
Start the high flow nasal cannula system in room air ie. Conventional low flow devices e g nasal cannula or simple face mask provide 100 f io2 at a maximum of 15 liters per minute. The flow rate and fi02 can be independently titrated based on your patient s flow and fi02 requirements.
Nasal cannula oxygen percentage chart above shows the oxygen flow rate from 1 to 6 where 1 l min delivers fio2 as 28 and 6 l min delivers an oxygen concentration of 44. Traditional nasal cannula delivers flow rates of 2 6 l min. 21 oxygen once prescribed flow rate is reached assess requirement for supplemental oxygen.
Oxygen flow rate and fio2 table. May vol 50 5 pp373 378 mckieman c chua l c visintainer p. Size flow rate all premature cannulas 3 lpm all neonatal cannulas 3 lpm all infant cannulas 3 lpm all intermediate infant toddler cannulas 3 lpm pediatric cannulas 6 lpm pediatric high flow cannulas 15 lpm adult conventional cannulas 6 years adult micro cannulas 3 lpm adult quit cannulas 8 lpm adult high flow cannulas 15 lpm.