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Showing posts with label Nasal Cannula. Show all posts
Showing posts with label Nasal Cannula. Show all posts

Nasal Cannula

Nasal Cannula 

          It is simple comfortable device with two cannula about  1.5 cm long protrude the centre of a disposable tube and are inserted into the nose and oxygen is delivered via the cannula with the flow rate of upto 6L/min. Higher flow rates dry air mucosa and to mark further increases inspired oxygen ( O2 ).

Liter Flow : 1-6 liters.


O2 Concentration ( Fio2 ) : 21% - 45%

          The Atomspheric air contain 21% oxygen. Through oxygen flowmeter we can deliver the 4% of oxygen for each 1 liter.
(Ex : Atomspheric air + liters O2 )
         21% + 4%(1liter of O2) = 25%
1=25%, 2=29%, 3=33%, 4=37%, 5=41%, 6=45%)

Administration Guidelines :

  • Maximum flow is 5-6 LPM. Changes to another O2 device if patinet requires >5 LPM.
  • Humidify for liter flows >4 LPM.
  • Use on patient's with adequate tidal volume and normal vital signs.

Advantages :

  • Effective for low oxygen concentrations.

Disadvantages :

  • Will not deliver oxygen concentrations higher than 40%.
  • Dry mucous membranes.

Nasal Cannula Images :




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