Post by Brian G on Sept 29, 2014 23:12:47 GMT
Dr. Ridgeway mentioned today that we need to know the delivery volumes and percent of oxygen (FiO2-fraction inspired oxygen) for the different oxygen delivery devices, i.e. nasal cannula, simple mask, etc..
Looking at table 39-3 in the Taylor book (pg 1377), I noticed that for a nasal cannula, 1 L/min starts at 24%, and then it goes up by 4 for each additional liter. So, 2 L/min is 28% oxygen up to the max for a nasal cannula of 6 L/min for 44%.
Similarly, a nonrebreather mask starts at 6 L/min for 60% and goes up to 100%. I didn't mention the 15 L/min because somewhere else I read that 10 L/min on a nonrebreather gives 100%. Probably not a point to stress over. What probably is important is the nonrebreather can give you the most oxygen.
Another interesting fact, with a simple mask you need a min of 5 L/min so that CO2 is pushed out the mask.
Brian
Looking at table 39-3 in the Taylor book (pg 1377), I noticed that for a nasal cannula, 1 L/min starts at 24%, and then it goes up by 4 for each additional liter. So, 2 L/min is 28% oxygen up to the max for a nasal cannula of 6 L/min for 44%.
Similarly, a nonrebreather mask starts at 6 L/min for 60% and goes up to 100%. I didn't mention the 15 L/min because somewhere else I read that 10 L/min on a nonrebreather gives 100%. Probably not a point to stress over. What probably is important is the nonrebreather can give you the most oxygen.
Another interesting fact, with a simple mask you need a min of 5 L/min so that CO2 is pushed out the mask.
Brian