A patient is receiving supplemental oxygen via a 30% air-entrainment mask set at 8 L/min. The respiratory therapist must increase the supplemental oxygen to 40%. To maintain the same total output, the flow rate must be increased to _____ L/min
a. 10 c. 16
b. 14 d. 18
ANS: D
The output for the 30% air-entrainment mask set at 8 L/min is 72 L/min, because 30% has nine total parts multiplied by 8 L/min, which equals 72 L/min. The total output for 40% should, therefore, be 72 L/min. There are four total parts in 40% multiplied by an unknown flow that equals 72 L/min. 4X = 72. X is equal to 18 L/min.
You might also like to view...
A nurse detects bilateral crackles when auscultating a client's lungs. Which statement about crackles is true?
a) They're usually heard on expiration and may clear with a cough. b) They're usually heard on inspiration and sometimes clear with a cough. c) They're hissing or musical and are usually heard on inspiration and expiration; if severe, they may be heard without a stethoscope. d) They're creaking and grating and are usually heard over the problem area on both inspiration and expiration.
Which term best defines Specific Rates used in statistics?
A) Rate includes the entire or larger population B) Rate includes a specific factor of the group C) Rate is used for comparison purposes D) All of the above