Calculations

Question 1

Time constants

Answer 1

(Circuit size X O2 flow rate) X 5 time constants

Question 2

How long will it take to change a circuit percentage from 2% to 5%
4 L circuit, 2L/min

Answer 2

(4L X 1 min/ 2L) X 5

Question 3

Blood loss during sx

Answer 3

(Volume in canister X canister PCV) / patient original PCV

Question 4

Find MAP

Answer 4

[(2 X diastolic) + systolic] / 3

Question 5

7.5 hypertonic solution in 100mL

Answer 5

7.5 grams of NaCl