Assuming a respiratory rate of 12 breaths/min, calculate the minute ventilation.: (A) 1 L/min, (B) 2 L/min, (C) 4 L/min, (D) 6 L/min
Answer is D. Minute ventilation is VT x respiratory rate. VT from the graph is 500 milliliters. Therefore, minute ventilation = 500 x 12 = 6 L/min