Calculate the minute ventilation from the spirogram assuming the respiratory rate as 12/min: (A) 1 L/min, (B) 2 L/min, (C) 4 L/min, (D) 6 L/min
Answer is D. Ans. (d) 6L/min(Ref: Guyton, 13th ed.P.503)Minute ventilation = tidal volume x respiratory rateHere tidal volume is 500 ml (in the graph, it is seen as 3 L to 3.5 L)So, Minute ventilation =500x12=6L/min