The following measurements were made on a normal subject Whi

The following measurements were made on a normal subject: Which of the breathing patterns below would not change the subject\'s P_aO_2. Explain your answer, show calculations.

Solution

VE = VT X f

VA= VTxf - VDxf

Pattern	VT (mL)	f (per min)	VE (mL/min)	VT-VD	VA (mL/min)	Pa O2
a	400	30	12000	11,606	5,991	760x 20.93/100
b	500	30	15000	14,506	14,991	760x20.93/100
c	800	7.5	6000	5,206	6009	760x20.93/100
d	800	10	8000	7,206	4009	760x20.93/100
e	900	10	9000	8,106	5409	760x20.93/100