Question

TLC = 4200, VC = 3200, IC = 2000 Calculate the FRC and RV?

VC = 3200, IC = 2200, ERV = 1000, RV = 1000 Calculate the TLC.   ?

TLC = 6500 VC = 5000 Find RV.

TLC = 6500   IC = 3500 Find FRC.

TLC = 6500   RV = 1200 Find VC.

IC = 3500 TV = 600 Find IRV.

FRC = 2300 RV = 1200 Find ERV.

The total volume of air in Jeffrey’s lungs is 5800 mL. If his IC is 3200 and his RV is 1000, calculate his ERV and FRC.

Answer 1

1. The total lung capacity can be denoted by the equation

TLC= VC+ RV

here TLC=4200 ; VC=3200 so the RV=1000 mL

TLC can be calculated as the sum of the FRC and the IC

Then IC= TLC-FRC

=4200-2000 =2200 mL

2.The total lung capacity is the total volume of air inside the lungs after a forced inspiration,

The TLC is sum of vital capacity + the residual volume

so TLC=3200+1000=4200mL

3.From the same equation applied above ,

The RV=TLC-VC=6500-5000=1500 mL

4.The functional residual capacity is the theamount of air in the lung after a normal expiration

FRC=TLC-IC

FRC=6500-3500=3000mL

5. VC+RV=TLC

so TLC = 6500   RV = 1200

VC=6500-1200=5300 mL

6.Inspiratory capacity is the amount of air than can be inspired after a normal expiration

IC=IRV+TV

IC = 3500 TV = 600

so the IRV=3500-600=2900 mL

7.FRC=ERV+RV

so from the equation, ERV=FRC-RV

=2300-1200

=1100 mL

8.The TLC of Jeffery is 5800 mL

His IC=3200

RV=1000

So IC+RV+ERV=TLC

ERV= TLC-(IC+RV)

=5800-4200

=1600 mL

FRC=ERV+RV

=1600+1000

2600 mL