Criteria for restriction:

• TLC less than 80% of predicted
• Dicrease of TLC by 10% of predicted

Our patients TLC is 62% of prdiced, hence has restrictive defect.

Caution: Do not make definitive comment about restriction from Vital capacity. If a patient has marked hyperinflation, Vital capacity can be reduced. If the flow rates are increased along with reduced Vital capacity one can surmise there may be restriction. It is always a good idea not to commit yourself about restriction untill TLC is available.