Type of pattern Number (% of total)
Pattern 1 3 (10.7)
Pattern 2 3 (10.7)
Pattern 3 13 (46.4)
Pattern 4 8 (28.6)
Pattern 5 1 (3.6)
Pattern1- Normal TBFVL graphic curve; Pattern 2- Normal inspiratory limb and FLATTENED expiratory limb of TBFVL curve; Pattern 3- Normal expiratory limb and FLUTTERED inspiratory limb of TBFVL curve; Pattern 4- Inspiratory limb FLUTTERED and expiratory limb FLATTENED; Pattern 5- Early expiratory peak with the concave expiratory limb Pattern1- Normal TBFVL graphic curve; Pattern 2- Normal inspiratory limb and FLATTENED expiratory limb of TBFVL curve; Pattern 3- Normal expiratory limb and FLUTTERED inspiratory limb of TBFVL curve; Pattern 4- Inspiratory limb FLUTTERED and expiratory limb FLATTENED; Pattern 5- Early expiratory peak with the concave expiratory limb