RESTRICTIVE LUNG DISEASE

RESTRICTIVE LUNG DISEASE


What are intrinsic causes of restrictive lung disease? - ANS --fibrotic
lung diseases


What are extrinsic causes of restrictive lung disease - ANS -
neuromusular disorders
chest wall deformities
obesity


What are common abnormal breath sounds of restrictive lung disease
and what are characteristics? - ANS -atelectasis - absence of breath
sounds, obstructed airways, pleural effusion, pneumonia, surfactant
deficiency


crackles - discontinuous explosive popping sounds, fine crackles(high
pitch), ,coarse crackles(low pitch), fluid in airways, pulmonary edema


What is the flow/volume loop like in restrictive lung diseases? - ANS -
smaller and more peaked reflecting reduced lung volumes and rapid
emptying

, What is the diagnosis criteria for restrictive lung disease - ANS -
FEV1/FVC >= .70 suggests restrictive pattern or normal lung function


TLC < 80% confirms restrictive pathology


What are the 3 stages of restrictive disease diagnosis? - ANS -Mild - 70-
79% TLC
Moderate - 50-69% TLC
Severe - <50% TLC


What do you look at for PFT interpretation? - ANS -Assess FEV1/FVC - <
or > .70


Assess % predicted TLC - <80% confirms restrictice pathology


Evaluate DLCO - may be reduced in interstial lung disease or pulmonary
vacsular involvement


If TLC was less than 80% but DLCO was normal what would that
indicate? - ANS -chest wall impairment


What do extrinsic etiologies affect? - ANS -Mechanics of breathing
rather than the lung tissue itself