session 7 Flashcards
what pattern does bronchiectasis cause
obstructive lung disease
what is seen in an obstructive defect
FVC normal or decreased, FEV1 decreased a lot and disproportionally, FEV1/FVC reduced.
what is seen in a restrictive defect
TLC reduced, FVC reduced, FEV1 reduced proportionally. FEV1/FVC normal
change of flow volume graph for obstructive flow
there is scalloping of expiratory flow. FEV1 moves to left as severity increases
change of flow volume graph for restrictive disease
wizards hat- same shape just narrower and tall
what is not measured by spirometry
residual volume, functional residual capacity and total lung capacity, dead space
how to measure FRC
helium dilution test
how to measure dead space
nitrogen washout method
contradictions for spirometry
recent eye surgery, thoracic surgery, lung disease, CVD, aneurysms, acute diarrhoea, infection control, confused patients
how to carry out spirometry
patient sat down, nose clip, mouth makes tight seal and patient exhale and inhale quietly. forced vital capacity peformed- maximal inspiration followed by breathing out as hard and fast as possible
example obstructive lung disease
asthma/COPD
example restrictive lung disease
interstitial lung disease
