lung volumes Flashcards
how can total lung capacity be calculated
vital capacity+residual volume
what does an obstructive lung condition mean
air struggles to get out
what does a restrictive lung condition mean
air struggles to get in
what is forced expiratory volume per second
the volume of air you can forcefully breathe out in 1 second
what are the forced vital capacity
maximum of air you can forcefully breathe out
what happens to the fev1/fvc ratio in obstructive lung conditions
the fev1/fvc ratio reduces
what happens to the fev1/fvc ratio in restrictive lung conditions
the fev1/fvc ratio increases or stays normal
what are examples of obstructive lung conditions
asthma, emphysema, copd, chronic bronchitis
what are examples of restrictive lung conditions
lung fibrosis/ pulmonary fibrosis
what happens to fev1 forced expiratory volume per second (the volume of air forcefully expired in the first second of the forced breath)
reduced slightly because person cannot expel air quickly
what happens to the fvc in obstructive lung conditions
reduced to a lesser extent than fev1 is reduced.
what is the normal fev1/fvc ratio
75-80
what is the fev1/fvc ratio in obstructive lung conditions
below 70%
why does the fev1/fvc ratio in restrictive conditions increased or stay normal
because fev1 and fvc are reduced equally
reduced proportionally
definition of asthma
chronic inflammatory disorder secondary to type 1 hypersensitivity resulting in reversible bronchoconstriction
