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30 Cards in this Set

  • Front
  • Back
VT is composed of ___ (2).
Vd
Va
Vd is ___.
a typical value is ___ ml.
anatomical dead space
150
Va is ___.
a typical value is ___ ml.
alveolar volume
350
a person normally has ___cc/kg of VT
7
FRC is ___. it comprises ___ and ___. it is measured by ___.
functional residual capacity
ERV
RV
body box plethysmography
IC is ___. it comprises ___ and ___.
inspiratory capacity
VT
IRV
VC is ___. it comprises ___ and ___.
vital capacity
IC
ERV
TLC is ___. it comprises ___ and ___.
total lung capacity
VC
RV
boyle's law for body box
FRC = Patm*(Pbox/Paw)
drawback of body box
overestimation of FRC in obstructive disease
drawback of helium dilution measurement
underestimation of FRC in case of obstructive disease
in healthy people, ___ is almost equal to VC.
FEV1
peak flow is early/late in forced expiration, and comes from ___.
early
large airways
FEV25-75 is from the ___ of FEV1 and comes from ___.
middle .5
small airways
expiratory volume plateaus are reached in ___ conditions, but not in ___
normal
restrictive disease
obstructive disease
___ is most sensitive to small airway disease.
PEF25-75
flow/volume loops are only plotted for ___.
forced expiration
5 PFT findings for obstructive disease
reduced FEV1
reduced FVC
FEV1/FVC < 80%
increased RV
increased TLC
2 uses for FEV1 in asthma
methacholine challenge test
measure response to ventolin
on flow/volume loop, asthma is visible as ___.
left shifted, narrower, smaller amplitude loop
in emphysema, the flow/volume loop is ___
concave up
5 PFT findings in restrictive disease
reduced FEV1
reduced FVC
FEV1/FVC > 80%
reduced RV
reduced TLC
on flow/volume loop, restrictive disease is visible as
right shifted, narrower, decreased amplitude loop
reduced DLCO is primarily associated with ___ (4)
smoking
emphysema
restrictive disease
vascular diseases
DLCO may be decreased by ___ (2).
reduced interface area
increased interface thickness
T/F: increased perfusion of lungs increases CO uptake
false
CO uptake is ___ limited
diffusion
it takes ___ of the RBC traversal time for PaO2 to rise to PAO2
1/3
O2 uptake is ___ limited at rest, ___ limited under exertion
perfusion
diffusion
DLCO is increased in ___ (3)
alveolar bleeding
polycythemia
HF