ATS Pulmonary Function Laboratory Manual

chapter  1

pleth

plethysmographic

P(a–a)O 2

alveolar-arterial oxygen pressure difference

pulm pulmonary Q Q

blood volume

R R

flow resistance, respiratory

R, RQ respiratory quotient Raw airway resistance Rrs,int

resistance of respiratory system to gas flow assessed with interruptor technique resistance of the airways on the alveolar (upstream) side of the equal pressure point

Rus

rb

rebreathing

RHE

respiratory heat exchange

rs

respiratory system respiratory rate residual volume

RR RV

S S

saturation

SRaw

specific airway resistance expressed per liter of lung volume at which Raw is measured

Sp O 2

oxygen saturation measured by pulse oximetry

s

second

sb sp

single breath spirometric steady state

ss st

static STPD standard temperature and pressure, dry

T T

tidal

t t

temperature

time

T L

gas transfer factor for the lung

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