Final Exam Flashcards
(84 cards)
in the context of pulmonary function testing, what does a high RV/TLC ratio indicate?
air trapping
during a PFT, what is the term for the amount of air you can inhale after a normal inspiration?
IRV-inspiratory reserve volume
during a PFT, what is the term for the amount of air you can forcefully exhale after a maximum inspiration?
FVC-forced vital capacity
during a PFT, what is the term for
air left in the lungs after a maximum exhalation?
RV-residual volume
during a PFT, what is the term for the ratio of volume exhaled in 1 second to total volume exhaled?
FEV1/FVC
during a PFT, what is the term for the amount of air you can exhale after a maximum inspiration?
VC- vital capacity
during a PFT, what is the term for the milliliters of gas the lung can transfer to the blood?
DLCO- diffusion capacity
during a PFT, what is the term for the volume of air you can forcefully exhale in 1 second?
FEV1-forced expiratory volume at 1 sec
during a PFT, what is the term for the largest amount of air the lungs can hold?
TLC- total lung capacity
during a PFT, what is the term for the amount of air you can exhale after a normal exhalation?
ERV- expiratory reserve volume
during a PFT, what is the term for
greatest amount of air you can breathe in 12-15 seconds?
MVV-maximum voluntary ventilation
during a PFT, what is the term for the amount of air you can inhale after a normal exhalation?
IC- inspiratory capacity
during a Nitrogen washout test, what gas does a patient breathe in through the PFT machine?
100% oxygen
what 4 variables are used for calculating normal values for spirometry?
height, age, gender, and ethnicity
during a PFT, what can cause a low TLC?
restrictive disease
what pulmonary function test best measures the total lung capacity including trapped air?
plethysmography (body box)
what gas is usually used to measure the lung’s ability to transfer gas to the blood during a DLCO?
CO-carbon monoxide
What are 2 disease processes that can cause a low DLCO?
emphysema and pulmonary fibrosis
what value can be measured during a spirometry test?
vital capacity (VC)
A patient presenting with signs of leukocytosis with a WBC of 15,000 probably has _________?
a significant infection
to be in control a value must be within how many standard deviations of the average?
2
what is the normal value range for K+ (potassium)?
3.5-5.1
following endotracheal intubation, a colorimetric CO2 sensor is placed in line. the device changes color from purple to yellow. What does this indicate?
there is CO2 present in the exhaled gas
what does capnography measure?
PetCO2