Flashcards in Small Group 1 Patterns of Respiratory Dysfunction Deck (25):
Peak expiatory flow rate
forced vital capacity
forced expiratory volume in 1 sec
It represents the proportion of a person's vital capacity that they are able to expire in the first second of expiration
total lung capacity (L)
VC includes which volumes?
expiratory reserve volume
inspiratory reserve volume
ERV+ IRV+ TV
Inspiratory capacity includes which volumes?
What volumes are included in functional reserve capacity (FRC)?
FRC= ERV + RV
Functional reserve capacity is end respiratory volume and the residual volume
minute voluntary ventilation
Pulmonary fibrosis causes ____ reduction in volume.
Plethsmography measures ___________ and then ERV can be subtracted to find RV.
plethysmography measures FRC
What clinical sign is used to diagnose restrictive disease?
Reduced FVC occurs in (obstructive, restrictive, both) disease.
Would you expect someone who has obstructive pulmonary disease due to obesity to have a increased, decreased or normal RV?
obesity is likely to have a
When TLC is increased it is usually because ____ is increased.
What is the line that separates intra thoracic and extra thoracic?
What factors effect diffusion?
alveolar surface area
V/Q (flow) distribution
pulmonary capillary volume
Would the following conditions show low DLco?
dyspnea (obesity and anemia)
emphysema: decreased diffusion
asthma: normal or slightly increased due to labored breathing
lung fibrosis: decreased
dyspnea: obesity decrease (decrease cap.filling)
dyspnea: anemia decrease
mild CHF: increased (due to increased pulmonary cap filling pressure)
Asthma is what type of disorder?
obstructive, note hypersensitivity pneumonitis is not an obstructive process
Air trapping has what effect on FVC?
decreases it, air trapping will cause RV to increase
What are the sounds produced when mucus is found in the med-small airways v. the trachea?
med-small airways- wheezing
Give the rule of thumb to estimate the predicted MVV.
expected value should be 30x the FEV1, remember the maneuver is effort dependent and is a nonspecific method of screening for many obstructions/condiitons
Pressure gradient between airway and ATM pressure causes what type of variable obstruction? How about gradient between lung parenchyma and airway?
extrathoracic (atmospheric pressure exceeds airway pressure)
intrathoracic (pleural pressure exceeds airway pressure)