Spirometry Testing A Flashcards
What is the definition of a slow vital capacity?
Maximum inspiration, then a maximum exhalation.
SVC is useful when ___ is reduced and ___ is present.
FVC is reduced
Airway obstruction is present
Slow exhalation results in a lesser degree of airway ___, and the patient may produce a larger ____.
narrowing
vital capacity
If the SVC is within normal range, it is unnecessary to measure ___.
Static lung volumes.
If FVC is normal, it’s also unnecessary to measure static lung volumes.
What does ATPS stand for?
What does BTPS stand for?
Ambient Temperature and Pressure Saturated
Body Temperature and Pressure Saturated
BTPS is based on three things:
___ pressure,
___ pressure, and
___ level.
Ambient pressure
Barometric pressure
Humidity level
How do you do a Vital Capacity?
Maximum inspiration, then maximum expiration
What is a typical value of a vital capacity?
4800 ml
What is the best value to diagnose a restrictive disease?
Vital Capacity. (If vital capacity is decreased, suspect restrictive disease.)
What is the definition of IRV?
An inspiratory reserve volume is the largest volume of gas that can be inspired above normal tidal volume. (Doesn’t include tidal volume.)
What is a typical IRV value?
3100 ml
What is a typical ERV value?
1200 ml
What is the definition of inspiratory capacity?
The largest volume that can be inspired from resting end-expiration
What is a typical inspiratory capacity?
3600 ml
How do you do a forced vital capacity?
Maximum inspiration followed by a forced and rapid maximum expiration
The FVC may be substituted for the ___ to identify (obstructive / restrictive) lung disease.
SVC
Restrictive
If FVC and SVC are given, you should compare them. If they’re the same, that means you should suspect ___.
If SVC is greater, then that means you should suspect ___.
If FVC is greater, then that means that you should suspect ___.
That the lungs are normal.
If SVC is greater, suspect obstructive lung disease. (Patients with obstructive lung disease can exhale more air slowly than rapidly.)
If FVC is greater, suspect that patient effort during the SVC was poor.
How do you do an FVC?
- Inspire as deeply as possible
- Do a ___.
- Exhale as forcefully as possible
- Continue exhaling as hard as possible until ___ is achieved or ___ seconds has elapsed.
- Inspire as deeply as possible.
- Inspiratory plateau (breath hold)
- Exhale as forcefully as possible
- Continue exhaling as hard as possible until expiratory plateau is achieved or 15 sec has elapsed.
If the patient passes out during the FVC Maneuver, this may indicate ___.
Decreased venous return (vaso-vagal response)
Increase in FVC of >10% after bronchodilator can be suggestive of a positive post-bronchodilator response or ___.
Peripheral air trapping or a positive post-bronchodilator response.
How do you calculate FVC from a graph?
Maximum expiration minus maximum inspiration
On an FVC, before exhalation starts, you should record ___ to ___ seconds.
0.25-1 sec
The FEV1 reflects the first second of a forced exhalation that follows a full inspiration, expressed in (liters or milliliters?).
Expressed in liters
What is the value of a typical total lung capacity?
6000 ml
What is a typical (RV/TLC)x100?
20%
When describing lung volumes, do we use ATPS or BTPS?
BTPS
