PFTs

Question 1

What is a PFT? What is the purpose?

Answer 1

Pulmonary Function Test

• used to determine function of the lungs
• used to determine RESTRICTIVE vs OBSTRUCTIVE

Question 2

Obstructive Resp Disease

Answer 2

Air can get in to lungs but air can NOT get out

–>Decreased FLOW

Question 3

What is CBABE?

Answer 3

Cystic Fibrosis
Bronchitis
Asthma
Bronchiectasis
Emphysema

Question 4

Restrictive Resp Disease

Answer 4

Air can NOT get IN

Question 5

3 examples of Restrictive Resp Diseases

Answer 5

• Fibrosis
• Scoliosis
• Guillan Barre (neuromuscular disorder)

Question 6

Tidal Volume

Answer 6

Normal, easy breathing

Question 7

Inspiratory Capacity

Answer 7

The greatest volume of air you can inspire

Question 8

Expiratory Reserve Volume

Answer 8

The greatest volume of air you can expire

Question 9

Residual Volume

Answer 9

The amount of air in your lungs that can NEVER be expired.

• Can not be measured but can be calculated
• Any other part of the graph with RV can NOT be measured

Question 10

Total Lung Capacity

Answer 10

TLC = Inspiratory Reserve Volume (IRV) + Tidal Volume (TV) + Functional Residual Capacity (FRC)

Question 11

Vital Capacity

Answer 11

Total max volume of air you can inhale and exhale (IC + ERV)

Question 12

4 Considerations for performing LFT

Answer 12

Height, Age, Gender, Race

Question 13

Predicted Values

Answer 13

Million of lung stats in a database. Used to compare against abnormals.

Question 14

Vital Capacity is used to measure________.

Answer 14

Restrictive Disease

Question 15

Decreased ______ indicates Restrictive Disease.

Answer 15

Vital Capacity (volume)

Question 16

What is the best predictor of Restrictive Lung Disease?

Answer 16

Vital Capacity

Question 17

Forced Vital Capacity is used to measure________.

Answer 17

Obstructive Disease

Question 18

If FVC is smaller than ______, it indicates ______.

Answer 18

SVC

Obstructive

Question 19

If FVC cannot be completed in ___sec, indicates _______.

Answer 19

Obstruction

Question 20

What is FEV? What does it measure?

Answer 20

Forced Expiratory Volume

• measures volume of gas expired over a given time interval
• FEV1 = volume expired over 1 sec

Question 21

______ratio is the BEST indicator of ________disease.

Answer 21

FEV1.0/FVC

Obstructive

Question 22

If FEV1.0/FVC is <____ = ______disease

Answer 22

7.0

obstructive

Question 23

If FEV1.0 is decreased but FEV1.0/FVC is normal than the pt has _______disease only

Answer 23

restrictive

Question 24

What will a flow-volume loop look like with obstructive disease?

Answer 24

LONG downslope on exhalation

Pt is trying to breath out all of their trapped air

Question 25

What will a flow-volume loop look like with restrictive disease?

Answer 25

It will be small and narrow b/c they are taking in less volume.

Question 26

Classification of PFTs

Answer 26

``` 80-100% = normal PFT 60-79% = mild disorder 40-59% = moderate disorder <40% = severe disorder ```