PFT 1

Question 1

What are obstructive pattern D/O?

Answer 1

COPD(chronic bronchitis or emphysema)
Asthma
Cystic Fibrosis
Bronchiectasis

Question 2

Obstructive patterns are inspiratory or expiratory and have what effect on lung volumes

Answer 2

Expiratory

Lung Vol. Increase or remain normal

Question 3

Restrictive patterns are inspiratory or expiratory, and what happens to lung volumes?

Answer 3

Inspiratory

Lung volumes decrease

Question 4

Hows does compliance differ in restrictive vs obstructive?

Answer 4

Compliance is high in obstructive and low in restrictive

Question 5

What are Restrictive pattern D/O?

Answer 5

•Diseases that limit lung expansion by decreasing lung compliance:
sarcoidosis, pneumoconiosis, idiopathic/interstitial pulmonary fibrosis
•Loss of Lung Volume:
lung resection, pneumothorax, pleural effusion
•Chest Wall Deformity/Disease:
pectus excavatum, kyphosis, scoliosis, straight-back syndrome, neuromuscular disorders
(MD, ALS)
•Extra-thoracic Compression:
obesity, pregnancy, ascites
•Intra-thoracic Compression:
pulmonary tumor

Question 6

What are the relative CI for PFT?

Answer 6

• infectious control
• high myocardial demand
• high sinus or inner ear pressure
• high intraocular pressure
• high intraabdominal pressure

Question 7

What are some other CI for PFT?

Answer 7

• unwilling
• too young <5-6 yo
• ARS
• physically unable

Question 8

What are the 3 main components of PFT?

Answer 8

1. Lung volumes
2. Diffusion capacity
3. Flow rate

Question 9

National Asthma Education Program and American Thoracic Society reccomend spirometry in dx what two conditions respectively?

Answer 9

Asthma

COPD

Question 10

What shoud be generally avoided before PFT?

Answer 10

Smoking or other like it 1hr prior
xs exercise 1hr prior
intoxication 8hr prior

Question 11

What is the predicted value based off of ?

Answer 11

norms based on Ht, gender, and Age

Question 12

What are the American Thorasic Society guidelines for pt pre PFT?

Answer 12

• No smoking within 1 hr of PFT-
• Avoid vigorous exercise within 30 min of testing
• No eating a large meal within 2 hr of testing
• No bronchodilator meds within several hours of the PFT

Question 13

What is considered good pt effort?

Answer 13

quick start
no coughing 1st sec
6 sec blown adults and 3 sec peds

Question 14

How many acceptable trials for PFT are required, and how far apart can they be?

Answer 14

3 trials and 200 ml apart