08.19 - PFTs (Freire) - Questions

Question 1

Post-bronchodilator response is positive if

Answer 1

Incr in FEV1 of 200 cc (and 12%), or 15% from basal FEV1

Question 2

The MVV Maneuver tests

Answer 2

Max respiration in L/min

Question 3

How to perform MVV Maneuver

Answer 3

Deep breaths as hard and fast as possible for 12 seconds

Question 4

Internal consistency check for MVV Maneuver

Answer 4

40 times FEV1

Question 5

If both obstructive and restrictive have decr VC, how differentiate?

Answer 5

Obstructive defined by FEV1/FVC <70%

Question 6

VC is reduced in (3)

Answer 6

Chest Pain; Fatigue; Poor Effort

Question 7

TLC is reduced in (4)

Answer 7

Diseases of Thorax; Inspiratory Muscles; Pleural Dz; Loss of functioning alveoli

Question 8

Hyperinflation and air trapping increases __ volume

Answer 8

Residual Volume

Question 9

Dynamic Hyperinflation

Answer 9

Air Trapping and Hyperinflation become more profound as RR increases with exercise

Question 10

__ corresponds more strongly to dyspnea than FEV1

Answer 10

IC

Question 11

Real way that medication helps patients with COPD and Hyperinflation

Answer 11

Limits dynamic hyperinflation and air stacking.

Question 12

Compliance in Asthma

Answer 12

Same as normal

Question 13

Compliance in Emphysema

Answer 13

Increased

Question 14

Compliance in Fibrosis

Answer 14

Decreased

Question 15

What differentiates asthmatics form COPD in PFTs

Answer 15

Increased compliance in COPD

Question 16

FEV1/FVC in Fibrosis

Answer 16

Very high –> Hyperflows

Question 17

A normal SVC excludes

Answer 17

a significant restrictive disorder

Question 18

Flow velocities are __ for each given instanteous volume in Restrictive

Answer 18

higher (>elastic recoil)

Question 19

Which component of Expiration on Flow-Volume loop is effort-independent

Answer 19

Terminal portion –> Driven only by elastic recoil

Question 20

Can dx central airway disorders by

Answer 20

Flow-Volume Loop

Question 21

Inspiratory phase of flow-volume loops give the ___ component of central airways

Answer 21

Extra-Thoracic

Question 22

If fixed obstruction is present, it will show on ___ and ____

Answer 22

inspiratory and expiratory portion of FV Loop

Question 23

Co is used to measure DL b/c

Answer 23

it has high affinity for Hb; Found in low concentration in blood

Question 24

Which method of DLCO is simple and standardized

Answer 24

Single Breath

Question 25

DLCO with blood in lung

Answer 25

Higher than actual

Question 26

DLCO in Pulmonary HTN

Answer 26

Higher than actual

Question 27

Bronchoprovocation with Methacholine is considered positive if

Answer 27

FEV1 decrease of 20%