PFTs

Question 1

definition of obstructive

Answer 1

FEV1/FVC <70%

Question 2

restrictive disease

Answer 2

TLC <80% predicted FEV1/FVC elevated

Question 3

sniff test

Answer 3

flouroscopy to asscess diaphragmatic movement

Question 4

FEV1 w/obstuction

Answer 4

>2L mild 1-2L moderate <1L severe

Question 5

obstructive flow loops

Answer 5

concave expiratory pattern w/relatively normal inspiratory curve

Question 6

Dx reversible component

Answer 6

if FEV1 or FVC increased by 12% or more and absolute improvement of 200mL occurs in response to bronchodilation then obstruction has reversible component

Question 7

methacholine challenge

Answer 7

assess airway hypersensitivity up to 50% w/allergic rhinits but not asthma will have a positive methacholine challenge if negative can rule out though

Question 8

spirometry

Answer 8

FVC FEV1 FEV1/FVC VC

Question 9

helium lung volumes

Answer 9

RV ERV IRV TV TLC VC FRC IC

Question 10

TLC and restrictive disease

Answer 10

65-80%mild 50-65%moderate <50%severe

Question 11

common causes of DLCO

Answer 11

interstitial lung disease emphysema

Question 12

other causes of DLCO

Answer 12

CHF -pulmonary edema PHTN PE polycythemia pulmonary hemorrhage L->R cardia shunt

Question 13

Measuring RV

Answer 13

cannot be down w/spirometry FRC-ERV

Question 14

nitrogen washout

Answer 14

poorly ventilated or non-ventilated areas will not be included in FRC w/this technique

Question 15

helium dilution technique

Answer 15

poorly ventilated or non-ventilated areas will not be included as part of FRC

Question 16

body plethymography

Answer 16

non-ventilated regionS are included in FRC

Question 17

Answer 17

Normal

Question 18

Answer 18

normal

Question 19

Answer 19

obstructive

Question 20

Answer 20

obstructive

Question 21

Answer 21

severe obstructive

Question 22

Answer 22

restrictive

Question 23

Answer 23

restrictive