Pulmonary Function Testing Ch.4

Question 1

The volume of gas that normally moves into and out of the lungs in one quiet breath

Answer 1

Tidal volume

Question 2

The volume of air that can be forcefully INSPIRED after a normal tidal volume

Answer 2

Inspiratory reserve volume (IRV)

Question 3

The volume of air that can be forcefully EXHALED after normal tidal volume exhalation

Answer 3

Expiratory reserve volume (ERV)

Question 4

The amount of air remaining in the lungs after a forced exhalation

Answer 4

Residual volume (RV)

Question 5

The volume of air that can be exhaled after a maximal inspiration

Answer 5

Vital capacity

Question 6

VC equation (3 parts)

Answer 6

VC= IRV +VT+ ERV

Question 7

The volume of air that can be INHALED after a normal EXHALATION

Answer 7

Inspiratory capacity (IC)

Question 8

IC equation (2 parts)

Answer 8

IC=VT+IRV

Question 9

The lung volume at rest after a normal tidal volume exhalation

Answer 9

Functional residual capacity (FRC)

Question 10

FRC equation (2 parts)

Answer 10

FRC= ERV+RV

Question 11

The maximal amount of air in the lungs can accommodate

Answer 11

Total lung capacity (TLC)

Question 12

TLC equation

Answer 12

TLC=VT+IRV+ERV+RV

Question 13

Restrictive lung disorders examples

Answer 13

-Atelectasis- pneumothorax
-Consolidation- PNA
- Increased alveolar capillary membrane thickness- Pulmonary edema

Question 14

Obstructive lung disorders examples

Answer 14

Cystic fibrosis
Bronchitis
Asthma
Bronchiatasis
Emphysema

Question 15

FRC and TLC can be measured by one of the following

Answer 15

-Close-circuit helium dilution
-open circuit nitrogen washout test
- body plethysmography

Question 16

Measures the amount of carbon monoxide (CO) that moves across the alveolar- capillary membrane

Answer 16

Pulmonary diffusion of carbon monoxide (DLCO)

Question 17

The result of the pulmonary function studies are used to

Answer 17

1. evaluate pulmonary causes of dyspnea
2. differentiate between obstructive and restrictive pulmonary disorders
3. assess severity of the pathophysiologic impairment
4. follow the course of the disease
5. evaluate the effectiveness of therapy
6. assess the pt’s pre-operative status

Question 18

Pulmonary function studies are commonly subdivided into the follow cate

Question 19

increased lung rigidity, which in turn decreases lung compliance in ____________ ______ ___________

Answer 19

Restrictive lung disorders

Question 20

Associated with pathologic conditions that alter the anatomic structures of the lung distal to the terminal bronchioles ______________ ______ volumes and capacities

Answer 20

Restrictive lung volumes and capacities

Question 21

The percentage of TLC occupied by the RV

Answer 21

RV/TLC ratio x100