Small Group 1 Patterns of Respiratory Dysfunction Flashcards Preview

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Flashcards in Small Group 1 Patterns of Respiratory Dysfunction Deck (25):
1

PEFR

Peak expiatory flow rate

2

FVC

forced vital capacity

3

FEV1

forced expiratory volume in 1 sec

4

FEV1/FVC

It represents the proportion of a person's vital capacity that they are able to expire in the first second of expiration

5

RV

reserve volume

6

TLC

total lung capacity (L)

7

VC includes which volumes?

expiratory reserve volume
inspiratory reserve volume
tidal volume
ERV+ IRV+ TV

8

Inspiratory capacity includes which volumes?

IRV +TV

9

What volumes are included in functional reserve capacity (FRC)?

FRC= ERV + RV
Functional reserve capacity is end respiratory volume and the residual volume

10

MVV

minute voluntary ventilation

11

Pulmonary fibrosis causes ____ reduction in volume.

symmetric

12

Plethsmography measures ___________ and then ERV can be subtracted to find RV.

plethysmography measures FRC

13

What clinical sign is used to diagnose restrictive disease?

reduced TLC

14

Reduced FVC occurs in (obstructive, restrictive, both) disease.

both

15

Would you expect someone who has obstructive pulmonary disease due to obesity to have a increased, decreased or normal RV?

obesity is likely to have a

16

When TLC is increased it is usually because ____ is increased.

compliance

17

What is the line that separates intra thoracic and extra thoracic?

sternal notch

18

What factors effect diffusion?

alveolar surface area
membrane thickness
hemoglobin concentration
V/Q (flow) distribution
pulmonary capillary volume
carboxyhemoglobin

19

Would the following conditions show low DLco?
Emphysema
asthma
lung fibrosis
dyspnea (obesity and anemia)
mild CHF

emphysema: decreased diffusion
asthma: normal or slightly increased due to labored breathing
lung fibrosis: decreased
dyspnea: obesity decrease (decrease cap.filling)
dyspnea: anemia decrease
mild CHF: increased (due to increased pulmonary cap filling pressure)

20

Asthma is what type of disorder?

obstructive, note hypersensitivity pneumonitis is not an obstructive process

21

Air trapping has what effect on FVC?

decreases it, air trapping will cause RV to increase

22

What are the sounds produced when mucus is found in the med-small airways v. the trachea?

med-small airways- wheezing
trachea- rhonchi

23

Give the rule of thumb to estimate the predicted MVV.

expected value should be 30x the FEV1, remember the maneuver is effort dependent and is a nonspecific method of screening for many obstructions/condiitons

24

Pressure gradient between airway and ATM pressure causes what type of variable obstruction? How about gradient between lung parenchyma and airway?

extrathoracic (atmospheric pressure exceeds airway pressure)
intrathoracic (pleural pressure exceeds airway pressure)

25

Why do asthma and MILD CHF occur with normal or increased diffusion capacity?

capillaries are intact and increased negative pleural pressures during inspiration (asthma) or elevated left atrial pressure (CHF) can cause increased alveolar capillary blood volume