Airway Obstruction Flashcards Preview

Jason's Respiratory Block > Airway Obstruction > Flashcards

Flashcards in Airway Obstruction Deck (31):
1

Is COPD on the rise? or decline?

ON THE RISE! 4th leading cause of bad stuff in adults

2

What percentage of Australian children are affected by asthma?

12-15%

3

What's the most common cause of death from cancer?

Lung cancer.

4

If breathlessness seems appropriate is excepted as what?

sensation

5

If breathlessness appears inappropriate what is it perceived as?

Symptom

6

What increases the longitudinal and lateral dimensions of the thorax?

Contraction of the diaphragm

7

How much oxygen usage does the normal work of breathing use at rest?

3%

8

If you have severe airway obstruction how much oxygen usage can the work of breathing use?

up to 40%

9

What happens to expiration in airway obstruction?

becomes active rather than passive

10

name three important consequences to airway obstruction

1. recruitment of accessory muscles
2. increased O2 consumption
3. respiratory muscle fatigue

11

When are you considered to be in ventilatory failure? PaO2 is? PaCO2 is?

Pa02 < 60mmHg
PaCO2 >50 mmHg

12

What do you do when someone is in respiratory failure?

Mechanical ventilation

13

What is pulses paradoxus?

a fall of systolic blood pressure of more than 10 mg of mercury

14

T/F intra-alveolar pressure is less than pressure Patm during inspiration?

True

15

T/F? P ATM during expiration is greater than intra-alveolar pressure

False

16

What is Patm at the end of inspiration and expiration

Patm = IA pressure

17

Why is intra pleural pressure always < intraalveolar pressure?

Cause of elastic recoil of lungs and chest wall.

18

What's a normal FEV1?

80% of your Functional Vital Capacity

19

What value is FEV1 considered pathological?

<70% of FVC

20

Exercise is limited by heart rate or ventilatory capacity?

Heart rate

21

How much ventilatory capacity left over even at maximum exercise in normals?

30%

22

Does gas trapping do to TLC, RV?

elevates both

23

T/F? gas trapped air can be exhaled but not inhaled?

False. can be inspired but not exhaled

24

What are some diseases that cause nonuniform airflow instruction?

Asthma bronchiolitis and COPD

25

what's The compensatory mechanism of the lung when there are under ventilated areas?

vaso constricts to cut losses and try to match perfusion and ventilation

26

will a Shunt respond to supplemental oxygen?

Nope!

27

Will decrease PaO2 due to low V/Q respond to supplemental oxygen?

yes

28

High V/Q is wasted what?

ventilation

29

Low V/Q is?

wasted perfusion

30

A-a gradient measures what?

efficiency of gas exchange

31

What's a normal A-a gradient value?

5-10 mmHg