Week 2

Question 1

What 3 things influence ventilation?

Answer 1

1. Respiratory muscle action
2. Gravity
3. Intrapleural & alveolar pressure

Question 2

Optimal ventilation occurs just above the basal region due to what 3 factors:

Answer 2

1. Lung weight (relates to IP pressure)
2. Partially open airways
3. Tidal volume

Question 3

What three factors influence Perfusion?

Answer 3

1. Gravity
2. Body position
3. Arterial pressure relative to alveolar pressure

Question 4

Define Shunt

Answer 4

• blood reaching arterial system without reaching ventilated regions of the lungs

Question 5

What is Alveolar Dead space?

Answer 5

Regions of ventilated alveolar that are poorly perfused

Question 6

What two elements comprise Physiological dead space ?

Answer 6

Alveolar + Anatomical dead space

Question 7

List some Clinical evidence for airflow limitation: (4)

Answer 7

1. Exploratory wheeze
2. Added auscultation sounds
3. Productive cough
4. Thick coloured sputum

Question 8

Restrictive lung disease is defined by….?

Answer 8

• reduced total lung compliance

Question 9

Restrictive Respiratory disease have difficulty doing what?

Answer 9

• getting air in

Question 10

Restrictive lung disease will present with a decreased ______ on spirometry

Answer 10

Total Lung Capacity (overall reduction)

Question 11

Give Clinical evidence of reduced lung volume: (4)

Answer 11

• decreases basal sounds on auscultation
• CXR findings
• SPO2 levels
• pain on inspiration

Question 12

What 3 factors determine WOB

Answer 12

1. Capacity
2. Load
3. Drive

Question 13

List 3 examples of causes that would increase load in WOB

Answer 13

1. Airways obstruction
2. Fibrosis of lung tissue
3. Chest wall trauma or structure

Question 14

List S&S’s of increased WOB (4)

Answer 14

1. reported Dyspnea
2. Accessory muscle use
3. Increased respiratory rate
4. ABG or SPO2 alteration