Week 3 Airflow limitation COPD (Full on Quizzlet)

Question 1

Signs and symptoms of COPD

Answer 1

Cough + sputum
Dyspnoea
Decreased excercise tolerance
Chest tightness/wheeze

Has extrapulmonary features:

Question 2

Respiratory pathophysiology of COPD

** edit with this weeks slides and week 1 slides

Answer 2

Limitation to airflow >Air trapping >Hyperinflation

Limitation to expiratory flow has 2 components
REVERSIBLE:
Mucus
Bronchospasm 
Inflammation

IRREVERSIBLE:
Floppy airways due to loss of elastic recoil
Fibrosis
Loss of elastic recoil & breakdown of alveolar walls

AIR TRAPPING
Airways close down on expiration. RV increases.

LUNG HYPERINFLATION
*****

Question 3

Effects of lung hyperinflation on the diaphragm

& work of breathing

Answer 3

• Decreased curvature of the diaphragm
• Medial orientation of the Diphragmatic fibres
• Horozontal ribs
• Thoracic cage ER directed inwards

Inspiritory mms need to generate Ppl in excess of intrinsic PEEP
t/f indrawing of supraclavicular fossae
Intercostal recession

Expiratory mucles have increased work

Increased WOB > Dyspnoea