Lecture 5a

Question 1

How do we differentiate between type 1 and type 2 respiratory failure

Answer 1

Type 1 - diffusion defect

Type 2- failure of ventilation to remove CO2

Question 2

In Hypoxemia caused by a shunt (no ventilation) or dead space (no perfusion) how would the response to increased FiO2 be , good or poor (or none)?

Answer 2

Poor or none because the problem is either not being able to get air into the lungs or difficulty getting air from lungs to tissues

Question 3

Why is pH low in acute hypoventilation and increased in chronic hypoventilation

Answer 3

In chronic hypoventilation the kidneys increase the concentration of bicarbonate ions to buffer the H+ ions and stabilise the pH

Question 4

How would you describe hypoxic pulmonary vasoconstriction

Answer 4

AS DIVERTING OF BLOOD AWAY FROM POORLY VENTILATED ALVEOLI

Question 5

What is Cor pulmonale

Answer 5

(right sided heart failure) an enlargement of the right ventricle due to high blood pressure in the lungs usually caused by chronic lung disease.