In type -II respiratory failure, there is: (A) Low p02 and low pCO2, (B) Low p02 and high pCO2, (C) Normal p02 and high pCO2, (D) Low p02 and normal pCO2
Answer is B. Type ll respiratory failure occurs as a result of alveolar hypoventilation and results in the inability to eliminate carbon dioxide effectively.It can be caused by drug overdose,brainstem injury,hypothyroidism,myasthenia gravis,Guillain -Barre syndrome,electrolyte derangements,myopathy,etc.So there will be hypoxia and hypercapnia. Ref:Harrison's medicine-18th edition,page no:2200.