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Medicine

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Respiratory

Question
11 out of 11
 

True about primary pulmonary hypoventilation is: (AIIMS May 2009)



A Does not respond to chemical stimuli

B Hypocapnia and normal PaO2

C Common in children

D Respiratory alkalosis is diagnostic

Ans. A

Does not respond to chemical stimuli

Primary pulmonary hypoventilation

Characterized by:

1). Impaired chemoreception resulting in decreased ventilatory drive.

2). Chronic hypercapnia and hypoxemia in the absence of identifiable neuromuscular disease or mechanical ventilatory impairment.

Presentation:

1). Mostly in males aged 20-50 years.

2). Early: lethargy, fatigue, daytime somnolence, disturbed sleep and morning headache.

3). Late: Cyanosis polycythemia, pulmonary hypertension, congestive heart failure.

Extra Edge: Dyspnea is uncommon despite severe arterial blood gas derangements

Diagnosis:

The key diagnostic feature is respiratory acidosis in the absence of respiratory muscle weaknesses or impaired ventilatory mechanics.

Treatment:

1). Bronchodilators such as beta-agonists, anticholinergic agents, and methylxanthines are helpful in treating patients with obstructive lung disease and severe bronchospasm.

2). Treatment also is aimed at assisting ventilation

Respiratory Flashcard List

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