A 75-year-old woman presents with increasing exertional dyspnoea over several weeks. Chest X-ray demonstrates a unilateral pleural effusion and a diagnostic pleural tap is performed.

1. State Light’s criteria which would confirm this effusion to be an exudate. 3 marks

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2. Give six causes of exudative pleural effusion. 3 marks

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3. What are three indications for chest drain insertion? 3 marks

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4. Give three risk factors for re-expansion pulmonary oedema following chest drain insertion. 3 marks

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