Easily remember Lights criteria with this simple mnemonic

Published: 27 May 2024
on channel: Dr Matt Barrett
1,967
50

Easily remember the three “Lights criteria” for pleural aspiration with this simple menmonic!

⚠️ Spoiler alert: Transudate causes

I asked you to name THREE causes!

Transudates DO NOT (typically) fulfill lights criteria. Examples are similar to the three major causes of peripheral oedema:
☑️ congestive cardiac failure
☑️ cirrhosis
☑️ nephrotic syndrome

Also…
☑️ protein losing enteropathy
☑️ Meigs syndrome

Think of exudates as ‘thick’ fluids (infections/cancers) and transudates as ‘thin’ fluids

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