🔢 The 2-4-20 Rule

Memorize these 3 numbers for lactate monitoring:

1️⃣ 2 mmol/L = Red flag threshold
2️⃣ 4 hours max between repeat lactates
3️⃣ 20% clearance target every 2 hours

If lactate isn't dropping 20% every 2 hrs → reassess resuscitation.

2-4-20. Commit it to memory.