use delta delta gap to calculate third acid base disorder

• related: Nephrology
• tags: #permanent

2 ways to calculate delta delta. You can use delta gap or delta ratio. Delta ratio is easier:

$\Delta\Delta\space ratio = \frac{AG-12}{24-\space bicarb}$

• <0.4: NAGMA. Top number is very small.
• 0.4-0.8: AGMA with NAGMA. Top number slightly higher. Maybe some underlying AGMA.
• 1-2: AGMA

• 2: AGMA with preexisting elevated bicarb. Bottom number very small, meaning chronic elevated bicarb either from chronic hypercapnia with metabolic compensation or chronic metabolic alkalosis (e.g. diuresis)

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• Nephrology
  • use delta delta gap to calculate third acid base disorder