Anion Gap (Low): Difference between revisions
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*Increased "unmeasured" cations | *Increased "unmeasured" cations | ||
**[[Hyperkalemia]] | **[[Hyperkalemia]] | ||
** | **[[Hypercalcemia]] | ||
**hypermagnesemia | **hypermagnesemia | ||
**[[Lithium Toxicity]] | **[[Lithium Toxicity]] | ||
Revision as of 20:48, 15 November 2011
Background
- < 7 meq/L
DDX
- Lab error
- Decreased "unmeasured" anions
- hypoalbuminemia
- Increased "unmeasured" cations
- Hyperkalemia
- Hypercalcemia
- hypermagnesemia
- Lithium Toxicity
- Increased cationic paraprotein
- multiple myeloma
- polyclonal IgG gammopathy
- Pseudo
- Severe Hypernatremia (>170 meq/L)
- True conc of Na is underestimated
- Marked hyperlipidemia
- Leads to overestimation of plasma Cl conc)
- Bromide intoxication (e.g. for myasthenia gravis and some herbal medications)
- Machine mistakenly reads Br as Cl
- Severe Hypernatremia (>170 meq/L)
- AG falls by 2.5 meq/L for every 1 g/dL reduction in albumin concentration
See Also
Source
Kaji Questions