Anion Gap (Low): Difference between revisions
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***Leads to overestimation of plasma Cl conc) | ***Leads to overestimation of plasma Cl conc) | ||
**Bromide intoxication (e.g. for myasthenia gravis and some herbal medications) | **Bromide intoxication (e.g. for myasthenia gravis and some herbal medications) | ||
***Machine mistakenly reads Br as Cl | |||
*AG falls by 2.5 meq/L for every 1 g/dL reduction in albumin concentration | *AG falls by 2.5 meq/L for every 1 g/dL reduction in albumin concentration | ||
Revision as of 00:51, 27 April 2011
Background
- < 7 meq/L
DDX
- Lab error
- Decreased "unmeasured" anions
- hypoalbuminemia
- Increased "unmeasured" cations
- hyperkalemia
- hypercalcemia
- hypermagnesemia
- lithium intoxication
- 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
Source
Kaji Questions