Hypokalemia: Difference between revisions
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**GI (v/d/fistula) | **GI (v/d/fistula) | ||
**Renal | **Renal | ||
*** | ***Diuretics | ||
*** | ***Hyperaldo | ||
** | **Exercise | ||
***HyperCa | |||
***HypoMg | |||
*Drugs | *Drugs | ||
**PCN | **PCN | ||
Revision as of 03:36, 4 May 2011
Background
Low = <3.5meq/L
Low! = <2.5meq/L
Diagnosis
- CNS
- Weakness
- Cramps
- Hyporeflexia
- GI
- Ileus
- Renal
- Met alkalosis
- CV
- ECG findings:
- ST seg depression
- U wave (V4-V6)
- Also may cause:
- PACs/PVCs
- Bradycardia or atrial/junctional tachycardia
- AV block
- V tach, V fib
- ECG findings:
DDX
- Shift
- Alkalosis (each 0.10 rise in pH causes 0.5 decrease)
- Insulin
- B-agonist
- Decreased intake
- Increased loss
- GI (v/d/fistula)
- Renal
- Diuretics
- Hyperaldo
- Exercise
- HyperCa
- HypoMg
- Drugs
- PCN
- Lithium
- L-dopa
- Theophyline
Treatment
- 20meq/h KCl IV or PO
- every 10meq should inc serum by ~0.1meq/L)
- Treat hypomag if present
Source
Tintinalli