Hypokalemia: Difference between revisions
No edit summary |
(→Source) |
||
| Line 51: | Line 51: | ||
==Source == | ==Source == | ||
Tintinalli | Tintinalli's | ||
[[Category:FEN]] | [[Category:FEN]] | ||
Revision as of 19:08, 10 September 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/hr KCl IV or PO
- every 10meq should inc serum by ~0.1meq/L
- Treat hypomag if present
Source
Tintinalli's