Hypokalemia: Difference between revisions

Revision as of 02:47, 3 March 2011

Low = <3.5meq/L

Low! = <2.5meq/L

Symptoms:

1) CNS (weakness, cramps, hyporeflexia)

2) GI (ileus)

3) CV (dysrhythmia, dig tox, U waves, ST depression, prolonged QT)

4) Renal (met alkalosis)

A. Shift

B. Reduced intake

C. Increased loss

D. Drugs

E. GI Loss (v/d/fistula)

20meq/h KCl IV or PO

every 10meq should inc serum by ~0.1meq/L)

2/7/06 DONALDSON (adapted from Tintinalli)

Authors:

@@ Line 15: / Line 15: @@
 ) CNS (weakness, cramps, hyporeflexia)
-) GI (ileaus)
+) GI (ileus)
 ) CV (dysrhythmia, dig tox, U waves, ST depression, prolonged QT)
 ) Renal (met alkalosis)
 ==DDX==
 A. Shift
+* Increased pH
-) Increased pH
+* B-agonist, inuslin
-) B-agonist, inuslin
 B. Reduced intake
 C. Increased loss
+* Renal
+** Primary (hyperaldos, osmotic diuresis)
+** Secondary (diuretics, malignant HTN, renal art stenosis)
+** Misc
+*** Licorice
+*** HyperCa
+*** HypoMg
+*** RTA
+*** Leukemia
-) Renal
+D. Drugs
+* PCN
-          i) Primary (hyperaldos, osmotic diuresis)
+* Lithium
+* L-dopa
-          ii) Secondary (*diuretics, malignant HTN, renal art stenosis)
+* Theophyline
-          iii) Misc (licorice, hyperCa, Mg def, RTA, leukemia)
-          iv) Drugs (PCN, lithium, L-dopa, theophyline)
-) GI Loss (v/d/fistula)
+E. GI Loss (v/d/fistula)
 ==Treatment==
 meq/h KCl IV or PO
-(every 10meq should inc serum by ~0.1meq/L)
+every 10meq should inc serum by ~0.1meq/L)
 *treat hypomag if present
 ==Source ==
@@ Line 65: / Line 60: @@
 /7/06 DONALDSON (adapted from Tintinalli)
 [[Category:FEN]]