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ID:163 Potassium
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DescriptionPart of U&E profile. Although potassium is predominantly an intracellular ion, it is the serum concentration that is of immediate importance in therapy. Severe hyperkalaemia or hypokalaemia, if severe, must be treated immediately. Hypokalaemia is usually the result of potassium depletion and hyperkalaemia occurs most commonly when the rate of potassium leaving the cells is greater than its rate of excretion.
Additional Info
Concurrent Testsna
Dietary Requirementsna
InterpretationCritical action limits <2.5 mmol/L and >6.5 mmol/L

TubeSerum or Heparin
Tube Picture
Collection ConditionsUse Gold top (serum gel) tube except for Intensive care units, renal unit, transplant unit, patients on IV heparin (use Green/Yellow top tube for these patients).
Min. Vol1 mL

Ref. Range (Male)3.5 - 5.3
Ref. Range (Female)3.5 - 5.3
Ref. Range (Paed)see info below
Ref. Range Notespaediatric reference ranges: 0 - 4 wks: 3.4 - 6.0, 4 wks - 1 yr: 3.5 - 5.7, 1 - 16 yr: 3.5 - 5.0
IP Acute TATRefer to Website
IP Routine TATRefer to Website
GP Acute TAT- Contact Laboratory
GP Routine TATRefer to Website
Turnround CommentMinimum retest interval = 12 hours

Originally edited by : MC. Review due on 21/06/2017 11:50:36. Published By S.Bennett on 21/06/2016 11:50:36.