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Link to original content: https://pubmed.ncbi.nlm.nih.gov/9672294
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Review
. 1998 Jul 11;352(9122):135-40.
doi: 10.1016/S0140-6736(98)85044-7.

Potassium

M L Halperin  1 , K S Kamel
Affiliations
Review

Potassium

M L Halperin et al. Lancet. .

Abstract

In a logical, stepwise approach to patients presenting with hypokalaemia or hyperkalaemia the clinician must first recognise circumstances in which the dyskalaemia represents a clinical emergency because therapy then takes precedence over diagnosis. If a dyskalaemia has been present for a long time, there is an abnormal renal handling of K+. The next step to analyse is the rate of excretion of K+ and, if necessary, its two components (urine flow rate and K+ concentration in the cortical collecting duct [CCD]) analysed independently. If the K+ concentration in the CCD is not in the expected range, its basis should be defined at the ion-channel level in the CCD from clinical information that can be used to deduce the relative rates of reabsorption of Na+ and Cl- in the CCD. This analysis provides the basis for diagnosis and may indicate where non-emergency therapy should then be directed.

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