Near-patient potassium and sodium measurements: evaluation of ion-selective electrodes (Ionometer EF2) in a dialysis department.
For potassium and sodium monitoring, an Ionometer EF2 was installed in our dialysis unit. The apparatus measured linearly, and between-series and within-series variations were comparable to flame photometry. No difference in performance was disclosed when operated by one or several persons. The 95% limits of agreement between Ionometer EF2 and flame photometry were for potassium -0.29 and 0.43 mmol/l and for sodium -5.0 and 2.89 mmol/l, respectively. Contrary to sodium, the accidental difference for potassium was greater than expected from analytical variation.
Madsen
H H
HH
Department of Nephrology, Odense University Hospital, Denmark.
Antonsen
S
S
Nielsen
H K
HK
D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D004566:Electrodes; D005260:Female; D006801:Humans; D007676:Kidney Failure, Chronic / Q000628:therapy; D008297:Male; D008875:Middle Aged; D010783:Photometry / Q000295:instrumentation / Q000379:methods; D011188:Potassium / Q000097:blood*; D006435:Renal Dialysis; D015203:Reproducibility of Results; D012964:Sodium / Q000097:blood*
D012964:Sodium; D011188:Potassium