Apparent hyperkalaemia from blood sampled from an arterial cannula.

Abstract:

:Blood samples were obtained from a radial artery cannula in a 60-yr-old man during coronary artery surgery. Serum potassium concentrations of 9.3, 8.4, and 7.4 mmol litre(-1) were obtained. A simultaneous venous blood sample gave a serum potassium concentration of 4.4 mmol litre(-1). The ECG was unchanged. After the arterial cannula was repositioned, subsequent blood samples gave expected ranges of serum potassium concentration. We suggest that the initial arterial cannula position caused a high shear rate in the blood when samples were withdrawn, causing haemolysis and hyperkalaemia.

journal_name

Br J Anaesth

authors

Mehta V,Ahmed Z

doi

10.1093/bja/aeh199

subject

Has Abstract

pub_date

2004-09-01 00:00:00

pages

456-8

issue

3

eissn

0007-0912

issn

1471-6771

pii

S0007-0912(17)35894-4

journal_volume

93

pub_type

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