Biochemical analysis
LP and SSLX measure lactate in whole blood by amperometry, whereby
lactate is converted into pyruvate and hydrogen peroxide, which is then
oxidized. The resulting electric current is proportional to the lactate
level. LP was calibrated for every 25th analysis with a control
test-strip and SSLX was calibrated daily with a test solution. SSLX
requires only 0.6μL of blood and
13s for analysis. SSLX measures lactate in the range 0.3-20mmol/L and
interferences of haematocrit, paracetamol, bilirubin, acetaminophen,
ascorbic and uric acid are eliminated by algorithms. To ensure an
acceptable agreement between the two BGAs, 108 fresh arterial and venous
cord samples were analysed in parallel.