Sampling, index, assessmentArterial

Sampling, index, assessment
Arterial and venous blood samples were taken
simultaneously from all patients for blood gas analyses
(using ABL 725, Radiometer®, Baye, USA) and
measurement of sodium (Na+), potassium (K+), chloride
(Cl−), glucose (Glu), blood urea nitrogen (BUN),
creatinine (Cr), alanine aminotransferase (ALT), glutamic
oxaloacetic transminase (GOT), total bilirubin (TBIL)
and direct bilirubin (DBIL) by fully automated analyser
(Johnson, USA). Serum lactic acid and ammonia were
tested in selected patients according to their condition
and diseases. Acid-base homeostasis or imbalance was
judged according to the samples taken upon arrival.
Subsequent blood gas and serum electrolytes were
monitored simultaneously at 6 hours, 12 hours, 24 hours,
48 hours and 72 hours after therapy. Acid-base status
was assessed and judged by Expected Compensation
Formulae (Table 1), anion gap (AG) and potential
bicarbonate (HCO3
−).3-5 AG was calculated by Na+-
(HCO3
−+ Cl−); and the potential bicarbonate was
calculated by HCO3
− +