anything done or to be done; anything requiring action or effort; business; concern: an affair of great importance. 2. affairs, matters of commercial or public interest or concern; the transactions of public or private business or finance:
Hyperlactatemia is defined as a persistent, mild to moderate (2-4 mmol/L) increase in blood lactate concentration without metabolic acidosis, whereas lactic acidosis is characterized by persistently increased blood lactate levels (usually >5 mmol/L) in association with metabolic acidosis.
Lactic acid does not exist in the blood. As soon as it is produced, the substance thought to be lactic acid disassociates into lactate and hydrogen (More on lactate and hydrogen below). A lactate analyzer measures the concentration of lactate (a useful fuel) in the blood.