Which parameter is NOT part of Ranson's criteria?

Ranson's criteria is a set of clinical criteria used to assess the severity of acute pancreatitis and predict mortality risk. The criteria include various parameters that help determine the prognosis of a patient with this condition. The specific components of Ranson's criteria involve age, white blood cell count, blood glucose levels, serum lactate dehydrogenase (LDH), aspartate aminotransferase (AST), total serum calcium, base deficit, and fluid sequestration.

Electrolyte levels are not included as a specific parameter in Ranson's criteria. The focus is rather on the other elements that directly reflect the impact of the pancreatitis and the body's response to it. Parameters such as age over 55 years, LDH greater than 350, and a base deficit greater than 4 are all part of this scoring system, aiding clinicians in predicting the outcome and deciding on the management of acute pancreatitis.