<prompt> Answer this question truthfullyWhat are the natural history, prognosis, and possible complications of acute pancreatitis?  <response>: <reason> Severity scoring systems can be cumbersome to utilize and no single system has been established as a gold standard. Nevertheless, clinicians may find utility in using the following scoring systems, in conjunction with serial CT scans, and regular and thorough clinical assessments of the patient. Acute Physiology And Chronic Health Evaluation APACHE II score 8 points predicts 11 to 18 mortality Online calculatorHemorrhagic peritoneal fluid Obesity Indicators of organ failure Hypotension SBP 90 mmHG or tachycardia 130 beatmin PO 2 60 mmHg Oliguria 50 mLh or increasing BUN and creatinine Serum calcium 1.90 mmolL 8.0 mgdL or serum albumin 33 gL 3.2.gdLThe death rate is high with:Hemorrhagic pancreatitis Liver, heart, or kidney impairment Necrotizing pancreatitisThe APACHE score has been combined with a higher weight given to Obesity, in what is now defined as the APACHE-O score.The Glasgow criteria is valid for both gallstone and alcohol induced pancreatitis. If a patient scores 3 or more, it indicates severe pancreatitis and the patient should be transferred to ITU.PaO2 8kPa Age 55 years old Neutrophilia - WCC 15x109L Serum calcium 2mmolL Renal function, Urea 16mmolL LDH 600iuL; AST 200iuL Albumin 32gL serum Blood glucose 10mmolLBedside index for severity in acute pancreatitis BISAP, has been proposed as an accurate method for early identification of patients at risk for in-hospital mortality. Criteria used in this score are as follows:Blood urea nitrogen - 25 Impaired mental status Systemic inflammatory response syndrome SIRS - 2 criteria Age - 60 yrs Pleural effusion on CTScoring system:The advantages of BISAP score over other scoring systems are:Accuracy Simple Easy to obtain Prognostic efficacy similar to other scoring systems 