Pancreatic enzymes are spilt into the bloodstream. Lipase is more specific for pancreas than amylase (Neither has any bearing on prognosis as per the prognostic criteria).

Any very ill individual should have abdominal imaging to assess necrosis and rule out infected necrosis or abscess formation.

CT is much better than U/S. One may expect to find pseudocyst (treated with internal drainage) or abscess (treated with external drainage) or necrotic tissue (phlegmon-treated by debridement).