Diagnosis of Acute Pancreatitis
Once a working diagnosis of acute pancreatitis is reached, laboratory tests are obtained to support the clinical impression. In addition to confirming the diagnosis, laboratory tests are helpful in defining an etiology and looking for complications.
Serum amylase and lipase levels
They are typically elevated in persons with acute pancreatitis. Serum amylase determinations are routinely available, but they are not specific for pancreatitis.
Lipase has a slightly longer half-life and abnormalities may support the diagnosis if a delay occurs between the pain episode also the time the patient seeks medical attention.
Elevated lipase levels are more specific to the pancreas than elevated amylase levels. The level of serum amylase or lipase does not indicate whether the disease is mild, moderate, or severe, and monitoring levels serially during the course of hospitalization does not offer insight into prognosis.
blood urea nitrogen
Obtain measurements for blood urea nitrogen (BUN), creatine, and electrolytes; a great disturbance in the electrolyte balance usually found, secondary to third spacing of fluids. Measure blood glucose level because it may be elevated from B-cell injury in the pancreas.
Measure calcium, cholesterol, and triglyceride levels to search for an etiology of pancreatitis (such as; hypercalcemia or hyperlipidemia) or complications of pancreatitis (for example, hypocalcemia resulting from saponification of fats in the retroperitoneum).
A complete blood count (CBC) demonstrates leukocytosis (white blood cell (WBC) count higher than 12,000/µL) with the differential being shifted toward the segmented polymorphonuclear (PMN) cells. Leukocytosis may represent inflammation or infection.
Abdominal radiographs have a limited role in acute pancreatitis.
Ultrasonography of the abdomen is the most useful initial test in determining the etiology of pancreatitis and is the technique of choice for detecting gallstones. Although ultrasonography can be used as a screening test, it may not be specific if overlying gas shadows secondary to bowel distention are present. Ultrasonography cannot measure the severity of disease.
CT is an important common initial assessment tool for acute pancreatitis.
Imaging is indicated during the initial presentation if i.e.:
- The diagnosis of acute pancreatitis is uncertain
- There is abdominal distension also tenderness, fever>102, or leukocytosis
- But Not improvement after 72 hours of conservative medical therapy
- There has been an acute change in status: fever, pain, or shock
While CT considered the gold standard in diagnostic imaging for acute pancreatitis, magnetic resonance imaging (MRI) has become increasingly valuable as a tool for the visualization of the pancreas, particularly of pancreatic fluid collections and necrotized debris. Additional utility of MRI includes its indication for imaging of patients with an allergy to CT’s contrast material, and an overall greater sensitivity to hemorrhage, vascular complications, pseudoaneurysms, also venous thrombosis. [1]