Overview
Acute pancreatitis is a sudden-onset, potentially life-threatening inflammatory disorder of the pancreas. It is characterized by severe abdominal pain and elevated pancreatic enzyme levels, ranging from mild self-limiting edema to severe necrotizing systemic disease.
Etiology & Causes
- Biliary (Gallstones): Most common cause (40%); gallstones obstruct the ampulla of Vater.
- Alcohol: Second most common (30%); chronic ethanol abuse causes direct acinar toxic injury.
- Other: Hypertriglyceridemia (>1000 mg/dL), trauma, post-ERCP, hypercalcemia, and drugs (e.g., azathioprine, valproate).
Pathophysiology
The core mechanism involves premature, intra-acinar activation of trypsinogen into active trypsin. This leads to an enzymatic cascade (lipase, elastase) causing auto-digestion of pancreatic parenchyma, microvascular injury, and local edema. Release of pro-inflammatory cytokines (IL-1, IL-6, TNF-alpha) can trigger systemic inflammatory response syndrome (SIRS), capillary leak, and multi-organ failure.
Epidemiology & Prevalence
- Prevalence/Incidence: 30–40 cases per 100,000 people annually in Western countries.
- Age/Gender: Biliary pancreatitis is more common in older females; alcohol-induced pancreatitis is more prevalent in young to middle-aged males.
Risk Factors
- Cholelithiasis (gallstones)
- Heavy alcohol consumption
- Obesity and metabolic syndrome
- Smoking
Physical Examination Findings
- Vitals: Tachycardia, tachypnea, low-grade fever, hypotension.
- Abdomen: Epigastric tenderness, guarding, rigidity, and hypoactive/absent bowel sounds (paralytic ileus).
- Signs of Hemorrhagic Pancreatitis (Rare): Cullen’s sign (periumbilical ecchymosis) or Grey Turner’s sign (flank ecchymosis).
Laboratory Tests & Diagnostics
Serum Lipase
- Type: Blood Test
- Purpose: Primary diagnostic marker of pancreatic injury.
- Expected Findings: Elevated $ge 3times$ upper limit of normal.
- Interpretation: Highly specific; rises within 4–8 hours and remains elevated for up to 14 days. Serum Amylase
- Type: Blood Test
- Purpose: Secondary marker of pancreatic injury.
- Expected Findings: Elevated $ge 3times$ upper limit of normal.
- Interpretation: Rises rapidly but normalizes within 3–5 days; less specific than lipase.
Recommended Remedies
📝 Clinical Insights & Notes:
Learn about acute pancreatitis, an inflammatory disease of the pancreas. Discover its causes, symptoms like severe back pain, diagnostic tests, and treatments.