Cholangitis is an acute bacterial infection of the bile ducts resulting from common bile duct obstruction and is potentially life-threatening (mortality 5-10%, acute bacterial infection of the bile ducts
Diagnosis is based on clinical findings and while imaging can be supportive, it is frequently non-diagnostic. Look for RUQ tenderness with peritoneal signs and fever
A normal ultrasound does not rule out acute cholangitis
Treatment focuses on supportive care, broad spectrum antibiotics and consultation with a provider that can provide biliary tract decompression (IR, gastroenterology or general surgery)