Ascending Cholangitis

What happens in ascending cholangitis

Bile is made in the liver and flows through the bile ducts into the small intestine (duodenum). Normally bile is sterile, because constant flow and a muscular valve at the duct's exit (the sphincter of Oddi) keep gut bacteria out.

When something blocks the duct, two things happen together:

1. Bile stagnates. Pressure in the ducts rises.
2. Bacteria ascend from the duodenum into the trapped bile and multiply.

High pressure pushes bacteria and their toxins from the bile ducts into the bloodstream. That is why cholangitis turns into bloodstream infection and sepsis so quickly, and why relieving the blockage is as important as the antibiotics. The usual bacteria are gut organisms: E. coli, Klebsiella, Enterococcus and sometimes anaerobes.

"Ascending" refers to this upward route of infection. In practice, ascending cholangitis and acute cholangitis mean the same thing. It differs from primary sclerosing cholangitis, a long-term inflammatory disease of the ducts that is not caused by infection.

Signs of ascending cholangitis

Charcot's triad

The three classic signs, described in 1877, are:

• Fever, often with rigors (shaking chills): present in about 90% of cases
• Jaundice: yellow skin and whites of the eyes, from bilirubin backing up
• Right upper quadrant pain: a constant ache under the right ribs, sometimes spreading to the back or right shoulder

All three appear together in only about half of patients, so the diagnosis cannot rest on the triad alone.

Reynolds' pentad

Severe cholangitis adds two more signs:

• Confusion or drowsiness
• Low blood pressure (shock)

Reynolds' pentad signals septic shock and needs drainage within hours.

Other symptoms

• Dark urine, like tea or cola
• Pale, clay-colored stools
• Itching
• Nausea and vomiting
• In older adults: confusion, falls or general weakness may be the only signs, sometimes without fever or pain

Causes and risk factors

Risk is higher in people over 50, people with known gallstones, and anyone with a bile duct stent or previous biliary surgery.

How it is diagnosed

Doctors use the Tokyo Guidelines, which combine three areas:

1. Signs of inflammation: fever above 38 °C (100.4 °F), high white blood cell count or raised C-reactive protein
2. Signs of blocked bile: jaundice (bilirubin of 2 mg/dL or more) or abnormal liver blood tests (raised ALP, GGT, ALT, AST)
3. Imaging: a widened bile duct or a visible cause such as a stone, stricture or stent

Tests usually include:

• Blood tests: full blood count, liver function, kidney function, clotting and lactate
• Blood cultures before antibiotics, to identify the bacteria
• Abdominal ultrasound: the first scan. It shows gallstones and a dilated duct but often misses stones low in the duct.
• CT scan: useful if the diagnosis is uncertain or cancer is suspected
• MRCP: an MRI of the bile ducts, very good at showing stones and strictures without an endoscope
• Endoscopic ultrasound (EUS): a camera-mounted ultrasound in the duodenum that detects small stones

Severity grades

Treatment

Immediate care

• IV fluids to restore blood pressure and kidney function
• IV antibiotics that cover gut bacteria, started promptly (ideally within an hour in septic patients) and adjusted once cultures return. A course typically lasts 4 to 7 days after the blockage is cleared.
• Pain relief and anti-sickness medicines
• Intensive care if blood pressure stays low

Draining the bile duct

Antibiotics cannot clear an infection trapped under pressure. The duct must be opened:

• ERCP (endoscopic retrograde cholangiopancreatography): a flexible camera passes through the mouth into the duodenum. The doctor cuts the sphincter (sphincterotomy), removes stones with a balloon or basket, or places a plastic stent to let bile drain. It is the first-choice procedure.
• Percutaneous transhepatic biliary drainage (PTBD): a tube is placed through the skin and liver into the duct under X-ray guidance when ERCP fails or is not possible, for example after gastric bypass surgery.
• EUS-guided drainage: an option in specialist centers.
• Surgery: rarely needed as an emergency now.

Preventing a recurrence

Once recovered, most people who had gallstone cholangitis are advised to have their gallbladder removed (laparoscopic cholecystectomy), usually during the same admission or within a few weeks. Without it, stones often return. People with stents need them changed on schedule.

Complications

• Sepsis and septic shock
• Liver abscesses
• Acute pancreatitis from the same stone
• Kidney failure
• Complications of ERCP: pancreatitis, bleeding or perforation (uncommon)

Outlook

Before endoscopic drainage was available, severe cholangitis was frequently fatal. With prompt antibiotics and ERCP, most people recover fully. Mortality today is low for mild and moderate cases but remains significant in severe cholangitis, particularly in older adults with other illnesses and when drainage is delayed. Cholangitis caused by cancer carries the outlook of the underlying tumor.

Frequently asked questions

What are the signs of ascending cholangitis?

The classic signs are fever with shaking chills, yellow skin or eyes (jaundice) and pain under the right ribs, known as Charcot's triad. Severe cases add confusion and low blood pressure. Dark urine, pale stools and itching are common. Older adults may only seem confused or weak.

What causes ascending cholangitis?

A blockage in the bile duct lets bacteria from the intestine travel up into trapped bile. Gallstones in the common bile duct cause most cases. Other causes include blocked stents, scar-tissue narrowing, tumors of the pancreas or bile ducts, and procedures on the bile ducts.

Is ascending cholangitis life-threatening?

It can be. The infection spreads into the blood easily because bile is under high pressure, and it can cause septic shock within hours. With fast antibiotics and drainage of the bile duct, most people recover well. Delay increases the risk of death, especially in older adults.

What is the difference between cholangitis and cholecystitis?

Cholecystitis is inflammation of the gallbladder, usually from a stone blocking its outlet. It causes right upper belly pain and fever but jaundice is uncommon. Cholangitis is infection of the bile ducts below the liver, typically with jaundice, and it is more dangerous because of the sepsis risk.

How long does it take to recover from cholangitis?

Many people feel much better within a day or two of ERCP drainage. Antibiotics usually continue for 4 to 7 days after the duct is cleared. A hospital stay of several days is typical, and gallbladder removal is often planned to prevent another episode.