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Gallbladder Atony: Causes, Symptoms & Treatment

Gallbladder atony is a condition in which the gallbladder loses its ability to contract properly, impairing the release of bile into the digestive tract.

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Things worth knowing about "Gallbladder Atony"

Gallbladder atony is a condition in which the gallbladder loses its ability to contract properly, impairing the release of bile into the digestive tract.

What is Gallbladder Atony?

Gallbladder atony is a functional disorder characterized by a reduced or absent ability of the gallbladder to contract and expel stored bile into the small intestine. The gallbladder is a small, pear-shaped organ located beneath the liver. Its primary role is to store bile produced by the liver and release it during meals to support fat digestion. When the gallbladder cannot contract adequately, bile accumulates, leading to digestive discomfort and an increased risk of complications. This condition is also referred to as gallbladder hypokinesia or biliary dyskinesia.

Causes

Gallbladder atony can result from a variety of underlying conditions and contributing factors:

Hormonal changes: Pregnancy or the use of estrogen-containing medications can reduce gallbladder motility.
Nerve damage: Diabetic neuropathy, a complication of long-standing diabetes mellitus, can impair the nerve signals that trigger gallbladder contraction.
Prolonged fasting or total parenteral nutrition: Without oral food intake, the gallbladder does not receive adequate hormonal stimulation to contract regularly.
Medications: Opioid analgesics, anticholinergic drugs, and somatostatin analogues are known to inhibit gallbladder motility.
Systemic diseases: Hypothyroidism, celiac disease, and chronic inflammatory bowel conditions may contribute to reduced gallbladder function.
Critical illness: Severely ill or ICU patients are at risk of developing acute acalculous cholecystitis, an acute form of gallbladder atony without gallstones.
Idiopathic: In some cases, no identifiable cause is found.

Symptoms

The symptoms of gallbladder atony are often non-specific and may include:

Dull pain or pressure sensation in the upper right abdomen
Nausea and a feeling of fullness, especially after fatty meals
Bloating and general digestive discomfort
Intolerance to high-fat foods
Occasional vomiting
Bile stasis and an increased risk of developing gallstones

In severe cases, particularly acute acalculous cholecystitis, symptoms may include intense abdominal pain, fever, and a general feeling of illness, which constitutes a medical emergency.

Diagnosis

Several diagnostic methods are used to evaluate gallbladder atony:

Abdominal ultrasound: The primary imaging method for assessing gallbladder size and bile stasis. An enlarged gallbladder may suggest impaired emptying.
Hepatobiliary iminodiacetic acid (HIDA) scan: A nuclear medicine imaging test that measures the gallbladder ejection fraction after stimulation with the hormone cholecystokinin (CCK). An ejection fraction below 35-40% is generally considered abnormal.
Dynamic ultrasound or MRI after fatty meal stimulation: Assesses the contractile response of the gallbladder after food or hormonal stimulation.
Laboratory tests: Liver enzymes, inflammatory markers, thyroid hormone levels, and blood glucose can help identify underlying causes.

Treatment

Treatment depends on the underlying cause and the severity of symptoms:

Conservative Management

Dietary modification: A low-fat, easily digestible diet to reduce the burden on the gallbladder and improve digestive comfort.
Treating the underlying cause: Discontinuing or switching offending medications; managing underlying conditions such as hypothyroidism or diabetes mellitus.
Cholecystokinin infusions: Intravenous administration of CCK may be used in selected patients to stimulate gallbladder emptying.

Surgical Treatment

For patients with persistent, significant symptoms and confirmed gallbladder dysfunction, a laparoscopic cholecystectomy (minimally invasive surgical removal of the gallbladder) may be considered. Evidence suggests that many patients experience meaningful symptom relief following surgery.

Emergency Treatment

Acute acalculous cholecystitis requires immediate hospitalization, intravenous antibiotics, and often urgent surgical or percutaneous drainage.

References

Shaffer, E.A. (2006): Gallbladder disease. In: Clinical Gastroenterology and Hepatology, Elsevier.
Ponsky, T.A. et al. (2005): The Role of Scintigraphy in the Diagnosis of Gallbladder Dysfunction. Surgical Endoscopy, 19(5), 580-602.
Zakko, S.F. (2021): Acalculous cholecystitis. In: UpToDate, Wolters Kluwer.

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