Gastroparesis: Symptoms, Causes, and Treatment

What is Gastroparesis?

Gastroparesis, also called delayed gastric emptying, is a disorder in which the stomach takes too long to empty its contents. Normally, the stomach contracts to move food down into the small intestine for digestion. The vagus nerve controls these contractions. Gastroparesis occurs when the vagus nerve is damaged or stops working, causing food to move slowly or stop moving through the digestive system.

This condition can interfere with normal digestion, cause nausea and vomiting, and lead to problems with blood sugar levels and nutrition. According to the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), gastroparesis is more common in people with type 1 or type 2 diabetes.

Common Causes

Gastroparesis is often caused by damage to the vagus nerve, which regulates the digestive system. The most common causes include:

• Diabetes: High blood sugar levels can damage the vagus nerve over time, leading to gastroparesis. This is the most common known cause.
• Post-surgical complications: Surgery on the stomach or vagus nerve, such as gastric bypass or fundoplication, can lead to gastroparesis.
• Infections: Viral infections, such as norovirus or rotavirus, can cause gastroparesis, especially if they damage the vagus nerve.
• Medications: Certain drugs, such as narcotics (e.g., opioids), antidepressants, and some high blood pressure medications, can slow gastric emptying.
• Scleroderma: This connective tissue disorder can affect the stomach's ability to contract properly.
• Nervous system diseases: Conditions like Parkinson’s disease or multiple sclerosis can affect the nerves controlling the stomach.
• Hypothyroidism: An underactive thyroid can slow down digestion and contribute to gastroparesis.
• Amyloidosis: A rare condition where abnormal proteins build up in organs, including the stomach.
• Idiopathic gastroparesis: In many cases, the cause is unknown (idiopathic). This accounts for about one-third of gastroparesis cases.

According to the Mayo Clinic, women are more likely to develop gastroparesis than men.

Associated Symptoms

Gastroparesis can cause a variety of symptoms, which may vary in severity. Common symptoms include:

• Chronic nausea
• Vomiting, especially vomiting undigested food hours after eating
• Early satiety (feeling full quickly when eating)
• Abdominal bloating
• Abdominal pain or discomfort
• Heartburn or gastroesophageal reflux (GERD)
• Poor appetite
• Weight loss and malnutrition
• Unpredictable blood sugar levels (in people with diabetes)

Symptoms can range from mild to severe and may come and go. Some people experience flare-ups, while others have persistent symptoms. The Centers for Disease Control and Prevention (CDC) notes that severe cases can lead to dehydration, malnutrition, and poor quality of life.

When to See a Doctor

It’s important to see a healthcare provider if you experience persistent symptoms of gastroparesis, especially if they interfere with your daily life. Seek medical attention if you have:

• Frequent vomiting, particularly if you see undigested food
• Difficulty keeping food or liquids down
• Significant weight loss without trying
• Severe abdominal pain or bloating
• Blood sugar levels that are difficult to control (for people with diabetes)
• Signs of dehydration, such as dark urine, dizziness, or extreme thirst

Early diagnosis and treatment can help manage symptoms and prevent complications like malnutrition or severe dehydration.

Diagnosis

Diagnosing gastroparesis involves a combination of medical history, physical examination, and diagnostic tests. Your doctor may recommend the following:

• Gastric Emptying Study: This is the most common test for gastroparesis. You eat a light meal (often eggs) containing a small amount of radioactive material, and a scanner tracks how quickly the food leaves your stomach.
• Upper Endoscopy: A thin, flexible tube with a camera is inserted through your mouth to examine the stomach and rule out other conditions like ulcers or blockages.
• Upper GI Series: X-rays are taken after you drink a chalky liquid (barium) to highlight the stomach and small intestine.
• SmartPill: A small, electronic device is swallowed to measure how quickly food moves through the digestive tract.
• Blood Tests: These can check for conditions like diabetes, thyroid disorders, or nutritional deficiencies.

The Cleveland Clinic emphasizes that ruling out other conditions with similar symptoms, such as peptic ulcers or gastritis, is crucial for an accurate diagnosis.

Treatment Options

Treatment for gastroparesis focuses on managing symptoms, improving stomach emptying, and addressing the underlying cause. Options include:

Medications

• Prokinetic Agents: Drugs like metoclopramide (Reglan) help stimulate stomach contractions to improve emptying.
• Anti-nausea Medications: Medications like ondansetron (Zofran) or promethazine can help control nausea and vomiting.
• Pain Relievers: Low-dose tricyclic antidepressants or other pain modifiers may be used for abdominal discomfort.
• Botulinum Toxin (Botox) Injections: Injected into the pylorus (the valve between the stomach and small intestine) to relax it and improve emptying.

Dietary Changes

• Eat smaller, more frequent meals (4-6 small meals per day).
• Avoid high-fat and high-fiber foods, which are harder to digest.
• Choose liquids or pureed foods if solids are difficult to tolerate.
• Stay hydrated by sipping water throughout the day.
• Limit carbonated drinks and alcohol.

Other Treatments

• Gastric Electrical Stimulation: A device implanted in the abdomen sends mild electrical pulses to the stomach to help control nausea and vomiting.
• Feeding Tube: In severe cases, a jejunostomy tube may be placed to deliver nutrients directly to the small intestine.
• Intravenous (IV) Nutrition: For extreme cases where oral or tube feeding isn’t possible, nutrients are delivered directly into the bloodstream.

The World Health Organization (WHO) notes that managing underlying conditions, such as diabetes, is critical for long-term control of gastroparesis.

Prevention Tips

While not all cases of gastroparesis can be prevented, you can reduce your risk by:

• Managing chronic conditions like diabetes by keeping blood sugar levels under control.
• Avoiding medications that slow gastric emptying unless absolutely necessary.
• Eating a balanced diet rich in fruits, vegetables, and lean proteins.
• Staying hydrated and avoiding excessive alcohol or carbonated beverages.
• Exercising regularly to promote healthy digestion.
• Seeking prompt treatment for infections that could affect the vagus nerve.

If you have diabetes, work closely with your healthcare team to monitor and manage your condition effectively.

Emergency Warning Signs

Seek immediate medical attention if you experience any of the following:

• Inability to keep any food or liquids down for more than 24 hours
• Severe abdominal pain or swelling
• Signs of dehydration, such as extreme thirst, dry mouth, dark urine, or dizziness
• Blood in vomit or stool
• Rapid heart rate or confusion (signs of severe dehydration or electrolyte imbalance)
• Sudden, unexplained weight loss (more than 10% of body weight)

These symptoms may indicate a serious complication, such as a bowel obstruction or severe malnutrition, which requires urgent medical care.

For more information, consult reputable sources like the NIDDK, Mayo Clinic, or your healthcare provider.