Gastrointestinal bleeding refers to any form of bleeding that occurs within the gastrointestinal tract. This can range from mild, visible bleeding (e.g., blood in the stool) to severe, life-threatening bleeding (e.g., haematemesis—vomiting blood). The symptoms of this condition can vary depending on the location and severity, but they often include:
- Blood in stools (melena)—dark, tarry stools due to blood breakdown
- Bright red blood in the stool (haematochezia)
- Vomiting blood or material that looks like coffee grounds
- Weakness, dizziness, or fainting due to significant blood loss
Why Does Gastrointestinal Bleeding Happen?
Gastrointestinal bleeding can result from a variety of causes, which can be divided into three main categories:
- Oesophageal causes:
- Varices: Enlarged veins in the oesophagus, often due to liver disease, such as cirrhosis
- Oesophagitis: Inflammation or irritation of the oesophagus, often due to infections (e.g., Candida, herpes simplex virus) or gastro-oesophageal reflux disease (GORD)
- Mallory-Weiss tear: A tear in the mucous membrane at the junction between the oesophagus and stomach, often caused by severe vomiting
- Gastric causes:
- Peptic ulcers: Sores in the lining of the stomach or duodenum caused by excessive acid, H. pylori infection, or long-term use of NSAIDs
- Gastric erosions: Shallow areas of the stomach lining where the mucosa is damaged
- Gastric cancer: In advanced cases, cancerous growths can bleed
- Gastritis: Inflammation of the stomach lining, often due to alcohol, NSAIDs, or H. pylori infection
- Intestinal and bowel causes:
- Diverticulosis: Pouches in the colon can become inflamed or infected, leading to bleeding
- Angiodysplasia: Abnormal blood vessels in the intestines can bleed, especially in older adults
- Colorectal cancer: Tumours in the colon or rectum can bleed
- Inflammatory bowel diseases: Conditions like Crohn’s disease or ulcerative colitis can cause bleeding
When Does Gastrointestinal Bleeding Occur?
Gastrointestinal bleeding can occur at any age, but it is more common in:
- Older adults: Especially those over 60, due to an increased prevalence of conditions like peptic ulcers, diverticulosis, and colorectal cancer
- Individuals with predisposing factors: Those with a history of gastrointestinal disorders, chronic liver disease, or long-term NSAID use are at higher risk
How to Treat Gastrointestinal Bleeding
Treatment for gastrointestinal bleeding depends on the severity, location, and underlying cause. Immediate treatment is often necessary to stabilise the patient and prevent life-threatening complications:
- Stabilisation of the patient:
- Assessment: Initial evaluation includes stabilising vital signs, assessing the degree of blood loss, and determining the need for blood transfusions.
- IV fluids and blood transfusions: For significant blood loss, fluid replacement and transfusions may be required.
- Endoscopic evaluation:
- Gastroscopy: An endoscope is used to examine the upper gastrointestinal tract (oesophagus, stomach, duodenum) to locate the source of bleeding. Treatment can sometimes be delivered at the same time, such as cauterisation, clipping, or injection of medications to stop bleeding.
- Colonoscopy:
- Visualisation of the lower gastrointestinal tract (colon, rectum) allows for the detection and treatment of bleeding sites, such as diverticula, angiodysplasias, or colorectal polyps.
- Pharmacological treatment:
- Acid-suppressing drugs: Proton pump inhibitors (PPIs) may be used to reduce stomach acid production and promote healing, especially in cases of peptic ulcers or erosions.
- H. pylori eradication: In cases caused by H. pylori infection, a course of antibiotics combined with PPIs may be prescribed.
- Surgical intervention:
- Ligation or resection: In severe or persistent cases where endoscopic treatment is not sufficient, surgery may be required to control bleeding, such as resecting the affected area or performing a vascular ligation.
- Follow-up care:
- Monitoring and lifestyle changes: Regular follow-ups are necessary to monitor recovery and prevent recurrence. Lifestyle modifications, such as reducing NSAID use, limiting alcohol intake, and following a healthy diet, can help prevent bleeding episodes.
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