Upper Gastrointestinal Bleeding

Etiology

From the possible etiologies of UGIB, Peptic Ulcer disease (PUD) accounts for 40% to 50% of the cases. Of those, the majority is secondary to duodenal ulcers (30%). PUD can be associated with NSAIDs, Helicobacter pylori, and stress-related mucosal disease.[4][5]

Aside from PUD, erosive esophagitis accounts for 11%, duodenitis for 10%, Varices 5% to 30% (depending if the population studied have a chronic liver disease), Mallory-Weiss tear 5% to 15% and vascular malformations for 5%.

Epidemiology

UGIB accounts for 75% of all acute gastrointestinal (GI) bleeding cases. Its annual incidence is approximately 80 to 150 per 100,000 population. Patients on long-term, low-dose aspirin have a higher risk of overt UGIB compared to placebo. When aspirin is combined with  P2Y12 inhibitors such as clopidogrel, there is a two-fold to three-fold increase in the number of UGIB cases. When a patient requires triple therapy (i.e., aspirin, P2Y12 inhibitor and vitamin K antagonist), the risk of UGIB is even higher.[6]

History and Physical

During history taking, attention should be given to comorbidities. A detailed review of current medications should be performed, and patients should be directly asked about the use of NSAIDs, antiplatelet drugs, aspirin, or anticoagulants. Also, it is important to get a detailed social history regarding alcohol use.

The clinical presentation can vary but should be well-characterized. Hematemesis is the overt bleeding with vomiting of fresh blood or clots. Melena refers to dark and tarry-appearing stools with a distinctive smell. The term "coffee-grounds" describes gastric aspirate or vomitus that contains dark specks of old blood. Hematochezia is the passage of fresh blood per rectum. The latter is usually a reflection of lower gastrointestinal bleeding (LGIB) but may be seen in patients with brisk UGIB.

Patients may also present with syncope or orthostatic hypotension if bleeding is severe enough to cause hemodynamic instability.

One should also pay attention to the patient's vital signs. Orthostatic vital signs should also be documented. In a comprehensive exam, search for evidence of chronic liver diseases such as palmar erythema, spider angiomas, gynecomastia, jaundice, and ascites. These features may give clues to the etiology of the bleeding (i.e., variceal bleeding).

Evaluation

Initial laboratory work must include a complete blood cell count (CBC) to look for current levels of hemoglobin, hematocrit, and platelets. A low MCV can point towards chronic blood loss and iron deficiency anemia. Chemistry should also be evaluated. Elevated BUN or elevated BUN/Creatinine can also be indicative of UGIB. Coagulation panel should also be checked.[7][8][9]

There are few scoring systems designed to predict which patients will likely need intervention and also to predict rebleeding and mortality. The Rockall score was designed to predict rebleeding and mortality and includes age, comorbidities, the presence of shock, and endoscopic stigmata. A pre-endoscopic Rockall is also available and can be used to stratify patient's risk for rebleeding and mortality even before the endoscopic evaluation. When the Rockall score is used, patients with two or fewer points are considered low risk and have a 4.3% probability of rebleeding and 0.1% mortality. In contrast, patients with a score of six or more have a rebleeding rate of 15% and mortality of 39%.

Another scoring system that is traditionally used in UGIB is the Blatchford Score. This scoring system was designed to predict the need for intervention. It includes hemoglobin levels, blood pressure, presentation of syncope, melena, liver disease, and heart failure. A score of six or higher is associated with a greater than 50% risk of needing an intervention.

If the patient is suspected of having UGIB, endoscopy (EGD) must be performed to identify the cause and potentially treat the source of bleeding. Multiple studies have tried to identify the best timing to perform endoscopy. Until now, there is no evidence that emergent EGD is superior to routine EGD (done in 24 to 48 hours). The American College of Gastroenterology continues to recommend that all patients with UGIB should undergo endoscopy within 24 hours of admission, following resuscitative efforts to optimize hemodynamic parameters and other medical problems. Per American College of Gastroenterology recommendations, endoscopy within 12 hours should be considered for all patients with higher risk clinical features (e.g., tachycardia, hypotension, bloody emesis or nasogastric aspirate in the hospital) to potentially improve clinical outcomes.[10][11]

Treatment / Management

Patients must have a minimum of two large-bore peripheral access catheters (at least 18-gauge). Intravenous fluids should be administered to maintain adequate blood pressure and hemodynamic stability. If patients are not able to protect their airways or have ongoing severe hematemesis, elective endotracheal intubation is advised.

Blood transfusions should be given to target a hematocrit above 20%, with a hematocrit above 30% targeted in high-risk patients, such as the elderly and patients with coronary artery disease. There is no evidence that higher targets for hematocrit goals should be sought as that higher targets can even be deleterious.[12][13][14][15](B3)

Proton pump inhibitors (PPI) are used to treat patients with nonvariceal UGIB. The use of antacids has been shown to alter the natural history of patients with acute upper GI bleeding. Patients with significant bleeding should be treated with an 80-mg bolus of PPI followed by a continuous infusion. The typical duration is 72 hours for patients with high-risk lesions visualized on EGD. If endoscopy was normal or only revealed low-risk lesion, PPI infusion can be discontinued and patient switch to a daily twice a day infusion or even to oral PPIs.

Octreotide, a somatostatin analog, is a medication used when variceal bleeding is suspected. It is given as an intravenous bolus of 20 mcg to 50 mcg, followed by a continuous infusion at a rate of 25 mcg to 50 mcg per hour.  Its use is not recommended in patients with acute nonvariceal upper GI bleeding, but it can be used as adjunctive therapy in some cases. Its role is limited to settings in which endoscopy is unavailable or as a means to help stabilize patients before definitive therapy can be performed.

Endoscopic intervention might be warranted depending on the findings during the upper endoscopy. If a patient has an ulcer with a clean base, no intervention is needed. However, if a bleeding vessel is visualized or there is stigmata of recent bleeding, therapeutic options might include thermal coagulation to achieve hemostasis, local injection of epinephrine or use of clips. A combination of these methods might be needed based on the severity of the lesions.

Differential Diagnosis

• Abdominal aortic aneurysm

• Acute gastritis

• Barret's oesophagus

• Esophageal cancer

• Esophagitis

• Gastric cancer

• Gastric outlet obstruction

• Gastric ulcer

• Gastrinoma