Hematemesis

Lore & Background

Hematemesis is defined as the vomiting of blood, usually bright red, and originates from the upper gastrointestinal tract, including the esophagus, stomach, and parts of the small intestine. It tends to occur only after significant blood loss. The condition must be distinguished from hemoptysis (coughing up blood) and epistaxis (nosebleed), which are more common and can be confused with hematemesis.

Reader's Guide

Hematemesis is a critical symptom of acute upper gastrointestinal bleeding and is treated as a medical emergency. The primary goal in management is to assess blood loss and prevent hypovolemic shock, which can lead to organ damage or cerebral atrophy. Investigations include endoscopy of the upper gastrointestinal tract and barium meal. Treatment depends on the severity: minimal blood loss may involve proton pump inhibitors and blood transfusions if hemoglobin is below 8.0 g/dL, while significant blood loss with shock requires immediate resuscitation with intravenous fluids and blood transfusions, often via large-bore cannulas. Emergency endoscopy is typically performed in an operating theatre, and securing the airway with a cuffed endotracheal tube is a top priority, especially in patients with disturbed consciousness. Octreotide may be used if varices are the cause. The condition is not found in stomach viruses such as norovirus or rotovirus.

Did You Know?

• Hematemesis is not found in stomach viruses such as norovirus or rotovirus.
• The source of vomited blood is usually from the upper gastrointestinal tract, above the suspensory muscle of the duodenum.
• Hematemesis must be differentiated from hemoptysis (coughing up blood) and epistaxis (nosebleed), which are more common.
• Untreated hematemesis can lead to hypovolemic shock, organ damage, or cerebral atrophy.

Defining the Condition and Separating It from Look-Alikes

Hematemesis refers to the act of vomiting blood, most commonly presenting as vomit mixed with bright red blood. While it shares a visual resemblance with coffee-ground vomiting, the two are clinically distinct because the latter does not involve that bright red appearance. A critical diagnostic challenge lies in telling hematemesis apart from hemoptysis, the expulsion of blood through coughing, and epistaxis, a nosebleed. Both of these mimics are considerably more prevalent in everyday clinical practice, and distinguishing among the three can prove genuinely difficult for a clinician at the bedside. The anatomical origin of the blood in true hematemesis is generally the upper gastrointestinal tract, with the suspensory muscle of the duodenum serving as the approximate lower boundary. Because the condition signals a potentially life-threatening internal bleed, it is always managed as a medical emergency, and any episode of visible blood in vomit demands urgent professional evaluation rather than casual observation at home.

A Remarkably Broad Range of Underlying Causes

The list of conditions capable of producing hematemesis is strikingly diverse. Peptic ulcers sit near the top, sometimes linked to the severe disease known as Zollinger-Ellison syndrome. Vascular abnormalities such as bleeding gastric or intestinal varices represent another major category, as do Mallory-Weiss tears in the esophageal lining triggered by prolonged, forceful retching. Tumors of the stomach or esophagus, erosion of the esophageal or gastric lining, and radiation poisoning also feature prominently. Infectious and parasitic causes extend from viral hemorrhagic fevers and yellow fever to hepatic and intestinal schistosomiasis caused by Schistosoma mansoni, and even strongyloidiasis. Plague, particularly its septicemic form, and chronic viral hepatitis round out the infectious picture. Iatrogenic injury from procedures like endoscopy or transesophageal echocardiography, atrio-oesophageal fistula, liver cirrhosis, Dieulafay's disease, certain medications, and gastroenteritis or gastritis all appear in the differential. Notably, common stomach viruses such as norovirus and rotovirus do not cause hematemesis.

Tracing the Source: Mechanism and Diagnostic Workup

The blood that appears in hematemesis almost always originates from the upper gastrointestinal tract, encompassing the esophagus, the stomach, and portions of the small intestine, with the suspensory muscle of the duodenum marking the general lower limit. Importantly, hematemesis tends to manifest only after a meaningful volume of blood has already been lost, meaning the visible episode often represents a later stage of an ongoing bleed. Diagnostic evaluation centers on endoscopy of the upper gastrointestinal tract, which allows direct visualization of the bleeding site. A barium meal study may serve as an additional investigative tool. A platelet count is considered an essential laboratory test in these situations. The clinical history gathered from the patient should aim to confirm that bleeding is truly present, estimate both the volume and the speed of the loss, pinpoint the likely source and specific underlying cause, and uncover any serious coexisting diseases that could worsen the prognosis. This structured approach helps clinicians identify which patients will need the most aggressive intervention.

Emergency Protocols: From Minimal Loss to Life-Threatening Hemorrhage

Hematemesis is universally treated as a medical emergency, and the single most critical question is whether blood loss has reached a level sufficient to produce shock. In milder presentations without shock, proton pump inhibitors such as omeprazole may be administered to address a suspected ulcer while awaiting endoscopy. Patients are typically kept nothing by mouth, and adequate venous access is secured with large-bore cannulas or a central venous catheter in case a further bleed destabilizes them. Transfusion is indicated when hemoglobin drops below 8.0 g/dL. In hemodynamically significant cases, resuscitation becomes the immediate priority: intravenous fluids and blood transfusions are delivered through large-bore cannulas, and emergency endoscopy is performed in an operating theatre. If the bleeding source cannot be identified endoscopically, surgical consultation and laparotomy may be required. Securing the airway with a cuffed endotracheal tube is paramount, especially in patients with altered consciousness. Octreotide may be given when variceal bleeding is suspected. Medications that lower platelet counts, such as certain antibiotics, must be avoided, as resulting thrombocytopenia can make the situation fatal.