Main causes of development
Sources of bleeding in the digestive tract can be associated with a wide variety of pathological processes. Three key groups of etiological factors are distinguished:
- Inflammatory and ulcerative lesions. This is the most frequent group of causes. It includes classic peptic ulcer disease, various forms of gastritis and duodenitis, erosive lesions of the gastric mucosa, as well as inflammation of the esophagus (esophagitis) and peptic ulcer of the esophagus.
- Vascular and mechanical factors. This category includes Mallory-Weiss syndrome, characterized by mucosal tears in the cardioesophageal junction area. Another extremely dangerous cause is the rupture of esophageal varices, which is a reliable marker of portal hypertension in the patient.
- Oncological diseases. Neoplasms of the stomach and duodenum can cause massive blood loss at the stage of tumor mass disintegration or due to arrosion (destruction) of blood vessels feeding the tumor.
Clinical presentation and analysis of vomitus
The leading and most striking clinical manifestations are bloody vomit (haematemesis) and the appearance of black, tarry stools, known as melena. The appearance of vomitus is of paramount diagnostic importance, as it directly depends on the volume of blood lost and the duration of its stay in the aggressive environment of the stomach.
- «Coffee-ground» vomit. Appears as a dark brown mass with inclusions of undigested food and blood clots. It forms during moderate bleeding when blood contacts gastric juice for a prolonged period. The mechanism of color change is purely chemical: hemoglobin reacts with hydrochloric acid, resulting in the formation of hydrochloric acid hematin, which has a characteristic brown color.
- Vomit of unchanged bright red blood. Indicates massive, profuse bleeding, often associated with damage to a large arterial or venous trunk. In this case, blood simply does not have time to react with gastric juice due to excessively rapid evacuation.
Features of anamnesis taking
During the subjective examination of the patient, it is critically important to thoroughly ascertain the history of their life (Anamnesis vitae) and disease (Anamnesis morbi).
First of all, the alimentary factor is assessed. The physician must find out whether dietary habits are disrupted (this is a key risk factor), what the portion sizes are, how thoroughly food is chewed, and whether there is a preference for fatty, fried, spicy, salty, or flour-based foods. Bad habits (smoking, alcohol), occupational hazards, and the level of psycho-emotional stress are also taken into account.
When taking the medical history, it is important to determine the onset of symptoms—it can be acute (e.g., after a severe dietary indiscretion) or chronic, with long periods of remission and exacerbations. Rapid progression of clinical deterioration is always a warning sign for gastric cancer. It is mandatory to clarify the medication history, especially the relationship between symptoms and the use of nonsteroidal anti-inflammatory drugs (NSAIDs), as well as a family history of ulcers or tumors.
Physical examination
The physical examination provides important clues regarding the severity and cause of the condition. General inspection draws attention to the patient's constitution: pronounced weight loss down to cachexia may indicate malignancy. Pallor of the skin indicates anemia, which often accompanies atrophic gastritis, cancer, or the bleeding itself. Coated tongue is frequently found in the oral cavity.
Abdominal palpation is divided into two stages:
- Superficial palpation: allows identification of local tenderness in the epigastric region and determination of muscle guarding of the anterior abdominal wall (defanse), which is typical for an ulcer or gastritis exacerbation.
- Deep sliding palpation: in acute pathology, its informativeness is severely limited. Only occasionally is it possible to palpate the pylorus, gastric curvatures, or a large tumor.
Instrumental diagnostics
To accurately verify the source of the problem, two main methods are used:
X-ray examination. Performed strictly on an empty stomach in the upright position using a barium sulfate contrast suspension. Priority is given to fluoroscopy because it allows real-time assessment of the organ's motor function (motility). The physician evaluates the mucosal relief (abrupt cessation of folds is a pathological sign). A direct sign of peptic ulcer disease is the "niche" sign (persistent projection of the shadow beyond the stomach contour), and the most important sign of a neoplasm is the "filling defect" sign (an area that does not fill with the contrast agent).
Fibroesophagogastroduodenoscopy (FEGDS). This is the most modern, informative, and rapid method utilizing fiber optics. FEGDS is indicated for pain and any suspected upper gastrointestinal bleeding. It allows not only visual assessment of the condition of the gastric and duodenal mucosa, but also biopsy execution for subsequent morphological verification of the diagnosis.
Briefly: answers to topical questions
What is melena, and how soon after the onset of bleeding does it appear?
Melena is tarry, black stool, which is the main clinical manifestation and direct sign of internal bleeding from the upper gastrointestinal tract. The characteristic dark color of the stool is due to the fact that the shed blood enters a chemical reaction with gastric juice, resulting in the oxidation of hemoglobin by hydrochloric acid. The provided sources do not contain information on the exact time after the onset of gastrointestinal bleeding when a patient begins to pass melena.
Which laboratory parameters change in the first hours and days after massive gastrointestinal bleeding?
The provided materials do not contain exact data on which laboratory parameters change and how in the first hours and days following massive gastrointestinal bleeding. It is noted that to diagnose occult bleeding, fecal occult blood testing and a complete blood count are used; when assessing anemia, hemoglobin and hematocrit are examined, and red blood cells, white blood cells, and platelets may also be evaluated.
How are gastrointestinal bleedings classified by activity according to the Forrest endoscopic classification?
According to the Forrest endoscopic classification, bleeding gastroduodenal ulcers are classified by activity and risk of recurrence as follows:
- Active ongoing bleeding (Forrest Ia, Ib) — requires mandatory endoscopic hemostasis using a flexible endoscope.
- Stopped bleeding with a high risk of recurrence (Forrest IIa, IIb) — endoscopic prevention of recurrence is indicated.
- Stopped bleeding with a low risk of recurrence (Forrest IIc, III) — endoscopic prevention is not recommended; priority is given to medical prevention of recurrence.
Class and exam questions
What is the "filling defect" sign and what does it indicate?
This is an X-ray sign where a specific area of the stomach does not fill with contrast (barium). It is a crucial sign of the presence of a neoplasm (tumor).
Why is special attention paid to NSAID intake during anamnesis taking?
Nonsteroidal anti-inflammatory drugs have a pronounced ulcerogenic effect, meaning they can provoke the formation of mucosal erosions and ulcers, which are frequently complicated by bleeding.
What else to study on this topic
- Mechanisms of portal hypertension and esophageal varices development
- Pathogenesis of Mallory-Weiss syndrome
- Morphological verification: basics of biopsy during FEGDS
- Differential diagnosis of peptic ulcer disease and gastric cancer
- The radiological "niche" sign in detail
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