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Symptoms and Signs – Differential Diagnosis of Haematochezia, sometimes known as rectal hemorrhage,
Hematochezia, the passing of bloody stools, often presents as an early indication of gastrointestinal bleeding below the ligament of Treitz. Although typically preceded by hematemesis, this symptom may also occur with a fast bleeding of 1 L or more from the upper gastrointestinal tract.
The spectrum of hematochezia includes both solid, blood-streaked feces and liquid, bloody stools that might be deep crimson, dark mahogany, or maroon in hue. Typically, this indication manifests suddenly and is preceded by stomach pain.
While hematochezia is often linked to gastrointestinal complications, it can also arise from a coagulation abnormality, exposure to chemicals, or specific diagnostic procedures. Always an important indication, hematochezia can trigger potentially fatal hypovolemia.
Urgent medical interventions
If the patient presents with grave hematochezia, assess his vital signs. Upon observing indications of shock, such as low blood pressure and rapid heart rate, arrange the patient in a supine posture and raise his feet by 20 to 30 degrees. Make necessary arrangements to provide oxygen therapy and initiate a large-bore intravenous line for immediate fluid replenishment. The next step is to collect a blood sample for typing and crossmatching, measuring the hemoglobin level and hematocrit. Introduce a nasogastric tube. Administering iced lavage may be recommended to manage bleeding. Urgent endoscopy may be required to identify the origin of the bleeding.
Historical Background and Physical Assessment
If hematochezia is not immediately life-threatening, get the patient to provide a detailed account of the quantity, hue, and texture of his bloody feces. (If feasible, personally examine and describe the stools as well.) For how long have the stools exhibited hematochezia? Do their appearances generally remain consistent, or does the quantity of blood appear to fluctuate? Enquire about any related indications and manifestations.
Proceed to examine the patient's medical history, with particular attention to gastrointestinal and coagulation status.

Pathologies. Request information regarding the use of gastrointestinal irritants, including alcohol, aspirin, and other nonsteroidal anti-inflammatory medications (NSAIDs).
Initiate the physical survey by assessing for orthostatic hypotension, a first indication of shock. Measure the patient's blood pressure and pulse in supine, seated, and standing positions. Should the systolic pressure drop by 10 mm Hg or more or the pulse rate rise by 10 beats/minute or more upon changing position, it is advisable to consider the possibility of volume depletion and an imminent shock.
Assess the skin for the presence of petechiae or spider angiomas. Evaluate the abdomen by palpating for any signs of tenderness, pain, or lumps. Furthermore, observe lymphadenopathy. Finally, a digital rectal examination is necessary to exclude the presence of rectal tumors or hemorrhoids.
Medical etiology
Anal fissure. Minor hematochezia is a defining feature of anal fissure; blood may streak the feces or be seen on toilet tissue. Hematochezia is accompanied by intense rectal pain, which can lead to constipation by leading the patient to be reluctant to defecate.

Angiodysplastic lesions
Typically seen in older individuals, these arteriovenous lesions of the ascending colon often result in persistent, vivid red rectal bleeding. On rare occasions, this painless hematochezia can lead to potentially fatal blood loss and symptoms of shock, such as rapid heart rate and low arterial pressure.

Coagulation disorders
Individuals diagnosed with a coagulation condition, such as thrombocytopenia and disseminated intravascular coagulation, may have gastrointestinal bleeding characterized by mild to severe hematochezia. Bleeding can also manifest in other bodies systems, resulting in symptoms such as epistaxis and purpura. The associated findings differ depending on the particular coagulation problem.

Colitis
Especially in older people, ischemic colitis often results in bloody diarrhea. Haematochezia can manifest as either mild or significant and is often accompanied by intense, cramping lower abdomen discomfort and low blood pressure. Additional symptoms include gastric pain, distension, and lack of intestinal noises. Profound colitis can lead to potentially fatal hypovolemic shock and peritonitis.
In general, ulcerative colitis is characterized by the presence of bloody diarrhea that may also include mucus. Hematochezia is preceded by a range of abdominal pains, from mild to severe, and can result in very little to significant blood loss. Compound manifestations include pyrexia, anorexia, emesis, dyspepsia, tachycardia, and, on rare occasions, atrial fibrillation. Weight loss and weakness manifest in the later stages.

Colorectal carcinoma
Conspicuous crimson rectal bleeding, with or without pain, is a diagnostic indicator, particularly in cases of left colon cancer.
In most cases, a left colon tumor presents with initial indications of blockage, including rectal pressure, hemorrhage, and sporadic feelings of fullness or cramping. As the condition advances, the patient also has constipation, diarrhea characterized by ribbon-shaped feces, and chronic pain, which is usually alleviated by the passage of stools or flatus. The stool is visibly hematochezic.
Neoplasm development in the right colon at an early stage can result in melena, abdominal pain, pressure, and dull cramps. With advancing disease, the patient experiences a decline in physical strength and persistent tiredness. Further symptoms he may encounter include diarrhea, anorexia, weight loss, anemia, vomiting, an abdominal mass, and indications of blockage, such as abdominal distension and irregular bowel sounds.


Colorectal polyps.
Intermittent hematochezia in individuals under the age of 60 is mostly caused by colorectal polyps, although in certain cases these lesions may provide no symptoms. Polyps positioned high in the colon can result in the presence of blood-streaked feces. The feces exhibit a positive reaction when subjected to guaiac testing. Should the polyps be situated in greater proximity to the rectum, they may exhibit unrestricted bleeding.

Diverticulitis
In the elderly, diverticulitis often presents as a rapid onset of mild to severe rectal bleeding following the patient's urge to defecate. The bleeding may cease suddenly or may advance to life-threatening hemorrhage accompanied by symptoms of shock. Common indications and manifestations may include pain in the lower left quadrant that is alleviated by defecation, alternating bouts of constipation and diarrhea, loss of appetite, feelings of nausea and vomiting, irritation and tenderness in the abdomen, and a swollen belly.

Dysentery
Infection with Shigella, Amoeba, and Campylobacter often results in bloody diarrhea, although it is far less prevalent with Salmonella. May also manifest as abdominal pain or cramps, tenesmus, fever, and nausea.

Ruptured esophageal varices
For esophageal varices, a potentially fatal condition, hematochezia can vary from little rectal leakage to visibly bloody feces and may be followed by moderate to severe hematemesis or melena. Although painless, this substantial bleeding can trigger symptoms of shock, including rapid heart rate and low blood pressure. Indeed, symptoms of shock sometimes occur before obvious indications of bleeding. Most commonly, the patient has a documented medical record of persistent liver illness.

Foodborne illness caused by Staphylococcalism
Ingestion of food toxins may result in the patient experiencing bloody diarrhea within a timeframe of 1 to 6 hours. Common manifestations include intense, cramping stomach pain; nausea and vomiting; and prostration, all of which persist for a few hours.

Haemorrhoids
Hematochezia can concomitantly occur with external hemorrhoids, which usually lead to painful feces and consequent constipation. Less painful internal hemorrhoids often result in increased intermittent bleeding during bowel movements, which can ultimately cause symptoms of anemia, such as tiredness and exhaustion.

Bacterial leptospirosis
Hematochezia or melena, together with additional bleeding symptoms including epistaxis and hemoptysis, characterizes the severe type of leptospirosis known as Weil's syndrome. An abrupt frontal headache and intense thigh and lumbar myalgia, sometimes accompanied by cutaneous hyperesthesia, usually precede the bleeding. Presence of conjunctival suffusion is suggestive. The occurrence of bleeding is thereafter accompanied by chills, a swiftly increasing fever, and potentially, nausea and vomiting. The symptoms of fever, headache, and myalgia often worsen and continue for several weeks. Additional findings may encompass discomfort in the right upper quadrant, hepatomegaly, and jaundice.

Peptic ulcer
Embolism of the upper gastrointestinal tract is a frequent complication of peptic ulcer. The patient may exhibit hematochezia, hematemesis, or melena, contingent upon the speed and volume of hemorrhage. Should the peptic ulcer infiltrate an artery or vein, the occurrence of extensive bleeding might trigger indications of shock, including low blood pressure and rapid heart rate. Other symptoms may include chills, fever, nausea and vomiting, and indications of dehydration, such as parched mucous membranes, diminished skin elasticity, and excessive thirst. The patient commonly presents with a clinical background of epigastric pain that is alleviated by dietary intake or antacids. Additionally, there is a documented record of chronic tobacco, alcohol, or NSAID use.

Ulcerative proctitis
Ulcerative proctitis usually is characterized by a strong urge to defecate, yet the patient only excretes bright red blood, pus, or mucus. Additional typical indications and manifestations include sudden onset of constipation and tenicles.

Exams. Specific surgical interventions, including colonoscopy, polypectomy, and proctosigmoidoscopy, have the potential to induce rectal bleeding. Incidence of bowel perforation minimal.
Key Factors to Consider
After placing the patient on bed rest, regularly monitor his vital signs for indications of shock, including low blood pressure, rapid heart rate, a feeble pulse, and rapid breathing. Conduct hourly monitoring of his intake and outflow. Ensure to offer emotional assistance since hematochezia can create profound fear in the patient.
Prepare the patient for hematological tests and gastrointestinal procedures, including endoscopy and

Diagnostic gastrointestinal X-rays. Conduct a visual inspection of the patient's feces and analyse them for hidden blood. Should it be required, submit a stool sample to the laboratory for parasite testing.
Therapeutic Counseling for Patients
Detail the indications and manifestations that the patient should promptly disclose. Instruct the patient on ostomy self-care and address appropriate bowel eliminating practices. Articulate dietary guidelines and limitations.
Guidelines for Pediatric Populations
The prevalence of haematochezia is substantially lower in children compared to adults. The condition may arise due to structural abnormalities, including intussusception and Meckel’s diverticulum, as well as inflammatory illnesses, such peptic ulcer disease and ulcerative colitis.
In pediatric patients, ulcerative colitis usually manifests as chronic, rather than acute, manifestations and may also result in delayed growth and maturation associated with malnutrition. Incidents of rectal bleeding in children are always indicative of suspected sexual abuse.
Guidelines for Geriatrics
Given the heightened susceptibility of elderly individuals to colon cancer, it is advisable to assess hematochezia by colonoscopy once perirectal lesions have been eliminated as the contributing factor to bleeding.









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