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Emergency And Acute Medicine – Hemorrhoid
Basics And Description
Hemorrhoids are normal venous sinusoids of the distal rectum and proximal anal canal that function as vascular cushions contributing to anal continence. These cushions consist of thick submucosa containing blood vessels, smooth muscle, and elastic connective tissue. An arteriovenous shunt system at the level of the internal hemorrhoids explains the typical presentation of bright red blood per rectum. Hemorrhoid disease develops when these normal structures become symptomatic. Hemorrhoids are generally painless unless thrombosed or strangulated. Pathologically, disease occurs when portions of the anal canal lining slide downward.
External hemorrhoids are located below the dentate line, covered by skin or anoderm, and drain into the internal iliac venous system. Internal hemorrhoids arise from submucosal vessels above the dentate line, drain into the portal venous system, and are typically found at the left lateral, right posterolateral, and right anterolateral positions. Internal hemorrhoids are classified by degree of prolapse: grade 1 causes painless bleeding without prolapse; grade 2 prolapses with bowel movements but reduces spontaneously; grade 3 prolapses with bowel movements and requires manual reduction; grade 4 is chronically prolapsed and not reducible.
Etiology
The exact cause of hemorrhoid disease is unclear. Gravitational forces and increased abdominal pressure contribute to distention of venous sinusoids. It is commonly associated with straining and irregular bowel habits, including hard, bulky stools or diarrhea, which cause tenesmus and excessive straining. These forces weaken submucosal support tissue, promoting prolapse of anal cushions. Additional contributing factors include higher resting anal pressures related to erect posture, hereditary absence of venous valves, and chronically elevated intra-abdominal pressure from conditions such as pregnancy, ascites, and portal hypertension.
Diagnosis – Signs And Symptoms
Patients most commonly present with painless rectal bleeding during or after defecation. Blood is typically bright red and may appear on toilet paper, coat the stool, or drip into the toilet bowl. Rectal discomfort or a sensation of pressure may occur. Severe pain suggests thrombosed external hemorrhoids or prolapsed internal hemorrhoids that have become strangulated. Pruritus ani is common, and anal fissures may coexist.
History
Key historical features include duration and severity of bleeding, association with pain, presence of new perianal masses, stool consistency, prior anorectal disease, changes in stool caliber, and use of anticoagulants.
Physical Examination
Examination begins with inspection of the perianal area by gently separating the buttocks. A discrete, dark blue, tender mass covered by skin is consistent with a thrombosed external hemorrhoid and may coexist with an internal component. A purplish, tender, mucosa-covered mass suggests a prolapsed and strangulated internal hemorrhoid, often accompanied by thrombosed external hemorrhoids. Asking the patient to bear down may reveal prolapse. Digital rectal examination is mandatory to exclude malignancy. Anoscopy allows direct visualization of the anal canal and identification of bleeding internal hemorrhoids.
Essential Workup
Diagnosis is primarily clinical and based on a detailed history and thorough anorectal examination.
Diagnostic Tests And Interpretation
Laboratory testing is not routinely required. A complete blood count is indicated if there is significant bleeding to assess hemoglobin and hematocrit. Platelet count and coagulation studies (PT, PTT, INR) should be obtained in patients on anticoagulation or with significant comorbid disease.
Differential Diagnosis
Rectal prolapse, anal fissure, perirectal abscess or fistula, condyloma acuminata, anorectal carcinoma, and melanoma.
Treatment – Prehospital Care
Establish intravenous access in cases of severe bleeding.
Initial Stabilization And Therapy
Apply direct digital pressure to control active bleeding when present.
Emergency Department Treatment And Procedures
Conservative therapy is the foundation of treatment for all patients. This includes warm sitz baths for 15 minutes three times daily and after bowel movements, a high-fiber diet targeting approximately 30 g/day, increased oral hydration, stool softeners, bulk-forming laxatives, and analgesia with NSAIDs or acetaminophen.
Thrombosed external hemorrhoids causing severe pain may be excised if symptoms are present for fewer than five days and the clot has not begun to resolve. The procedure is performed with the patient in the prone jackknife or left lateral decubitus position. After local anesthesia with lidocaine containing epinephrine, an elliptical incision is made to excise the clot and overlying skin. Hemostasis may require silver nitrate. A small piece of Gelfoam or gauze is applied, and the dressing is removed at the first sitz bath approximately six hours later.
Nonthrombosed prolapsed internal hemorrhoids may be manually reduced, sometimes requiring topical anesthesia or an anal sphincter block. Bleeding internal hemorrhoids may be treated with sclerotherapy using agents such as sodium morrhuate or hypertonic saline, or with rubber band ligation of one or two hemorrhoids, which should be avoided in immunocompromised patients. Nonstrangulated, nonreducible hemorrhoids are managed conservatively with surgical referral, whereas strangulated internal hemorrhoids require immediate surgical consultation.
Pregnancy-associated hemorrhoids are common in the third trimester and are managed conservatively. Certain topical agents should be avoided due to fetal risk.
Medications
Analgesics include acetaminophen with or without codeine and NSAIDs such as ibuprofen. Stool regulation is achieved with fiber supplements, psyllium, and docusate sodium. Topical therapies include lidocaine-based anorectal creams, hydrocortisone-containing preparations, and 0.2% nitroglycerin ointment applied locally to reduce sphincter spasm and pain. Caution is required with topical anesthetics due to systemic absorption.
Follow-Up And Disposition
Admission is indicated for strangulated grade 4 hemorrhoids requiring urgent surgery, severe anemia due to bleeding, or significant bleeding in patients on anticoagulation or with portal hypertension. Most patients can be discharged with outpatient management.
Issues For Referral
Surgical referral is indicated for grade 3 or 4 internal hemorrhoids, suspected malignancy, inflammatory bowel disease, coagulopathy, pregnancy, or immunocompromised status.
Follow-Up Recommendations
Patients with advanced hemorrhoids or concern for neoplasia should have colorectal surgery follow-up. Uncomplicated cases should follow up with primary care. All patients with bright red blood per rectum should be referred for gastrointestinal or colorectal evaluation to exclude malignancy.
Key Clinical Insights And Common Pitfalls
Hemorrhoids are a common but not exclusive cause of anorectal bleeding and pain. Failure to evaluate for alternative diagnoses, including malignancy, is a frequent pitfall.
Basics And Description
Hemorrhoids are normal venous sinusoids of the distal rectum and proximal anal canal that function as vascular cushions contributing to anal continence. These cushions consist of thick submucosa containing blood vessels, smooth muscle, and elastic connective tissue. An arteriovenous shunt system at the level of the internal hemorrhoids explains the typical presentation of bright red blood per rectum. Hemorrhoid disease develops when these normal structures become symptomatic. Hemorrhoids are generally painless unless thrombosed or strangulated. Pathologically, disease occurs when portions of the anal canal lining slide downward.
External hemorrhoids are located below the dentate line, covered by skin or anoderm, and drain into the internal iliac venous system. Internal hemorrhoids arise from submucosal vessels above the dentate line, drain into the portal venous system, and are typically found at the left lateral, right posterolateral, and right anterolateral positions. Internal hemorrhoids are classified by degree of prolapse: grade 1 causes painless bleeding without prolapse; grade 2 prolapses with bowel movements but reduces spontaneously; grade 3 prolapses with bowel movements and requires manual reduction; grade 4 is chronically prolapsed and not reducible.
Etiology
The exact cause of hemorrhoid disease is unclear. Gravitational forces and increased abdominal pressure contribute to distention of venous sinusoids. It is commonly associated with straining and irregular bowel habits, including hard, bulky stools or diarrhea, which cause tenesmus and excessive straining. These forces weaken submucosal support tissue, promoting prolapse of anal cushions. Additional contributing factors include higher resting anal pressures related to erect posture, hereditary absence of venous valves, and chronically elevated intra-abdominal pressure from conditions such as pregnancy, ascites, and portal hypertension.
Diagnosis – Signs And Symptoms
Patients most commonly present with painless rectal bleeding during or after defecation. Blood is typically bright red and may appear on toilet paper, coat the stool, or drip into the toilet bowl. Rectal discomfort or a sensation of pressure may occur. Severe pain suggests thrombosed external hemorrhoids or prolapsed internal hemorrhoids that have become strangulated. Pruritus ani is common, and anal fissures may coexist.
History
Key historical features include duration and severity of bleeding, association with pain, presence of new perianal masses, stool consistency, prior anorectal disease, changes in stool caliber, and use of anticoagulants.
Physical Examination
Examination begins with inspection of the perianal area by gently separating the buttocks. A discrete, dark blue, tender mass covered by skin is consistent with a thrombosed external hemorrhoid and may coexist with an internal component. A purplish, tender, mucosa-covered mass suggests a prolapsed and strangulated internal hemorrhoid, often accompanied by thrombosed external hemorrhoids. Asking the patient to bear down may reveal prolapse. Digital rectal examination is mandatory to exclude malignancy. Anoscopy allows direct visualization of the anal canal and identification of bleeding internal hemorrhoids.
Essential Workup
Diagnosis is primarily clinical and based on a detailed history and thorough anorectal examination.
Diagnostic Tests And Interpretation
Laboratory testing is not routinely required. A complete blood count is indicated if there is significant bleeding to assess hemoglobin and hematocrit. Platelet count and coagulation studies (PT, PTT, INR) should be obtained in patients on anticoagulation or with significant comorbid disease.
Differential Diagnosis
Rectal prolapse, anal fissure, perirectal abscess or fistula, condyloma acuminata, anorectal carcinoma, and melanoma.
Treatment – Prehospital Care
Establish intravenous access in cases of severe bleeding.
Initial Stabilization And Therapy
Apply direct digital pressure to control active bleeding when present.
Emergency Department Treatment And Procedures
Conservative therapy is the foundation of treatment for all patients. This includes warm sitz baths for 15 minutes three times daily and after bowel movements, a high-fiber diet targeting approximately 30 g/day, increased oral hydration, stool softeners, bulk-forming laxatives, and analgesia with NSAIDs or acetaminophen.
Thrombosed external hemorrhoids causing severe pain may be excised if symptoms are present for fewer than five days and the clot has not begun to resolve. The procedure is performed with the patient in the prone jackknife or left lateral decubitus position. After local anesthesia with lidocaine containing epinephrine, an elliptical incision is made to excise the clot and overlying skin. Hemostasis may require silver nitrate. A small piece of Gelfoam or gauze is applied, and the dressing is removed at the first sitz bath approximately six hours later.
Nonthrombosed prolapsed internal hemorrhoids may be manually reduced, sometimes requiring topical anesthesia or an anal sphincter block. Bleeding internal hemorrhoids may be treated with sclerotherapy using agents such as sodium morrhuate or hypertonic saline, or with rubber band ligation of one or two hemorrhoids, which should be avoided in immunocompromised patients. Nonstrangulated, nonreducible hemorrhoids are managed conservatively with surgical referral, whereas strangulated internal hemorrhoids require immediate surgical consultation.
Pregnancy-associated hemorrhoids are common in the third trimester and are managed conservatively. Certain topical agents should be avoided due to fetal risk.
Medications
Analgesics include acetaminophen with or without codeine and NSAIDs such as ibuprofen. Stool regulation is achieved with fiber supplements, psyllium, and docusate sodium. Topical therapies include lidocaine-based anorectal creams, hydrocortisone-containing preparations, and 0.2% nitroglycerin ointment applied locally to reduce sphincter spasm and pain. Caution is required with topical anesthetics due to systemic absorption.
Follow-Up And Disposition
Admission is indicated for strangulated grade 4 hemorrhoids requiring urgent surgery, severe anemia due to bleeding, or significant bleeding in patients on anticoagulation or with portal hypertension. Most patients can be discharged with outpatient management.
Issues For Referral
Surgical referral is indicated for grade 3 or 4 internal hemorrhoids, suspected malignancy, inflammatory bowel disease, coagulopathy, pregnancy, or immunocompromised status.
Follow-Up Recommendations
Patients with advanced hemorrhoids or concern for neoplasia should have colorectal surgery follow-up. Uncomplicated cases should follow up with primary care. All patients with bright red blood per rectum should be referred for gastrointestinal or colorectal evaluation to exclude malignancy.
Key Clinical Insights And Common Pitfalls
Hemorrhoids are a common but not exclusive cause of anorectal bleeding and pain. Failure to evaluate for alternative diagnoses, including malignancy, is a frequent pitfall.
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