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Emergency And Acute Medicine – Rectal Trauma
Rectal trauma refers to injury of the rectal mucosa ranging from simple contusion to full-thickness laceration with extension into the peritoneum or perineum. Approximately two-thirds of the rectum is extraperitoneal, which influences management and risk of contamination. Injuries may result from penetrating, blunt, foreign body, or iatrogenic causes.
Penetrating trauma accounts for most severe injuries, with gunshot wounds responsible for approximately 80% of penetrating rectal trauma, followed by stab and impalement injuries. Blunt trauma may occur in motor vehicle collisions, hydrostatic injuries such as waterskiing accidents, or pelvic fractures where bone fragments penetrate the rectum. Rectal foreign bodies may be associated with autoerotic activity, assault, anal intercourse, or ingestion of sharp objects. Iatrogenic trauma is the most common overall cause and includes complications of barium enema, colonoscopy (particularly with polypectomy), hemorrhoidectomy, and urologic or obstetric procedures such as episiotomy. In children, rectal injury may result from thermometer insertion, and any rectal trauma in young children should raise concern for nonaccidental injury.
Patients may present with perineal, anal, or lower abdominal pain, rectal bleeding, obstipation, or signs of perforation and peritonitis such as guarding, rebound tenderness, and fever. A pelvic fracture increases suspicion for rectal injury. History should include mechanism, timing, and any anal manipulation or instrumentation. Rectal injury must be suspected in all patients with gunshot wounds, stab wounds, or impalement injuries involving the trunk, buttocks, perineum, or upper thigh.
Physical examination requires careful inspection and palpation of the buttocks, anus, and perineum. Entrance and exit wounds should be identified in penetrating trauma. Digital rectal examination assesses for gross blood or occult blood and evaluates prostate position. A high-riding prostate may indicate urethral injury. Female patients require speculum and bimanual examination, and male patients require thorough genitourinary examination.
Laboratory evaluation includes complete blood count to assess for blood loss and leukocytosis suggestive of peritonitis, type and screen if hemorrhage is suspected, and urinalysis to evaluate for genitourinary involvement. Imaging with upright and supine abdominal films and pelvic radiographs may identify pneumoperitoneum, extraperitoneal air, foreign bodies, or pelvic fractures. CT scan of the abdomen and pelvis with appropriate contrast is indicated in blunt trauma or when perforation is suspected. Retrograde urethrogram is required if urethral injury is suspected. Contrast enema with water-soluble contrast may be useful when perforation is uncertain.
Initial management follows trauma principles with airway, breathing, and circulation assessment, spinal precautions in blunt trauma, and fluid resuscitation for hypotension. Prehospital removal of rectal foreign bodies should not be attempted. In the emergency department, tetanus prophylaxis should be updated and broad-spectrum antibiotics covering gram-negative and anaerobic organisms administered when significant mucosal disruption or peritonitis is present. Foley catheter placement should be deferred until urethral injury is excluded.
Rectal foreign body removal may be attempted in the emergency department if the object is low and accessible. The patient is positioned in lithotomy, local anesthesia may be used, and gentle sphincter dilation performed. Obstetric forceps, ring forceps, biopsy forceps, or suction devices may assist extraction. Suprapubic pressure and patient Valsalva maneuver may help. A Foley catheter passed above the object with balloon inflation can relieve suction and facilitate removal. After extraction, sigmoidoscopy should be performed to evaluate for mucosal injury. Surgical consultation is required for peritonitis, full-thickness lacerations, high-riding or sharp objects, objects more than 10 cm from the anal verge, or failed extraction attempts.
Antibiotic regimens should provide gram-negative and anaerobic coverage. Options include ampicillin/sulbactam, cefotetan, cefoxitin, piperacillin/tazobactam, or combination therapy with ampicillin, gentamicin, and metronidazole. Clindamycin or metronidazole may be added for enhanced anaerobic coverage. Analgesia and sedation may include fentanyl and midazolam as needed.
Surgical intervention is indicated for perforation, torn anal sphincter, significant bleeding, high-riding or sharp foreign bodies requiring removal under general anesthesia, or hemodynamic instability. Laparotomy is reserved for severe or complicated cases.
Admission is required for perforation, significant bleeding, unstable vital signs, abdominal pain, torn sphincter, or foreign bodies requiring operative removal. Patients may be discharged if vital signs are stable, abdominal examination is benign, and sigmoidoscopy or anoscopy is normal. All discharged patients require repeat abdominal examination within 12–24 hours and strict return precautions for abdominal pain, vomiting, or fever.
A key pitfall is failure to recognize perforation after foreign body extraction. Approximately 60% of rectal foreign bodies can be removed in the emergency department. High suspicion for rectal injury is essential in patients presenting with abdominal pain after lower gastrointestinal or genitourinary procedures.
Rectal trauma refers to injury of the rectal mucosa ranging from simple contusion to full-thickness laceration with extension into the peritoneum or perineum. Approximately two-thirds of the rectum is extraperitoneal, which influences management and risk of contamination. Injuries may result from penetrating, blunt, foreign body, or iatrogenic causes.
Penetrating trauma accounts for most severe injuries, with gunshot wounds responsible for approximately 80% of penetrating rectal trauma, followed by stab and impalement injuries. Blunt trauma may occur in motor vehicle collisions, hydrostatic injuries such as waterskiing accidents, or pelvic fractures where bone fragments penetrate the rectum. Rectal foreign bodies may be associated with autoerotic activity, assault, anal intercourse, or ingestion of sharp objects. Iatrogenic trauma is the most common overall cause and includes complications of barium enema, colonoscopy (particularly with polypectomy), hemorrhoidectomy, and urologic or obstetric procedures such as episiotomy. In children, rectal injury may result from thermometer insertion, and any rectal trauma in young children should raise concern for nonaccidental injury.
Patients may present with perineal, anal, or lower abdominal pain, rectal bleeding, obstipation, or signs of perforation and peritonitis such as guarding, rebound tenderness, and fever. A pelvic fracture increases suspicion for rectal injury. History should include mechanism, timing, and any anal manipulation or instrumentation. Rectal injury must be suspected in all patients with gunshot wounds, stab wounds, or impalement injuries involving the trunk, buttocks, perineum, or upper thigh.
Physical examination requires careful inspection and palpation of the buttocks, anus, and perineum. Entrance and exit wounds should be identified in penetrating trauma. Digital rectal examination assesses for gross blood or occult blood and evaluates prostate position. A high-riding prostate may indicate urethral injury. Female patients require speculum and bimanual examination, and male patients require thorough genitourinary examination.
Laboratory evaluation includes complete blood count to assess for blood loss and leukocytosis suggestive of peritonitis, type and screen if hemorrhage is suspected, and urinalysis to evaluate for genitourinary involvement. Imaging with upright and supine abdominal films and pelvic radiographs may identify pneumoperitoneum, extraperitoneal air, foreign bodies, or pelvic fractures. CT scan of the abdomen and pelvis with appropriate contrast is indicated in blunt trauma or when perforation is suspected. Retrograde urethrogram is required if urethral injury is suspected. Contrast enema with water-soluble contrast may be useful when perforation is uncertain.
Initial management follows trauma principles with airway, breathing, and circulation assessment, spinal precautions in blunt trauma, and fluid resuscitation for hypotension. Prehospital removal of rectal foreign bodies should not be attempted. In the emergency department, tetanus prophylaxis should be updated and broad-spectrum antibiotics covering gram-negative and anaerobic organisms administered when significant mucosal disruption or peritonitis is present. Foley catheter placement should be deferred until urethral injury is excluded.
Rectal foreign body removal may be attempted in the emergency department if the object is low and accessible. The patient is positioned in lithotomy, local anesthesia may be used, and gentle sphincter dilation performed. Obstetric forceps, ring forceps, biopsy forceps, or suction devices may assist extraction. Suprapubic pressure and patient Valsalva maneuver may help. A Foley catheter passed above the object with balloon inflation can relieve suction and facilitate removal. After extraction, sigmoidoscopy should be performed to evaluate for mucosal injury. Surgical consultation is required for peritonitis, full-thickness lacerations, high-riding or sharp objects, objects more than 10 cm from the anal verge, or failed extraction attempts.
Antibiotic regimens should provide gram-negative and anaerobic coverage. Options include ampicillin/sulbactam, cefotetan, cefoxitin, piperacillin/tazobactam, or combination therapy with ampicillin, gentamicin, and metronidazole. Clindamycin or metronidazole may be added for enhanced anaerobic coverage. Analgesia and sedation may include fentanyl and midazolam as needed.
Surgical intervention is indicated for perforation, torn anal sphincter, significant bleeding, high-riding or sharp foreign bodies requiring removal under general anesthesia, or hemodynamic instability. Laparotomy is reserved for severe or complicated cases.
Admission is required for perforation, significant bleeding, unstable vital signs, abdominal pain, torn sphincter, or foreign bodies requiring operative removal. Patients may be discharged if vital signs are stable, abdominal examination is benign, and sigmoidoscopy or anoscopy is normal. All discharged patients require repeat abdominal examination within 12–24 hours and strict return precautions for abdominal pain, vomiting, or fever.
A key pitfall is failure to recognize perforation after foreign body extraction. Approximately 60% of rectal foreign bodies can be removed in the emergency department. High suspicion for rectal injury is essential in patients presenting with abdominal pain after lower gastrointestinal or genitourinary procedures.
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