Treatment Approach for Large Bowel Obstruction

Initial Management

• The World Journal of Emergency Surgery recommends beginning with supportive care including intravenous crystalloid fluid resuscitation, nasogastric tube decompression, and insertion of a Foley catheter to monitor urine output in patients with large bowel obstruction 3
• Multidetector computed tomography (CT) with intravenous contrast is the imaging modality of choice to determine the cause, location, and complications of the obstruction in patients with large bowel obstruction 4
• Monitoring for signs of ischemia or perforation through clinical assessment, laboratory values, and imaging findings is crucial in patients with large bowel obstruction 5

Cause-Specific Treatment Approaches

• For sigmoid volvulus without ischemia or perforation, the World Journal of Emergency Surgery recommends endoscopic detorsion followed by same-admission sigmoid colectomy with primary anastomosis 1
• Endoscopic detorsion alone should be reserved only for high-surgical-risk patients with sigmoid volvulus, though recurrence rates are high 4
• Immediate surgical intervention is necessary for ischemic volvulus or failed derotation in patients with sigmoid volvulus 1
• For cecal volvulus, the World Journal of Emergency Surgery recommends right hemicolectomy as the only option 6
• Resection with primary anastomosis is the preferred approach after successful conservative management for diverticular disease, regardless of bowel preparation status 2
• For high-risk patients with diverticular disease, conservative therapy or Hartmann procedure may be considered 2
• Self-expanding metallic stents as a bridge to elective surgery offers better short-term outcomes than emergency surgery for left-sided colonic cancer causing obstruction 4
• Resection with primary anastomosis is recommended for patients without significant risk factors or perforation due to malignant obstruction 2
• For high-risk patients or those with perforation due to malignant obstruction, a staged procedure such as Hartmann procedure may be necessary 2
• For extraperitoneal rectal cancer, postponing primary tumor resection and creating a diverting stoma allows for proper staging and appropriate neoadjuvant treatment 6
• Laparoscopic approach should be limited to selected cases in specialized centers for malignant large bowel obstruction 6

Special Considerations

• Anastomotic leak rates in emergency surgery for malignant large bowel obstruction range from 2.2-12%, comparable to the 2-8% rate after elective procedures 2
• Stents are becoming increasingly important in managing malignant large bowel obstruction, converting emergency operations to elective cases with decreased complications and stoma formation 5
• Laparoscopic approach for sigmoid volvulus has limitations due to the absence of fixation and excessive length of the sigmoid colon 7

Monitoring and Follow-up

• Closely monitoring patients for clinical deterioration, such as peritonism, increasing white blood cell count, and rising lactate, is essential in patients with large bowel obstruction 5
• Immediate surgery is necessary if signs of clinical deterioration develop in patients with large bowel obstruction 4
• Regular reassessment is essential to determine if surgical intervention becomes necessary for patients managed conservatively 5