Bowel Obstruction — Management Pathway

Step-by-step decision

Choose step by step as prompted; reaching an endpoint gives the management recommendation. You can go back a step or restart anytime.

🎓 Want to practice? Do a case challenge with this pathway → (get a case, choose management step by step, scored).

Full pathway

1. [Decision] Strangulation/perforation?
   Any signs of strangulation/ischemia or peritonitis? (Mechanical bowel obstruction (abdominal pain, distension, vomiting, obstipation; imaging shows dilated loops and air-fluid levels). Red flags for strangulation/ischemia: peritoneal signs, persistent severe pain, fever, tachycardia, raised WBC/lactate, CT showing a closed loop/reduced bowel-wall enhancement/pneumatosis/portal venous gas; hemodynamic instability; complete or closed-loop obstruction, perforation.)
   • Strangulation/perforation/peritonitis/unstable → Emergency surgery
   • None, suitable for conservative care → Non-operative management
2. [End] Non-operative management
   No strangulation signs, hemodynamically stable: gastrointestinal decompression (nasogastric tube), IV fluids and electrolyte correction, analgesia, close monitoring; water-soluble contrast (gastrografin) is both diagnostic and therapeutic (contrast reaching the colon within 24 h predicts resolution). NOM for up to 72 h; if unresolved or worsening → surgery. Large bowel obstruction, suspected tumor/hernia/volvulus usually needs surgery or targeted treatment (sigmoid volvulus can be reduced endoscopically).
3. [End] Emergency surgery
   Strangulation/ischemia, perforation, peritonitis, closed loop or hemodynamic instability: emergency surgical exploration + resection of necrotic bowel; preoperative resuscitation (fluids, correct acidosis, broad-spectrum antibiotics), gastrointestinal decompression. Do not delay with conservative care to the point of bowel necrosis.

Source guidelines & references

• WSES Bologna evidence-based guideline on adhesive small bowel obstruction (ASBO)

This pathway is our own synthesis of the decision logic in the guidelines above (not the guideline verbatim); thresholds and workflows change as guidelines update — in practice follow the latest guideline, your institution's protocol and the individual patient.

Other pathways