Acute Colonic Pseudo-Obstruction (Ogilvie's Syndrome) Management (ASCRS 2016)

Algorithm Steps

1. ▶

   Start

   Suspected Ogilvie's Syndrome (ACPO)

   Colonic dilation without mechanical obstruction

   1. ●

      Action

      Clinical Presentation

      Typical features and risk factors

      • Massive abdominal distension
      • Absent or minimal pain (unless ischemia)
      • Nausea, vomiting
      • Obstipation (may still pass flatus)
      • RISK FACTORS:
      • - Post-operative (orthopedic, cardiac, spinal)
      • - Critical illness, sepsis
      • - Medications (opioids, anticholinergics)
      • - Electrolyte abnormalities
      • - Neurologic conditions
      1. ●

         Action

         Diagnostic Workup

         Exclude mechanical obstruction

         • CT abdomen/pelvis WITH contrast
         • Must rule out mechanical obstruction
         • Assess for: Transition point, mass, volvulus
         • Measure cecal diameter (critical)
         • Labs: Electrolytes (K, Mg, Ca), CBC
         • Water-soluble contrast enema if CT unclear
         1. ◆

            Decision

            Signs of Perforation/Ischemia?

            Emergency surgery if present

            • Peritonitis
            • Free air
            • Cecal pneumatosis
            • Severe localized pain
            1. ⚠

               Warning

               EMERGENCY SURGERY

               Perforation or ischemia

               • Exploratory laparotomy
               • Right hemicolectomy if ischemic cecum
               • Subtotal colectomy if extensive
               • Primary anastomosis vs ileostomy
               • Mortality 30-50% with perforation
               1. ●

                  Action

                  Post-Treatment Care

                  Prevent recurrence

                  • Advance diet slowly
                  • Continue bowel regimen
                  • Mobilize patient
                  • Monitor for recurrence (10-30%)
                  • Address underlying cause
                  • Repeat neostigmine if recurs
                  1. ✓

                     Outcome

                     Outcomes

                     Prognosis

                     • Overall mortality: 15-30%
                     • With perforation: 30-50%
                     • Recurrence: 10-30%
                     • Most respond to conservative + neostigmine
            2. ◆

               Decision

               Cecal Diameter Assessment

               Determines urgency of intervention

               • HIGH RISK: >12cm or >9cm for >3 days
               • Perforation risk increases significantly
               1. ●

                  Action

                  Conservative Management

                  For cecum <12cm, <3 days duration

                  • NPO, NG tube if vomiting
                  • IV fluids, correct electrolytes
                  • Discontinue opioids/anticholinergics
                  • Mobilize patient if possible
                  • Rectal tube (limited benefit)
                  • Knee-chest position intermittently
                  • Daily abdominal X-rays
                  • Trial for 24-48 hours
                  1. ◆

                     Decision

                     Response to Conservative Rx?

                     Reassess at 24-48 hours

                     1. ●

                        Action

                        Neostigmine Administration

                        Pharmacologic decompression

                        • DOSE: 2mg IV over 3-5 minutes
                        • MONITORING: Continuous cardiac (bradycardia risk)
                        • Atropine at bedside
                        • CONTRAINDICATIONS:
                        • - Recent MI
                        • - Bradycardia <60
                        • - Active bronchospasm
                        • - Mechanical obstruction not excluded
                        • Response expected within 30 min
                        • Can repeat once if partial response
                        1. ◆

                           Decision

                           Response to Neostigmine?

                           Assess clinical/radiographic improvement

                           • Success: 80-90%
                           • Decompression within 30 min
                           • May repeat once if partial response
                           1. ●

                              Action

                              Colonoscopic Decompression

                              If neostigmine fails or contraindicated

                              • Minimal insufflation
                              • Decompress to hepatic flexure
                              • Place decompression tube
                              • Suction as advancing
                              • Success rate: 70-80%
                              • Recurrence: 10-30%
                              • Risk: Perforation 1-3%
                              1. ◆

                                 Decision

                                 Decompression Successful?

                                 Assess need for surgery

                                 1. ●

                                    Action

                                    Surgical Intervention

                                    For refractory cases

                                    • CECOSTOMY: Percutaneous or surgical
                                    • Decompresses without resection
                                    • For poor surgical candidates
                                    • RESECTION: If ischemia/perforation
                                    • Ileostomy vs anastomosis based on status