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Acute Complicated Diverticulitis - Surgical Management (WSES 2020)

Acute Complicated Diverticulitis - Surgical Management (WSES 2020): Acute Left-Sided Colonic Diverticulitis → CT Staging - Modified Hinchey Classificati...

Pathway Overview

18 steps

Algorithm Steps

18 total

  1. 01Start

    Acute Left-Sided Colonic Diverticulitis

    LLQ pain, fever, leukocytosis. CT confirms diverticulitis. Now assess for complications requiring surgical consideration.

  2. 02Action

    CT Staging - Modified Hinchey Classification

    Stage 0: Uncomplicated - thickened wall, pericolic fat stranding. Stage Ia: Confined pericolic inflammation ± phlegmon. Stage Ib: Pericolic or mesocolic abscess. Stage II: Pelvic, distant intra-abdominal, or retroperitoneal abscess. Stage III: Purulent peritonitis (no visible perforation). Stage IV: Feculent peritonitis (visible perforation, fecal material).

  3. 03Decision

    Stage Classification?

    Determines management pathway: Stage 0-Ia: Medical. Stage Ib-II: Abscess management. Stage III-IV: Surgical emergency.

  4. 04Action

    Stage 0-Ia: Uncomplicated

    Medical management: 1) Outpatient if low-risk (minimal tenderness, tolerating PO, no comorbidities). 2) Antibiotics 7-10 days (can omit for very mild cases per recent evidence). 3) Clear liquid → advance diet. 4) Follow-up in 2-4 weeks. 5) Colonoscopy 6-8 weeks after resolution.

  5. 05Outcome

    Recovery

    Source controlled. Continue recovery. Plan stoma reversal if applicable (3-6 months). Long-term: High-fiber diet, colonoscopy surveillance.

  6. 06Warning

    ⚠️ High-Risk Populations

    Immunocompromised patients (steroids, chemotherapy, transplant) have: Higher perforation rates, atypical presentations, higher mortality. Lower threshold for surgery. Primary anastomosis generally avoided.

  7. 07Action

    Stage Ib-II: Abscess Present

    Abscess identified on CT. Size determines approach.

  8. 08Decision

    Abscess Size?

    <3cm: Usually resolves with antibiotics alone. 3-5cm: Consider percutaneous drainage. >5cm: Percutaneous drainage recommended.

  9. 09Action

    Small Abscess (<3-4cm)

    IV antibiotics. NPO or clear liquids. Close monitoring - serial exams, repeat CT if worsening. Most resolve with antibiotics alone. If no improvement in 48-72h, reassess for drainage.

  10. 10Action

    Postoperative Care

    IV antibiotics (5-7 days total). Diet advancement as tolerated. Stoma education if applicable. DVT prophylaxis. Monitor for complications: Leak, abscess, ileus, wound infection. Plan: Colonoscopy to rule out malignancy after recovery.

  11. Path rejoins step 05Shared downstream outcome
  12. 11Action

    Large Abscess (>3-4cm): Drain

    CT-guided percutaneous drainage. Continue IV antibiotics. Leave drain until output minimal and patient improving. Success rate ~80%. Failure → surgery. After resolution: Plan elective sigmoid resection (controversial - may observe if first episode).

  13. Path rejoins step 10Shared downstream outcome
  14. 12Action

    Stage III-IV: Peritonitis

    Generalized peritonitis = surgical emergency. Distinguish: Stage III (purulent) vs Stage IV (feculent). Both require OR but approach may differ.

  15. 13Decision

    Patient Hemodynamically Stable?

    Assess: MAP >65, responding to fluids, no vasopressors, mentating, lactate trending down. Stability affects operative options.

  16. 14Decision

    Stable Patient: Surgical Options

    Consider: Contamination severity, patient factors, surgeon expertise, potential for primary anastomosis.

  17. 15Action

    Hartmann's Procedure

    Sigmoid resection, end colostomy, rectal stump closure. Traditional standard. Best for: Unstable patients, severe contamination, poor tissue quality, immunocompromised, uncertain viability, limited expertise for anastomosis. Reversal rate: 40-60% (often permanent).

  18. Path rejoins step 10Shared downstream outcome
  19. 16Action

    Resection + Primary Anastomosis ± Ileostomy

    Sigmoid resection with colorectal anastomosis. Consider protecting loop ileostomy. Candidates: Stable patient, Hinchey III (not IV), good tissue quality, experienced surgeon. Benefits: No permanent stoma, single hospitalization for reversal. May be comparable outcomes to Hartmann's in selected patients.

  20. Path rejoins step 10Shared downstream outcome
  21. 17Action

    Laparoscopic Lavage (Controversial)

    FOR: Hinchey III (purulent) only. NOT for: Hinchey IV, visible perforation, fecal contamination. Procedure: Laparoscopic washout (6L+ saline), drain placement, NO resection. Role uncertain - higher failure rate vs resection in trials (SCANDIV, LADIES). May be option in selected cases with experienced surgeon.

  22. Path rejoins step 10Shared downstream outcome
  23. 18Action

    Unstable: Damage Control

    Hemodynamically unstable = abbreviated surgery. Resect perforated segment, washout, end colostomy (Hartmann's), leave abdomen open if ACS risk. ICU resuscitation. No primary anastomosis in unstable patient.

  24. Path rejoins step 10Shared downstream outcome

Guideline Source

WSES 2020 Update Guidelines for Acute Colonic Diverticulitis

DOI: 10.1186/s13017-020-00313-4View Guideline

Clinical Safety Information

Clinical Decision Support — Not a Substitute for Clinical Judgment

Individual patient factors may require deviation from these recommendations.

Known Limitations

  • Laparoscopic lavage role still debated - evidence evolving
  • Primary anastomosis in emergent setting depends on patient factors and surgeon experience
  • Hinchey classification has multiple modifications - use consistently
  • Right-sided diverticulitis differs from left-sided
  • Immunocompromised patients may present atypically

Applicable Regions

USEUGlobal

Global: WSES 2020 guidelines widely adopted

Version 1Next review: 2028-01-01

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Frequently Asked Questions

What is the Acute Complicated Diverticulitis - Surgical Management (WSES 2020)?

The Acute Complicated Diverticulitis - Surgical Management (WSES 2020) is a emergency clinical algorithm for General Surgery. It provides a structured decision tree to guide clinical decision-making, based on WSES 2020 Update Guidelines for Acute Colonic Diverticulitis.

What guideline is the Acute Complicated Diverticulitis - Surgical Management (WSES 2020) based on?

This algorithm is based on WSES 2020 Update Guidelines for Acute Colonic Diverticulitis (DOI: 10.1186/s13017-020-00313-4).

What are the limitations of the Acute Complicated Diverticulitis - Surgical Management (WSES 2020)?

Known limitations include: Laparoscopic lavage role still debated - evidence evolving; Primary anastomosis in emergent setting depends on patient factors and surgeon experience; Hinchey classification has multiple modifications - use consistently; Right-sided diverticulitis differs from left-sided; Immunocompromised patients may present atypically. Individual patient factors may require deviation from these recommendations.

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