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Colorectal SurgeryManagement

Perianal Abscess and Fistula Management (ASCRS)

Perianal Abscess and Fistula Management (ASCRS): Perianal Pain/Swelling → Abscess Present? → Incision & Drainage → Fistula Classification → Fistulotomy.

Interactive Decision Tree

Mini Map

Algorithm Steps

  1. ▶
    Start

    Perianal Pain/Swelling

    1. ◆
      Decision

      Abscess Present?

      • Fluctuance, erythema, fever
      1. ●
        Action

        Incision & Drainage

        Bedside or OR based on location/size

        • Perianal: bedside OK
        • Ischiorectal/horseshoe: OR
        1. ◆
          Decision

          Fistula Classification

          • Simple (superficial, low trans)
          • Complex (high, multiple, Crohn's)
          1. ■
            End

            Fistulotomy

            Low fistula, adequate sphincter

          2. ■
            End

            Seton or LIFT/Advancement Flap

            Sphincter preservation

          3. ■
            End

            Seton + Medical Therapy

            Anti-TNF, drain, definitive later

      2. ●
        Action

        Fistula Evaluation

        MRI pelvis if complex, EUA

Guideline Source

ASCRS Clinical Practice Guidelines: Perianal Abscess and Fistula-in-Ano

DOI: 10.1097/DCR.0000000000001883View Guideline

Clinical Safety Information

Clinical Decision Support — Not a Substitute for Clinical Judgment

Individual patient factors may require deviation from these recommendations.

Known Limitations

  • Crohn's disease changes management
  • Complex fistulas require specialized care
  • Incontinence risk with fistulotomy

Applicable Regions

USAUUKEU

UK: ACPGBI guidelines similar

US: ASCRS guidelines

Version 1Next review: 2028-01-01

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Frequently Asked Questions

What is the Perianal Abscess and Fistula Management (ASCRS)?

The Perianal Abscess and Fistula Management (ASCRS) is a management clinical algorithm for Colorectal Surgery. It provides a structured decision tree to guide clinical decision-making, based on ASCRS Clinical Practice Guidelines: Perianal Abscess and Fistula-in-Ano.

What guideline is the Perianal Abscess and Fistula Management (ASCRS) based on?

This algorithm is based on ASCRS Clinical Practice Guidelines: Perianal Abscess and Fistula-in-Ano (DOI: 10.1097/DCR.0000000000001883).

What are the limitations of the Perianal Abscess and Fistula Management (ASCRS)?

Known limitations include: Crohn's disease changes management; Complex fistulas require specialized care; Incontinence risk with fistulotomy. Individual patient factors may require deviation from these recommendations.

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