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Open Fistulectomy vs. Laser Closure for Low Perianal Fistula

27 augusti 2026 uppdaterad av: Nada Mohamed Abd El Meged, Assiut University

Open Fistulectomy Versus Fistula Tract Laser Closure in Low Perianal Fistula

Perianal fistula is an abnormal tunnel connecting the anal canal to the perianal skin, frequently causing chronic pain, discharge, and impaired quality of life. Traditional open fistulectomy is an established treatment with high healing rates, but it leaves an open wound that requires prolonged recovery and carries a risk of anal sphincter injury. Fistula-tract Laser Closure (FiLaC) is a minimally invasive, sphincter-preserving technique that uses laser thermal energy to close the tract from within while minimizing tissue trauma.

This study is a prospective, randomized controlled trial designed to compare the efficacy and safety of open fistulectomy versus laser fistulotomy in adult patients with primary low perianal fistula.

Participants are randomly assigned to one of two surgical treatment groups:

  • Group 1: Laser fistulotomy (FiLaC) using a 1470 nm diode laser probe to seal the tract, combined with internal opening closure.
  • Group 2: Conventional open fistulectomy involving complete excision of the fistula tract, allowing the wound to heal by secondary intention.

Patients are evaluated during surgery and followed postoperatively at 24 hours, 48 hours, 1 week, 2 weeks, 4 weeks, 3 months, and 6 months. The primary goals are to assess fistula healing rates and postoperative pain levels. Secondary goals include evaluating operative time, intraoperative blood loss, wound healing duration, complication rates, time to return to daily activities, fecal continence (measured by the Wexner Continence Score), and quality of life.

Studieöversikt

Status

Har inte rekryterat ännu

Betingelser

Intervention / Behandling

Studietyp

Interventionell

Inskrivning (Beräknad)

40

Fas

  • Inte tillämpbar

Deltagandekriterier

Forskare letar efter personer som passar en viss beskrivning, så kallade behörighetskriterier. Några exempel på dessa kriterier är en persons allmänna hälsotillstånd eller tidigare behandlingar.

Urvalskriterier

Åldrar som är berättigade till studier

  • Vuxen
  • Äldre vuxen

Tar emot friska volontärer

Nej

Beskrivning

Inclusion Criteria:

  • Adult patients aged 18 years and above.
  • Diagnosis of primary (non-recurrent) low perianal fistula (intersphincteric or low transsphincteric involving less than one-third of the external sphincter) confirmed by clinical examination.
  • Fistula tract anatomy confirmed by preoperative endoanal ultrasound (EAUS) and/or pelvic MRI.
  • Fit for surgery under spinal or general anesthesia.
  • Willing and able to provide written informed consent.

Exclusion Criteria:

  • Complex or high perianal fistulae (suprasphincteric, extrasphincteric, or involving more than one-third of the external sphincter).
  • Recurrent or previously operated perianal fistulae.
  • Crohn's disease or other inflammatory bowel disease-associated fistulae.
  • Active anorectal sepsis or undrained abscess at the time of enrollment.
  • Immunocompromised patients (e.g., HIV/AIDS, long-term systemic corticosteroid therapy, post-organ transplantation).
  • Pre-existing fecal incontinence (baseline Wexner Continence Score > 5).
  • Pregnant or breastfeeding females.
  • Known bleeding disorders or therapeutic anticoagulation that cannot be temporarily safely discontinued.
  • History of prior pelvic irradiation.
  • Inability or unwillingness to comply with the postoperative follow-up protocol.

Studieplan

Det här avsnittet ger detaljer om studieplanen, inklusive hur studien är utformad och vad studien mäter.

Hur är studien utformad?

Designdetaljer

  • Primärt syfte: Behandling
  • Tilldelning: Randomiserad
  • Interventionsmodell: Parallellt uppdrag
  • Maskning: Ingen (Open Label)

Vapen och interventioner

Deltagargrupp / Arm
Intervention / Behandling
Experimentell: Laser Fistulotomy (FiLaC)
Patients undergo Fistula-tract Laser Closure (FiLaC™) using a 1470 nm diode laser system. The internal opening is curetted and sutured closed with polyglycolic acid suture. Granulation tissue is debrided with a fistula brush, and a radially emitting laser probe is introduced through the external opening to deliver energy circumferentially (10-14 W) at a continuous withdrawal rate of 1 mm/s to obliterate the tract. The external opening is left open or loosely sutured for drainage.
Procedur: Fistula-tract Laser Closure (FiLaC)
Debridement of the fistula tract using a fistula brush followed by closure of the internal opening with 2/0 polyglycolic acid suture. Photothermal obliteration of the tract is achieved using a 1470 nm diode laser system with a 360-degree radial emitting fiber delivering energy circumferentially (10-14 W) during steady withdrawal at 1 mm/s.
Aktiv komparator: Open Fistulectomy
Patients undergo conventional open fistulectomy. The fistula tract is cannulated with a malleable probe, followed by complete surgical excision of the tract and its epithelialized lining using electrocautery and sharp dissection. The surgical wound is left open to heal by secondary intention, with wound edge marsupialization performed as needed to prevent premature skin bridging.
Procedur: Open Fistulectomy
Complete surgical excision of the fistulous tract from the external opening to the internal opening using sharp dissection and electrocautery over a probe guide. The resulting wound is left open to heal by secondary intention with wound edge marsupialization performed as necessary.

Vad mäter studien?

Primära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Fistula Healing Rate at 6 Months
Tidsram: 6 months postoperatively
Percentage of participants achieving complete clinical fistula healing, defined as complete epithelialization of the surgical site and external wound with total absence of discharge or purulent drainage on clinical examination, without the need for secondary surgical intervention.
6 months postoperatively

Samarbetspartners och utredare

Det är här du hittar personer och organisationer som är involverade i denna studie.

Sponsor

Assiut University

Studieavstämningsdatum

Dessa datum spårar framstegen för inlämningar av studieposter och sammanfattande resultat till ClinicalTrials.gov. Studieposter och rapporterade resultat granskas av National Library of Medicine (NLM) för att säkerställa att de uppfyller specifika kvalitetskontrollstandarder innan de publiceras på den offentliga webbplatsen.

Studera stora datum

Studiestart (Beräknad)

1 oktober 2026

Primärt slutförande (Beräknad)

1 oktober 2027

Avslutad studie (Beräknad)

1 november 2027

Studieregistreringsdatum

Först inskickad

27 augusti 2026

Först inskickad som uppfyllde QC-kriterierna

27 augusti 2026

Första postat (Faktisk)

1 september 2026

Uppdateringar av studier

Senaste uppdatering publicerad (Faktisk)

1 september 2026

Senaste inskickade uppdateringen som uppfyllde QC-kriterierna

27 augusti 2026

Senast verifierad

1 augusti 2026

Mer information

Termer relaterade till denna studie

Nyckelord

Ytterligare relevanta MeSH-villkor

Andra studie-ID-nummer

  • FiLaC vs Open Fistulectomy

Läkemedels- och apparatinformation, studiedokument

Studerar en amerikansk FDA-reglerad läkemedelsprodukt

Nej

Studerar en amerikansk FDA-reglerad produktprodukt

Nej

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