Clinical Scorecard: Long-term effectiveness of a bioactive matrix combined with autologous platelet concentrate in managing complex anal fistulae

At a Glance

Key Highlights

• CAF surgical treatment is challenging with high recurrence and risk of continence disturbances, especially in women and anterior fistulae
• Minimally invasive techniques aim to preserve sphincter function but have variable success rates (12.5%–88%) and limited long-term data
• Regenerative fistula treatment (RFT) with Obsidian RFT® matrix offers a simple, anatomy-preserving approach promoting tissue regeneration with potential for improved long-term outcomes

Guideline-Based Recommendations

Diagnosis

• Perform endoanal ultrasound and/or MRI to classify fistula anatomy according to Park’s classification
• Define fistulae as complex if high/middle transsphincteric, suprasphincteric, extrasphincteric, or rectovaginal
• In active IBD, control endoluminal disease medically before surgical intervention

Management

• Initial placement of a loose seton for 4–6 weeks to control sepsis before definitive surgery
• Remove seton and perform RFT with autologous bioactive matrix under epidural anesthesia
• Close internal fistula orifice with Z-suture prior to RFT application
• Use fistula brush and saline irrigation for tract debridement before matrix application
• Consider RFT in symptomatic patients with persistent fistula after medical control of IBD and seton placement

Monitoring & Follow-up

• Follow-up for at least 6 months post-RFT to assess clinical healing defined by absence of discharge
• Monitor for fistula persistence or recurrence via clinical examination and symptom assessment
• Evaluate continence status pre- and post-treatment to detect new or worsened incontinence

Risks

• Potential for fistula persistence or recurrence despite treatment
• Risk of continence disturbances, although RFT aims to minimize this compared to traditional surgery
• Complications related to surgical procedure and local infection

Patient & Prescribing Data

Adults with complex anal fistulae, including those with controlled IBD and prior surgical interventions

RFT with Obsidian RFT® matrix is a minimally invasive, anatomy-preserving option that may reduce recurrence and continence complications; requires prior seton placement and careful patient selection

Clinical Best Practices

• Ensure adequate control of active IBD before surgical intervention for fistula
• Use imaging modalities to accurately classify fistula anatomy and plan treatment
• Employ a staged surgical approach starting with loose seton placement to control sepsis
• Perform meticulous tract debridement and internal orifice closure before applying bioactive matrix
• Monitor patients longitudinally for healing, recurrence, and continence outcomes

References

• STROBE Statement
• Obsidian RFT® bioactive matrix information