Even One Pancreatic Duct Cannulation Raises PEP Risk-Endoscopy Feb.25

Introduction

Post-ERCP pancreatitis (PEP) remains the most frequent and feared complication of ERCP. We all recognize that repeated pancreatic duct (PD) cannulations increase risk—but in real life, many cases involve just one inadvertent guidewire entry into the PD. Until now, the clinical significance of a single PD cannulation has been debated, and practice varies: some teams escalate prophylaxis immediately, others don’t.

This study addresses a practical question every ERCPist faces:

Is a single inadvertent PD guidewire cannulation enough to meaningfully increase PEP risk?

Problem statement

Current thinking often focuses on “multiple cannulations” as the trigger for concern. But the true intraprocedural exposure—how often the PD is entered, how deep, and where the wire goes—has been poorly captured in routine datasets.

Key uncertainties:

• Does one main PD cannulation matter?
• Does location (head vs body vs side branch) change the risk?
• Should a single PD cannulation trigger immediate prophylaxis escalation (e.g., PD stent)?

What they did (plain language)

• Prospective, multicenter study across nine centers (biliary-indication ERCPs).
• Real-time, third-party intraprocedural recording of PD wire entries (not just operator recall).
• Standard 30-day follow-up for PEP outcomes.
• Adjusted analysis accounting for other patient/procedure risk factors and prophylactic measures used.

Key findings clinicians should remember

1. A single main PD cannulation is independently linked to PEP

The key message: one inadvertent main PD cannulation is not “trivial.”

Risk increases with single cannulation and stays similarly elevated with multiple cannulations—meaning the “first hit” may account for much of the risk signal.

2. Where the wire goes matters

• Main duct cannulation into the head and body was associated with higher PEP risk.
• Side-branch only cannulations did not show a clear association.

3. Clinical implication: prophylaxis should be triggered earlier

Because one main PD cannulation already confers meaningful risk, this study supports a proactive stance:

• If you inadvertently cannulate the main PD, treat it as a significant event—not a near-miss.

Practical “what should I do tomorrow?”

When to escalate prophylaxis (based on this study’s signal)

• Any inadvertent main PD wire cannulation (even once), especially if it tracks into the head/body

→ strongly consider PD stent + standard prophylaxis bundle per your protocol.

When risk may be lower (but still use judgment)

• Side-branch-only cannulation without main duct entry

→ may not carry the same risk signal, but consider the full clinical context.

Conclusion

This real-time multicenter dataset suggests that PEP risk starts with the first inadvertent main PD cannulation, and that the classic “multiple cannulations” framework may underestimate risk from a single wire entry. These findings support early use of preventive interventions—particularly PD stenting—when the main pancreatic duct is inadvertently cannulated.