What Happened

Between February 28 and April 18, 2022, circulating nurse Catherine Shannon Dunton took fentanyl from nearly 450 vials at The Surgery Center at Jensen Beach, an outpatient surgery center in Jensen Beach, Florida. She extracted the fentanyl from the sterile vials for self-injection and refilled the vials with saline before returning them to stock, where they remained available for use in outpatient surgical procedures.

The substitution was discovered during the period of the scheme, and Dunton was ultimately charged federally. She pleaded guilty to tampering with a consumer product and was sentenced to 48 months in federal prison followed by three years of supervised release.

The case is notable for both the scale of the diversion — nearly 450 vials over roughly seven weeks — and the setting: a same-day surgery center where anesthesia and circulating staff have direct access to controlled substances during the surgical day.

What Went Wrong

Several control gaps likely combined to allow hundreds of vials to be compromised before detection:

  • A single clinician had unsupervised access to fentanyl vials in the perioperative setting, with no independent verification of vial integrity when drugs were drawn or returned.
  • Vials that had been opened and refilled were returned to stock without an integrity check, meaning a saline-filled vial was visually indistinguishable from an intact product.
  • No reconciliation process compared the number of vials dispensed to the number of intact vials returned, so the pattern of substitution did not surface as a count exception.
  • There was apparently no per-provider benchmarking of fentanyl usage, which would have flagged a clinician whose draw volume exceeded peers over consecutive weeks.
  • The scale of the scheme — nearly 450 vials — indicates that routine audits, if any existed, were not detecting the substitution at any point during the seven-week window.

How It Could Have Been Prevented

  • Require tamper-evident seals or integrity verification on every vial returned to stock, with any compromised vial quarantined and investigated rather than reused.
  • Reconcile dispensed versus returned vial counts at the end of every surgical day, escalating any unexplained gap to the diversion coordinator.
  • Benchmark fentanyl and other anesthesia drug usage per provider and alert when an individual's draw volume exceeds peer or historical baselines.
  • Require a second clinician to witness waste and to verify that any partially used vial is either discarded or securely stored, never returned silently to stock.
  • Apply random integrity testing of returned vials, including inspection and, where practical, assay of suspicious units, in the perioperative setting.

Related Guidance

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