Regulatory Compliance
The definitive resource for Sterile Processing Departments implementing ANSI/AAMI ST91:2021 visual inspection requirements. Protocols, evidence, tools, and the world's first triple-light inspection system — all in one place.
The Standard
ANSI/AAMI ST91:2021 — Flexible and semi-rigid endoscope processing in health care facilities — is the definitive American standard for endoscope reprocessing. Published by the Association for the Advancement of Medical Instrumentation (AAMI), it supersedes ST91:2015 and incorporates the latest evidence on endoscope-associated infection prevention.
Section 9.3 — Visual Inspection is the section most directly relevant to the VD-UVE. It mandates that all internal channels of flexible endoscopes be visually inspected before and after reprocessing to verify cleanliness and structural integrity. This requirement applies to every reprocessing cycle.
"Visual inspection of the internal channels of flexible endoscopes should be performed using a borescope or video borescope to verify that channels are free of debris, residue, and damage before and after each reprocessing cycle."
— ANSI/AAMI ST91:2021, Section 9.3
All U.S. healthcare facilities that reprocess flexible endoscopes, including hospitals, ASCs, and clinics.
The Joint Commission, DNV, and state health departments cite ST91 in survey findings. Non-compliance carries significant risk.
SGNA, APIC, and AORN all reference ST91:2021 as the authoritative standard for endoscope reprocessing.
The Gap
Standard white light inspection is a necessary first step, but it has a fundamental limitation: it can only detect what is visible to the naked eye. Protein residues, organic films, and early-stage bacterial biofilm are often transparent or translucent under white light — completely invisible to even the most experienced inspector.
Scientific Evidence
The VD-UVE inspection protocol is grounded in peer-reviewed clinical research. The following key studies form the scientific foundation for the triple-light approach.
Gastrointestinal Endoscopy
Residual organic material was detected in 25% of endoscope channels that passed standard white-light inspection, using ATP bioluminescence and protein assays.
American Journal of Infection Control
Biofilm was detected in 100% of endoscopes sampled after standard reprocessing, using scanning electron microscopy and culture methods.
Clinical Microbiology Reviews
Endoscope-associated outbreaks are significantly underreported; the true incidence of transmission events is estimated to be 10–100× higher than reported cases.
Technical Information Report
UV fluorescence detection at 365nm and 405nm provides superior sensitivity for organic residue and porphyrin biofilm detection compared to white light alone.
The Protocol
Use this interactive checklist to walk through a complete VD-UVE inspection. Download the PDF version for your SPD documentation binder.
Competitive Comparison
| Feature | White-Light Systems | VD-UVE |
|---|---|---|
| White light inspection | ||
| 365nm UV protein/residue detection | ||
| 405nm UV porphyrin/biofilm detection | ||
| HD image & video capture | Varies | |
| AAMI ST91 documentation package | ||
| Financing available | ||
| Dedicated medical endoscopy design | Varies | |
| Compliance consultation support |
Download the complete AAMI ST91:2021 Visual Inspection Checklist for your SPD documentation binder.
Select all statements that apply to your facility to assess your compliance risk level.