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Development of an Endoscope Reprocessor Using Ozonated Water Jets.

Maycon C O Carvalho1,2, Tatiana R O Heinzelmann3,4, Leandro L Azevedo3,4

  • 1Department of Biomedical Engineering, Anhembi Morumbi University, São José dos Campos, SP, Brazil. mayconcarvalho20@gmail.com.

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Summary
This summary is machine-generated.

A novel endoscope reprocessing system effectively disinfects scopes using ozonated water jets, achieving a 99.99% reduction in bacterial load. This method offers a faster, more resource-efficient alternative to traditional reprocessing techniques.

Keywords:
Biomedical equipmentDisinfectionEndoscopeOzoneReprocessing

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Area of Science:

  • Medical Devices
  • Microbiology
  • Water Treatment Technologies

Background:

  • Endoscope reprocessing is critical for preventing healthcare-associated infections.
  • Conventional methods can be time-consuming and resource-intensive.
  • Ozone has potent antimicrobial properties.

Purpose of the Study:

  • To develop and evaluate an innovative endoscope reprocessing system utilizing ozonated water jets.
  • To assess the system's efficacy in disinfecting endoscopes contaminated with common bacteria.
  • To determine if the system offers a more efficient alternative to current reprocessing protocols.

Main Methods:

  • A novel reprocessing system with a vertically moving jet head was designed.
  • Ozonated water was employed for both external surface disinfection and internal channel irrigation.
  • Quantitative and qualitative microbiological analyses assessed disinfection effectiveness against Staphylococcus aureus and Escherichia coli after enzymatic detergent washing.

Main Results:

  • The system demonstrated uniform disinfection across all endoscope surfaces.
  • A 4-log (99.99%) reduction in bacterial colony-forming units (CFU/mL) was achieved.
  • Qualitative analysis confirmed the absence of bacterial growth, indicated by no turbidity.

Conclusions:

  • The developed endoscope reprocessor effectively reduces bacterial load by 99.99% using ozonated water jets.
  • This system presents a potentially more resource-efficient reprocessing alternative, using only 8 liters of water per cycle.
  • The combination of mechanical water jet action and ozone's antimicrobial properties, with a 15-minute processing time, proved effective.