A preliminary evaluation of a reusable digital sterilization indicator prototype.

Area of Science:

• Medical Devices
• Infection Control
• Sterilization Monitoring

Background:

• Sterilization of medical instruments is critical for patient safety, requiring robust monitoring processes.
• Traditional chemical and biological indicators provide essential but sometimes limited information on sterilizer performance.
• Independent digital parametric indicators offer continuous, real-time data, enhancing sterilization cycle monitoring.

Purpose of the Study:

• To evaluate the performance and durability of a prototype independent digital indicator/data logger (DS1922F) for autoclave use.
• To assess the device's suitability for multiple sterilization cycles and identify potential failure points for design improvement.

Main Methods:

• Three batches of the DS1922F prototype (150 samples each) were subjected to sequential autoclave sterilization cycles.
• The first two batches underwent 300 cycles each to identify failures and refine the prototype design.
• The final batch was challenged with 600 cycles, with Kaplan-Meier survival analysis used to assess durability.

Main Results:

• Iterative testing and design modifications based on failure analysis significantly improved prototype performance.
• The final batch of DS1922F prototypes demonstrated a mean lifetime survival of 498 sterilization cycles in an autoclave.

Conclusions:

• The DS1922F prototype data logger proved robust, successfully withstanding over 600 autoclave cycles.
• Its mean operational lifetime significantly exceeds standard requirements, indicating high durability and reliability.
• Digital data loggers like the DS1922F offer a pragmatic and immediate solution for sterilization monitoring, especially where traditional services are limited.