Description

The Bowie & Dick Helix Test (BDHT) is an essential diagnostic tool designed for healthcare facilities and laboratories that rely on pre-vacuum steam sterilizers. This test ensures the effective functioning of autoclaves by verifying air removal and steam penetration, crucial for the sterilization of porous loads and hollow instruments.

Key Features

• Bowie-Dick Test: Ideal for porous loads such as surgical textiles. It uses a heat-sensitive indicator sheet that changes color uniformly when the sterilization process is effective.
• Helix Test: Tailored for hollow instruments like dental handpieces. It employs a narrow Teflon tube with an indicator strip to simulate a hollow device, confirming steam penetration through lumens.

Components

• Helix Device: Made of Teflon, simulating the structure of hollow instruments.
• Chemical Indicator Strips: Non-toxic, heavy metal-free, and compliant with ISO 11140 Type 2 standards.
• Indicator Holder and Sealing Ring: Constructed from high-temperature resistant materials.
• Packaging: Includes a natural cotton bag and a carton box for storage.

Procedure

Conducted typically at the start of each day or after sterilizer maintenance, the test involves placing the Bowie-Dick pack or Helix device in an empty sterilizer chamber. A successful test is indicated by a complete color change on the indicator, confirming proper air removal and steam penetration.

Compliance

The BDHT complies with multiple international standards, including ISO 11140 and EN 867, ensuring reliable performance. It is manufactured under ISO 13485 quality assurance procedures, with each component traceable by lot number.

Storage

Store the test components at temperatures below 25°C and humidity under 70%. Indicator strips can be archived for up to 10 years, providing long-term traceability.

Importance

While not a substitute for sterility assurance, the Bowie & Dick Helix Test is a critical operational check for autoclave performance. Recording and archiving results are recommended for compliance and traceability, ensuring that healthcare facilities maintain high sterilization standards.