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Cleaning and Maintenance procedure for Non-Breakable Orthopaedic Drill Bit
- NBODB®
Disinfection and cleaning : - The drill bits should be disinfected and cleaned before
and immediately after use before any tissue residues have time to dry. Observe ISO 15883-2:2009 in washer disinfectors.
The cleaning solution must be prepared
according to the manufacturer’s instructions.
Manual cleaning : - Use a suitable brush for cleaning. Remove blood and other
residues with a soft brush and a neutral or alkaline cleaning agent. Never use a
metal brush or sponge for manual cleaning.
- Pay particular attention to the flutes, narrow channels and other areas
that are not readily accessible.
- Final rinsing with deionised water is recommended.
Mechanical cleaning / Ultrasonic bath : - Drill bits must be mounted on instrument
supports in sieve tray or a basket suitable for cleaning. Arrange the drill bits in such
a manner that water / hot disinfectant solution can flow through the cannulated narrow
channels. Check for any visible contamination of the narrow channel; if necessary
repeat the cleaning cycle or perform manual cleaning.
- Standardised automated mechanical cleaning is preferable to manual
cleaning. Observe the installation and user manual of the machine
manufacturer. Always use the cleaning agents recommended by the
manufacturer of the cleaning equipment. Prepare the chemical disinfectant
solutions according to the manufacturer’s instructions.
- The chemical agent must be diluted with pure water. Observe the
manufacturer's instructions concerning the addition of cleaning agents, concentrations and contact time.
- The temperature of the cleaning solutions in the ultrasonic bath must be
between 40°C and 45°C. Cleaning becomes ineffective when the temperature
falls below 40°C. There is a risk of protein denaturration, if the temperature exceeds 45°C.
- A very high degree of contamination has an adverse effect on the cleaning
result.
- The disinfectant solutions must be replaced at regular intervals according to
the manufacturer's instructions. In practical terms, ultrasonic treatment
periods of 3 minutes at frequencies of at least 35 KHz seem to be sufficient.
- After disinfection, the drill bits must be rinsed with clear, running water.
- Final rinse with d-ionized water will avoid the occurrence of water marks.
- Drill bits must be sufficiently dried immediately after completion of the
cleaning and rinsing steps.
Contamination : - Sterilization processes validated and controlled in accordance with
the requirements of ISO 11135-1:2007 are not assumed to be effective in inactivating
the causative agents of spongiform encephalopathy such as Creutzfeld Jacob
disease (vCJD).
- In the event of assumed or actual contamination of the drill bits with vCJD, increasing the sterilization time of a particular sterilization cycle by more than
30 minutes can damage the drill bit. Consequently, do not re-use the
vCJD-contaminated drill bit and dispose of it properly.
Specific recommendations have been produced in particular countries for the
processing of materials potentially contaminated with vCJD.
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