CBNAAT Annual Maintenance Protocol

The annual maintenance protocol for the Cartridge-based Nucleic Acid Amplification Test (CBNAAT) instrument involves calibration of the machine. 

Calibration:

• Calibration of the CBNAAT instrument is performed by the manufacturer before the system is shipped.
• Calibration is not required during the initial system setup.
• The manufacturer recommends that the system should be checked for proper calibration on an annual basis (or after every 2,000 runs on each instrument module).
• Based on the usage and care of the system, calibration checks may be recommended more frequently.
• The service engineer will perform the machine check during the annual maintenance visit.

Parameters Verified During Calibration 

One calibration cartridge is used to calibrate a single module in conjunction with the calibration software.

• Recalibrate the optical system 
• Verify the thermal system 
• Module sub-system functionality: A series of system-level tests to ensure full system functionality within the instrument servicing specifications as provided by the manufacturer, and covers:

1. Heater and fan performance
2. Syringe drive and pressure performance
3. Valve drive performance
4. Ultrasonic horn performance
5. Electronic components performance

Figure: Temperature Calibration of the CBNAAT Instrument

Resources

• GeneXpert Package Insert