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Chapter 11
Diagnostics
REF 1057983 A Respironics V200 Ventilator Operator’s Manual 11-3
Diagnostic Functions Short Self Test (SST)
SST verifies the integrity of the patient circuit tubing by measuring its leak
rate and compliance. SST also tests critical hardware components, including
the safety valve, flow sensors, and autozero solenoids. Perform SST before
every patient circuit change. If SST passes, the ventilator and all attached
components are ready for use.
Equipment required to run SST:
• Patient circuit to be used on the next patient including any devices
installed in line with the circuit (such as a humidifier, O
2
sensors,
and/or temperature sensor).
• Plug or cap for the patient wye
Follow these steps to run SST:
1. Connect the circuit to be used on the next patient to the ventilator.
2. Press the SST button (Figure 11-1) on the diagnostic screen.
3. Press the Start SST button to begin the test.
4. When prompted, unplug the patient wye and press the OK button.
5. When prompted, plug the patient wye and press the OK button.
6. When SST completes successfully, press the OK button.
When SST is completed, the calculated circuit compliance is displayed on the
screen.
WARNING: Do not use a ventilator that has failed SST without verifying operational
readiness by other means. Doing so may place a patient at risk.
WARNING: Never initiate SST while the patient is connected to the ventilator. The high
airway pressures generated during SST can injure a patient.