The Science Journal of the American Association for Respiratory Care

2008 OPEN FORUM Abstracts

ENGINEERING CONTROLS TO ENSURE UNINTERRUPTED OSCILLATORY VENTILATION DURING A POWER FAILURE

Richard T. Nguyen1, Lee W. Evey1, Suzanne Iniguez1



Background: Twice in 2007 and once in 2008 our hospital experienced a power failure that resulted in a conversion to our back up generator, the 3 to 7 seconds that it took to transfer the power supply were enough to shut down our Sensormedics Oscillators that we had running; the ventilator had to be manually restarted by a therapist which resulted in a slight delay.

Methods: In conjunction with BioMed it was decided to add a Liebert GP1270 F2FR UPS (uninterruptable power supply) to each of our oscillators to ensure that they would not experience a shutdown with an AC power loss.

Results: For the purpose of testing, standard settings for the performance check were placed on the Sensormedics oscillator and a Liebert GP1270 F2FR with a full charge was utilized. A power test performed with loss of AC power and return to AC power was done with no interruption to the oscillator. In a separate test the UPS unit lasted 40 minutes before the yellow LED or stage 0 (the last of 5 stages) came on.

Conclusion: With the addition of a UPS device to our Sensormedics oscillator we can ensure uninterrupted oscillatory ventilation to our patients even with the loss of AC power. This additional measure provides an even greater level of safety for our patient population.