The Science Journal of the American Association for Respiratory Care

2001 OPEN FORUM Abstracts

THEEFFECT OF RESTERILIZATION METHOD ON BIRD PARTNER PROBES

Michael Tracy RRT , TimothyMyers BS, RRT, Robert Chatburn RRT, FAARC Rainbow Babies and Children?s Hospital,Cleveland, Ohio

BACKGROUND:Waveform analysis and pulmonary mechanics are an integral part in current ventilatormanagement. Many ventilators obtain signals for graphics or mechanics throughflow sensors. Reliability and accuracy of sensors make a significant impacton decision-making. Flow sensors are single-patient use only, or reusable afterresterilization. Our institution utilizes the Bird VIP and their reusable, flowsensor technology in our Pediatric & Neonatal Intensive Care Units. Perthe manufacturer, volume accuracy for the Partner probes are ± 10% for neonatalprobes and ± 15% for peds probes. The manufacturer recommends that resterilizationcan be performed either by ethylene oxide (ETO) or by quaternary ammonium compounds(cold) sterilization. The purpose of this study was to compare the observedaccuracy and performance characteristics of Bird Partner® Infantand Pediatric Flow/Volume Sensors brand new and after resterilization by ETOand cold sterilization.

Methods: NewPartner neonatal & pediatric sensors were evaluated for accuracy of tidalvolume (Vt) delivery using calibrated syringes. Neonatal flow sensors were testedat Vt of 10, 20, 30, 40 and 50 cc. Pediatric sensors were tested at Vt of 50,200, 400, 700 and 1000 cc. Five sensors were tested new out of the package foreach sterilization method, and each sensor was evaluated five times at eachcalibrated Vt. Data were then analyzed as a percentage of error against calibratedvolumes both new condition and after each of 5 resterilizations. Error was calculatedas the difference (measured value ? true value) expressed as a percentage ofthe true value. Mean and standard deviation was calculated for errors acrossall volumes. Error intervals were calculated as mean error ± 2.31xSD (Resp Care1996; 41:1092-1099) and interpreted as the expected error for 95% of futuremeasurements at the 99% confidence level.

Results: Eachcategory in the table below encompasses 125 volume measurements. Data beloware lower (L) and upper (U) error limits expressed as % of true value:

Sterilizations
NeonatalVolumesNew1st2nd3rd4th5th
L UL UL UL UL UL U
Gas -10.49.7 -19.6 14.0-17.015.4 -18.017.2 -15.116.6-15.1 15.9
Cold -7.6 8.2-11.74.7-16.4 4.5-16.66.3-17.7 6.9 -18.0 10.4
Sterilizations
PediatricVolumesNew1st2nd3rd4th5th
L UL UL UL UL UL U
Gas -2.3 4.9-5.33.0-3.9 2.1-4.5 1.1 -6.4 3.3-4.7 2.6
Cold -4.64.1 -4.8 3.8-4.1 4.1 -4.9 5.3-5.0 5.2-4.34.1

 

CONCLUSION: Inthis benchtest, Bird neonatal and pediatric sensors were within the manufacturer'sstated accuracy new. Neonatal sensors fell outside the manufacturer?s statedaccuracy with subsequent resterilazation by either method. Pediatric sensorswere within manufacturer's stated accuracy for up to five resterilazations byeither method.

OF-01-125

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