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6.6 A RANDOMISED COMPARISON OF WIDE VERSUS NARROW SATURATION MONITOR ALARM LIMITS FOR CONTROLLING OXYGEN THERAPY IN PRETERM INFANTS
S. S. Bhushan, D. Quine, B. Stenson. Simpson Centre for Reproductive Health, Royal Infirmary of Edinburgh, Edinburgh, UK
Background: Saturation monitoring is used widely to guide oxygen therapy. The optimal target ranges are unknown. There is a general aim to minimise hyperoxia, hypoxia and variability. Chosen alarm limits may influence stability because alarm soundings prompt alterations to oxygen therapy.
Aim: To determine whether the width of the alarm limits influences the stability of oxygenation in oxygen-dependent preterm infants.
Methods: Infants born at <29 weeks’ gestation and receiving supplemental oxygen were studied between days 3 and 14. Each infant was studied for two consecutive 3-h periods allocated in random order. During one period the alarm limits were set at 80–94% and during the other at 86–94%. Saturation values were downloaded to a PC every second. For each period the percentage of time spent with saturation >94%, <86%, <80% and saturation variability (standard deviation) were calculated. Differences within babies between the two periods were analyzed by by Wilcoxon test.
Results: See table.
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Conclusions: When wider saturation alarm limits were used, babies spent less time with high saturations but no more time with low saturations. These results will facilitate improved oxygen saturation targeting.
6.7 COMPARISON OF LEFT AND RIGHT VENTRICULAR FUNCTION IN TERM AND PRETERM NEONATES USING TISSUE DOPPLER IMAGING
R. J. S. Negrine1, A. Chikermane2, J. G. C. Wright2, A. K. Ewer1. 1Birmingham Women’s Hospital, Birmingham, UK, 2Birmingham Children’s Hospital, …