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on behalf of the Canadian Neonatal Network Investigators abstract BACKGROUND: Overuse of antibiotics can facilitate antibiotic resistance and is associated with adverse neonatal outcomes. We studied the association between duration of antibiotic therapy and short-term outcomes of very low birth weight (VLBW) (,1500 g) infants without cultureproven sepsis.

This document reflects emerging clinical and scientific advances on the date issued, and is subject to change. The information should not be construed as dictating an exclusive course of treatment or procedure to be followed. Local institutions can dictate amendments to these opinions. They should be well documented if modified at the local level. None of these contents may be reproduced in any form without prior written permission of the SOGC. AbstractObjective: To provide guidelines for the use of antenatal magnesium sulphate (MgSO 4 ) for fetal neuroprotection of the preterm infant .Options: Antenatal MgSO 4 administration should be considered for fetal neuroprotection when women present at ≤ 31+6 weeks with imminent preterm birth, defined as a high likelihood of birth because of active labour with cervical dilatation ≥ 4 cm, with or without preterm pre-labour rupture of membranes, and/or planned preterm birth for fetal or maternal indications .There are no other known fetal neuroprotective agents .Outcomes: The outcomes measured are the incidence of cerebral palsy (CP) and neonatal death . Values: The quality of evidence was rated using the criteria described in the Report of the Canadian Task Force on Preventive Health Care (Table 1) .Benefits, harms, and costs: Antenatal magnesium sulphate for fetal neuroprotection reduces the risk of "death or CP" (RR 0 .85; 95% CI 0 .74 to 0 .98; 4 trials, 4446 infants), "death or moderatesevere CP" (RR 0 .85; 95% CI 0 .73 to 0 .99; 3 trials, 4250 infants), "any CP" (RR 0 .71; 95% CI 0 .55 to 0 .91; 4, trials, 4446 infants), "moderate-to-severe CP" (RR 0 .60; 95% CI 0 .43 to 0 .84; 3 trials, 4250 infants), and "substantial gross motor dysfunction" (inability to walk without assistance) (RR 0 .60; 95% CI 0 .43 to 0 .83; 3 trials, 4287 women) at 2 years of age . Results were consistent between trials and across the meta-analyses . There is no anticipated significant increase in health care-related costs, because women eligible to receive antenatal MgSO 4 will be judged to have imminent preterm birth .

Children with CDM with prolonged ventilation experienced 25% mortality in the first year. The use of a specific time period of ventilation to decide on withdrawal of therapy must be reconsidered given these findings. Prolonged ventilation was followed by greater morbidity and developmental delay than children with shorter ventilation duration.

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Prophylactic indomethacin was associated with increased odds of SIP independently from early feeding in this cohort; however, early enteral feeding was not associated with SIP. Marked variation in the use of prophylactic indomethacin was identified.