Maternal bleeding complications following early versus delayed umbilical cord clamping in multiple pregnancies.

BACKGROUND: In 2015, the American Academy of Pediatrics recommended delayed umbilical cord clamping for at least 30-60 s for all infants. However, there is limited data regarding the maternal safety of delayed cord clamping in multiple pregnancies. We aimed to compare the maternal bleeding complications following early cord clamping (ECC) versus of delayed cord clamping (DCC) in multiple pregnancies. METHODS: A retrospective cohort study of pregnant women with multiples who delivered live-born infants at Sharp Healthcare Hospitals in San Diego, CA, USA during January 1st, 2016 - September 30th, 2017. Bleeding complications of 295 women who underwent ECC (less than 30 s) were compared with 154 women who underwent DCC (more than 30 s). ECC or DCC was performed according to individual obstetrician discretion. RESULTS: Four hundred forty-nine women with multiple pregnancies (N = 910 infants) were included in the study. 252 (85.4%) women underwent cesarean section in ECC group vs. 99 (64.3%) in DCC group. 58 (19.7%) women delivered monochorionic twins in ECC group vs. 32 (20.8%) women in DCC group. There was no increase in maternal estimate blood loss when DCC was performed comparing to ECC. There were no differences in operative time, post-delivery decrease in hematocrits, rates of postpartum hemorrhage, bleeding complications, maternal blood transfusions and therapeutic hysterectomy between the two groups. CONCLUSIONS: No differences in maternal bleeding complications were found with DCC in multiple pregnancies compared to ECC. Delayed cord clamping can be done safely in multiple pregnancies without any increased maternal risk.

Incidence of Hypocapnia, Hypercapnia, and Acidosis and the Associated Risk of Adverse Events in Preterm Neonates.

BACKGROUND: Permissive hypercapnia is a lung-protection strategy. We sought to review our current clinical practice for the range of permissive hypercapnia and identify the relationship between PaCO2 and pH and adverse outcomes. METHODS: A secondary analysis of a delayed cord-clamping clinical trial was performed on all arterial blood gas tests in the first 72 h in infants < 32 weeks gestational age. All arterial blood gas values were categorized into a clinical range to determine the percent likelihood of occurring in the total sample. The univariate and multivariate relationships of severe adverse events and the time-weighted PaCO2 , fluctuation of PaCO2 , maximal and minimal PaCO2 , base excess, and pH were assessed. RESULTS: 147 infants with birthweight of 1,206 ± 395 g and gestational age of 28 ± 2 weeks were included. Of the 1,316 total samples, < 2% had hypocapnia (PaCO2 <30 mm Hg), 47% were normocapnic (PaCO2 35-45 mm Hg), 26.5% had mild hypercapnia (PaCO2 45-55 mm Hg), 13% had moderate hypercapnia (PaCO2 55-65 mm Hg), and 6.5% had severe hypercapnia (PaCO2 ≥ 65 mm Hg). There were no adverse events associated with hypocapnia. Subjects with death/severe intraventricular hemorrhage had a higher mean PaCO2 of 52.3 versus 44.7 (odds ratio [OR] 1.16, 95% CI 1.04-1.29, P = .006), higher variability of PaCO2 with a standard deviation of 12.6 versus 7.8 (OR 1.15, 95% CI 1.03-1.27, P = .01), and a lower minimum pH of 7.03 versus 7.23 (OR 0, 95% CI 0-0.06, P = .003). There was no significant difference in any variables in subjects who developed other adverse events. CONCLUSION: The routine targeting of higher than normal PaCO2 goals may lead to a low incidence of hypocapnia and associated adverse events. Hypercapnia is common, and moderate hypercapnia may increase the risk of neurologic injury and provide little pulmonary benefit.