Abstract
Objective Spontaneous intestinal perforation (SIP) occurs commonly in extremely low gestational
age newborns (ELGANs; <30 weeks' GA). Early, concurrent neonatal use of indomethacin
(Neo_IN) and hydrocortisone (Neo_HC) is a known risk for SIP. Mothers in premature
labor often receive indomethacin (Mat_IN) for tocolysis and steroids (Mat_S) for fetal
maturation. Coincidentally, ELGANs may receive Neo_IN or Neo_HC within the first week
of life. There are limited data on the effect of combined exposures to maternal and
neonatal medications. We hypothesized that proximity exposure to these medications
may increase the risk of SIP.
Study Design We reviewed the medical records of ELGANs from June 2014 to December 2019 at a single
level III neonatal intensive care unit. We compared antenatal and postnatal indomethacin
and steroid use between neonates with and without SIP. For analysis, chi-square, Student's
t-test, Fisher's exact test, and Mann–Whitney U tests were used.
Results Among 417 ELGANs, SIP was diagnosed in 23, predominantly in neonates < 26 weeks'
GA (n = 21/126, 16.7%). Risk factors analysis focused on this GA cohort in which SIP was
most prevalent. Mat_IN administration within 2 days of delivery increased SIP risk
(odds ratio: 3; 95% confidence interval: 1.25–7.94; p = 0.036). Neo_HC was not independently associated with SIP (p = 0.38). A higher proportion of SIP group had close temporal exposure of Mat_IN and
Neo_HC compared with the non-SIP group, though not statistically significant (14 vs.
7%, p = 0.24).
Conclusion Peripartum Mat_IN was associated with increased risk for SIP in this small study
sample. Larger studies are needed to further delineate SIP risk from the interaction
of peripartum maternal medication with early postnatal therapies and disease pathophysiology.
Key Points
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Perinatal indomethacin is associated with SIP in preterm infants born at less than
26 weeks.
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Temporal proximity of prenatal/postnatal medication exposure matters.
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Indomethacin and Hydrocortisone the risks, benefits, and timing related to SIP.
Keywords
extremely low birth weight - spontaneous intestinal perforation - indomethacin - hydrocortisone
- betamethasone - magnesium - neonate