Publications by authors named "Thomas Havranek"

Background: Between 32 and 34 weeks postconceptional age (PCA), premature infants typically achieve neuromuscular maturation to initiate the coordination of a nutritive suck triad. Many premature infants also require intubation, which has been associated with dysphagia in adults and infants. At our institution, despite these factors, some infants have been noted to tolerate oral feeds while on continuous positive airway pressure (CPAP).

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Lower blood glucose values are common in the healthy neonate immediately after birth as compared to older infants, children, and adults. These transiently lower glucose values improve and reach normal ranges within hours after birth. Such transitional hypoglycemia is common in the healthy newborn.

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VACTERL (vertebral anomalies, anal atresia, cardiac defect, tracheoesophageal fistula, renal anomaly, limb anomalies) is an association of anomalies with a wide spectrum of phenotypic expression. While the majority of cases are sporadic, there is evidence of an inherited component in a small number of patients as well as the potential influence of nongenetic risk factors (maternal diabetes mellitus). Presence of hydrocephalus has been reported in VACTERL patients (VACTERL-H) in the past, with some displaying branchial arch anomalies.

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CCHD affects more than 25% of neonates born with congenital heart disease. Patients with CCHD require timely intervention in the form of surgery or cardiac catheterization to survive. These interventions may improve survival and outcomes for these patients.

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Background: Neonates with gastrointestinal disorders (GDs) are at high risk for parenteral nutrition-associated liver disease (PNALD). Soybean-based intravenous lipid emulsions (S-ILE) have been associated with PNALD. This study's objective was to determine if a lower dose compared with a higher dose of S-ILE prevents cholestasis without compromising growth.

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Objective: To determine whether packed red blood cell (PRBC) transfusion affects post-prandial superior mesenteric artery blood flow velocities (SMA BFVs) in very-low birth weight (VLBW) neonates and if so, at what time point after transfusion restoration of previous SMA BFV patterns occurs.

Design/methods: VLBW pre-term neonates, older than 14 days and tolerating bolus enteral feedings administered every 3 h were enrolled in this prospective observational study. Pulsed Doppler ultrasound was used to measure pre- and post-prandial (at 45 min) time-averaged mean, peak and end diastolic velocities (TAMV, PSV, EDV) immediately before and after 15 ml/kg of PRBC transfusion was given over 3 h; patent ductus arteriosus (PDA) status was also evaluated.

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Objective: To evaluate the effects of patent ductus arteriosus (PDA) on postprandial superior mesenteric artery blood flow velocities (SMA BFV)s and feeding tolerance in extremely low birth weight (ELBW) neonates.

Methods: Appropriate for gestational age, ELBW preterm neonates, tolerating bolus enteral feedings were eligible to participate in this prospective observational study. Pulsed Doppler was used to measure preprandial and postprandial (at 30 and 60 min) time-averaged mean velocity (TAMV), peak systolic velocity (PSV) and end diastolic velocity (EDV) once during the day of life 5-7; at the same time, PDA size was estimated using the PDA: left pulmonary artery (LPA) ratio.

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Deletion of 1q43-44 has been reported in >50 cases. Phenotype-genotype correlation of this deletion has recently been described based on 20 pure cases. This led to the definition of critical regions and candidate genes for microcephaly, corpus callosum abnormalities, and seizure disorders.

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Infants who are dependent on parenteral nutrition (PN) sometimes develop PN-associated cholestasis (PNAC). A compassionate use protocol, approved by the U.S.

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Objective: To identify factors related to the postnatal increase in superior mesenteric artery blood flow velocity (SMA BFV).

Study Design: SMA BFV was measured in 35 infants (birth weight 1047±246 g) on day of life (DOL) 1, 3, 5, 7 10 and 14. Latent curve modeling (LCM) was used to measure the longitudinal change in BFV for each subject, and the correlation between changes in BFV and baseline values.

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Background: Antenatal MgSO4 administration is used extensively as a tocolytic agent and to treat preeclampsia. Various effects on the fetus and newborn have been reported, and MgSO4 has well-documented vasoactive effects.

Objective: To determine if antenatal MgSO4 administration affects intestinal blood flow velocity in newborn preterm infants.

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Inflammation plays a key role in lung injury and in the pathogenesis of asthma. Two murine models of allergic airway inflammation-sensitization and challenge to ovalbumin (OVA) and intratracheal exposure to interleukin-13 (IL13)-were used to evaluate the expression of poly(ADP-ribose) polymerase-1 (PARP-1) in allergic airway inflammation. Inflammation is prominent in OVA-induced allergic asthma, but this inflammation is greatly reduced by a PARP-1 inhibitor and almost eliminated when PARP-1 knockout mice are subjected to the OVA model.

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Objective: To reduce feeding intolerance among very low birth weight neonates.

Study Design: A total of 10 neonates with birth weights of 750 to 1250 g were given oral-gastric boluses (2.5 ml/kg every 3 hours) of a solution patterned after amniotic fluid.

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