________________________________________________________________Countless lives have been saved by implantable medical devices (e.g., total artificial hearts, ventricular assist devices, pacemakers, cardioverterdefibrillators, and central lines) and extracorporeal devices that flow whole human blood outside the body through indwelling catheters and external circuits, during cardiopulmonary bypass (CPB), hemodialysis, and extracorporeal membrane oxygenation (ECMO) 1,2 . However, the need to co-administer soluble anticoagulant drugs, such as heparin, with many of these procedures, significantly reduces their safety and hampers their effectiveness 3,4 . Without systemic anticoagulation, these extracorporeal and indwelling devices can rapidly occlude due to thrombosis because clots form when fibrin and platelets in the flowing blood adhere to the surfaces of these artificial materials 5 . Unfortunately, heparin causes significant morbidity and mortality including post-operative bleeding, thrombocytopenia, hypertriglyceridemia, hyperkalemia and hypersensitivity 6 , and its use is contraindicated in several patient populations 7 . In fact, the majority of drug-related deaths from adverse clinical events in the UnitedStates are due to systemic anticoagulation 8 .This need to prevent blood clotting while minimizing administration of anticoagulant drugs has led to the search for biomaterial surface coatings that can directly suppress blood clot formation. The most successful approach to date has been to chemically immobilize heparin on blood-contacting surfaces to reduce thrombosis and lower anticoagulant administration 9,10 . Although this approach has been widely adopted, major limitations persist because the surface-bound heparin leaches, resulting in a progressive loss of anticoagulation 24,25 . Importantly, the TP continues to retain the free LP as a thin mobile liquid layer even when the surface is challenged with a flowing immiscible fluid, such as blood (Fig. 1a). We refer to this unique anti-thrombogenic bilayer composed of the TP and LP coating as a Tethered-Liquid Perfluorocarbon (TLP) surface. RESULTS A generic blood repellent surface coatingTo test the anti-adhesive properties of the TLP coating method, we examined surface adhesion of fresh whole human blood on an acrylic surface sloped at an angle of 30 degrees, with or without a TLP coating composed of tethered perfluorohexane and liquid perfluorodecalin. Blood droplets immediately adhered to the control uncoated acrylic surface and left a trail of blood components over the course of 5 sec (Fig. 1b, top, Supplementary Fig. 1 and Supplementary Movie 1).In contrast, when the same surface was coated with TLP, the blood droplet almost immediately slid off the surface (< 0.3 sec), and remarkably, there was no evidence of any residual blood trail (Fig. 1b, Supplementary Fig. 1 and Supplementary Movie 2). We quantified blood adhesion to surfaces by measuring the minimum angle required to cause a droplet to slide ("sliding angle") ( Fig. 1c). Control uncoated s...

Objective To investigate the association between elective caesarean sections and neonatal respiratory morbidity and the importance of timing of elective caesarean sections.

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Background: Evaluation of sepsis accounts for one third of all nursery triage admissions. If umbilical cord blood could be accurately substituted for infant blood, it would spare infants the discomfort of an invasive procedure and save both time and resources. While awaiting 48-hour blood culture results, we decide on clinical management based on whether the white blood cell (WBC) immature to total (I:T) granulocyte ratio is ≧0.2. Objectives: Our goal was to assess the correlation of complete blood count (CBC), I:T ratio and blood culture results between umbilical cord and infant blood. Methods: We conducted a prospective cohort study comparing CBC/differential and blood culture results of paired samples of umbilical cord and infant blood from term newborns. Results: We sent 113 paired samples of cord and infant venous blood for CBC/differential and blood culture. All 113 umbilical cord and infant blood cultures were negative, yielding a false-positive blood culture rate of zero. For 92% of babies, both the cord and infant blood I:T ratio were <0.2 or both were ≧0.2. Cord and infant WBC, hematocrit and platelet counts were moderately to highly correlated. Conclusion: We conclude that cord blood can be safely substituted for infant blood in routine sepsis evaluations of asymptomatic, term infants based on both the low false-positive cord blood culture rate and the significant association between high I:T ratios in cord and infant blood.

Neonatal thromboembolism is rare and in most cases iatrogenic from indwelling central catheters, peripheral arterial lines, and umbilical lines. It often requires urgent intervention to restore perfusion and to avoid morbidity and even mortality. Very few case reports of neonatal arterial thrombosis at birth are described in the literature. We present the case of a full-term infant noted to have marked left arm swelling at birth. Doppler ultrasound of the arm demonstrated a large thrombus in the left subclavian, axillary, and brachial arteries. He underwent left arm fasciotomy and anticoagulant therapy with good recovery. We present this case with a brief review of the literature.

Mutations in SCN2A gene cause a variety of epilepsy syndromes. We report a novel SCN2A-associated epilepsy phenotype in monozygotic twins with tonic seizures soon after birth and a suppression-burst EEG pattern. We reviewed the medical records, EEG tracings, MRI, neuropathological findings, and performed whole genome sequencing (WGS) on Twin B’s DNA and Sanger sequencing (SS) on candidate gene mutations. Extensive neurometabolic evaluation and early neuroimaging studies were normal. Twin A died of an iatrogenic cause at 2 weeks of life. His neuropathologic examination was remarkable for dentato-olivary dysplasia and granule cell dispersion of the dentate gyrus. Twin B became seizure-free at 8 months and was off anti-epileptic drugs by 2 years. His brain MRI, normal at 2 months, revealed evolving brainstem and basal ganglia abnormalities at 8 and 15 months that resolved by 20 months. At 2.5 years, Twin B demonstrated significant developmental delay. Twin B’s WGS revealed a heterozygous variant c.788C>T predicted to cause p.Ala263Val change in SCN2A and confirmed to be de novo in both twins by SS. In conclusion, we have identified a de novo SCN2A mutation as the etiology for Ohtahara syndrome in monozygotic twins associated with a unique dentate-olivary dysplasia in the deceased twin.

Objective: The aim of this study is to show the efficacy of the Program to Enhance Relational and Communication Skills-Neonatal Intensive Care Unit (PERCS-NICU).Study Design: In this study, 74 practitioners attended workshops and completed baseline, post-training and follow-up questionnaires.Result: On yes/no questions, 93 to 100% reported improved preparation, communication skills and confidence post-training and follow-up. A total of 94 and 83% improved their ability to establish relationships, and 76 and 83% reported reduced anxiety post-training and follow-up, respectively. On Likert items, 59 and 64% improved preparation, 45 and 60% improved communication skills and confidence, 25 and 53% decreased anxiety and 16 and 32% improved relationships post-training and follow-up, respectively. Qualitative themes included integrating new communication and relational abilities, honoring the family perspective, appreciating interdisciplinary collaboration, personal/human connection and valuing the learning. In total, 93% applied skills learned, threequarters transformed practice and 100% recommended PERCS-NICU. Conclusion:After PERCS-NICU, clinicians improved preparation, communication and relational abilities, confidence and reduced anxiety when holding difficult neonatal conversations.

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