Complications In Preterm Infants Research Articles

Postoperative Complications after Major Abdominal Surgery in Preterm Infants: A Single Institute Record

Backgrounds: Post-operative complications in pediatric surgery are important issues, especially that after major abdominal surgery for preterm infants: complications sometimes lead to mortality/morbidity even though the surgical procedures were successful. We here attempted to demonstrate and record post-operative complications in preterm infants after major abdominal surgery. This is a secondary analysis of our cohort (n = 594) previously reported regarding pediatric postoperative complications (not confined to preterm infants). Methods: Of 594 patients, 25 preterm (born Results: The mean weight was 2.43 ± 0.75 kg. Of 25, nine suffered postoperative complications: postoperative respiratory failure (n = 4), pulmonary sepsis (n = 2), and the followings were observed in one patient: intra-operative cardiac arrest, wound sepsis, septicemia, and multi-organ sepsis. There was no in-hospital mortality. Conclusion: In preterm infants undergoing major abdominal surgery, the most common postoperative complication was respiratory; respiratory failure and pulmonary sepsis. This data is roughly the same as that observed in the previous studies, which made us reconfirm the importance of the vigilance on respiratory complications in this population.

Single nucleotide vitamin D receptor polymorphisms (FokI, BsmI, ApaI, and TaqI) in the pathogenesis of prematurity complications

The vitamin D receptor (VDR), coded by the VDR gene, plays a pivotal role in executing cellular functions when bound by the active form of vitamin D. Gene polymorphisms in this receptor have been increasingly associated with a heightened state of vulnerability to certain diseases. However, limited data is available concerning the role of VDR gene polymorphisms in preterm infant complications. In 114 premature infants (< 32 weeks gestation) we analyze four single nucleotide VDR polymorphisms (rs2228570 (FokI), rs1544410 (BsmI), rs797532 (ApaI), rs731236 (TaqI)) for their association with respiratory distress syndrome (RDS), intraventricular hemorrhage (IVH), bronchopulmonary dysplasia (BPD), necrotizing enterocolitis (NEC) and retinopathy of prematurity (ROP). The results show that BPD was almost four times more likely in infants with the genotype CC of ApaI (rs7975232) (OR 3.845; p = 0.038). While both BPD and NEC were 2.1 times more likely to occur in preterm infants with the allele C of ApaI (rs7975232) (respectively: OR 2.111 and OR 2.129, p < 0.05). The ApaI VDR polymorphism appears to influence incidence of BPD and NEC in preterm infants. Considering VDR polymorphisms in future genetic investigations, in preterm complications, may prove clinically relevant.

ERK1/2 Signaling Pathway Activated by EGF Promotes Proliferation, Transdifferentiation, and Migration of Cultured Primary Newborn Rat Lung Fibroblasts.

Background Bronchopulmonary dysplasia (BPD) is a common and serious complication in premature infants. Lung fibroblasts (LFs) are present in the extracellular matrix and participate in pulmonary development in response to BPD. The aim of this study was to investigate the effect of extracellular signal-regulated kinase (ERK) on LFs cultured from newborn rats. Material and Methods. Primary LFs were isolated and treated with epidermal growth factor (EGF, 20 ng/mL) in the presence or absence of an ERK inhibitor, PD98059 (10 μmol/L). Phosphorylated ERK1/2 (p-ERK1/2) protein levels were determined using immunocytochemistry, western blotting, and real-time reverse transcription quantitative (RT–q)PCR. LF proliferation was examined by flow cytometry and a cell counting kit-8 assay. LF transdifferentiation was examined by protein and mRNA expression of α-smooth muscle actin (α-SMA) by immunocytochemistry, western blotting, and RT–qPCR. LF migration was examined by the transwell method. Results Phosphorylated ERK1/2, which was activated by EGF, promoted LF proliferation by accelerating cell-cycle progression from the G1 to S phase. After treatment with PD98059, the expression of p-ERK1/2 in LFs, cellular proliferation, and the percentage of cells in S phase were significantly decreased. Phosphorylated ERK1/2 also promoted the differentiation of LFs into myofibroblasts through increased α-SMA synthesis and migration. Conclusion The activation of ERK promotes proliferation, transdifferentiation, and migration of lung fibroblasts from newborn rats.

Cost analysis of neonates after prenatal corticosteroid prophylaxis of Respiratory Distress Syndrome

Preterm birth is a vital global health-economic problem. Health disorders provoked by it generate a high neonatal mortality rate. Prenatal corticosteroid prevention aims to reduce postnatal complications in premature infants. This survey covered two basic baby groups: work group of 89 premature infants that had been subjected to prenatal corticosteroid prophylaxis and a control group of 78 premature babies without prenatal prevention. The analysis of the pharmacoeconomic aspects of prenatal corticosteroid prevention enabled the comparison of clinical and therapeutic results, treatment costs, therapeutic expenditures, shortterm therapeutic effect, benefits and sequences from premature infants’ therapy. The analysis of clinical data obtained during this survey enabled the conclusion that when analyzing the combined effect of Dexamethasone prophylaxis, gestation week at birth and the age of the mother of premature infants with RDS, respiratory obstuction occurrence was mediated by the earlier gestation week at birth, older mother’s age and, at this background, it was restricted to a certain extent by prenatal corticosteroid administration. Conclusions: Prenatal corticosteroids cause reduction of premature infants’ treatment costs. The implementation of a smaller number of dexamethasone applications leads to smaller expenditures for premature infants’ treatment and care compared to those that have more dexamethasone applications.

Pathological staging of chorioamnionitis contributes to complications in preterm infants

ObjectiveTo investigate the effect of pathological staging of chorioamnionitis (CA) on complications in preterm infants;MethodsA single-center, retrospective study was conducted to choose singleton preterm infants (gestational age < 37 weeks) from the Department of Obstetrics and Gynecology in our hospital from December 2016 to December 2017. The basic data and placental pathological results were retrospectively collected. According to the placental pathological results of whether inflammation infiltrating amnion, CA 0/I phase was classified into non-amnionitis group, CA II/III phase was classified into amnionitis group, the incidence of common complications in preterm infants was compared. Further, logistic regression was used to analyze the effects of amnionitis on complications after being adjusted to gestational age, birth weight and thrombocytopenia.ResultsA total of 221 preterm infants were enrolled, including 186 cases in non-amnionitis group and 35 cases in amnionitis group. The gestational age of amnionitis group (32.00 ± 2.71 weeks) was significantly lower than non-amnionitis group (34.14 ± 2.06 weeks), birth weight (1.93 ± 0.64 kg) was significantly lower than that of non-amnionitis group (2.26 ± 0.58 kg), and the hospital stay in amnionitis group was significantly longer (25.71 ± 19.23 days), all of the difference above was statistically significant(P < 0.05). The incidence of intraventricular hemorrhage (IVH) in amnionitis group (37.14%) was significantly higher than that in non-amnionitis group (13.98%) (P = 0.002), and the risk of IVH was significantly increased by amnionitis (OR = 3.636, 95%CI: 1.632–8.102); after correction of gestational age, birth weight and thrombocytopenia, the risk of IVH was still significantly increased (OR = 2.471, P = 0.046, 95% CI: 1.015–6.015). And the late-onset IVH was more common (P = 0.009).ConclusionAmnionitis leads to a significant reduction in gestational age and birth weight in preterm infants, and it is an independent risk factor for IVH.

Preterm intraventricular hemorrhage in vitro: modeling the cytopathology of the ventricular zone

BackgroundSevere intraventricular hemorrhage (IVH) is one of the most devastating neurological complications in preterm infants, with the majority suffering long-term neurological morbidity and up to 50% developing post-hemorrhagic hydrocephalus (PHH). Despite the importance of this disease, its cytopathological mechanisms are not well known. An in vitro model of IVH is required to investigate the effects of blood and its components on the developing ventricular zone (VZ) and its stem cell niche. To address this need, we developed a protocol from our accepted in vitro model to mimic the cytopathological conditions of IVH in the preterm infant.MethodsMaturing neuroepithelial cells from the VZ were harvested from the entire lateral ventricles of wild type C57BL/6 mice at 1–4 days of age and expanded in proliferation media for 3–5 days. At confluence, cells were re-plated onto 24-well plates in differentiation media to generate ependymal cells (EC). At approximately 3–5 days, which corresponded to the onset of EC differentiation based on the appearance of multiciliated cells, phosphate-buffered saline for controls or syngeneic whole blood for IVH was added to the EC surface. The cells were examined for the expression of EC markers of differentiation and maturation to qualitatively and quantitatively assess the effect of blood exposure on VZ transition from neuroepithelial cells to EC.DiscussionThis protocol will allow investigators to test cytopathological mechanisms contributing to the pathology of IVH with high temporal resolution and query the impact of injury to the maturation of the VZ. This technique recapitulates features of normal maturation of the VZ in vitro, offering the capacity to investigate the developmental features of VZ biogenesis.

Maternal body mass index in early pregnancy and severe asphyxia-related complications in preterm infants.

BackgroundLittle is known about the associations between maternal body mass index (BMI) and asphyxia-related morbidity in preterm infants (<37 weeks). We aimed to investigate associations between maternal BMI in early pregnancy and severe asphyxia-related neonatal complications in preterm infants (<37 weeks) and to examine whether possible associations were mediated by overweight- or obesity-related complications.MethodsIn this Swedish population-based cohort of 62 499 singleton non-malformed preterm infants born from 1997 to 2011, risks of low Apgar scores (0–3) at 5 and 10 minutes, neonatal seizures and intraventricular haemorrhage (IVH) were estimated through two analytical approaches. In the conventional approach, the denominator for risk was all live births at a given gestational age. In the fetuses-at-risk (FAR) approach, the denominator for risk was ongoing pregnancies at a given gestational age.ResultsUsing the conventional approach, adjusted risk ratios per 10-unit BMI increase were 1.32 [95% confidence interval (CI) 1.13–1.54] and 1.37 (95% CI 1.12–1.67) for low Apgar scores at 5 and 10 minutes, respectively; 1.28 (95% CI 1.00–1.65) for neonatal seizures; and 1.18 (95% CI 1.01–1.37) for IVH. Using the FAR approach, corresponding risks were higher. These associations varied by gestational age (<32 and 32–36 weeks). Associations between maternal BMI and asphyxia-related outcomes were partly mediated through lower gestational age.ConclusionsIncreasing maternal BMI in early pregnancy is associated with increased risks of severe asphyxia-related complications in preterm infants. Our findings add to the evidence to support interventions to reduce obesity in woman of reproductive age.

Autophagy inducer activates Nrf2-ARE pathway to attenuate aberrant alveolarization in neonatal rats with bronchopulmonary dysplasia

AimsBronchopulmonary dysplasia (BPD) is a severe respiratory complication in preterm infants. This study reveals the molecular mechanism of autophagic agonists regulating the Nrf2-ARE pathway via p62 to improve alveolar development in BPD rats. Main methodsNewborn Sprague-Dawley rats were randomly exposed to a hyperoxic environment (FiO2 = 0.85) for 14 days and rapamycin (RAPA) was intraperitoneally injected on alternate days into hyperoxia-exposed mice. Alveolar development was assessed using HE and RAC values. Markers associated with the p62-Keap1-Nrf2-ARE pathway were detected by western blot, immunohistochemistry, and RT-PCR. Co-localization of proteins was determined using double immunofluorescence staining. Key findingsAt the levels of lung tissue and primary type II alveolar epithelial cells, the enhanced binding between phosphorylated p62 and Keap1 disrupted the nuclear transport of Nrf2. The activated Nrf2 was insufficient to reverse alveolar simplification. The autophagy agonist was able to inhibit p62 phosphorylation, promote Keap1 degradation, increase Nrf2 nuclear transport, augment downstream antioxidant enzyme expression, and enhance antioxidant capacity, thereby improving the simplification of alveolar structure in BPD rats. SignificanceThe use of autophagy agonists to enhance the Nrf2-ARE pathway activity and promote alveolar development could be a novel target in antioxidant therapy for BPD.

Effect of enteral erythropoietin on feeding-related complications in preterm newborns: A pilot randomized controlled study

Background and study aimsTo evaluate the effects of enteral administration of recombinant human erythropoietin (rhEPO) on feeding-related complications in preterm infants. Patients and methodsThis double-blind, randomized controlled pilot study enrolled 120 preterm infants born ≤ 32 weeks’ gestation who were admitted to the neonatal intensive care unit in a tertiary hospital; 60 patients randomly received recombinant human erythropoietin while the other 60 received placebo. Newborns who underwent cardiopulmonary resuscitation, infants with genetic syndromes, infants with inborn errors of metabolism, infants with major congenital or acquired gastrointestinal tract malformations, infants with previous use of parenteral growth factors such as recombinant human erythropoietin and granulocyte-macrophage colony-stimuating factor (GM-CSF) and infants previously treated with intravenous immunoglobulin were excluded. Overall, 48 patients withdrew from the study because of intravenous haematopoietic growth factor intake or death before treatment was completed. A total of 72 preterm infants remained in the study: 36 preterm infants in the erythropoietin (EPO) group, and 36 preterm infants in the placebo group. The day that enteral feeding was successfully started, the time to establishing one-half, two-thirds, and full enteral feedings (reaching at least 150 mL/kg/day), the number of episodes of feeding intolerance, the time to regain birth weight and the incidence of necrotizing enterocolitis (NEC) were recorded. ResultsBoth groups showed no significant difference in the time to achieve one-half, two-thirds, or full enteral feeding, no signs of feeding intolerance, and no cases of NEC were recorded. ConclusionEnteral erythropoietin does not appear to affect feeding intolerance or NEC incidence.

Prediction of short-term neonatal complications in preterm infants using exome-wide genetic variation and gestational age: a pilot study.

BackgroundPreterm birth is the leading cause of mortality and morbidity in young children with over a million deaths per year worldwide arising from neonatal complications (NC). NC are moderately heritable although the genetic causes are largely unknown. Therefore, we investigated the impact of accumulated genetic variation (burden) on NC in Non-Hispanic White (NHW) and Non-Hispanic Black (NHB) preterm infants.MethodsWe sequenced 182 exomes from infants with gestational ages from 26 to 31 weeks. These infants were cared for in the same time period and hospital environment. Eighty-one preterm infants did not develop NC, whereas 101 developed at least one severe complication. We measured the effect of burden at the single-gene and exome-wide levels, and derived a polygenic risk score (PRS) from the top 10 genes to predict NC.ResultsBurden across the exome was associated with NC in NHW (p=0.05) preterm infants suggesting that multiple genes influence susceptibility. In a post hoc analysis, we find that PRS alone predicts NC (AUC=0.67) and that PRS is uncorrelated with GA (; p=0.53). When PRS and GA at birth are combined, the AUC is 0.87.ConclusionOur results support the hypothesis that genetic burden influences NC in NHW preterm infants.

Maternal Risk Factors and Short Term Outcome of Prematurity: A Descriptive Study at a Secondary Care Hospital

Background: Approximately 15 million babies are born premature (before 37 weeks of gestation) and 1 million babies die due to prematurity complications every year. Less is known about risk factors of prematurity in middle and low-income countries. The prevalence of prematurity ranges from 5% - 18%. Objective: To determine the prevalence of premature births and to assess the rate of survival, along with the morbidity, among preterm newborns. Furthermore, to document our experience with different gestational age groups of preterm births; and to analyze the association among these strata and their clinical outcomes. Study Design: A descriptive study. Place and Duration of Study: The Aga Khan Maternal and Childcare Centre Hyderabad, Pakistan, from 1st January 2017 to 31st December 2018. Methodology: All pregnant women registered at the obstetric clinic before 24 weeks of gestation having at least three subsequent visits at the same clinic were included in the study. The women who were lost to follow up before completing three visits were excluded from the study. All un-booked women were also excluded from the study. Demographic profile was recorded including maternal age, parity, no of visits at the clinic, gestational age, mode of delivery, birth weight and pregnancy outcome. Newborns were subsequently followed at nursery or well-baby till discharge. Further subgroups were made for gestational age to assess the frequency of various morbidities in each group. Results: One thousand and ninety-one (1091) women were included in the study period that fulfilled the inclusion criteria. Two pregnancies were terminated before 24 weeks due to major congenital malformations. The prevalence of prematurity was recorded as 13.4% (146/1089). Perinatal mortality rate (no of stillbirths plus the number of early neonatal death/1000 live birth) was 17 (15.6/1000 live births) out of them, 12 were still births and 5 were early neonatal death. Out of the total preterm babies born, 59.5% (87/146) were admitted to the nursery. In the study group (2%/3146) were extreme preterm, while 7.5% were severe preterm (11/146). Moderate preterm was 11.6% (17/146) and the majority were late preterm accounting for 78.7% (115/146). Though the incidence of birth asphyxia were noted more in late preterm babies i.e. 10 as the number of these babies are also high in our study but the overall percentage was low (8.7%) as compared with the babies of extreme prematurity (100%) and moderate late prematurity (23.5%) respectively. In pregnancy outcome, 12 were still births in which six (50%) were in the late preterm group. Total of 17 newborns suffered from birth asphyxia in which ten newborns (58.8%) were in late preterm group. Overall, it was noted that the decreasing gestational age was directly correlated to morbidity and mortality. Conclusion: Among the different strata, the late preterm group has been observed to be associated with greater morbidity and mortality. Prior awareness of the morbidities associated with late preterm babies is helpful for the health care providers to anticipate and manage potential complications in preterm infants.

Effectiveness of intracavitary electrocardiogram-guided peripherally inserted central catheter tip placement in premature infants: a multicentre pre-post intervention study.

This pre-post intervention study was conducted in Neonatal Intensive Care Units in two Chinese hospitals. The objective was to evaluate the effectiveness and safety of intracavitary electrocardiogram (IC-ECG)-guided peripherally inserted central catheter (PICC) placement and tip positioning in premature infants. A total of 161 premature infants who required a PICC were enrolled and divided into two groups: pre-intervention group (n = 83) from October 2017 to July 2018 and post-intervention IC-ECG group (n = 78) from August 2018 to March 2019. Nurses were trained from May 2018 to July 2018. The reposition rate in the IC-ECG group and pre-interventions group was 3.85% and 19.28%, respectively (OR 5.970; 95% CI 1.666-21.395; p = 0.002). More infants achieved optimal tip position at the first attempt in the IC-ECG group than the pre-intervention group (93.59% vs 73.49%; OR 0.190; 95%CI 0.068-0.531; p = 0.001). The overall catheter-related complications in the pre-intervention group were 14.46% compared to 3.84% in the IC-ECG group (OR 2.962; 95%CI 1.013-8.661; p = 0.040). However, no significant differences were observed between the individual complication leakage, phlebitis and catheter-related blood stream infection.Conclusions: IC-ECG-guided peripherally inserted central catheter placement and tip positioning technology might decrease reposition rates, achieve more accurate tip positioning at the first attempt and might reduce catheter-related complications in premature infants. Further robust RCTs are needed to confirm the effectiveness of IC-ECG-guided PICC placement and tip positioning in neonates.What is Known:• Chest radiography is the gold standard for tip position confirmation of peripherally inserted central catheter placement.• Studies in adult patients have shown that electrocardiogram guidance in the placement of central venous catheters can be beneficial, while evidence in neonates is limited.What is New:• Intracavitary electrocardiogram-guided peripherally inserted central catheter placement might be superior to chest radiography in preterm infants.• Decreasing the repositioning rates and correct tip position of peripherally inserted central catheters might reduce catheter-related complications.

Less Invasive Surfactant Administration Via Tracheal Catheterization Versus Tracheal Intubation In Preterm Infants With Respiratory Distress Syndrome admitted to neonatal intensive care unit at zagazig university

Background: Respiratory distress syndrome (RDS) is a common neonatal condition in premature infants Its treatment requires the use of surfactants. This study aimed to assess the effectiveness and safety of Iess invasive surfactant administration (LISA) via tracheal catheterization compared with intubation. Methods: this was clinical trial study carried out in Zagazig University, in neonatal intensive care unit (NICU), carried on 68 patients that were divided into two groups according to the technique of surfactant administration. Results:results revealed that there was highly statistically difference between LISA and INSURE(intubation surfactant instillation extubation) group regarding CPAP and need of mechanical ventilation ;there was statistically significant difference between LISA and INSURE group regarding the possible complications as INSURE group has higher possibility for ventilator associated pneumonia , pneumothorax , Symptomatic PDA , Pulmonary hemorrhage and retinopathy of prematurity screening ,but there was no statistically significant difference between LISA and INSURE group regarding duration of O2 therapy, hospital stay and death before discharge . Conclusions: LISA technique for surfactant delivery results in a lesser need for mechanical ventilation and lesser complications in preterm infants with RDS. This method can be promising and effective step, which is feasible, cost-effective to be standardized. Key words less invasive surfactant administration, respiratory distress syndrome,clinical trial.

High Neutrophil-to-Lymphocyte Ratio Is an Early Predictor of Bronchopulmonary Dysplasia.

Background and Objective: Bronchopulmonary dysplasia (BPD) is a common complication in preterm infants; predicting the degree of BPD at an early life stage is difficult. Inflammation is a crucial risk factor for BPD pathogenesis, and the neutrophil-to-lymphocyte ratio (NLR) is a potential systemic inflammatory biomarker. We aimed to assess the predictive value of the NLR for BPD.Methods: We carried out a retrospective, single-center, observational study of neonates with gestational ages (GAs) <32 weeks and assessed the association between the NLR and BPD.Results: The study population included 296 preterm infants with BPD (n = 144) or without BPD (n = 152). Among the infants, 75 (25.3%) had mild BPD, 37 (12.5%) had moderate BPD, and 32 (10.8%) had severe BPD. The BPD group had a higher NLR at birth and at 72 h than the non-BPD group. The NLR cutoff value at 72 h for the prediction of BPD was 3.035 (sensitivity = 0.519, specificity = 0.964), and the area under the curve (AUC) was 0.714. The NLR cutoff value at 72 h for predicting severe BPD was 3.105 (sensitivity = 0.607, specificity = 0.819), with an AUC of 0.756. At the NLR cutoff value at 72 for the prediction of BPD, the AUCs were 0.640 and 0.970 in the preterm infants with EOS and congenital pneumonia, respectively.Conclusions: The NLR is an inexpensive, accessible and convenient tool; an increase in the NLR at 72 h could be an early predictor of BPD, especially severe BPD. Additionally, the NLR at 72 h could be a predictor of BPD in preterm infants with intrauterine infections.

Abdominal surgery in premature infants with patent ductus arteriosus

IntroductionPatent ductus arteriosus (PDA) is considered a risk factor for necrotising enterocolitis (NEC) and other gastrointestinal complications in preterm infants. The aim of this study is to determine whether there is a higher incidence of abdominal surgery and the associated morbidity and mortality in preterm infants who require treatment due to a significant PDA. MethodsAn observational study was conducted that included preterm infants with <37 weeks of gestational age, and a diagnosis of PDA in the last 10 years. Depending on the treatment received, the patients were divided into 3 groups: medical (A), medical and surgical (B), and no treatment (C). An analysis was performed on the pre- and peri-natal variables, as well as the incidence of gastrointestinal complications (NEC, and need for surgery for this reason), and overall mortality. ResultsThe study included a sample of 144 patients, of whom 91 were assigned to group A, 16 to B, and 37 to C. The mean gestational age by groups was 28, 26.7, and 30.1 weeks, respectively. The mean birth weight was 1083.9g, 909.3g, and 1471.2g, respectively. As regards the incidence of NEC, a total of 21, 5, and 5 cases, respectively, were found in each group, with 43%, 60% and 35%, respectively requiring abdominal surgery. Mortality by groups was 12%, 19%, and 3%, respectively. ConclusionPatients who required treatment for a significant PDA had a higher incidence of gastrointestinal complications and higher mortality than untreated patients, with no statistically significant differences being found. In the group of patients that required treatment, lower gestational age and birth weight, could explain the increase in morbidity and mortality found in these patients.

Promoting developmental supportive care in preterm infants and families in a level III neonatal intensive care unit (NICU) setting in India

Despite evidence of short- and long-term benefits of developmental care, several studies have documented nurses' lack of knowledge and skills related to developmental care concepts. This study aims to enhance neonatal nurses' abilities to acquire care practices (knowledge and skills) regarding Developmental Supportive Care (DSC).A nonrandomized before and after intervention design was adopted to improve the knowledge and skills of staff nurses in DSC practices for preterm infants in Level III B NICU. The study included 50 level III B NICU nurses (25 in interventional group, 25 in control group) located within a tertiary care hospital in India.A significant increase in the mean knowledge score was seen among participants in the intervention group (pre-test: 16.6 ± 3.1, post-test: 29.9 ± 4.1, p = 0.01) but not in the control group (pre: 16.4 ± 2.2, post: 18.6 ± 3.6, p = 0.98). The improvement in the skills of providing DSC among neonatal nurses was also higher in the intervention group (106.4 ± 7.4) relative to the control group (65.8 ± 3.6), p < 0.01, at 0.05 level of significance.The Developmental Supportive Care Program (DSCP) had a significant impact in improving the knowledge and skills of nurses in providing care and preventing complications in preterm infants.

Research progress of less invasive surfactant application in premature infants with respiratory distress syndrome

Intratracheal surfactant administration is the only specific treatment for respiratory distress syndrome and usually requires endotracheal intubation, positive pressure and/or mechanical ventilation which are harmful to the immature lung.One of these alternative methods is less invasive surfactant application (LISA) via a thin endotracheal catheter during spontaneous breathing with continuous positive airway pressure.Use of LISA allows administration of surfactant while avoiding intubation and positive pressure.Observational studies have fostered expectations of a positive effect of LISA on serious complications of preterm infants and the need for mechanical ventilation.However, there is still a controversy about indications, premedication and serious complications of preterm infants while using LISA.This article reviews the controversies of LISA technology in preterm infants with respiratory distress syndrome. Key words: Less invasive surfactant application; Respiratory distress syndrome; Pulmonary surfactant; Endotracheal intubation; Infant, premature; Mechanical ventilation; Serious complications

Long-term effects of the intratracheal administration of corticosteroids for the prevention of bronchopulmonary dysplasia: A meta-analysis.

Bronchopulmonary dysplasia (BPD) is one of the most common complications in premature infants. Since inflammation plays a crucial role in the pathogenesis of BPD, anti-inflammatory drugs, such as corticosteroids, have long been the focus of prevention research. In this meta-analysis, we aim to explore the long-term effects of the intratracheal administration of corticosteroids (IAC) in preventing BPD. EMBASE, MEDLINE, the Cochrane Library, Web of Science, CINAHL, Clinicaltrials.gov, the ISRCTN registry, and gray literature were searched to identify randomized controlled trials (RCTs) that evaluated the long-term effects of IAC for the prevention of BPD in premature infants. Five RCTs (n = 1515) were eligible for further analysis. The meta-analysis revealed that the incidence of neurodevelopmental impairment (NDI) did not significantly differ between the IAC group and the control group (relative risk [RR] 0.9, 95% confidence interval [CI] 0.79 to 1.03, P = .14). There was no significant reduction in long-term mortality (RR, 1.13; 95% CI, 0.9 to 1.41; P = .3) or the incidence of rehospitalization (RR, 0.99; 95% CI, 0.89 to 1.09, P = .82). No significant differences were observed between the IAC group and the control group with regard to height, weight and head circumference at the age of 18 to 36 months of postmenstrual age (PMA) (mean difference [MD], 0.14; 95% CI, -0.26 to 0.54, P = .48). Our study suggests that IAC in preterm infants does not have significant long-term benefits or adverse outcomes. However, before routine use, well-designed studies and studies involving large sample sizes are needed to confirm the pharmacokinetics and long-term effects of IAC.

The advances of enteral parenteral nutrition associated cholestasis in preterm

Parenteral nutrition associated cholestasis (PNAC) is a complication of premature infants caused by multiple factors and directly related to parenteral nutrition, resulting in multiple organ dysfunctions in premature infants.Long-term parenteral nutrition and intestinal failure are the main risk factors of PNAC.Its mechanism is complicated, and there is no effective prevention and control measures at present.This article mainly reviews the pathogenesis, risk factors and application of fish oil in PNAC. Key words: Cholestasis; Premature infant; Parenteral nutrition; Phytosterol; Fish oil

EXPRESS: Sildenafil for bronchopulmonary dysplasia and pulmonary hypertension: a meta-analysis.

Bronchopulmonary dysplasia (BPD) is the most common complication in preterm infants and often complicated by pulmonary hypertension (PH), leading to substantial morbidity and mortality. Sildenafil is often used to treat PH and improve symptoms in this condition, even though evidence of safety and effectiveness is scarce. The aim of this study was to perform a systematic review and meta-analysis about the effectiveness and safety of chronic use of sildenafil in preterm infants with BPD-associated PH. Data sources were PubMed, EMBASE, and Medline. Studies reporting the effectiveness of sildenafil therapy in BPD-associated PH in newborns and infants were included. All-cause mortality, improvement in PH, improvement in respiratory scores, and adverse events were extracted. Five studies were included, yielding a total of 101 patients with 94.2 patient-years of total follow-up. The pooled mortality rate was 29.7%/year (95% confidence interval [CI] = 6.8–52.7). Estimated pulmonary arterial pressure improved > 20% in 69.3% (95% CI = 56.8–81.8) of patients within 1–6 months. Respiratory scores improved in 15.0% (95% CI = 0.0–30.4) of patients within 2–7 days. There were no serious adverse events during sildenafil therapy. This systematic review shows that in the treatment of BPD-associated PH in preterm infants, sildenafil may be associated with improvement in PAP and respiratory scores. However, there is no clear evidence of its effect on mortality rates. Considering BPD as a complex disease with variable expression patterns, these results support the need for a prospective registry and standardized approach.