American journal of perinatology最新文献

Objective:  Increasing availability of immediate postpartum long-acting reversible contraception (LARC) has added contraceptive alternatives to bilateral tubal ligation (BTL) in the immediate postpartum period. The resultant access to long-term contraception has provided patients with improved control over the timing of pregnancies. Our objective is to evaluate changes in the utilization of immediate postpartum contraceptive methods over a 10-year period and its association with interpregnancy interval (IPI).

Study design:  Retrospective cohort study of 36,445 patients delivered at a single academic hospital center from 2012 to 2020. Deliveries <23 weeks gestation and patients who underwent a cesarean hysterectomy or postpartum hysterectomy for obstetric indications were excluded. The primary outcome was the utilization of postpartum BTL, intrauterine devices, contraceptive implants, and Depo-Provera over the study time period. The secondary outcomes were IPI and interdelivery interval (IDI). Outcomes were compared using appropriate tests of trend. We adjusted for significant covariates as assessed in baseline characteristics.

Results:  A total of 35,281 patients were included in our study. Groups were different in baseline characteristics including age, race/ethnicity, parity, BMI, insurance status, comorbidity risk, and attendance at postpartum exam. Over the study period, there was a significant difference in utilization of Depo-Provera, LARC, intrauterine device (IUD), and implant (p < 0.001). There was a significant increase in IPI (p < 0.001) and IDI (p < 0.001).

Conclusion:  We observed a significant increase in utilization of immediate postpartum LARC over the study period which corresponded to a significant increase in IPI and IDI. Our findings emphasize the importance of the availability of immediate postpartum contraception as well as its effectiveness in improving family planning options for reproductive-aged patients. We found significantly increased IPI and IDI associated with increased utilization of long-acting reversible contraceptives immediately postpartum. Our findings emphasize the importance of providers offering these options to patients as well as being comfortable initiating immediate postpartum contraception.

Key points: · Immediate postpartum LARC access has increased over the past 10 years.. · Access to more methods of contraception allows patients more options for family planning.. · Increased utilization of LARC led to increased IPI and IDI..

Objective:  This study aimed to characterize implicit bias (IB) and health disparities (HD) education in neonatal-perinatal medicine (NPM), including current educational opportunities, resources, and barriers.

Study design:  A national web-based survey was sent to NPM fellows, neonatologists, and frontline providers after iterative review by education experts from the National Neonatology Curriculum Committee. Quantitative data were analyzed with chi-square and Fisher's exact tests. Qualitative data were evaluated using thematic analysis.

Results:  Of the 452 NPM survey respondents, most desired additional IB (76%) and HD (83%) education. A greater proportion of neonatologists than fellows received IB (83 vs. 57%) and HD (87 vs. 74%) education. Only 41% of neonatologists reported that their institution requires IB training. A greater proportion of fellows than neonatologists expressed dissatisfaction with the current approaches for IB (51 vs. 25%, p < 0.001) and HD (43 vs. 25%, p = 0.015) education. The leading drivers of dissatisfaction included insufficient time spent on the topics, lack of specificity to NPM, inadequate curricular scope or depth, and lack of local educator expertise. A minority of faculty who were tasked to educate others have received specific educator training on IB (21%) and HD (16%). Thematic analysis of survey free-text responses identified three main themes on the facilitators and barriers to successful IB and HD education: individual, environmental, and curricular design variables.

Conclusion:  NPM trainees and neonatologists desire tailored, active, and expert-guided IB and HD education. Identified barriers are important to address in developing an effective IB/HD curriculum for the NPM community.

Key points: · There is a gap between the current delivery of IB/HD education and the needs of the NPM community.. · NPM trainees and neonatologists desire tailored, active, and expert-guided IB and HD education.. · A successful curriculum should be widely accessible, NPM-specific, and include facilitator training..

Respiratory support for preterm neonates in modern neonatal intensive care units is predominantly with the use of noninvasive interfaces. Continuous positive airway pressure (CPAP) and nasal intermittent positive pressure ventilation (NIPPV) are the prototypical and most commonly utilized forms of noninvasive respiratory support, and each has unique gas flow characteristics. In meta-analyses of clinical trials till date, NIPPV has been shown to likely reduce respiratory failure and need for intubation compared to CPAP. However, a significant limitation of the included studies has been the higher mean airway pressures used during NIPPV. Thus, it is unclear to what extent any benefits seen with NIPPV are due to the cyclic pressure application versus the higher mean airway pressures. In this review, we elaborate on these limitations and summarize the available evidence comparing NIPPV and CPAP at equivalent mean airway pressures. Finally, we call for further studies comparing noninvasive respiratory support modes at equal mean airway pressures. KEY POINTS: · Most current literature on CPAP vs. NIPPV in preterm neonates is confounded by use of higher mean airway pressures during NIPPV.. · In this review, we summarize existing evidence on CPAP vs. NIPPV at equivalent mean airway pressures.. · We call for future research on noninvasive support modes to account for mean airway pressures..

Objective:  Neonatal intensive care units (NICUs) account for over 35% of pediatric in-hospital costs. A better understanding of NICU expenditures may help identify areas of improvements. This study aimed to validate the Canadian Neonatal Network (CNN) costing algorithm for seven case-mix groups with actual costs incurred in a tertiary NICU and explore drivers of cost.

Study design:  A retrospective cohort study of infants admitted within 24 hours of birth to a Level-3 NICU from 2016 to 2019. Patient data and predicted costs were obtained from the CNN database and were compared to actual obtained from the hospital accounting system (Coût par Parcours de Soins et de Services). Cost estimates (adjusted to 2017 Canadian Dollars) were compared using Spearman correlation coefficient (rho).

Results:  Among 1,795 infants included, 169 (9%) had major congenital anomalies, 164 (9%) with <29 weeks' gestational age (GA), 189 (11%) with 29 to 32 weeks' GA, and 452 (25%) with 33 to 36 weeks' GA. The rest were term infants: 86 (5%) with hypoxic-ischemic encephalopathy treated with therapeutic hypothermia, 194 (11%) requiring respiratory support, and 541 (30%) admitted for other reasons. Median total NICU costs varied from $6,267 (term infants admitted for other reasons) to $211,103 (infants born with <29 weeks' GA). Median daily costs ranged from $1,613 to $2,238. Predicted costs correlated with actual costs across all case-mix groups (rho range 0.78-0.98, p < 0.01) with physician and nursing representing the largest proportion of total costs (65-82%).

Conclusion:  The CNN algorithm accurately predicts NICU total costs for seven case-mix groups. Personnel costs account for three-fourths of in-hospital total costs of all infants in the NICU.

Key points: · Very preterm infants born below 33 weeks of gestation account for most of NICU resource use.. · Human resources providing direct patient care represented the largest portion of costs.. · The algorithm strongly predicted total costs for all case-mix groups..

Objective:  Administering surfactant timely and appropriately is important to minimize lung injury but remains challenging in preterm neonates with respiratory distress syndrome. The published literature supports that lung ultrasound (LUS) score can predict surfactant need. Neonatal LUS scanning specification and parameter setting guidelines have been recently published for standardization. However, variations in scanning protocols and machine settings hinder its clinical implementation widely. This observational study aims to internally validate the suggested LUS protocol in a neonatal intensive care unit to establish a correlation between LUS scores and surfactant need as the first step of integrating LUS in the clinical practice.

Study design:  LUS was performed on 40 eligible preterm neonates within 3 hours after birth or before surfactant administration between May 2020 and March 2021. The neonates were between 27 and 32 weeks' gestational age, and all had respiratory distress. Neonates with known congenital anomalies were excluded. A high-frequency linear probe was used to obtain LUS images from six lung zones which were scored using a 0 to 3 system, yielding a maximum of 18 points. Treating physicians were blinded to the LUS score. Receiver operating characteristic analysis determined the optimal LUS score cut-off for predicting surfactant need.

Results:  Fifteen of the 40 neonates (38%) required higher oxygen fraction and received surfactant. In our cohort, an LUS score ≥10 was identified as the optimal cut-off for predicting surfactant need, with a sensitivity of 80% and specificity of 84%. The area under the curve was 0.8 (p = 0.0003). LUS predicted surfactant need at a median of 3.5 hours earlier than traditional clinical decision (p < 0.0037).

Conclusion:  LUS is a helpful adjunct for predicting surfactant need in preterm neonates. This study describes an approach to implement the LUS protocol and score for clinical decision-making in the clinical practice.

Key points: · LUS is a helpful adjunct for predicting surfactant need in preterm neonates.. · Machine setting variation and probe selection may affect LUS image and score.. · LUS score should be validated at the local unit before clinical implementation..

Objective: Hemodynamically significant patent ductus arteriosus (hsPDA) in preterm neonates is associated with end-organ injury including intraventricular hemorrhage. Early treatment may reduce morbidities but may result in overtreatment. This study aimed to examine the association between commonly obtained echocardiographic markers within the first 12 hours of life and eventual treatment of an hsPDA.

Study design: Patients with <32 weeks' gestational age had blinded echocardiograms done within the first 12 hours of life as part of research protocols. Subsequent treatment of the patent ductus arteriosus (PDA) was determined by the clinical team independent of echocardiogram results. t-tests and chi-square tests were done for continuous data and categorical outcomes. A receiver operating curve was created to optimize cutoff values.

Results:  Among 199 neonates studied (mean time of echocardiogram 6.7 h after birth), those needing PDA treatment had higher left ventricular output (LVO), right ventricular output (RVO), and superior vena cava (SVC) flow (p-values 0.007, 0.044, and 0.012, respectively). Cutoffs for predicting PDA treatment were LVO > 204 mL/kg/min (63% sensitivity, 66% specificity), RVO > 221 mL/kg/min or SVC flow > 99 mL/kg/min (sensitivities 70 and 43%, specificities 48 and 73%, respectively).

Conclusion:  Preterm neonates with higher markers of cardiac output in the first 12 hours of birth later required PDA treatment. These data are the first to use standard cardiac output measures in the first 12 hours of life to predict the need for future PDA treatment. Further prospective studies will need to be performed to corroborate these associations between echocardiographic markers and clinical outcomes/morbidities.

Key points: · Early diagnosis of hsPDA may prevent severe morbidity and death.. · There are echocardiographic markers beyond duct size and flow direction that may aid early diagnosis.. · Cardiac output markers within the first 12 hours of life may predict need for treatment of hsPDA..

Objective:  Gastroschisis is the most common congenital abdominal wall defect, with an increasing incidence. It results in extrusion of abdominal contents with associated delayed intestinal motility. Abnormal heart rate characteristics (HRCs) such as decreased variability occur due to the inflammatory response to sepsis in preterm infants. This study aimed to test the hypothesis that infants with gastroschisis have decreased heart rate variability (HRV) after birth and that this physiomarker may predict outcomes.

Study design:  We analyzed heart rate data from and clinical variables for all infants admitted with gastroschisis from 2009 to 2020.

Results:  Forty-seven infants were admitted during the study period and had available data. Complex gastroschisis infants had reduced HRV after birth. For those with sepsis and necrotizing enterocolitis, abnormal HRCs occurred early in the course of illness.

Conclusion:  Decreased HRV was associated with complex gastroschisis. Infants in this group experienced complications that prolonged time to full enteral feeding and time on total parenteral nutrition.

Key points: · Infants with gastroschisis can be classified into two subcategories, simple and complex disease.. · Those with complex disease often require prolonged stays in the neonatal intensive care unit and costly hospitalizations. We hypothesized that infants with complex gastroschisis are more likely to have abnormal HRC due to intestinal inflammation.. · In this study, we identified associations between abnormal HRV, heart rate characteristicHRC, and the development of gastroschisis complications. Additionally, we described differences in clinical characteristics between infants with complex versus simple gastroschisis..

Objective:  Delivery management interventions (DMIs) were recommended to prevent delivery-associated transmission of maternal SARS-CoV-2 (severe acute respiratory syndrome coronavirus 2) to infants without evidence of effect on early neonatal SARS-CoV-2 infection (ENI) and neonatal death <28 days of life (ND). This systematic review describes different DMI combinations and the frequency of ENI and ND.

Study design:  Individual patient data were collected from articles published from January 1, 2020 to December 31, 2021 from Cochrane review databases, Medline, and Google Scholar. Article inclusion criteria were: documented maternal SARS-CoV-2 polymerase chain reaction (PCR)-positive status 10 days before delivery or symptomatic at delivery with a positive test within 48 hours, known delivery method, and known infant SARS-CoV-2 PCR result. Primary outcomes were ENI (positive PCR at 12 hours to 10 days) and ND. All characteristics were pooled using the DerSimonian-Laird inverse variance method. Primary outcome analyses were performed using logit transformation and random effect. Pooled results were expressed as percentages (95% confidence intervals). Continuity correction was applied for all pooled results if any included study has 0 event.

Results:  A total of 11,075 publications were screened. 117 publications representing 244 infants and 230 mothers were included. All publications were case reports. ENI and ND were reported in 23.4% (18.2-29.18) and 2.1% (0.67-4.72) of cases, respectively. Among cases with available information, DMIs were reported for physical environment (85-100%), delivery-specific interventions (47-100%), and infant care practices (80-100%). No significant comparisons could be performed between different DMI combinations due to small sample size.

Conclusion:  The evidence supporting any DMI in SARS-CoV-2-infected mothers to prevent ENI or ND is extremely limited. Limitations of this meta-analysis include high risk of bias, small sample size, and large confidence intervals. This identifies the need for multinational database generation and specific studies designed to provide evidence of DMI guidelines best suited to prevent transmission from mother to neonate.

Key points: · In this review we analyzed 2 years of maternal SARS-CoV-2 published cases.. · We assessed association of delivery management interventions with infant SARS-CoV-2 infection.. · We found no evidence supporting any DMI for that purpose..

Objective:  This study aimed to describe target oxygen saturation (SpO₂) ranges used for premature infants in United States' neonatal intensive care units (NICUs) and to describe if these target SpO₂ ranges have changed in recent years.

Study design:  A 29-question survey focused on target SpO₂ practices and policies was distributed via the NICU medical directors listservs for the American Academy of Pediatrics Section of Neonatal-Perinatal Medicine and Pediatrix Medical Group between August and October of 2021. Results were collected via Research Electronic Data Capture (REDCap).

Results:  We received responses representing 170 unique, levels 2, 3, and 4 NICUs from 36 states. Most NICUs (130, 78%) have recently changed their SpO₂ targets in response to target SpO₂ clinical trials. Over time, the most commonly reported target SpO₂ range has shifted from 88-92% to 90-95. Of NICUs that changed limits, the most common lower SpO₂ limits increased from 88 to 90% and the upper SpO₂ limits changed from 92 to 95%. The interquartile range for lower SpO₂ limit shifted from 85-88% to 88-90% and the IQR for upper SpO₂ limit decreased from 92-95 to 94-95%. Most NICUs had designated conditions that would allow for deviations from standard target SpO₂ ranges. These most commonly include pulmonary hypertension (152, 95%), severe bronchopulmonary dysplasia (81, 51%), and retinopathy of prematurity (51, 32%).

Conclusion:  Oxygen saturation limits have changed over time with an overall increase in targeted SpO₂. However, there remains considerable interunit variation in SpO₂ policies. There is a need to achieve consensus to optimize clinical outcomes.

Key points: · What are the SpO2 ranges in United States' NICUs?. · There is a shift in SpO2 ranges for preterm infants in NICUs across United States.. · Variability still persists in SpO2 ranges for preterm infants in United States' NICUs..

Objective:  Hypoxic-ischemic encephalopathy (HIE) is a leading cause of morbidity and mortality in neonates. Therapeutic hypothermia (TH) has improved outcomes and mortality in infants with >36 weeks' gestational age (GA) with moderate-to-severe HIE. There are limited data on the safety and efficacy of TH in preterm infants with HIE. This study describes our experience and examines the safety of TH in neonates with <36 weeks' GA.

Study design: A single-center, retrospective study of preterm neonates born at <36 weeks' GA with moderate-to-severe HIE and treated with TH, compared to a cohort of term neonates with HIE (≥37 weeks' GA), was conducted. The term cohort was matched for degree of background abnormality on electroencephalogram, sex, inborn versus outborn status, and birth year. Medical records were reviewed for pregnancy and delivery complications, need for transfusion, sedation and antiseizure medications, electroencephalography and imaging findings, and in-hospital mortality.

Results:  Forty-two neonates born at <36 weeks' GA with HIE received TH between 2005 and 2022. Data from 42 term neonates were analyzed for comparison. The average GA of the preterm cohort was 34.6 weeks and 39.3 weeks for the term cohort. Apgar scores, degree of acidosis, and need for blood product transfusions were similar between groups. Preterm infants were more likely to require inotropic support (55 vs. 29%, p = 0.026) and hydrocortisone (36 vs. 12%, p = 0.019) for hypotension. The proportion of infants without evidence of injury on magnetic resonance imaging was similar in both groups: 43 versus 50% in preterm and term infants, respectively. No significant difference was found in mortality between groups.

Conclusion:  In this single-center cohort, TH in preterm infants appears to be as safe as in term infants, with no significant increase in intracranial bleeds or mortality. Preterm infants more frequently required inotropes and steroids for hypotension. Further research is needed to determine efficacy of TH in preterm infants.

Key points: · TH is used off-protocol in preterm infants.. · Preterm and term infants have similar mortality.. · Preterm cohort required more inotropic support..