A Modified Algorithm for Critical Congenital Heart Disease Screening Using Pulse Oximetry

Diagnostic value of reversed differential cyanosis in (supra)cardiac total anomalous pulmonary venous return

BACKGROUND

To investigate the occurrence of reversed differential cyanosis (RDC) in case of (supra)cardiac total anomalous pulmonary venous return (TAPVR), we explored the hemodynamic changes and oxygen saturation levels during the fetal-to-neonatal transition in (supra)cardiac TAPVR, thereby revealing determinant factors of RDC.

METHODS

A computational model was used to simulate the cardiovascular fetal-to-neonatal transition up to 24 h after birth. Abnormalities associated with TAPVR, like patent ductus arteriosus (PDA) and persistent pulmonary hypertension of the neonate (PPHN), were imposed on the model. Hemodynamic impact on flow distribution and right-sided pressures as well as oxygen saturations were assessed.

RESULTS

Model findings demonstrated that RDC in (supra)cardiac TAPVR was dependent on two key factors: (1) the type of pulmonary venous connection being supracardiac or cardiac, and (2) the presence of a patent ductus arteriosus exhibiting right-to-left shunting. Persistence of RDC was mainly determined by the latter; an increase in pulmonary-to-systemic pressure difference by PPHN or PDA-induced pulmonary over-circulation contributed to persistence of RDC.

CONCLUSION

This study highlights the significance of RDC in (supra)cardiac TAPVR and suggests to incorporate early screening ( < 24 h after birth) and to consider RDC as an immediate fail in screening protocols to ensure prompt detection of (supra)cardiac TAPVR.

IMPACT

Utilizing a validated computational model for the cardiovascular fetal-to-neonatal transition, this study sheds light on the complex hemodynamics in neonates with (supra)cardiac Total Anomalous Pulmonary Venous Return (TAPVR). Model findings suggest that the often-present pulmonary over-circulation in neonates with TAPVR might significantly contribute to the anomaly's frequent omission during pulse-oximetry screening beyond the first 24 h after birth. This study highlights the diagnostic value of reversed differential cyanosis in early screenings within the first 24 h after birth. By including RDC as an immediate fail in early pulse-oximetry screenings, the likelihood of missing (supra)cardiac TAPVR cases could be reduced.

Exploring the feasibility of using long-term stored newborn dried blood spots to identify metabolic features for congenital heart disease screening

Congenital heart disease (CHD) represents a significant contributor to both morbidity and mortality in neonates and children. There's currently no analogous dried blood spot (DBS) screening for CHD immediately after birth. This study was set to assess the feasibility of using DBS to identify reliable metabolite biomarkers with clinical relevance, with the aim to screen and classify CHD utilizing the DBS. We assembled a cohort of DBS datasets from the California Department of Public Health (CDPH) Biobank, encompassing both normal controls and three pre-defined CHD categories. A DBS-based quantitative metabolomics method was developed using liquid chromatography with tandem mass spectrometry (LC-MS/MS). We conducted a correlation analysis comparing the absolute quantitated metabolite concentration in DBS against the CDPH NBS records to verify the reliability of metabolic profiling. For hydrophilic and hydrophobic metabolites, we executed significant pathway and metabolite analyses respectively. Logistic and LightGBM models were established to aid in CHD discrimination and classification. Consistent and reliable quantification of metabolites were demonstrated in DBS samples stored for up to 15 years. We discerned dysregulated metabolic pathways in CHD patients, including deviations in lipid and energy metabolism, as well as oxidative stress pathways. Furthermore, we identified three metabolites and twelve metabolites as potential biomarkers for CHD assessment and subtypes classifying. This study is the first to confirm the feasibility of validating metabolite profiling results using long-term stored DBS samples. Our findings highlight the potential clinical applications of our DBS-based methods for CHD screening and subtype classification.

Screening for Critical Congenital Heart Defects in Sweden

OBJECTIVES

Early diagnosis of critical congenital heart defects (CCHD) improves survival. We evaluated the relative contributions of prenatal ultrasound, neonatal pulse oximetry screening (POS), and neonatal physical examination (NPE) to the early detection (before discharge) of CCHD in the context of increasing prenatal detection, and POS being a national standard since 2013.

METHODS

Retrospective, nationwide population-based study. All full-term live-born infants with CCHD in Sweden between 2014 and 2019 were included. CCHD was defined as a congenital heart defect requiring surgery or catheter-based intervention or resulting in death within 28 days of birth.

RESULTS

Of 630 infants, 89% were diagnosed before discharge or death, 42% prenatally, 11% from early symptoms, 23% by POS, and 14% from NPE after a negative POS. Four (0.6%) died undiagnosed before discharge and 64/630 (10%) were discharged undiagnosed, with 24/64 being readmitted with circulatory failure and causing 1 preoperative death. Coarctation was the most prevalent CCHD (N = 184), 25% of whom were detected prenatally (12% by POS and 29% by NPE). Two died undiagnosed before discharge and 30% were discharged undiagnosed. Transposition was the second most common defect (N = 150) and 43% were detected prenatally (33% by POS, 1 by NPE) and 2 died undiagnosed before POS. None was discharged undiagnosed.

CONCLUSIONS

POS and NPE remain important for the early detection of CCHD complementing prenatal ultrasound screening. Nevertheless, 1 in 10 with CCHD leaves the hospital without a diagnosis, with coarctation being the predominant lesion. Future research on CCHD screening should have a particular focus on this cardiac defect.

Trends in Delayed Diagnosis of Critical Congenital Heart Defects in an Era of Enhanced Screening, 2004-2018

OBJECTIVE

To describe trends in delayed diagnosis of critical congenital heart defects (CCHDs) with prenatal and postnatal screening advances.

STUDY DESIGN

We evaluated a retrospective cohort of live births with CCHD delivered between 2004 and 2018 from a statewide, population-based birth defects surveillance system in Massachusetts. Demographic information were obtained from vital records. We estimated timely (prenatal or birth/transfer hospital) and delayed diagnosis (after discharge) proportions by year and time periods coinciding with the transition to mandatory pulse oximetry in 2015.

RESULTS

We identified 1524 eligible CCHD cases among 1 087 027 live births. By 2018, 92% of cases received a timely diagnosis, most prenatally. From 2004 to 2018, prenatal diagnosis increased from 46% to 76% of cases, while hospital diagnosis decreased from 38% to 17%, and delayed diagnosis declined from 16% to 7%. These trends were consistent across all characteristics evaluated. Among cases without a prenatal diagnosis, the proportion with delayed diagnosis did not change over time, even after implementation of mandatory pulse oximetry screening. Prenatal detection increased the most among severe cases (treated or died in first month of life). Well-appearing newborns without prenatal diagnosis made up 79% of delayed diagnosis cases by 2015-2018. Delayed diagnosis was most common for coarctation.

CONCLUSIONS

While prenatal diagnosis of CCHD increased dramatically, there was no reduction in delayed diagnosis among postnatally diagnosed infants, even after pulse oximetry screening became mandatory. Pulse oximetry may not reduce delayed diagnosis in settings with high prenatal detection, and other strategies are needed to ensure timely diagnosis of well-appearing newborns.

Pulse Oximetry Screening: Association of State Mandates with Emergency Hospitalizations

We evaluated the association between implementation of state-mandated pulse oximetry screening (POS) and rates of emergency hospitalizations among infants with Critical Congenital Heart Disease (CCHD) and assessed differences in that association across race/ethnicity. We hypothesized that emergency hospitalizations among infants with CCHD decreased after implementation of mandated POS and that the reduction was larger among racial and ethnic minorities compared to non-Hispanic Whites. We utilized statewide inpatient databases from Arizona, California, Kentucky, New Jersey, New York, and Washington State (2010-2014). A difference-in-differences model with negative binomial regression was used. We identified patients with CCHD whose hospitalizations between three days and three months of life were coded as "emergency" or "urgent" or occurred through the emergency department. Numbers of emergency hospitalizations aggregated by month and state were used as outcomes. The intervention variable was an implementation of state-mandated POS. Difference in association across race/ethnicity was evaluated with interaction terms between the binary variable indicating the mandatory policy period and each race/ethnicity group. The model was adjusted for state-specific variables, such as percent of female infants and percent of private insurance. We identified 9,147 CCHD emergency hospitalizations. Among non-Hispanic Whites, there was a 22% (Confidence Interval [CI] 6%-36%) decline in CCHD emergency hospitalizations after implementation of mandated POS, on average. This decline was 65% less among non-Hispanic Blacks compared to non-Hispanic Whites. Our study detected an attenuated association with decreased number of emergency hospitalizations among Black compared to White infants. Further research is needed to clarify this disparity.

Care of the Well Newborn

Care of the newborn infant is a critical skill for general pediatricians and other providers in the practice of pediatric medicine. Optimal care relies on a thorough understanding of risk factors that may be present during the pregnancy and delivery, as well as the ability to recognize and address unanticipated problems in the postnatal period. This article focuses on antenatal care of the newborn, issues that present in the immediate postdelivery period, and care of the newborn after discharge. It also includes updated information on current topics in pediatric practice, such as the importance of vaccination, parental hesitancy in accepting common medical interventions, and updated guidelines related to the coronavirus disease 2019 pandemic. At the conclusion of the article, the reader should have a general understanding of antenatal risk factors that could affect the transition from the intrauterine environment and have the knowledge to address common issues that arise in the care of newborn infants.

Rethinking Pulse Oximetry Screening in the Level-IV Neonatal Intensive Care Unit

OBJECTIVE

This study aimed to evaluate the outcomes of newborn pulse oximetry screening in a level IV, tertiary care neonatal intensive care unit (NICU).

STUDY DESIGN

This is a retrospective cohort study of neonates who received newborn pulse oximetry screening after being admitted to a single-center, level-IV NICU between 2014 and 2021. Neonates with known critical congenital heart disease were excluded from the study.

RESULTS

Of the 4,493 neonates who had pulse oximetry screening, there were three positive screens (fail rate of 0.067%, 0.67 per 1,000 screened). The average age of screening was 818 hours. There were no positive screens of newborns who were admitted during their initial birth hospitalization and were screened while off oxygen. There were no new diagnoses of critical congenital heart disease (true positives) and there were no known false negatives.

CONCLUSION

The results bring into question whether pulse oximetry screening with the current AAP-endorsed algorithm should be re-evaluated for a level-IV NICU at a children's hospital. However, the results may not be generalizable to other NICU's where echocardiography and prenatal echocardiograms are not as readily available.

KEY POINTS

· Pulse oximetry has been shown to be effective in decreasing delayed diagnosis of critical congenital heart disease (CCHD); however, there are limited prior studies on newborn pulse oximetry in the NICU.. · In our study of over 4,000 neonates admitted to a level IV tertiary care NICU, there were no true positives (no new diagnoses of CCHD).. · Special considerations may be needed for pulse oximetry screening in the NICU setting..

Impact of an electronic medical record-based automated screening program for critical congenital heart disease: Emirates Health Services, United Arab Emirates

Background

Almost eight children per 1000 live births are expected to have a congenital heart defect globally. The seven most critical congenital heart conditions that cause severe compromise on the patient’s quality and duration of life are collectively referred to as the Critical Congenital Heart Diseases (CCHD). CCHD is a critical condition that requires prompt detection and intervention as a life-saving measure. Pulse oximetry is a non-invasive, highly specific, and moderately sensitive method that can be used for screening new-borns for CCHD. The Emirates Health Services (EHS), UAE, adopted a strategy of developing a stringent program for newborn screening of Critical Congenital Heart disease, which would help in the early diagnosis and treatment of CCHD patients. An automated EMR (Wareed) driven solution was introduced to enhance this program as part of the routine workflow for the nurse care providers.

Methods

Our study is a retrospective observational study that aims to understand: the prevalence of CCHD in our target population and to study the impact of an automated program on screening compliance and its implications for early diagnosis of CCHD.

Results

We found that an EMR-driven automated screening program was highly effective in achieving high compliance (98.9%). It created a (statistically significant) improvement in the disease identification for CCHD in live births at EHS facilities.

Conclusion

We conclude that implementing an automated protocol through the EMR can effectively improve new-born screening coverage. It reduces the days to CCHD diagnosis, which would improve health outcomes in neonates.

Coarctation of the Aorta: Delay in Diagnosis and Referral Basis from Infancy to Adulthood

OBJECTIVES

To assess the role of neonatal pulse oximetry screening and other bases of referral for patients of all ages with aortic coarctation referred to a tertiary care medical center.

STUDY DESIGN

Medical records were reviewed for 200 consecutive patients diagnosed and treated for CoA in either 2006-2011 or 2015-2019, before and after mandated pulse oximetry screening, respectively.

RESULTS

In both groups, ∼50% of patients were diagnosed within the first 5 days. Diagnosis by fetal echocardiography was more frequent in the 2015-2019 group (30.5% vs 20.5%; P < .03); obstruction often developed only as the ductus arteriosus closed. In each group, ∼25% of patients were diagnosed at age >1 year and 7% had an incidental diagnosis. Pulse oximetry screening was documented as abnormal in only 8 of 47 patients and was not performed in those with a fetal diagnosis. Evaluation of a murmur was the second most frequent basis for referral. Moderate to severe left ventricular dysfunction occurred mainly in infants in the first month, with a similar frequency in the 2 groups; these patients often had tachypnea or poor weight gain. Decreased femoral pulses or systemic hypertension were infrequently documented by referring physicians. Hypertension typically was ascribed to a renal or essential basis. Exercise symptoms occurred mainly in patients age >10 years.

CONCLUSIONS

Although fetal echocardiography and neonatal pulse oximetry contribute to the diagnosis of coarctation, physical examination has an important complementary role. Evaluation of peripheral pulses on initial and early follow-up neonatal examinations, along with consideration of coarctation in any patient with hypertension, are needed to improve timely detection.

Effects of universal critical CHD screening of neonates at a mid-sized California congenital cardiac surgery centre

INTRODUCTION

CHD affects over 1 million children in the United States. Studies show decreased mortality from CHD with newborn cardiac screening. California began a screening programme on 1 July, 2013. We evaluated the effect of mandatory screening on surgical outcomes at Loma Linda University Children's Hospital since 1 July, 2013.

METHODS

We evaluated all infants having congenital heart surgery at Loma Linda University Children's Hospital between 1 July, 2013 and 31 December, 2018. Primary target diagnoses include hypoplastic left heart syndrome, pulmonary atresia with intact ventricular septum, tetralogy of Fallot, total anomalous pulmonary venous return, transposition of the great arteries, tricuspid atresia, and truncus arteriosus. Secondary target diagnoses include aortic coarctation, double outlet right ventricle, Ebstein anomaly, interrupted aortic arch, and single ventricle. Patients were stratified by timing of diagnosis (pre-screen, screen positive, and screen negative). Primary end points were post-operative length of stay, operative mortality, absolute mortality, and actuarial survival.

RESULTS

The cohort included 274 infants. Of these, 79% were diagnosed prior to screening (46% prenatally). Only 38% of those screened were positive, with 13% of the cohort having a "missed diagnosis."

CONCLUSIONS

Primary targets were more likely to be diagnosed by screening (53%), while secondary targets were unlikely to be diagnosed by screening (10%) (p = 0.004). Outcomes such as length of stay, operative mortality, and actuarial survival were not different based on timing of diagnosis (p > 0.05). Despite late diagnosis, those not diagnosed until after screening did not have adverse outcomes.

Fetal aortic coarctation: A combination of third-trimester echocardiographic parameters to improve the prediction of postnatal outcome

OBJECTIVES

This study aims to determine a combination of third-trimester echocardiographic parameters for improving the prenatal prediction of coarctation of the aorta (CoA) after birth.

METHODS

We included all cases of suspected CoA during fetal echocardiography performed in the second and/or third trimester of pregnancy at Gaslini Children's Hospital between January 2010 and December 2020. The last prenatal ultrasound evaluation was reviewed considering most of the echocardiographic criteria were already published for prenatal CoA diagnosis. Associated minor cardiac anomalies, such as a ventricular septal defect, persistent left superior vena cava (PLSCV), and redundant foramen ovale (FO) membrane, as well as postnatal outcomes, were reported. Initial perinatal management was defined based on the risk stratification of CoA during prenatal echocardiography. Neonates were divided into two groups depending on the presence or absence of CoA after birth.

RESULTS

A total of 91 fetuses with CoA suspicion were selected, of which 27 (30%) were confirmed with CoA after birth and underwent surgical repair. All cardiac parameters except redundant FO membrane and PLSCV showed a significant correlation with CoA. Statistical analysis confirmed that cardiovascular disproportion with right predominance carries an increased risk for occurrence of CoA, especially if already evident during the ultrasound evaluation in the second trimester. Aortic valve (AV) z-score and distal transverse aortic arch (TAA) z-score resulted as the best predictors of CoA after birth. The best cutoff point for CoA discrimination with ROC analysis was an AV z-score of -1.25 and a distal TAA z-score of -0.37. A total of 46% of those without CoA were diagnosed with a cardiac defect, which was not diagnosed in utero, pulmonary hypertension, or a genetic syndrome.

CONCLUSION

The current criteria for diagnosing CoA in utero allow accurate diagnosis of most severe cases but the rate of false positives remains relatively high for milder cases. A combination of anatomic and functional echocardiographic parameters might be used in stratifying the risk of CoA. We proposed the AV and the TAA diameter z-scores as the best predictors of CoA after birth. In addition, neonates without CoA deserve proper monitoring at birth because prenatal evidence of a significant cardiovascular discrepancy between the right and left cardiac structures has an inherent risk for additional morbidity postnatally.

Saturation screening for neonatal hypoxaemia within 6 h of life: Not all about congenital cardiac disease

AIMS

To assess the outcomes of an early oxygen saturation screening programme in apparently healthy newborns for the detection of cardiac and non-cardiac disease. To describe the aetiology and incidence of infants with oxygen saturations <95% in the first 6 h of life and describe the management to discharge. In addition, we sought to identify any risk factors for failed early saturations.

METHODS

This is a retrospective hospital cohort assessing outcomes of an early saturation screening programme performed in apparently healthy newborns. Infants with oxygen saturations less than 95% were identified and their clinical notes were hand-searched. Descriptive statistics were used to present demographics, proportion of infants who passed or failed screening, subsequent diagnoses and short-term outcome. Multivariate logistic regression was used to identify independent associations of clinical factors (birthweight, gestation, elective caesarean section and gender) with failed screening.

RESULTS

Between 2014 and 2019, 14 956 healthy newborns were assessed within the first 6 h, 94 (0.63%) failed the early saturation screen. The most common causes for saturation <95% were respiratory disease or delayed transition. There were 31 (33%) infants admitted to the NICU with an additional baby requiring emergency transfer to a cardiac centre. Infants were 28 times more likely to have saturations <95% if born by elective caesarean section (odds ratio 28, conflict of interest (18.54-42.82)).

CONCLUSION

In apparently healthy newborns, early assessment of oxygen saturation, combined with clinical assessment and subsequent intervention can identify important conditions and should be considered as standard care.

Newborn Pulse Oximetry Screening at a Community Hospital: An 8-Year Experience

OBJECTIVES

To evaluate newborn pulse oximetry screening (POS) outcomes at a large community hospital and the impact of the recommended revised POS algorithm.

METHODS

A retrospective cohort study was performed to evaluate the results of POS in the well-infant nursery between 2012 and 2020. The POS results were obtained from an electronic platform. Chart review was completed for newborns with failed screens. The recommended revision to POS, no second rescreen, was applied to the data to evaluate screening outcomes.

RESULTS

Of the total 65 414 infants admitted to the well-infant nursery during this 8-year period, >99% (n = 64 780) received POS. Thirty-one infants failed POS (4.6 per 10 000 screened). All infants who failed POS were found to have a disorder, with 12 (39%) having critical congenital heart disease (CCHD), 9 (29%) having non-CCHD requiring further follow-up, and 10 (32%) having noncardiac conditions. One false-negative screen result was identified through the Maryland Department of Health Newborn Screening Follow-up Program. The positive predictive value of POS for those screened was 39% for CCHD, with a specificity of 99.97%. Eliminating the second rescreen in the POS algorithm would have resulted in an additional 5 newborns without CCHD failing POS, increasing the false-positive rate from 0.03% to 0.04%.

CONCLUSIONS

POS is an effective tool for identifying CCHD and secondary conditions. POS was successfully implemented with few missed screens and was highly specific. Elimination of the second rescreen in the pulse oximetry algorithm would have resulted in a minimal increase in false-positive results and faster evaluation of newborns with CCHD.

Pulse Oximetry Screening and Critical Congenital Heart Disease in the State of Oregon

Late diagnosis of critical congenital heart disease (CCHD) is associated with higher levels of morbidity and mortality in neonates. Nearly all states have passed laws mandating universal pulse oximetry screening (POxS) of newborns to improve early detection rates of CCHD. We performed a retrospective chart review of all transthoracic echocardiograms (TTEs) interpreted by our institution on patients between 0 and 30 days of life in the years 2010 (prior to POxS) and 2015 (after POxS). Between 2010 and 2015, the number of neonatal TTEs interpreted by our institution decreased by 18.2%. In 2015, there were 46 neonates diagnosed with CCHD with a 78% prenatal detection rate. There was only one case of a true-positive POxS. Our study demonstrated that the initiation of POxS coincided with a significant decrease in neonatal TTEs, suggesting universal POxS may impart reassurance to primary providers leading to a decrease in TTE utilization.

Delayed diagnosis in children with congenital heart disease: a mixed-method study

BACKGROUND

Delayed diagnosis of congenital heart disease (CHD) causes significant morbidity and mortality. We aimed to determine the proportion of delayed diagnosis of CHD and factors related to the delayed diagnosis.

METHODS

A prospective cohort study with mixed-methods was conducted in Dr. Sardjito Hospital, Yogyakarta, Indonesia. Patients aged < 18 years with newly diagnosed CHD and echocardiography confirmed CHD were included. Data were recorded from medical records and interviews from direct caregivers. Logistic regression was used to identify independent factors associated with the delay.

RESULTS

A total of 838 patients were included with median age of 2.9 years (0-17.7 years), with female predominance (54.2%, n = 454). The proportions of delayed diagnosis were 60.8% (510), 54.9% (373) and 86.2% (137) in all children with CHD, acyanotic and cyanotic CHD, respectively. Delayed diagnosis by doctor was the most common cause, followed by delayed diagnosis related to midwifery care, financial, referral/follow-up, and social factors. In multivariate analysis, cyanotic CHD, residence outside the city, non-syndromic, low family income, normal labour and at term gestation at birth were independently associated with the delay. At diagnosis, heart failure and pulmonary hypertension occurred in 414 (49.4%) and 132 (15.8%) children with CHD, respectively.

CONCLUSIONS

Six in ten children with CHD were diagnosed with significant delay. Delayed diagnosis by doctor was the most common cause. Children with cyanotic CHD, residence outside the city, non-syndromic, low family income, normal labour and at term gestation at birth were independently associated with the delay. Comorbid complications in delayed diagnosis of CHD were prevalent.

Effect of newborn screening for critical CHD on healthcare utilisation

OBJECTIVE

To evaluate the impact of state-mandated policies for pulse oximetry screening on healthcare utilisation, with a focus on use of echocardiograms.

DATA SOURCES/STUDY SETTING

Healthcare Cost and Utilisation Project, Statewide Inpatient Databases from 2008 to 2014 from six states.

METHODS

We defined pre- and post-mandate cohorts based on dates when pulse oximetry became mandated in each state. Linear segmented regression models for interrupted time series assessed associations between implementation of the screening and changes in rate of newborns with Critical CHD-negative echocardiogram results. We also evaluated the changes in rate of newborns who underwent echocardiogram but were not diagnosed with any health issues that could cause hypoxemia.

RESULTS

We identified 5967 critical CHD-negative echocardiograms (2847 and 3120 in the pre- and post-mandate periods, respectively). Our models detected a statistically significant increasing trend in rate of critical CHD-negative echocardiograms in the pre-mandate period (Incidence Rate Ratio: 1.08, p = 0.02), but did not detect any statistical differences in changes between pre- and post-mandate periods (Incidence Rate Ratio: 0.93, p = 0.14). Among non-Whites, an increasing trend of Critical CHD-negative echocardiogram during the pre-mandate period was detected (Incidence Rate Ratio 1.12, p < 0.01) and was attenuated during the post-mandate period (Incidence Rate Ratio 0.89, p = 0.02). Similar results were observed in the sensitivity analyses among both Whites and non-Whites.

CONCLUSIONS

Results suggest that mandatory state screening policies are associated with reductions in false-positive screening rates for hypoxemic conditions, with reductions primarily attributed to trends among non-Whites.

Updated Strategies for Pulse Oximetry Screening for Critical Congenital Heart Disease

Seven years after its addition to the US Recommended Uniform Screening Panel, newborn screening for critical congenital heart disease (CCHD) using pulse oximetry became mandatory in the United States. Although CCHD newborn screening reduces morbidity and mortality, there remain important opportunities to improve. An expert panel convened for a 1-day meeting in September 2018, including subject matter experts and representatives from stakeholder organizations. Presentations on CCHD outcomes, variations in approach to screening, and data and quality improvement helped identify improvement opportunities. The expert panel concluded that sufficient evidence exists to recommend modifying the current American Academy of Pediatrics algorithm by (1) requiring an oxygen saturation of at least 95% in both (formerly either) the upper and lower extremities to pass and (2) requiring only 1 repeat screen instead of 2 for cases that neither pass nor fail initially. The panel underscored the importance of improving public health reporting by further specifying the targets of screening and criteria for reporting outcomes (false-negative and false-positive cases). The panel also highlighted the need to ensure sufficient public health funding for CCHD newborn screening and opportunities for education and global implementation. Newborn screening for CCHD using pulse oximetry has led to significant improvements in child health outcomes. However, further important work is required to understand and improve the effectiveness and efficiency of screening.

Pulse Oximetry Screening Has Not Changed Timing of Diagnosis or Mortality of Critical Congenital Heart Disease

This study evaluates the effectiveness of mandatory pulse oximetry screening. The objective is to evaluate whether mandatory pulse oximetry testing had decreased the late critical congenital heart disease (CCHD) diagnosis rate and reduced mortality in neonatal subjects. This was a single center, retrospective cohort study comparing the timing of diagnosis of CCHD between neonates undergoing cardiac surgery in 2009-2010, prior to mandatory pulse oximetry screening, and neonates in 2015-2016, after mandatory pulse oximetry screening was instituted. Follow-up was for 1 year. We defined CCHD as lesions requiring surgical correction within 30 days of life. Exclusions included: pacemaker insertions, vascular ring divisions, closure of patent ductus arteriosus, arterial cutdown, or extracorporeal membrane oxygenation cannulation without structural heart disease as the sole procedure, or if subjects were born at home. Infants diagnosed prior to discharge from birth hospital were defined as early postnatal; late postnatal subjects were diagnosed after birth hospital discharge. In-hospital mortality and 1-year mortality were measured. A total of 527 neonates were included; 251 (47.6%) comprised the pre-mandatory pulse oximetry screening cohort (2009-2010). Only 3.6% of the 2009-2010 cohort and 4.3% of the 2015-2016 cohort were diagnosed late (p = 0.66). One-year mortality decreased during the study period (17.2% in 2009-2010 vs 10.5% in 2015-2016, p = 0.03). There were no deaths in the late CCHD diagnosis groups. Mandatory pulse oximetry screening legislation has not changed the late postnatal diagnosis rate at our institution. Mortality for neonatal CCHD has declined, but this decline is not attributable to mandatory pulse oximetry screening.

Neonatal management of prenatally suspected coarctation of the aorta

OBJECTIVES

(a) To determine the false-positive rate among newborns with prenatally suspected coarctation of the aorta (CoA) within the UCLA Health system, (b) to compare patient and maternal interventions and outcomes between false-positive cases and normal controls, and (c) to determine the timing of clinical presentation of CoA.

METHODS

We performed a single-center, retrospective case control study of all fetuses with suspected isolated CoA who underwent both fetal echocardiographic evaluation and subsequent delivery at UCLA between January 1, 2011, and December 31, 2018. Maternal and neonatal medical records were reviewed for demographic and clinical data, for cases of suspected CoA and for controls. A separate review of our institution's surgical database was performed to identify characteristics of all patients (neonatal and pediatric) with isolated CoA who underwent surgical repair during the same time period.

RESULTS

Among the 50 fetal cases of isolated suspected CoA who delivered at our institution, 47 patients (94%) were found to be normal (false positives). Compared with normal controls, patients with suspected CoA were more likely to have delayed maternal bonding, delayed feeding, admission to the intensive care unit, performance of neonatal echocardiograms, initiation of intravenous fluids and initiation of prostaglandin E1, and a longer length of hospital stay. Among the 38 patients undergoing CoA repair at our institution during the study period, four patients were prenatally diagnosed and no patient presented clinically with symptoms before 48 hours after delivery.

CONCLUSION

Compared with normal controls, patients with prenatally suspected coarctation are more likely to have delayed maternal bonding, delayed feeding, more frequent neonatal echocardiograms, and longer length of hospital stay. Further refinement of neonatal management may improve postnatal care.

Using pulse oximetry waveforms to detect coarctation of the aorta

Background

Coarctation of the aorta is a common form of critical congenital heart disease that remains challenging to diagnose prior to clinical deterioration. Despite current screening methods, infants with coarctation may present with life-threatening cardiogenic shock requiring urgent hospitalization and intervention. We sought to improve critical congenital heart disease screening by using a novel pulse oximetry waveform analysis, specifically focused on detection of coarctation of the aorta.

Methods and results

Over a 2-year period, we obtained pulse oximetry waveform data on 18 neonates with coarctation of the aorta and 18 age-matched controls hospitalized in the cardiac intensive care unit at Children’s Healthcare of Atlanta. Patients with coarctation were receiving prostaglandin E1 and had a patent ductus arteriosus. By analyzing discrete features in the waveforms, we identified statistically significant differences in the maximum rate of fall between patients with and without coarctation. This was accentuated when comparing the difference between the upper and lower extremities, with the lower extremities having a shallow slope angle when a coarctation was present (p-value 0.001). Postoperatively, there were still differences in the maximum rate of fall between the repaired coarctation patients and controls; however, these differences normalized when compared with the same individual’s upper vs. lower extremities. Coarctation patients compared to themselves (preoperatively and postoperatively), demonstrated waveform differences between upper and lower extremities that were significantly reduced after successful surgery (p-value 0.028). This screening algorithm had an accuracy of detection of 72% with 0.61 sensitivity and 0.94 specificity.

Conclusions

We were able to identify specific features in pulse oximetry waveforms that were able to accurately identify patients with coarctation and further demonstrated that these changes normalized after surgical repair. Pulse oximetry screening for congenital heart disease in neonates may thus be improved by including waveform analysis, aiming to identify coarctation of the aorta prior to critical illness. Further large-scale testing is required to validate this screening model among patients in a newborn nursery setting who are low risk for having coarctation.

Quality Improvement Interventions to Improve Critical Congenital Heart Disease Screening

Newborn screening for critical congenital heart disease (CCHD) using pulse oximetry improves detection and is associated with decreased related infant mortality. In 2015, the Healthy Hearts of Babies Act required hospitals to screen all newborns in the District of Columbia for CCHD using pulse oximetry and to provide documentation of individual screening results to the Department of Health. A regulatory report from the electronic health record revealed an opportunity to improve both documentation and protocol adherence within our hospital. We aimed to reduce documentation errors and protocol violations by 75% and sustain this improvement for 6 months.

Evaluation of Pulse Oximetry Screening Rates Among the Midwife-Attended Out-of-Hospital Birth Community in Michigan

INTRODUCTION

In Michigan, pulse oximetry screening rates for critical congenital heart defects (CCHDs) are assessed for birthing hospitals but have not been assessed for the midwife-attended births that occur in the out-of-hospital birth community. This analysis was conducted to determine pulse oximetry screening rates among the midwife-attended out-of-hospital birth community in Michigan overall, and among midwives provided with loaned pulse oximeters from the Michigan Department of Health and Human Services (MDHHS).

METHODS

Records for midwife-attended out-of-hospital births between April 1, 2014, and December 31, 2016, were linked via probabilistic matching with newborn screening records. Pulse oximetry screening rates were calculated for the midwife-attended out-of-hospital birth population overall, by midwife, and stratified by receipt of loaned pulse oximeters from MDHHS. Births from midwives who attended 5 or more nonhospital births during the study period were included in this analysis.

RESULTS

Of the 3410 midwife-attended out-of-hospital births, 20.8% (n = 710) reported as having received a pulse oximetry screening for CCHDs. For births attended by midwives who received pulse oximeters from MDHHS, 50.5% had pulse oximetry screening results reported, compared with 12.7% among births attended by midwives without a loaned pulse oximeter. Of the 78 total midwives, 18% (n = 14) reported pulse oximetry screening results on more than half of the births they attended. Of the 14 midwives who received a pulse oximeter from MDHHS, 50.0% (n = 7) reported screening results for more than half of all births they attended.

DISCUSSION

Our findings indicate that CCHD screening rates are low among midwife-attended out-of-hospital birth community. Screening rates were higher among midwives who received a pulse oximeter from MDHHS, but fewer than half of the attended births had a reported pulse oximetry screening. Further discussions with the midwife-attended out-of-hospital birth community to better understand screening barriers may be beneficial.

Should we start a nationwide screening program for critical congenital heart disease in Turkey? A pilot study on four centres with different altitudes

BACKGROUND

To investigate the feasibility of critical congenital heart disease (CCHD) screening test by pulse oximetry in four geographical regions of Turkey with different altitudes, before implementation of a nationwide screening program.

METHODS

It was a prospective multi-centre study performed in four centres, between December, 2015 and May, 2017. Pre- and post-ductal oxygen saturations and perfusion indices (PI) were measured using Masimo Radical-7 at early postnatal days. The results were evaluated according to the algorithm recommended by the American Academy of Pediatrics. Additionally, a PI value &lt;0.7 was accepted to be significant.

RESULTS

In 4888 newborns, the mean screening time was 31.5 ± 12.1 hours. At first attempt, the mean values of pre- and post-ductal measurements were: saturation 97.3 ± 1.8%, PI 2.8 ± 2.0, versus saturation 97.7 ± 1.8%, PI 2.3±1.3, respectively. Pre-ductal saturations and PI and post-ductal saturations were the lowest in Centre 4 with the highest altitude. Overall test positivity rate was 0.85% (n = 42). CCHD was detected in six babies (0.12%). Of them, right hand (91 ± 6.3) and foot saturations (92.1 ± 4.3%) were lower compared to ones with non-CCHD and normal variants (p &lt;0.05, for all comparisons). Sensitivity, specificity, positive and negative predictive values, and likelihood ratio of the test were: 83.3%, 99.9%, 11.9%, 99.9%, and 99.2%, respectively.

CONCLUSION

This study concluded that pulse oximetry screening is an effective screening tool for congenital heart disease in newborns at different altitudes. We support the implementation of a national screening program with consideration of altitude differences for our country.

Acute therapy of newborns with critical congenital heart disease

Critical congenital heart disease (cCHD) is the most common reason for acute cardiac failure in the neonatal period. cCHD, defined by systemic low cardiac output (LCO) and requiring surgery or catheter-based intervention in the first year of life, has an incidence of approximately 15% of CHD and is responsible for up to 25% fatalities of newborn infants. Clinical deterioration develops in most cases due to rapid closure of the ductus arteriosus (DA). Early diagnosis and immediate treatment determinate beneficial outcome. Critical CHD can be classified in duct-dependent systemic flow, duct-dependent pulmonary flow and transposition of the great arteries. The latter two manifest themselves in oxygen resistant cyanosis, whereas CHD with duct-dependent systemic flow may present itself with cardiogenic shock, which can be difficult to differentiate from other causes of shock such as sepsis. Besides prostaglandin therapy for reopening the arterial duct, a balanced parallel pulmonary and systemic circulation should be a therapeutic goal. In CHD with duct-dependent systemic flow a decrease of pulmonary resistance should be avoided; therefore inadequate oxygen therapy, hyperventilation and alkalosis due to excessive treatment of acidosis, should be averted. Volume therapy should be performed carefully. In CHD with duct-dependent pulmonary flow, pulmonary resistance can be decreased, in case of poor pulmonary flow systemic resistance should be increased, mild alkalosis is recommended. Intense volume therapy is in most cases necessary, except if a restrictive atrial communication is present. In addition to intensive care measures, an arsenal of catheter- and surgery-based procedures need to be hold available as back-up for emergency procedures. Transcatheter interventions are nowadays decisive. Atrial-septostomy was the first and still the most utilized high-urgency procedure; DA-stenting is used in prostaglandin-refractory duct stenosis. In the presence of critical aortic valve stenosis, palliation consists of balloon valvuloplasty. In critical aortic coarctation with myocardial failure and no response to prostaglandin, palliative balloon angioplasty may be the method of choice as bridging for corrective surgery.

Single Ventricle Palliation in a Developing Sub-Saharan African Country: What Should be Improved?

Introduction:

Single ventricle physiology management is challenging, especially in low-income countries.

Objective:

To report the palliation outcomes of single ventricle patients in a developing African country.

Methods:

We retrospectively studied 83 consecutive patients subjected to single ventricle palliation in a single center between March 2011 and December 2017. Preoperative data, surgical factors, postoperative results, and survival outcomes were analyzed. The patients were divided by palliation stage: I (pulmonary artery banding [PAB] or Blalock–Taussig shunt [BTS]), II (Glenn procedure), or III (Fontan procedure).

Results:

Of the 83 patients who underwent palliation (stages I-III), 38 deaths were observed (31 after stage I, six after stage II, and one after stage III) for an overall mortality of 45.7%. The main causes of operative mortality were multiple organ dysfunction due to sepsis, shunt occlusion, and cardiogenic shock. Twenty-eight survivors were lost to follow-up (22 after stage I, six after stage II). Thirteen stage II survivors are still waiting for stage III. The mean follow-up was 366 ± 369 days. Five-year survival was 28.4 % for PAB and 30.1% for BTS, while that for stage II and III was 49.8% and 57.1%, respectively. Age (hazard ratio, 0.61; 95% confidence interval: 0.47-0.7; P = .000) and weight at surgery (hazard ratio, 0.45; 95% confidence interval: 0.31-0.64; P = .002) impacted survival.

Conclusion:

A high-mortality rate was observed in this initial experience, mainly in stage I patients. A large number of patients were lost to follow-up. A task force to improve outcomes is urgently required.