Prevalence of gastroschisis and associated hospital time continue to rise in neonates who are admitted for intensive care

Outcome and management in neonates with gastroschisis in the third millennium-a single-centre observational study

Gastroschisis is one of the most common congenital malformations in paediatric surgery. However, there is no consensus regarding the optimal management. The aims of this study were to investigate the management and outcome and to identify predictors of outcome in gastroschisis. A retrospective observational study of neonates with gastroschisis born between 1999 and 2020 was undertaken. Data was extracted from the medical records and Cox regression analysis was used to identify predictors of outcome measured by length of hospital stay (LOS) and duration of parenteral nutrition (PN). In total, 114 patients were included. Caesarean section was performed in 105 (92.1%) at a median gestational age (GA) of 36 weeks (range 29-38) whereof (46) 43.8% were urgent. Primary closure was achieved in 82% of the neonates. Overall survival was 98.2%. One of the deaths was caused by abdominal compartment syndrome and one patient with intestinal failure-associated liver disease died from sepsis. None of the deceased patients was born after 2005. Median time on mechanical ventilation was 22 h. Low GA, staged closure, intestinal atresia, and sepsis were independent predictors of longer LOS and duration on PN. In addition, male sex was an independent predictor of longer LOS.

CONCLUSION

Management of gastroschisis according to our protocol was successful with a high survival rate, no deaths in neonates born after 2005, and favourable results in LOS, duration on PN, and time on mechanical ventilation compared to other reports. Multicentre registry with long-term follow-up is required to establish the best management of gastroschisis.

WHAT IS KNOWN

• Gastroschisis is one of the most common congenital malformations in paediatric surgery with increasing incidence. • There is no consensus among clinicians regarding the optimal management of gastroschisis.

WHAT IS NEW

• Although primary closure was achieved in 82% of the patients, mortality rate was very low (1.8%) with no deaths in neonates born after 2005 following the introduction of measurement of intraabdominal pressure at closure. • Low gestational age, staged closure, intestinal atresia, sepsis, and male sex were independent predictors of longer length of hospital stay.

Interval growth across gestation in pregnancies with fetal gastroschisis

BACKGROUND

Gastroschisis is often complicated by fetal growth restriction, preterm delivery, and prolonged neonatal hospitalization. Prenatal management and delivery decisions are often based on estimated fetal weight and interval growth; however, appropriate interval growth from week to week across gestation for these fetuses is poorly understood.

OBJECTIVE

This study aimed to determine the median increase in overall estimated fetal weight and individual biometric measurements across each week of gestation in pregnancies with fetal gastroschisis and to assess whether lower in utero fetal weight gain is predictive of postnatal growth or adverse neonatal outcomes.

STUDY DESIGN

This was a retrospective cohort study of pregnancies with gastroschisis evaluated at 5 institutions of the University of California Fetal-Maternal Consortium from December 2014 to December 2019. The inclusion criteria were prenatally diagnosed gastroschisis with at least 1 ultrasound performed at a University of California Fetal-Maternal Consortium institution. Estimated fetal weight and individual biometric measurements were recorded for each ultrasound performed at a University of California Fetal-Maternal Consortium institution from the time of gastroschisis diagnosis to delivery. Median estimated fetal weight and biometric measurements were calculated for each gestational age in 1-week increments. Neonatal outcomes collected were birthweight, length of stay, complications of gastroschisis (bowel atresia, bowel stricture, ischemic bowel before closure, or severe pulmonary hypoplasia), and growth failure at discharge.

RESULTS

We identified 95 pregnancies with fetal gastroschisis who, in aggregate, had 360 growth ultrasounds at a University of California Fetal-Maternal Consortium institution. The median interval growth was 130 g/wk. The median estimated fetal weight and abdominal circumference in fetal gastroschisis cases were approximately the tenth percentile on the Hadlock growth curve across gestation. Moreover, the median biparietal diameter, head circumference, and femur length measurements remained below the 50th percentile on the Hadlock growth curve across gestation. The median birthweight for neonates with less than the median weekly prenatal weight gain was less than for those with greater than the median weekly prenatal weight gain (2185 g vs 2780 g; P<.01). There was no difference in prenatal weight gain trajectory when comparing neonates who had or did not have bowel complications of gastroschisis.

CONCLUSION

In this multicenter cohort of pregnancies with fetal gastroschisis, the median interval growth was 130 g/wk, and overall, in utero growth closely followed the tenth percentile on the Hadlock curve. Poor prenatal growth in cases of fetal gastroschisis correlates with lower neonatal weights but did not predict a more complicated course.

Gastroschisis prevalence substantially decreased from 2009 through 2018 after a 3-fold increase from 1997 to 2008

BACKGROUND/PURPOSE

Gastroschisis incidence increased 300% in the United States from 1998 to 2013. We sought to assess trends in gastroschisis prevalence in the United States from 1997 to 2018 from a large NICU dataset.

METHODS

We performed a retrospective review of all infants in the Pediatrix Clinical Data Warehouse from 1997 to 2018. Prevalence was calculated as number of infants with gastroschisis (among all NICU admissions) divided by the total number of NICU infants. Trends were analyzed by year and also after stratification of the cohort by maternal age.

RESULTS

We included 1,433,027 infants discharged over the study period. Between 1997 and 2008, the prevalence of gastroschisis increased from 2.9 to 6.4 per 1000 infants (p < 0.01) and then decreased to 3.3 per 1000 infants (p < 0.01) by 2018. Younger mothers (<20 years old) had the highest rate of gastroschisis and the largest recent decrease in prevalence of gastroschisis (20.8/1000 infant in 2008 to 13.1/1000 infants in 2018, p < 0.01). Prevalence of gastroschisis decreased within each maternal age group.

CONCLUSION

The prevalence of gastroschisis increased from 1997 to 2008 then decreased from 2009 to 2018 and is now similar to that reported in 1997. Future research that identifies changes in underlying risk factors may help elucidate the pathogenesis of this disease.

LEVEL OF EVIDENCE

Level II prognosis study.

Utility of Formulas Using Fetal Thigh Soft Tissue Thickness in Estimating Weight in Gastroschisis

OBJECTIVES

To evaluate the utility of the fetal thigh soft tissue thickness (STT) in calculating the estimated fetal weight (EFW) in fetuses with gastroschisis versus the standard formula of Hadlock et al (Am J Obstet Gynecol 1985; 151:333-337) compared to the actual birth weight (ABW).

METHODS

A retrospective study of neonates born with gastroschisis delivered at our institution was performed. Two reviewers measured the fetal thigh STT on saved images. The estimated gestational age, fetal biometric measurements, and ABW were abstracted. In addition to the Hadlock formula, 3 STT-based formulas reported by Scioscia et al (Ultrasound Obstet Gynecol 2008; 31:314-320) and Kalantari et al (Iran J Reprod Med 2013; 11:933-938) were used to calculate the EFW.

RESULTS

Eighty-two patients with gastroschisis qualified for inclusion in our study. The mean STTs ± SD as measured by readers 1 and 2 were 10.9 ± 2.7 and 10.6 ± 2.7 mm, respectively. Seventeen (21%) fetuses were small for gestational age at birth. The Hadlock formula underestimated the EFW relative to the ABW, with an average difference of -97 g (-3.9%) and - 5.1% in terms of growth percentiles. All of the STT-based EFW formulas overestimated the EFW on average by 327 to 701 g (13%-24%) in terms of weight and 26% to 52% in terms of growth percentiles. The Hadlock formula classified 22 as having intrauterine growth restriction (sensitivity, 65%; specificity, 83%, based on the ABW). None of the STT-based formulas classified any fetuses as intrauterine growth restricted.

CONCLUSIONS

In a group of patients with gastroschisis, we found that the EFW by the fetal thigh STT calculation overestimated the average fetal weight in all of our cases.

The epidemiology, prevalence and hospital outcomes of infants with gastroschisis

OBJECTIVE

The purpose of this study is to evaluate recent trends in prevalence of gastroschisis among infants admitted for neonatal intensive care in the United States.

STUDY DESIGN

Retrospective review of a de-identified patient data. The current study extends our observations through the end of 2007 to 2015.

RESULTS

During the study period (1 January 1997 to 12 December 2015), there were 1 158 755 total discharges; 6023 (5.2/1000) had gastroschisis and 1885 (1.6/1000) had an omphalocele. Between 1997 and 2008, the reported rate of gastroschisis increased from 2.9 to 6.4/1000 discharges. From 2008 to 2011, the values have slowly decreased from 6.4 to 4.7/1000 discharges and since 2011 have been stable. The largest drop in the prevalence was in mothers who were <20 years old. In contrast, the reported rate of omphalocele was stable at 1 to 2/1000 discharges.

CONCLUSION

The prevalence of gastroschisis increased from 1997 to 2008, and then declined thereafter.

Working group reports: evaluation of the evidence to support practice guidelines for nutritional care of preterm infants-the Pre-B Project

The "Evaluation of the Evidence to Support Practice Guidelines for the Nutritional Care of Preterm Infants: The Pre-B Project" is the first phase in a process to present the current state of knowledge and to support the development of evidence-informed guidance for the nutritional care of preterm and high-risk newborn infants. The future systematic reviews that will ultimately provide the underpinning for guideline development will be conducted by the Academy of Nutrition and Dietetics' Evidence Analysis Library (EAL). To accomplish the objectives of this first phase, the Pre-B Project organizers established 4 working groups (WGs) to address the following themes: 1) nutrient specifications for preterm infants, 2) clinical and practical issues in enteral feeding of preterm infants, 3) gastrointestinal and surgical issues, and 4) current standards of infant feeding. Each WG was asked to 1) develop a series of topics relevant to their respective themes, 2) identify questions for which there is sufficient evidence to support a systematic review process conducted by the EAL, and 3) develop a research agenda to address priority gaps in our understanding of the role of nutrition in health and development of preterm/neonatal intensive care unit infants. This article is a summary of the reports from the 4 Pre-B WGs.

Frequency of anomalies and hospital outcomes in infants with gastroschisis and omphalocele

BACKGROUND

Gastroschisis and omphalocele are the most common anterior abdominal wall defects affecting infants. There are few large cohort studies describing the frequency of associated anomalies in infants with these 2 conditions. We describe associated anomalies and outcomes in infants with these defects using a large, multi-center clinical database.

METHODS

We identified all infants with gastroschisis or omphalocele from a prospectively collected database of infants discharged from 348 neonatal intensive care units in North America from 1997 to 2012. Maternal and patient demographic data, associated anomalies, and outcome data were compared between infants with gastroschisis and omphalocele.

RESULTS

A total of 4687 infants with gastroschisis and 1448 infants with omphalocele were identified. Infants with omphalocele were more likely to be diagnosed with at least 1 other anomaly compared with infants with gastroschisis (35% vs. 8%, p<0.001). Infants with omphalocele were more likely to develop pulmonary hypertension compared with those with gastroschisis (odds ratio [OR] 7.78; 95% confidence interval 5.81, 10.41) and had higher overall mortality (OR 6.81 [5.33, 8.71]).

CONCLUSION

Infants with omphalocele were more likely to have other anomalies, be diagnosed with pulmonary hypertension, and have higher mortality than infants with gastroschisis.

Prevalence and correlates of gastroschisis in 15 states, 1995 to 2005

OBJECTIVE

To identify trends in the prevalence and epidemiologic correlates of gastroschisis using a large population-based sample with cases identified by the National Birth Defects Prevention Network over the course of an 11-year period.

METHODS

This study examined 4,713 cases of gastroschisis occurring in 15 states during 1995-2005, using public use natality data sets for denominators. Multivariable Poisson regression was used to identify statistically significant risk factors, and Joinpoint regression analyses were conducted to assess temporal trends in gastroschisis prevalence by maternal age and race and ethnicity.

RESULTS

Results show an increasing temporal trend for gastroschisis (from 2.32 per 10,000 to 4.42 per 10,000 live births). Increasing prevalence of gastroschisis has occurred primarily among younger mothers (11.45 per 10,000 live births among mothers younger than age 20 years compared with 5.35 per 10,000 among women aged 20 to 24 years). In the multivariable analysis, using non-Hispanic whites as the referent group, non-Hispanic black women had the lowest risk of having a gastroschisis-affected pregnancy (prevalence ratio 0.42, 95% confidence interval [CI] 0.37-0.48), followed by Hispanics (prevalence ratio 0.86, 95% CI 0.81-0.92). Gastroschisis prevalence did not differ by newborn sex.

CONCLUSIONS

Our findings demonstrate that the prevalence of gastroschisis has been increasing since 1995 among 15 states in the United States, and that higher rates of gastroschisis are associated with non-Hispanic white maternal race and ethnicity, and maternal age younger than 25 years (particularly younger than 20 years of age).

LEVEL OF EVIDENCE

III.

Infectious complications in the management of gastroschisis

BACKGROUND/PURPOSE

Neonates with gastroschisis make up an increasing proportion of prolonged surgical NICU admissions. While infectious complications are known to increase patient morbidity, it is unclear whether they vary according to abdominal closure method, or can be predicted by initial patient assessment.

METHODS

A national, prospective, disease-specific database was evaluated for episodes of wound infection (WI) and catheter-related infection (CRI). Antibiotic use and timing, as well as method and location of abdominal closure were studied. The gastroschisis prognostic score (GPS) was calculated and evaluated as a predictor of infectious complications.

RESULTS

Of 395 patients, 48 (12.6%) had a documented abdominal WI, and 59 patients (14.9%) had at least one episode of CRI-most commonly coagulase negative staphylococcus. Most abdominal closures took place within 6 h of admission (194 = 51.3%), while 132 (34.9%) were delayed greater than 24 h. The WI rate was greater in the delayed group (21.2 vs. 8.2%, p = 0.0006). The GPS was found to predict development of an infectious complication (WI + CRI, p = 0.04).

CONCLUSION

Infectious complications remain an important consideration in the management of gastroschisis. GPS correlates with the development of infectious complications. Prophylaxis for skin flora and early closure, when feasible, may reduce WI rates.

Predictors of postnatal outcome in neonates with gastroschisis

BACKGROUND/PURPOSE

The optimal management of neonates with gastroschisis is unclear, and there is a significant morbidity. We performed a review of neonates with gastroschisis treated at our center of pediatric surgery over the last 21 years to determine predictive factors of outcome.

METHODS

Single-center retrospective analysis of 79 neonates with gastroschisis (1989-2009) was done. Length of hospital stay (LOS), days of parenteral nutrition (PN), and survival were outcome measures. Univariate and multiple regression analyses were used.

RESULTS

Overall survival was 92%, and primary closure was achieved in 80%. Median LOS was 25 days, and median duration on PN, 17 days. Intestinal atresia, closed gastroschisis, secondary closure, and sepsis were the primary variables associated with poor outcome independent of other variables, but prematurity also affected outcome. Route of delivery and associated malformations were not related to poorer outcome. Necrotizing enterocolitis did not occur in any of our patients.

CONCLUSION

Outcome in our patients was favorable as measured by survival, LOS, and days on PN. Primary predictors of poor outcome were factors related to short bowel syndrome and secondary closure, indicating a need to further improve treatment of short bowel syndrome.

Ward reduction of gastroschisis: risk stratification helps optimise the outcome

PURPOSE

Categorization of gastroschisis into low risk (simple) and high risk (complex) has been reported as an important determinant of outcome. The role of risk categorization in choosing the optimal surgical approach is unreported. This study aims to investigate the role of risk categorization in decision making for ward reduction of gastroschisis.

METHODS

Data on a cohort of 52 consecutive neonates with gastroschisis between 2000 and 2009 were reviewed. A clinical pathway based on risk categorization was implemented in 2004, and children with simple gastroschisis underwent ward reduction and those with complex gastroschisis underwent surgical closure. Thirty-three neonates since 2004 were analysed and compared to the 19 born prior to 2004.

RESULTS

Of the 33 children with gastroschisis in the study group, 23 were assessed as simple and underwent ward reduction with 96% survival. Ten had complex gastroschisis and underwent varying surgical procedures. Only six out of ten children (60%) with complex gastroschisis survived in spite of multiple surgical attempts.

CONCLUSIONS

Risk stratification of gastroschisis at birth helps in choosing optimal surgical management. Ward reduction can be successfully and safely performed in all children with simple gastroschisis. Those with complex gastroschisis require conventional surgical treatment.

Ultrasound prediction of birthweight and growth restriction in fetal gastroschisis

OBJECTIVE

Most ultrasound estimated fetal weight (EFW) formulas incorporate abdominal circumference, which may overstimate growth restriction in fetal gastroschisis. The aim of this study was to determine the optimal ultrasound formula for prediction of birthweight and fetal growth restriction (FGR) in gastroschisis.

STUDY DESIGN

We conducted a retrospective cohort analysis of singleton fetuses with gastroschisis. Percentage of error between ultrasound EFW (performed within 2 weeks of delivery) and birthweight was calculated. Agreement between EFW by ultrasound formulas and birthweight was determined by Bland-Altman limits of agreement; concordance between ultrasound and birthweight diagnosis of FGR was evaluated with McNemar's test.

RESULTS

Birthweight was best predicted by the formulas of Shepard et al and Siemer et al. Only these formulas demonstrated significant agreement with birthweight for prediction of FGR at the 5th and 10th percentiles.

CONCLUSION

The formulas of Shepard et al and Siemer et al best estimate birthweight, and their use has the potential to reduce rates of overdiagnosis of FGR.

Familial recurrence of gastroschisis: literature review and data from the population-based birth registry "Mainz Model"

BACKGROUND

Familial forms of gastroschisis are considered rare. A search for these forms in a population-based birth registry in 1993 found a recurrence risk of 3.5% among first-degree relatives. Since then, similar investigations in population-based registries have led to contradictory results.

METHODS

A search of the population-based birth registry "Mainz Model" for familial cases of gastroschisis and a systematic review of the literature were performed.

RESULTS

The Mainz Model database yielded 1 familial recurrence out of 27 gastroschisis cases. From the literature, 37 affected families could be retrieved. Among 412 gastroschises from population-based registries, 10 familial recurrences have been found. These translate into a recurrence risk of 2.4%, with a strong tendency toward underestimation.

CONCLUSION

The existing data support the hypothesis that familial recurrence of gastroschisis is much more likely than previously thought.

Gastroschisis: an update

Gastroschisis (GS) continues to increase in frequency, with several studies now reported an incidence of between 4 and 5 per 10,000 live births. The main risk factor would seem to be young maternal age, and it is in this group that the greatest increase has occurred. Whilst various geographical regions confer a higher risk, the impact of several other putative risk factors, including smoking and illicit drug use, may be less important than when first identified in early epidemiological studies. Over 90% of cases of GS will now be diagnosed on antenatal ultrasound, but its value in determining the need for early delivery remains unclear. There would appear no clear evidence for either routine early delivery or elective caesarean section for infants with antenatally diagnosed GS. Delivery at a centre with paediatric surgical facilities reduces the risk of subsequent morbidity and should represent the standard of care. The relative roles of primary closure, staged closure and ward reduction, with or without general anaesthesia, appear less clear with considerable variation between centres in both the use of these techniques and subsequent surgical outcomes. Survival rates continue to improve, with rates well in excess of 90% now routine. The limited long-term developmental data available would suggest that normal or near-normal outcomes may be expected although there remains a need for further studies.

The Pediatrix BabySteps Data Warehouse and the Pediatrix QualitySteps improvement project system--tools for "meaningful use" in continuous quality improvement

The Pediatrix BabySteps Clinical Data Warehouse (CDW) is a rich and novel tool allowing unbiased extraction of information from an entire neonatal population care by physicians and advanced practice nurses in Pediatrix Medical Group. Because it represents the practice of newborn medicine ranging from small community intensive care units to some of the largest neonatal intensive care units in the United States, it is highly representative of scope of practice in this country. Its value in defining outcome measures, quality improvement projects, and research continues to grow annually. Now coupled with the BabySteps QualitySteps program for defined clinical quality improvement projects, it represents a robust methodology for meaningful use of an electronic health care record, as designated during this era of health care reform. Continued growth of the CDW should result in continued important observations and improvements in neonatal care.