Primary Closure versus Bedside Silo and Delayed Closure for Gastroschisis: A Truncated Prospective Randomized Trial

Management of Gastroschisis: Timing of Delivery, Antibiotic Usage, and Closure Considerations (A Systematic Review From the American Pediatric Surgical Association Outcomes & Evidence Based Practice Committee)

BACKGROUND

No consensus exists for the initial management of infants with gastroschisis.

METHODS

The American Pediatric Surgical Association (APSA) Outcomes and Evidenced-based Practice Committee (OEBPC) developed three a priori questions about gastroschisis for a qualitative systematic review. We reviewed English-language publications between January 1, 1970, and December 31, 2019. This project describes the findings of a systematic review of the three questions regarding: 1) optimal delivery timing, 2) antibiotic use, and 3) closure considerations.

RESULTS

1339 articles were screened for eligibility; 92 manuscripts were selected and reviewed. The included studies had a Level of Evidence that ranged from 2 to 4 and recommendation Grades B-D. Twenty-eight addressed optimal timing of delivery, 5 pertained to antibiotic use, and 59 discussed closure considerations (Figure 1). Delivery after 37 weeks post-conceptual age is considered optimal. Prophylactic antibiotics covering skin flora are adequate to reduce infection risk until definitive closure. Studies support primary fascial repair, without staged silo reduction, when abdominal domain and hemodynamics permit. A sutureless repair is safe, effective, and does not delay feeding or extend length of stay. Sedation and intubation are not routinely required for a sutureless closure.

CONCLUSIONS

Despite the large number of studies addressing the above-mentioned facets of gastroschisis management, the data quality is poor. A wide variation in gastroschisis management was documented, indicating a need for high quality RCTs to provide an evidence-based approach when caring for these infants.

TYPE OF STUDY

Qualitative systematic review of Level 1-4 studies.

Challenges and lessons learnt in the management of an HIV-exposed neonate with gastroschisis in a resource-limited setting: case report

Introduction and importance

The incidence of congenital abdominal wall defects is increasing, but few cases have been reported in the African population.

Case presentation

The authors report a case of gastroschisis in a term neonate who was delivered through spontaneous vaginal delivery (SVD) in a remote health facility before transfer to a tertiary hospital in Uganda. Although there was no environmental exposure to teratogens, the major risk factor of Gastroschisis, the neonate was low birth weight, HIV-exposed, and the mother had not received folic acid supplementation during the first trimester, known risk factors of gastroschisis. Physical examination revealed intrauterine growth restriction in addition to the findings of the abdominal wall defect.

Clinical discussion

There were many missed opportunities in the management of this case which was marred by delayed essential care of the newborn, delayed surgical repair, and transfer to the tertiary surgical centre. At the tertiary surgical centre, a modified silo technique with delayed secondary closure was used to repair the defect, but the neonate still met its death before completing day 7 of life.

Conclusion

This case of gastroschisis shows how the diagnosis and management of neonates born with major congenital structural abnormalities in resource-limited settings is still desirable due to lack of sophisticated medical care services to assist in early detection during pregnancy and early surgical intervention at birth to prevent associated mortality. The authors discuss the lessons learnt and provide recommendations for improvement in the care of neonates born with abdominal wall defects and other congenital birth defects.

Comparison of Perinatal Outcomes between Patients with Suspected Complex and Simple Gastroschisis

OBJECTIVE

 The aim of this study was to compare perinatal outcomes between patients with and without prenatal ultrasound markers predictive of complex gastroschisis.

STUDY DESIGN

 A prospective cohort of 98 patients with isolated fetal gastroschisis underwent antenatal ultrasound and delivered in a tertiary referral center. Patients were classified according to eight ultrasonographic markers predictive of complexity, and perinatal outcomes were assessed accordingly. The primary outcome was the presence of fetal growth restriction and staged SILO reduction postnatally. RESULTS:  Of all fetuses, 54.1% (n = 53) displayed ultrasonographic markers predictive of complexity at 32.7 ± 4.3 weeks of gestation. Gastric dilatation was the most frequent marker followed by extra-abdominal bowel dilatation. The presence of ultrasound markers predictive of complexity, was not associated with fetal growth restriction but its absence was less associated with staged SILO reduction of the abdominal wall postnatally with a relative risk of 0.79 (CI 95% 0.17-0.53).

CONCLUSION

 Fetuses with ultrasound markers that predict complexity were not associated with fetal growth restriction, but its absence was less associated with staged SILO reduction of the abdominal wall postnatally. It is necessary to unify criteria, establish cut-off points, and the optimal moment to measure these markers.

KEY POINTS

· The association between ultrasound markers and adverse perinatal outcomes in fetuses with gastroschisis remain controversial.. · The absence of ultrasound markers that predict complexity was less associated with staged SILO reduction postnatally.. · It is necessary to unify criteria, establish cut-off points, and the optimal moment to measure these markers..

Race and Ethnicity of Infants Enrolled in Neonatal Clinical Trials: A Systematic Review

Importance

Representativeness of populations within neonatal clinical trials is crucial to moving the field forward. Although racial and ethnic disparities in research inclusion are well documented in other fields, they are poorly described within neonatology.

Objective

To describe the race and ethnicity of infants included in a sample of recent US neonatal clinical trials and the variability in this reporting.

Evidence Review

A systematic search of US neonatal clinical trials entered into Cochrane CENTRAL 2017 to 2021 was conducted. Two individuals performed inclusion determination, data extraction, and quality assessment independently with discrepancies adjudicated by consensus.

Findings

Of 120 studies with 14 479 participants that met the inclusion criteria, 75 (62.5%) included any participant race or ethnicity data. In the studies that reported race and ethnicity, the median (IQR) percentage of participants of each background were 0% (0%-1%) Asian, 26% (9%-42%) Black, 3% (0%-12%) Hispanic, 0% (0%-0%) Indigenous (eg, Alaska Native, American Indian, and Native Hawaiian), 0% (0%-0%) multiple races, 57% (30%-68%) White, and 7% (1%-21%) other race or ethnicity. Asian, Black, Hispanic, and Indigenous participants were underrepresented, while White participants were overrepresented compared with a reference sample of the US clinical neonatal intensive care unit (NICU) population from the Vermont Oxford Network. Many participants were labeled as other race or ethnicity without adequate description. There was substantial variability in terms and methods of reporting race and ethnicity data. Geographic representation was heavily skewed toward the Northeast, with nearly one-quarter of states unrepresented.

Conclusions and Relevance

These findings suggest that neonatal research may perpetuate inequities by underrepresenting Asian, Black, Hispanic, and Indigenous neonates in clinical trials. Studies varied in documentation of race and ethnicity, and there was regional variation in the sites included. Based on these findings, funders and clinical trialists are advised to consider a 3-point targeted approach to address these issues: prioritize identifying ways to increase diversity in neonatal clinical trial participation, agree on a standardized method to report race and ethnicity among neonatal clinical trial participants, and prioritize the inclusion of participants from all regions of the US in neonatal clinical trials.

Gastroschisis in Sub-Saharan Africa: a scoping review of the prevalence, management practices, and associated outcomes

Gastroschisis is a congenital defect of the anterior abdominal wall characterized by a periumbilical abdominal wall defect with associated bowel protrusion. Limitations in the diagnosis and management of gastroschisis in Sub-Saharan African countries contribute to the high mortality rate. Few studies have been published despite its significant contribution to neonatal mortality in Sub-Saharan Africa. This review study explores the prevalence of gastroschisis, likewise the management and clinical outcomes. Full-text articles reporting the prevalence, management, and associated outcomes of gastroschisis in Sub-Saharan Africa were included. Data were extracted from databases such as PubMed, Google Scholar, and Ajol following a systematic search. The study was reported following the PRISMA-ScR guideline. A total of ten articles which included studies conducted from 1999 to 2022 fulfilled the criteria. The prevalence of gastroschisis varied widely, ranging from 0.026 to 1.75 with an overall mortality rate of 62.48%. Young maternal age is strongly associated with the incidence of gastroschisis. The study showed a slight male preponderance with a M: F ratio of 1.12:1. Staged closure with silos is the preferred method of management, it is explicitly linked to improved clinical outcomes. The prevalence rate and associated mortality of gastroschisis remain alarmingly high in most of the studies. There is a need for advanced diagnostic and management practices as well as increased awareness of gastroschisis to reduce mortality and improve survival outcomes.

Low Cost Gastroschisis Silo for Sub-Saharan Africa: Testing in a Porcine Model

BACKGROUND

Gastroschisis mortality in sub-Saharan Africa (SSA) remains high at 59-100%. Silo inaccessibility contributes to this disparity. Standard of care (SOC) silos cost $240, while median monthly incomes in SSA are < $200. Our multidisciplinary American and Ugandan team designed and bench-tested a low-cost (LC) silo that costs < $2 and is constructed from locally available materials. Here we describe in vivo LC silo testing.

METHODS

A piglet gastroschisis model was achieved by eviscerating intestines through a midline incision. Eight piglets were randomized to LC or SOC silos. Bowel was placed into the LC or SOC silo, maintained for 1-h, and reduced. Procedure times for placement, intestinal reduction, and silo removal were recorded. Tissue injury of the abdominal wall and intestine was assessed. Bacterial and fungal growth on silos was also compared.

RESULTS

There were no gross injuries to abdominal wall or intestine in either group or difference in minor bleeding. Times for silo application, bowel reduction, and silo removal between groups were not statistically or clinically different, indicating similar ease of use. Microbiologic analysis revealed growth on all samples, but density was below the standard peritoneal inoculum of 10⁵ CFU/g for both silos. There was no significant difference in bacterial or fungal growth between LC and SOC silos.

CONCLUSION

LC silos designed for manufacturing and clinical use in SSA demonstrated similar ease of use, absence of tissue injury, and acceptable microbiology profile, similar to SOC silos. The findings will allow our team to proceed with a pilot study in Uganda.

Gastroschisis for the Gastroenterologist: Updates on Epidemiology, Management, and Outcomes

Gastroschisis is a common congenital abdominal wall defect, likely influenced by environmental factors in utero, with increasing prevalence in the United States. Early detection of gastroschisis in utero has become the standard with improved prenatal care and screening. There are multiple surgical management techniques, though sutureless closure is being used more frequently. Postoperative feeding difficulty is common and requires vigilance for complications, such as necrotizing enterocolitis. Infants with simple gastroschisis are expected to have eventual catch-up growth and normal development, while those with complex gastroschisis have higher morbidity and mortality. Management requires collaboration amongst several perinatal disciplines, including obstetrics, maternal fetal medicine, neonatology, pediatric surgery, and pediatric gastroenterology for optimal care and long-term outcomes.

The medical and surgical management of gastroschisis

Gastroschisis (GS) is a full-thickness abdominal wall defect in which fetal intestine herniates alongside the umbilical cord into the intrauterine cavity, resulting in an intestinal injury of variable severity. An increased prevalence of gastroschisis has been observed across several continents and is a focus of epidemiologic study. Prenatal diagnosis of GS is common and allows for delivery planning and treatment in neonatal intensive care units (NICUs) by collaborative interdisciplinary teams (neonatology, neonatal nursing and pediatric surgery). Postnatal treatment focuses on closure of the defect, optimized nutrition, complication avoidance and a timely transition to enteral feeding. Babies born with complex GS are more vulnerable to complications, have longer and more resource intensive hospital stays and benefit from standardized care pathways provided by teams with expertise in managing infants with intestinal failure. This article will review the current state of knowledge related to the medical and surgical management and outcomes of gastroschisis with a special focus on the role of the neonatologist in supporting integrated team-based care.

The incidence of abdominal surgical site infections after abdominal birth defects surgery in infants: A systematic review with meta-analysis

BACKGROUND

Surgical site infections (SSI) are a frequent and significant problem understudied in infants operated for abdominal birth defects. Different forms of SSIs exist, namely wound infection, wound dehiscence, anastomotic leakage, post-operative peritonitis and fistula development. These complications can extend hospital stay, surge medical costs and increase mortality. If the incidence was known, it would provide context for clinical decision making and aid future research. Therefore, this review aims to aggregate the available literature on the incidence of different SSIs forms in infants who needed surgery for abdominal birth defects.

METHOD

The electronic databases Pubmed, EMBASE, and Cochrane library were searched in February 2020. Studies describing infectious complications in infants (under three years of age) were considered eligible. Primary outcome was the incidence of SSIs in infants. SSIs were categorized in wound infection, wound dehiscence, anastomotic leakage, postoperative peritonitis, and fistula development. Secondary outcome was the incidence of different forms of SSIs depending on the type of birth defect. Meta-analysis was performed pooling reported incidences in total and per birth defect separately.

RESULTS

154 studies, representing 11,786 patients were included. The overall pooled percentage of wound infections after abdominal birth defect surgery was 6% (95%-CI:0.05-0.07) ranging from 1% (95% CI:0.00-0.05) for choledochal cyst surgery to 10% (95%-CI:0.06-0.15) after gastroschisis surgery. Wound dehiscence occurred in 4% (95%-CI:0.03-0.07) of the infants, ranging from 1% (95%-CI:0.00-0.03) after surgery for duodenal obstruction to 6% (95%-CI:0.04-0.08) after surgery for gastroschisis. Anastomotic leakage had an overall pooled percentage of 3% (95%-CI:0.02-0.05), ranging from 1% (95%-CI:0.00-0.04) after surgery for duodenal obstruction to 14% (95% CI:0.06-0.27) after colon atresia surgery. Postoperative peritonitis and fistula development could not be specified per birth defect and had an overall pooled percentage of 3% (95%-CI:0.01-0.09) and 2% (95%-CI:0.01-0.04).

CONCLUSIONS

This review has systematically shown that SSIs are common after correction for abdominal birth defects and that the distribution of SSI differs between birth defects.

What is the main factor in predicting the morbidity and mortality in patients with gastroschisis: delivery time, delivery mode, closure method, or the type of gastroschisis (simple or complex)?

Background/aim

There are numerous debates in the management of gastroschisis (GS). The current study aimed to evaluate perinatal outcomes and surgical and clinical characteristics among GS patients based on their type of GS, abdominal wall closure method, and delivery timing.

Materials and methods

This study was a retrospective analysis of prospectively collected data of 29 fetuses with GS that were prenatally diagnosed, delivered, and managed between June 2015 and December 2019 at the Obstetrics and Pediatric Surgery Clinics of Kanuni Sultan Süleyman Training and Research Hospital.

Results

Twenty-three of the patients had simple GS, and six of them had complex GS. The reoperation requirement, number of operations, duration of mechanical ventilation, time to initiate feeding, time to full enteral feeding, total parenteral nutrition (TPN) duration, TPN-associated cholestasis, wound infection, sepsis, and necrotizing enterocolitis were significantly lower in the simple GS group than in the complex GS group. The mean hospital length of stay was 3.5 times longer in the complex GS group (121.50 ± 24.42 days) than in the simple GS group (33.91 ± 4.13 days, p = 0.009). There were no cases of death in the simple GS group. However, two deaths occurred in the complex GS group.

Conclusion

This study indicated that simple GS, compared with complex GS, was associated with improved neonatal outcomes. We suggest that the main factor affecting the patients’ outcomes is whether the patient is a simple or complex GS rather than the abdominal wall closure method.

Failure of primary closure predicts prolonged length of stay in gastroschisis patients

PURPOSE

Current literature regarding outcomes of gastroschisis closure methods do not highlight differences in patients who successfully undergo primary closure with those who fail and require silo placement. We hypothesize that failure of primary closure has significant effects on clinical outcomes such as length of stay and time to enteral feeding.

METHODS

We conducted a retrospective review between 2009 and 2018 of gastroschisis patients at a tertiary pediatric referral hospital. We compared patients successfully undergoing primary closure to patients who failed an initial primary closure attempt. Bivariate and multivariate linear regression models were used to assess the association of closure method on clinical outcomes.

RESULTS

Sixty-eight neonates were included for analysis, with 44 patients who underwent primary closure and 24 who failed primary closure. On multivariate regression analysis, primary closure patients had shorter estimated time to starting and to full enteral feeds and decreased LOS as compared to those who failed primary closure. Two patients (4.44%) had complications related to primary closure.

CONCLUSION

Patients able to undergo primary closure for gastroschisis were more likely to have a shorter length of stay, shorter time to enteral feeds, and use much fewer medical resources. Initial primary closure is a safe method for most patients.

Gastroschisis: A State-of-the-Art Review

Gastroschisis, the most common type of abdominal wall defect, has seen a steady increase in its prevalence over the past several decades. It is identified, both prenatally and postnatally, by the location of the defect, most often to the right of a normally-inserted umbilical cord. It disproportionately affects young mothers, and appears to be associated with environmental factors. However, the contribution of genetic factors to the overall risk remains unknown. While approximately 10% of infants with gastroschisis have intestinal atresia, extraintestinal anomalies are rare. Prenatal ultrasound scans are useful for early diagnosis and identification of features that predict a high likelihood of associated bowel atresia. The timing and mode of delivery for mothers with fetuses with gastroschisis have been somewhat controversial, but there is no convincing evidence to support routine preterm delivery or elective cesarean section in the absence of obstetric indications. Postnatal surgical management is dictated by the condition of the bowel and the abdominal domain. The surgical options include either primary reduction and closure or staged reduction with placement of a silo followed by delayed closure. The overall prognosis for infants with gastroschisis, in terms of both survival as well as long-term outcomes, is excellent. However, the management and outcomes of a subset of infants with complex gastroschisis, especially those who develop short bowel syndrome (SBS), remains challenging. Future research should be directed towards identification of epidemiological factors contributing to its rising incidence, improvement in the management of SBS, and obstetric/fetal interventions to minimize intestinal damage.

Multidisciplinary Development of a Low-Cost Gastroschisis Silo for Use in Sub-Saharan Africa

BACKGROUND

Gastroschisis silos are often unavailable in sub-Saharan Africa (SSA), contributing to high mortality. We describe a collaboration between engineers and surgeons in the United States and Uganda to develop a silo from locally available materials.

METHODS

Design criteria included the following: < $5 cost, 5 ± 0.25 cm opening diameter, deformability of the opening construct, ≥ 500 mL volume, ≥ 30 N tensile strength, no statistical difference in the leakage rate between the low-cost silo and preformed silo, ease of manufacturing, and reusability. Pugh scoring matrices were used to assess designs. Materials considered included the following: urine collection bags, intravenous bags, or zipper storage bags for the silo and female condom rings or O-rings for the silo opening construct. Silos were assembled with clothing irons and sewn with thread. Colleagues in Uganda, Malawi, Tanzania, and Kenya investigated material cost and availability.

RESULTS

Urine collection bags and female condom rings were chosen as the most accessible materials. Silos were estimated to cost < $1 in SSA. Silos yielded a diameter of 5.01 ± 0.11 cm and a volume of 675 ± 7 mL. The iron + sewn seal, sewn seal, and ironed seal on the silos yielded tensile strengths of 31.1 ± 5.3 N, 30.1 ± 2.9 N, and 14.7 ± 2.4 N, respectively, compared with the seal of the current standard-of-care silo of 41.8 ± 6.1 N. The low-cost silos had comparable leakage rates along the opening and along the seal with the spring-loaded preformed silo. The silos were easily constructed by biomedical engineering students within 15 min. All silos were able to be sterilized by submersion.

CONCLUSIONS

A low-cost gastroschisis silo was constructed from materials locally available in SSA. Further in vivo and clinical studies are needed to determine if mortality can be improved with this design.

Variation in hospital costs for gastroschisis closure techniques

BACKGROUND

In newborns with gastroschisis, both primary repair and delayed fascial closure with initial silo placement are considered safe with similar outcomes although cost differences have not been explored.

METHODS

A retrospective review was performed of newborns admitted with gastroschisis at a single center from 2011 to 2016. Demographic, clinical, and cost data during the initial hospitalization were collected. Differences between procedure costs and clinical endpoints were analyzed using multivariable linear regression adjusting for prematurity, complicated gastroschisis, and performance of additional operations.

RESULTS

80 patients with gastroschisis met inclusion criteria. Rates of primary fascial, primary umbilical cord closure, and delayed closure were 14%, 65%, and 21%, respectively. Delayed closure was associated with an increase in total hospital costs by 57% compared to primary repair (p < 0.001). In addition, delayed closure was associated with increased total and NICU LOS (p < 0.05), parenteral nutrition duration (p = 0.02), ventilator days (p < 0.001), time to goal enteral feeds (p = 0.01), and all cost sub-categories except ward room costs (p < 0.01).

CONCLUSION

Delayed fascial closure was associated with significantly greater hospital costs during the index admission.