Neurodevelopmental outcomes and surgery in neonates

Neurodevelopmental outcomes after neonatal surgery

Children who require surgery in the newborn period are at risk for long-term neurodevelopmental impairment (NDI). There is growing evidence that surgery during this critical window of neurodevelopment gives rise to an increased risk of brain injury, predisposing to neurodevelopmental challenges including motor delays, learning disabilities, executive function impairments, and behavioral disorders. These impairments can have a significant impact on the quality of life of these children and their families. This review explores the current literature surrounding the effect of neonatal surgery on neurodevelopment, as well as the spectrum of proposed mechanisms that may impact neurodevelopmental outcomes. The goal is to identify modifiable risk factors and patients who may benefit from close neurodevelopmental follow-up and early referral to therapy.

Postoperative Osteopathic Manipulative Treatment in Children with Esophageal Atresia: Potential Benefits on the Anthropometric Parameters

Esophageal atresia (EA) is a congenital malformation that affects the normal esophageal development. Surgical treatment, although restoring the integrity of the alimentary tract, may lead to long-term sequelae-like developmental abnormalities and musculoskeletal deformities. We evaluated the effects of osteopathic manipulative treatment (OMT) on the recovery of the range of the right upper limb movement and on the rise of the auxological parameters. A case series of five children affected by type C EA were described. Six OMT sessions were performed over a 4-month period. At each treatment, height, weight, body mass index (BMI) and range of motion (ROM) in elevation of the right upper limb were assessed. OMT was applied to improve scar, larynx, rib cage, and sternum mobility. An average change of 2.3 cm in height and an average increase of 8° in the ROM of the upper limb in the period of study were detected. Additionally, OMT could improve the anthropometric data and the mobility of the right upper limb of children surgically treated for EA. Further studies that evaluate the effectiveness of OMT in post surgical treatment of congenital malformations of the thorax can be considered in the future.

Head circumference in infants undergoing Foker process for long-gap esophageal atresia repair: Call for attention

INTRODUCTION

We extended our pilot study in infants following long-gap esophageal atresia (LGEA) repair to report head circumference, an easily obtainable indirect measure of brain size. Data are presented in the context of previously reported body weight and T2-weighted MRI measures of intracranial and brain volumes.

METHODS

Clinical information and head circumference were obtained for term-born (n = 13) and premature (n = 13) infants following LGEA repair with Foker process, as well as healthy term-born controls (n = 20) <1-year corrected age who underwent non-sedated research MRI. General Linear Model univariate analysis with corrected age at scan as a covariate and Bonferroni adjusted p values assessed group differences.

RESULTS

We report no difference in head circumference between the three groups. Such findings paralleled trends in body weight and total intracranial volume but not in brain volume as previously reported for the same pilot cohort.

DISCUSSION

Results suggest uncompromised somatic and head growth after repair of LGEA. In contrast, a novel finding of discrepancy between head circumference (novel data) and brain size (previously published data) in the same cohort suggests that head circumference might not be the best indirect measure of brain size in selected group of patients.

A referral pathway for potentially abnormal neurodevelopment in children with heart disease in the United Kingdom: a Delphi consensus

INTRODUCTION

Children with congenital heart disease have complex medical and neurodevelopmental needs. We aimed to develop a multi-professional consensus-based referral pathway applicable to action the results of the brief developmental assessment (BDA), a validated early recognition tool, that categorises the neurodevelopmental status as green (appropriate for age), amber (equivocal) or red (delayed) in children aged between 4 months and 5 years.

METHODS

A Delphi consensus survey detailing two scenarios-a child categorised as delayed (red) and another as equivocal (amber) on administration of the BDA at the time of discharge from the tertiary centre-was sent to 80 expert professionals from primary, secondary and tertiary care seeking agreement on next steps and referral pathways. An iterative process was proposed with a pre-defined rule of 75% for consensus.

RESULTS

The survey was completed by 77 Delphi panel experts in Round 1, 73 in Round 2 and 70 in Round 3. Consensus was achieved (1) for the child with amber or red BDA, the child should be under the care of a paediatrician with expertise in cardiology (PEC) (or general paediatrician if no PEC) based at their local hospital, (2) for the child with red BDA, the PEC should initiate referral to community services at first assessment, (3) for child with amber BDA, a re-assessment by the health visitor should occur within 1-2 months, with referral to community services and notification to the PEC if on-going concerns.

CONCLUSIONS

The Delphi process enabled a consensus to be reached between health professionals on referral pathways for specialist neurodevelopmental assessment/treatment for children with heart disease, in response to amber or red BDA results. The agreed referral pathway, if implemented, could underpin a national guideline to address and intervene on the neurodevelopmental difficulties in children with heart disease.

Neurologic Injury and Brain Growth in the Setting of Long-Gap Esophageal Atresia Perioperative Critical Care: A Pilot Study

We previously showed that infants born with long-gap esophageal atresia (LGEA) demonstrate clinically significant brain MRI findings following repair with the Foker process. The current pilot study sought to identify any pre-existing (PRE-Foker process) signs of brain injury and to characterize brain and corpus callosum (CC) growth. Preterm and full-term infants (n = 3/group) underwent non-sedated brain MRI twice: before (PRE-Foker scan) and after (POST-Foker scan) completion of perioperative care. A neuroradiologist reported on qualitative brain findings. The research team quantified intracranial space, brain, cerebrospinal fluid (CSF), and CC volumes. We report novel qualitative brain findings in preterm and full-term infants born with LGEA before undergoing Foker process. Patients had a unique hospital course, as assessed by secondary clinical end-point measures. Despite increased total body weight and absolute intracranial and brain volumes (cm3) between scans, normalized brain volume was decreased in 5/6 patients, implying delayed brain growth. This was accompanied by both an absolute and relative CSF volume increase. In addition to qualitative findings of CC abnormalities in 3/6 infants, normative CC size (% brain volume) was consistently smaller in all infants, suggesting delayed or abnormal CC maturation. A future larger study group is warranted to determine the impact on the neurodevelopmental outcomes of infants born with LGEA.

Neurodevelopmental Outcomes after Intravitreal Bevacizumab Therapy for Retinopathy of Prematurity: A Prospective Case-Control Study

PURPOSE

To evaluate the neurodevelopmental and ocular developmental outcomes in premature children who have undergone intravitreal bevacizumab injection (IVB) for treatment of type 1 retinopathy of prematurity (ROP).

DESIGN

Prospective case-control study.

PARTICIPANTS

We enrolled 3 groups of premature patients: premature children who had no history of ROP (group 0), premature children with history of ROP without treatment (group 1), and premature children with ROP who had received a single IVB (0.625 mg; group 2).

METHODS

Ocular developmental assessment, including cycloplegic refractometry, axial length, Cardiff acuity, and neurodevelopmental assessment via the Bayley Scales of Infant and Toddler Development, Third Edition (Bayley III), were performed at 1 to 3 years of age and were compared between groups.

MAIN OUTCOME MEASURES

Ocular developmental outcomes and Bayley III scores.

RESULTS

A total of 148 patients (85 boys and 63 girls) were included. The mean age at assessment was 1.49±0.59 years. Group 0 patients demonstrated significantly higher gestational age (GA), birth weight, and Apgar scores compared with group 1 and 2 patients. There were no significant differences between groups 1 and 2 in demographics or systemic risk factors except for lower GA in group 2. The cylindrical power was significantly larger in groups 1 and 2 compared with group 0. The spherical equivalent was significantly more myopic and the Cardiff acuity was significantly poorer in group 2 than in group 0. There were no significant differences between groups 1 and 2 in refractive status, axial length, or Cardiff acuity. Neurodevelopmental assessment using Bayley III showed no significant difference among the 3 groups in any aspect after adjusting for GA and other systemic risk factors. The risks for poor neurodevelopmental outcomes also were not significantly different.

CONCLUSIONS

At the mean age of 1.5 years, children with prior history of IVB (group 2) showed similar refractive and visual outcomes and similar neurodevelopmental outcomes compared with premature patients with ROP without requirement of treatment (group 1), although there is a possibility that a small but clinically significant difference may not have been detected in the current study.

Comparison of intravitreal bevacizumab injection and laser photocoagulation for type 1 zone II retinopathy of prematurity

Purpose

To compare the efficacy of intravitreal bevacizumab (IVB) injection with conventional laser photocoagulation in eyes with type 1 zone II retinopathy of prematurity (ROP).

Methods

Preterm infants with type 1 ROP in zone II (stage 2 or 3 ROP with plus disease) were randomly assigned to intravitreal injection of 0.625 mg/0.025 ml bevacizumab (Group 1) or laser photocoagulation (Group 2). Patients were followed weekly for 4 weeks and then biweekly till 90 weeks gestational age. Also, spherical and cylindrical refractive errors were compared at 90 weeks postmenstrual age (PMA).

Results

A total of 116 preterm infants (232 eyes) were treated and completed the follow-up period. IVB injection was done in 154 eyes (77 cases), and laser photocoagulation was done in 78 eyes (39 cases). ROP regressed after single IVB injection in 149 eyes (96.8%) and in 5 eyes (3.2%) after the second injection. Cataract developed in one eye (0.63%) after IVB injection. ROP regressed in 94.7% of treated eyes (76 eyes) in the laser photocoagulation group; however, retinal fold and traction developed in 2 eyes. Spherical and also cylindrical refractive errors had no significant difference.

Conclusions

Both IVB injection and laser photocoagulation are effective methods for the treatment of type 1 zone II ROP. However, re-treatment requirement may be higher in the IVB injection group. IVB re-injection is an effective option for re-treatment in persistent cases.

Clinical Evidence for Any Effect of Anesthesia on the Developing Brain

A recent U.S. Food and Drug Administration warning advised that prolonged or repeated exposure to general anesthetics may affect neurodevelopment in children. This warning is based on a wealth of preclinical animal studies and relatively few human studies. The human studies include a variety of different populations with several different outcome measures. Interpreting the results requires consideration of the outcome used, the power of the study, the length of exposure and the efforts to reduce the confounding effects of comorbidity and surgery. Most, but not all, of the large population-based studies find evidence for associations between surgery in early childhood and slightly worse subsequent academic achievement or increased risk for later diagnosis of a behavioral disability. In several studies, the amount of added risk is very small; however, there is some evidence for a greater association with multiple exposures. These results may be consistent with the preclinical data, but the possibility of confounding means the positive associations can only be regarded as weak evidence for causation. Finally, there is strong evidence that brief exposure is not associated with any long term risk in humans.

Cognition and behaviour in children with congenital abdominal wall defects

AIM

To characterise neurodevelopment at age two years and cognition and behaviour at age five years in children born with abdominal wall defects (gastroschisis or exomphalos).

STUDY DESIGN

Participants were treated as neonates for gastroschisis or exomphalos and invited for routine clinical follow-up at ages two and five years. Thirty-nine two year-olds and 20 five year-olds with gastroschisis and 20 two year-olds and 10 five year-olds with exomphalos returned for age-appropriate assessments of development (two years) and intellectual functioning (IQ), executive function, and behavioural problems. Results were compared with normative data from the tests and published data from local term-born children.

RESULTS

For both gastroschisis and exomphalos two year-olds, neurodevelopment was in line with the test normative data, but below the level of local normative data for all domains (effect sizes from -0.4 to -1.4 standard deviations). At five years, children with gastroschisis performed similarly to the normative mean for IQ but had high rates of various executive functioning problems on parent report (18-41% compared with 7% expected from norms). There was also a tendency for increased frequency of internalising problems (33% compared with normative expectation of 16%). Five year-olds with exomphalos also performed similarly to the normative mean for IQ and had low rates of executive and behavioural problems.

CONCLUSIONS

Survivors of gastroschisis and exomphalos may be at risk of poor neurodevelopment in toddlerhood, depending on the reference group, and children with gastroschisis may be particularly at risk for executive functioning difficulties despite an IQ within normal limits.

The effect of anaesthesia on the infant brain

Pre-clinical studies have consistently found that most general anaesthetics produce accelerated apoptosis in the developing brain. The effect has been seen in species ranging from the nematode to the non-human primate. A variety of other effects are also seen. There is also some evidence that animals exposed to anaesthesia are at increased risk of deficits in memory and learning. The effects are only seen with prolonged exposure. There are numerous problems in translating these findings to human clinical scenarios. Several human cohort studies have found an association between surgery in infancy and increased risk of poorer neurobehavioural outcome; however the possibility of confounding factors such as co-morbidity and surgery itself make it impossible to determine if these associations are due to anaesthesia toxicity. A recent trial and cohort studies suggest that an exposure of less than an hour does not increase the risk of poor outcome.

Developmental outcomes and physical activity behaviour in children post major surgery: an observational study

Background

Infants may be at neurodevelopmental risk from adverse events arising in the neonatal period. This study aimed to investigate the developmental outcomes and physical activity behaviours of term infants after neonatal major surgery, at age three years.

Methods

This prospective study enrolled infants who underwent major surgery in their first 90 days, between August 2006 and December 2008. Developmental status was assessed using the Bayley Scales of Infant and Toddler Development, Third Edition (BSID-III). Physical activity and sedentary behaviour (i.e. small screen recreation) (SSR) were assessed using the Preschool-Age Physical Activity Questionnaire (Pre-PAQ). Activity (moving between slow to fast pace) and SSR were reported for a 3-day period.

Results

One hundred and thirty five children (68 major surgery, 67 control) were assessed, using both measures, at age three years. Both groups were within the average range across all domains of the BSID-III although the surgical group was significantly below the controls for cognition (t = −3.162, p = 0.002) receptive language (t = −3.790, p < 0.001) and fine motor skills (t = −2.153, p = 0.03). Mean activity time for the surgical group was 191 mins.day⁻¹, and 185 mins.day-1 for controls. Mean SSR time was 77 mins.day⁻¹, and 83 mins.day⁻¹ for the respective groups. There was no significant difference between groups for either physical activity (p = 0.71) or SSR time (p = 0.49).

Conclusions

By age three, children who had major surgery in infancy are developmentally normal but have not quite caught up with their peer group in cognitive, receptive language and fine motor skill domains. Both groups met recommended 3 h of daily physical activity but exceeded 60-min SSR time recommended for preschool-age children.

Neurodevelopmental outcomes of tracheoesophageal fistulas

PURPOSE

The purpose of this study was to perform a retrospective review of tracheoesophageal fistula (TEF) patients who followed up in a state-sponsored program to assess neurodevelopmental outcomes.

METHODS

Records were reviewed retrospectively of children who underwent TEF repair between August 2001 and June 2014. Children discharged from the neonatal intensive care unit were referred to the state-sponsored Developmental Tracking Infant Progress Statewide (TIPS) program. We reviewed TIPS assessments performed before age 24months and noted referral for early school intervention services. Poor outcomes were defined as scores of "failure" on the screening assessment or referral for enrollment in early intervention services by 24months. Children with TEF were compared with case-matched nonsyndromic children of similar gestational age and birth weight.

RESULTS

Seventy-eight children underwent TEF repair. Thirty-eight followed up with TIPS. Survival was 93.6%. Predictors of hospital survival were Waterston classification (p=0.001), birth weight (p=0.027), and ventilator days (p=0.013). LOS was the only significant predictor of referral for early intervention services (p=0.0092) in multivariate analysis. There was a borderline significant difference in referral rate between children with TEF and controls. 52.6% of TEF patients were referred, while 34.2% of controls were referred (p=0.071).

CONCLUSION

More than half of TEF patients experience neurodevelopmental delays requiring referral for early intervention (53%).

Intravitreal anti-vascular endothelial growth factor treatment for retinopathy of prematurity: comparison between Ranibizumab and Bevacizumab

PURPOSE

To compare the effect and the treatment outcomes of bevacizumab and ranibizumab in the treatment of Type 1 retinopathy of prematurity (ROP).

METHODS

This was a bicentered retrospective case series performed at institutional referral centers. Seventy-two eyes of 37 patients who had intravitreal injections of either bevacizumab or ranibizumab as the primary treatment for Type 1 ROP were included. Outcomes' measures included regression and recurrence of ROP, the surgical complications, and refractive errors at a corrected age of 1 year.

RESULTS

All but one eye in the bevacizumab group had retinal neovascularization and plus disease regression after anti-vascular endothelium growth factor treatment. Neither recurrence of ROP nor major ocular complications, including cataract, retinal detachment, and endophthalmitis occurred in any of the treated eyes. There were no significant differences in mean refractive errors between the patients treated with intravitreal injections of bevacizumab or ranibizumab at the corrected age of 1 year. A significantly higher chance of high myopia was noted in the bevacizumab group (P = 0.03).

CONCLUSION

Both bevacizumab and ranibizumab showed similar efficacy in the regression of ROP with minor mean refractive errors at 1 year of corrected age. However, high myopia was more prevalent in the bevacizumab-treated eyes.

Impaired cognitive performance in premature newborns with two or more surgeries prior to term-equivalent age

BACKGROUND

Anesthesia in early childhood is associated with adverse neurodevelopmental outcome; however, it is not known if age at exposure affects the risk of adverse outcome. Our objective was to evaluate the association of the number and timing of anesthetic exposures for surgery with cognitive outcome in a cohort of premature newborns.

METHODS

A cohort study of exposure to anesthesia for surgery in premature newborns (<33 wk gestation) prospectively evaluated with neonatal magnetic resonance imaging (MRI) and neurodevelopmental testing at 3-6 y was employed. Exposure to anesthesia for surgery was classified as before term-equivalent age (TEA, <42 wk postmenstrual age) or after (≥42 wk). Multivariate regression was performed to analyze the association of composite IQ scores with the number of surgeries before and after TEA.

RESULTS

Among 137 newborns, 25 (18.2%) had one surgery before TEA and 18 (13.1%) had ≥2 surgeries. Two or more surgeries before TEA were associated with significantly reduced composite IQ scores at 4.6 ± 0.6 y after adjusting for gestational age and illness severity. Neither the number of surgeries after TEA nor sedation for MRI was associated with cognitive outcome.

CONCLUSIONS

More than one surgery prior to TEA is independently associated with impaired cognitive performance in premature newborns.

Non-operative advances: what has happened in the last 50 years in paediatric surgery?

Paediatric surgeons remain paediatric clinicians who have the unique skill set to treat children with surgical problems that may require operative intervention. Many of the advances in paediatric surgical care have occurred outside the operating theatre and have involved significant input from medical, nursing and allied health colleagues. The establishment of neonatal intensive care units, especially those focusing on the care of surgical infants, has greatly enhanced the survival rates and long-term outcomes of those infants with major congenital anomalies requiring surgical repair. Educational initiatives such as the advanced trauma life support and emergency management of severe burns courses have facilitated improved understanding and clinical care. Paediatric surgeons have led with the non-operative management of solid organ injury following blunt abdominal trauma. Nano-crystalline burn wound dressings have enabled a reduced frequency of painful dressing changes in addition to effective antimicrobial efficacy and enhanced burn wound healing. Burns care has evolved so that many children may now be treated almost exclusively in an ambulatory care setting or as day case-only patients, with novel technologies allowing accurate prediction of burn would outcome and planning of elective operative intervention to achieve burn wound closure.

Growth and developmental outcomes of infants with hirschsprung disease presenting in the neonatal period: a retrospective study

OBJECTIVES

To describe the presentation and progress over the first year of life of neonates with Hirschsprung disease, to describe their physical and developmental outcomes at 12 months of age, and to compare the outcomes of infants with short- vs long-segment Hirschsprung disease.

STUDY DESIGN

A retrospective study of neonates born with Hirschsprung disease in Western Australia between January 1, 2001, and December 31, 2010, to review their presentation, progress, growth, and development at 12 months of age.

RESULTS

Fifty-four infants were identified (40 with short and 11 with long segment and 3 with total colonic aganglionosis); 9 infants had a recognized syndrome and 1 infant died, unrelated to Hirschsprung disease. A primary pull-through procedure was performed in 97% and 21% of neonates with short- and non-short-segment Hirschsprung disease, respectively; 17 (31%) infants developed anal stenosis requiring dilatations. Enterocolitis occurred in 14 (26%) infants. Griffiths Mental Development Scale scores (1 year) were available in 31 of 45 nonsyndromic survivors: mean general quotient (94.2, SD 8.89) was significantly less than the population mean (P = .007), but the number of infants with developmental delay was within the expected range. Physical growth, except length, appeared adequate in nonsyndromic infants. There were no significant differences in the outcomes of infants with short- vs non-short-segment Hirschsprung disease.

CONCLUSIONS

At 1 year of age, many infants with Hirschsprung disease have ongoing gastrointestinal problems. Their overall growth appears satisfactory, and most infants are developing normally; however, their mean general quotient appears shifted to the left. Longer-term studies will better define developmental outcomes.

Combined use of neuraxial and general anesthesia during major abdominal procedures in neonates and infants

With the advent of ultrasound and improvements in equipment, the applications of regional anesthesia in the pediatric population have continued to expand. Although frequently used for postoperative analgesia or as a means of avoiding general anesthesia in patients with comorbid conditions, the adjunctive use of regional anesthesia during general anesthesia may effectively decrease the intraoperative requirements for intravenous and volatile agents, thereby providing a more rapid awakening and earlier tracheal extubation. More recently, the limitation of the requirements for volatile and other anesthetic agents may be desirable, given concerns regarding the potential impact of these agents on neurocognitive outcome in neonates and infants. Several authors have demonstrated the potential utility of combining a neuraxial technique (spinal or epidural anesthesia) with general anesthesia in neonates and infants undergoing intraabdominal procedures. We review the literature regarding the combined use of neuraxial and general anesthesia in neonates and infants during major abdominal surgery, discuss its potential applications in this population, and review the techniques of such practice.

Early developmental outcome following surgery for oesophageal atresia

AIM

To compare the developmental outcome of infants with oesophageal atresia with or without trachea-oesophageal fistula (OA/TOF) who underwent surgery in early infancy with healthy control infants in New South Wales, Australia.

METHODS

Infants diagnosed with OA/TOF requiring surgical intervention were enrolled prospectively between 1 August 2006 and the 31 December 2008. Healthy control infants were enrolled in the same time period. The children underwent a developmental assessment at 1 year of age (corrected) using the Bayley Scales of Infant and Toddler Development (Version III).

RESULTS

Of 34 infants with OA/TOF that were enrolled, 31 had developmental assessments. The majority (75%) were term infants (≥37 weeks gestation) with a mean birth weight of 2717 g. Fourteen infants (44%) had an associated birth defect and one infant with multiple associated anomalies subsequently died. Developmental assessments were also performed on 62 control infants matched for gestational age. Infants with OA/TOF had a mean score significantly lower on the expressive language subscale (P < 0.05) compared with the control infants.

CONCLUSIONS

This study found a lower than expected developmental score for infants following surgery for OA/TOF in the expressive language subscale compared with the healthy control infants. These findings support concerns over the potential impact of OA/TOF and its effects on development. Further studies, including continuing developmental review to determine whether these differences persist and their functional importance, should be performed.

Perinatal factors associated with poor neurocognitive outcome in early school age congenital diaphragmatic hernia survivors

OBJECTIVE

Determine predictors of neurocognitive outcome in early school age congenital diaphragmatic hernia (CDH) survivors.

STUDY DESIGN

Prospective study of infants with CDH at Duke University Medical Center. Neurocognitive delay (NCD) at school age (4 to 7years) was defined as a score<80 in any of the following areas: Verbal Scale IQ, Performance Scale IQ, Expressive Language, or Receptive Language. Logistic regression, Fisher's exact, and the Wilcoxon rank sum test were used to examine the relationship between NCD at early school age and 6 demographic and 18 medical variables.

RESULTS

Of 43 infants with CDH, twenty seven (63%) survived to hospital discharge, and 16 (59%) returned for school age testing at a median age of 4.9years. Seven (44%) of the children evaluated had NCD. Patch repair (p=0.01), extracorporeal membrane oxygenation (ECMO; p=0.02), days on ECMO (p=0.01), days of mechanical ventilation (p=0.049), and post-operative use of inhaled nitric oxide (p=0.02) were found to be associated with NCD at early school age.

CONCLUSIONS

CDH survivors are at risk for neurocognitive delay persisting into school age. Perinatal factors such as patch repair and ECMO treatment may aid in identifying CDH survivors at high risk for continued learning difficulties throughout childhood.

Effect of general anesthetics on the developing brain

Studies on rodents and subhuman primates suggest that prolonged exposure to general anesthetics may induce widespread neuronal cell death and neurological sequelae; seriously questioning the safety of pediatric anesthesia. This review presents recent developments in this rapidly emerging field. There is mounting and convincing preclinical evidence in rodents and nonhuman primates that anesthetics in common clinical use are neurotoxic to the developing brain in vitro and cause long-term neurobehavioral abnormalities in vivo. Prior to the publication of animal data and after the publication of animal data, there are several human cohort studies that demonstrate the association of poor neurodevelopmental outcome in neonates, who underwent major surgery during their neonatal period. This review summarizes our present understanding of some of the key components responsible for anesthesia-induced neuroapoptosis and offers some of neuroprotective strategies that could be beneficial as adjunct therapy in preventing anesthesia-induced death of developing neurons in the neonates. A randomized literature search was carried out using search words apoptosis, general anesthetics, and developing brain from 1979 to 2011 for effects of general anesthetics on developing brain in PUBMED and relevant published literature reviewed. General anesthetics may produce neurotoxicity and enduring cognitive impairment in young and aged animals, but the issue has not been adequately studied in humans. It is premature to recommend a change clinical practice based on the present data.

Early developmental outcomes following major noncardiac and cardiac surgery in term infants: a population-based study

OBJECTIVE

To ascertain developmental differences between term infants after major noncardiac surgery and cardiac surgery compared with healthy control infants in New South Wales, Australia.

STUDY DESIGN

This prospective population-based cohort study enrolled infants between August 1, 2006, and December 31, 2008, who required major noncardiac surgery within the first 90 days of life. Developmental outcomes were compared in these children, cohorts of term infants requiring cardiac surgery, and healthy controls. Infants were assessed at 1 year of age using the Bayley Scales of Infant and Toddler Development, Third Edition (BSID-III).

RESULTS

Of the 784 infants enrolled, 688 (90.2%) of infants alive at 1 year were assessed. Of these, 539 infants were term and were included in the present analysis. Compared with controls, the infants who underwent cardiac surgery had significantly lower (P < .001) mean scores in all 5 BSID-III subscales, and the infants who underwent noncardiac surgery had significantly lower (P < .05) mean scores in 4 of the 5 BSID-III subscales. The greatest difference was in the incidence of gross motor delay in both the cardiac surgery group (OR, 0.25; 95% CI, 0.16-0.41) and the noncardiac surgery group (OR, 0.41; 95% CI, 0.26-0.63).

CONCLUSION

This unique population-based prospective study compared the developmental outcomes of infants who underwent major noncardiac surgery and cardiac surgery. Major surgery in infants was found to be significantly associated with developmental delay at 1 year of age compared with control infants. These data have important implications for interventions and clinical review in the first year of life.

Which high-risk infants should we follow-up and how should we do it?

Early detection of neurodevelopmental delay and appropriate intervention has been associated with improved academic and social outcomes. Identifying those who are at high risk and might benefit is not straightforward. Approximately 2% of infants are admitted to a neonatal intensive care unit after birth and these babies are known to be at high risk of developmental impairment. While it is well recognised that the extreme preterm infant is at high risk of developmental impairment, there is increasing evidence of a risk in late preterm infants as well as those undergoing major cardiac and non-cardiac surgery. Not all infants are enrolled in multidisciplinary follow-up clinics with easy access to early intervention. These clinics are expensive to run with both limited and conflicting data on their long-term value. This review will concentrate on identifying which infants are at risk, reviewing the aetiology of the risk factors and the efficacy of follow-up clinics.

Validity of the fine motor area of the 12-month ages and stages questionnaire in infants following major surgery

The Ages and Stages Questionnaires (ASQ) are parent-report screening tools to identify infants at risk of developmental difficulties. The purpose of this study was to examine validity and internal reliability of the fine motor developmental area of the ASQ, 2nd edition (ASQ2-FM) for screening 12-month-old infants following major surgery. The ASQ2-FM was completed by caregivers of 74 infants who had cardiac surgery in the first 90 days of life, 104 infants who had noncardiac surgery in the first 90 days of life, and a control group of 154 infants. The Rasch item response analysis revealed that the ASQ2-FM had poor ability to discriminate among levels of fine motor ability. Sensitivity was poor (20%) and specificity was good (98%) when compared with the scores for the fine motor subscale of the Bayley Scales of Infant and Toddler Development. The ASQ2-FM under-identified infants at risk for fine motor delay; internal reliability and construct validity do not support use as a screening tool of fine motor development of infants aged 12 months who have undergone major surgery.

Challenges in conducting prospective research of developmentally directed care in surgical neonates: a case study

BACKGROUND

Evaluation is fundamental to evidence-based practice. Due to practical constraints inherent in real-world clinical environments, however, innovations in clinical practice are often implemented without rigorous research. We set out to evaluate the effectiveness of developmentally directed care in surgical neonates using a randomised controlled trial with a Newborn Individualized Care and Assessment Program (NIDCAP) intervention.

AIM

The aim of this paper is to inform future studies by sharing lessons learnt in conducting prospective research of a practice-intervention in a critical care setting.

METHOD

Three intervention components were used to assess implementation: number of NIDCAP observations; infant allocation to project nurses, and consistency of care. Barriers to implementation were identified through discussions with nurses who had key roles.

RESULTS

Insufficient episodes of NIDCAP observation and infant allocation to project nurses, and lack of consistency of care indicated that the intervention had not been successfully implemented. Barriers to implementation (fast 'turnover' of patients, unpredictable changes in medical status, staff/skill shortages, and inconsistent care) were attributed to the competing demands between service provision and research in a busy critical care context.

CONCLUSIONS

The findings regarding barriers to successful implementation of NIDCAP in this case study are relevant to any critical care setting where complex interventions are under consideration, as similar challenges are plausible across a range of clinical contexts. Adopting a critical methodologically-informed approach to appraise implementation and evaluate complex interventions is essential.

Oral feeding outcomes in neonates with congenital cardiac disease undergoing cardiac surgery

BACKGROUND

Achievement of adequate oral nutrition is a challenging task after early neonatal cardiac surgery. This study aims to describe predictors of oral feeding outcomes for neonates after early surgical interventions.

MATERIALS AND METHODS

A retrospective review of neonates admitted with congenital cardiac disease over a period of 1 year. We analysed predictors of the need for a feeding tube at discharge and the amount taken at each feeding. Multilevel modelling was used to look at individual change over time predicting oral amount at each feeding.

RESULTS

We identified 56 neonates. Diagnoses were heterogeneous; 23% of the infants had associated genetic syndromes and 45% required pre-operative mechanical ventilation. The median time from birth to surgery was 8.4 days, with 29 infants fed orally before surgery. The mean time from surgery to first oral feeding attempt was 12 hours. Time from surgery to oral feeding, the amount taken with first feeding, and cross-clamp times were significant predictors of oral feeding success, whereas the presence of a comorbidity--genetic abnormality--and longer ventilator dependency predicted failure. Almost half of the neonates required a feeding tube upon discharge, and no infant discharged was solely breastfed. Discharge with a feeding tube was associated with greater weight gain at that time.

CONCLUSIONS

Neonates with congenital cardiac disease face significant barriers to successfully achieving oral feeding on hospital discharge. Enteral feeding guidelines focus on physiological stabilisation and do not always address the developmental milestones necessary to support oral feeding. Future prospective studies are necessary to identify multimodal strategies to optimise early feeding.

Developmental outcomes following major surgery: what does the literature say?

Relative to the wealth of information in the medical literature regarding developmental outcome for infants who have had cardiac surgery available, few studies specifically detail how those who have undergone major surgery grow and develop. The few published studies tend to be disease specific, making their results difficult to translate to a more general setting. As mortality for most infants who require surgery in infancy continues to decrease, the focus for researchers and clinicians should be on how these children will grow and develop. As parents realise that their infant will survive, this becomes their next major concern. The most common conditions requiring early major surgery have been reviewed in relation to data on infant developmental outcomes.

Anesthesia and neurotoxicity to the developing brain: the clinical relevance

Laboratory work has confirmed that general anesthetics cause increased neuronal apoptosis and changes to the morphology of dendritic spines in the developing brains of animals. It is an effect seen with most volatile anesthetics as well as with ketamine and propofol. The effects are dose dependent and seen over particular periods of early development. There is some evidence that rodents exposed to anesthesia during infancy have delayed neurobehavioral development. There are inherent limitations in translating the preclinical data to human practice but the data cannot be ignored. Some human clinical studies have found evidence for an association between major surgery and changes in neurobehavioral outcome, although the evidence is less clear for minor surgery. These associations are certainly at least partly because of factors apart from anesthesia, such as coexisting pathology or the effect of surgery itself. Other clinical studies have found no evidence for an association between surgery and outcome. These studies are also not without limitations. Thus it remains unclear what role anesthesia exposure in infancy actually plays in determining neurobehavioral outcome. To date studies can neither confirm that anesthesia plays a role nor rule it out.

Early development of children with major birth defects requiring newborn surgery

AIM

To describe neurodevelopmental outcomes of neonates following cardiac or non-cardiac surgery for major birth defects.

METHODS

From 1 June 2002 to 31 July 2004, infants born ≥ 33 weeks gestation who underwent major birth defect surgery were enrolled prospectively. Infants were assessed at a mean corrected age of 24 months (standard deviation (SD) = 8 months, range 18-36 months) using the Bayley Scales of Infant Development: Second Edition.

RESULTS

Of the 118 study infants, 79 (66%) were male, the mean gestation was 38.5 weeks (SD 1.9 weeks) and mean birthweight was 3194 g (SD 653 g). Forty-five infants (47%) had undergone general surgery for non-cardiac defects. The majority of infants (73%) performed below average in cognitive and language skills. Mental delay was found in 41% of infants; 16% were significantly delayed. Fine and gross motor skills were below average in 60% of infants. Twenty-six percent of infants had motor delay; 9% were significantly delayed. Both the mean Mental Development Index (M = 88, SD = 19.8) and mean Psychomotor Development Index (M = 93, SD = 19.3) were significantly below the normative mean (d = 0.8, P < 0.001 and d = 0.5, P < 0.001, respectively). One in five children had global developmental delay. There was no significant difference in outcome between the cardiac and general surgery groups.

CONCLUSIONS

The majority of infants performed below average on a standardised test of infant development. Our results show that infants requiring newborn surgery for major birth defects are at high risk of adverse neurodevelopmental outcomes. We recommend that follow-up programmes include systematic multidisciplinary developmental monitoring and early intervention.

Mother-child interaction and child developmental capacities in toddlers with major birth defects requiring newborn surgery

BACKGROUND

Evidence exists of the important role of the mother-child relationship in child development, yet with the exception of prematurity, little is known of the impact of biologic risk on this relationship.

AIMS

We investigated the quality of the mother-child interaction in association with early development in toddlers who had newborn surgery for major birth defects.

METHODS

Ninety-three toddlers (Mean age=24.7 months, SD=4.6) requiring newborn surgery for major birth defects, underwent developmental testing and participated in a videotaped free play interaction with their mothers. Interactions were rated using the National Institute of Child Health and Human Development schema. Interaction ratings were compared with normative data and within group differences were also examined in relation to child developmental status.

RESULTS

Overall mean interaction ratings were suboptimal and significantly different from normative data; with the exception of child negative mood. Forty-one children (44%) had developmental delay. Mother and child interactive behaviour ratings were consolidated into three factors (Maternal Responsivity, Maternal Intrusiveness, and Child Positive Interactivity) for multivariate analyses. Compared to children developing normally, those with developmental delay showed significantly less positive interactivity and had mothers who were less responsive and more intrusive. Child behaviour with the tester was related to child behaviour with the mother.

CONCLUSION

Quality of mother-child interaction is nonoptimal in children with major birth defects requiring newborn surgery. Mothers of infants with developmental delay are most at risk of interaction difficulties and may benefit from early identification and timely intervention.

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.

Neurodevelopmental outcomes of congenital diaphragmatic hernia survivors followed in a multidisciplinary clinic at ages 1 and 3

PURPOSE

Infants who survive congenital diaphragmatic hernia (CDH) repair may have ongoing medical and neurodevelopmental morbidity after hospital discharge. We evaluated the relationship between medical and neurodevelopmental outcomes of CDH survivors seen in a multidisciplinary clinic at ages 1 and/or 3.

METHODS

From January 1997 to December 2004, 69 (61%) of 112 CDH survivors were followed in our CDH clinic at ages 1 and/or 3. Medical issues (cardiac, pulmonary, gastrointestinal) were tabulated at hospital discharge and at follow-up. Neurodevelopmental data were obtained from clinic assessments by a neurodevelopmental pediatrician. Descriptive results were summarized for each cohort. Multivariate analyses were performed to identify predictors of motor problems at age 1.

RESULTS

Of the 69 study participants, 64% were male, 75% had left-sided CDH, 17% had cardiac anomalies, and 25% had other congenital malformations. Nearly all required ventilator management (99%) with a median ventilator time of 14 days (range, 1-54 days); 30% required extracorporeal membrane oxygenation. While 87% of patients had medical issues at hospital discharge, 61% and 67% had medical issues at ages 1 and 3, respectively. Pulmonary problems were noted in 34% and 33% of the ages 1 and 3 cohorts, respectively. Motor and language problems were detected in 60% and 18% of the age 1 cohort and 73% and 60% of the age 3 cohort, respectively. Multivariate analysis found ventilator time as the only independent predictor of motor problems at age 1 (odds ratio, 1.12 per day; 95% confidence interval, 1.05-1.20; P < .01).

CONCLUSIONS

Young CDH survivors continue to have ongoing medical problems and a high incidence of motor and language problems. Duration of neonatal ventilatory support was a significant predictor of motor problems at age 1. Prospective studies are needed to confirm these findings.