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Contents lists available at ScienceDirect

Paediatric Respiratory Reviews

Mini-symposium: Esophageal Atresia and Tracheoesophageal

Motility, digestive and nutritional problems in Esophageal Atresia

Madeleine Gottrand, Laurent Michaud, Rony Sfeir, Fre´de´ric Gottrand *

CHU Lille, University Lille, National reference center for congenital malformation of the , Department of Pediatrics, F-59000 Lille, France

EDUCATIONAL AIMS

The reader will come to appreciate that:

 Digestive and nutritional problems are frequent and interlinked in esophageal atresia.

 A multidisciplinary approach is needed in esophageal atresia.

 Esophageal atresia is not only a surgical neonatal problem but has lifelong consequences for digestive and nutritional

morbidity.

A R T I C L E I N F O S U M M A R Y

Keywords:

Esophageal atresia (EA) with or without tracheoesophageal fistula (TEF) is a rare congenital

Anastomotic stricture

malformation. Digestive and nutritional problems remain frequent in children with EA both in early

Growth Retardation

infancy and at long-term follow-up. These patients are at major risk of presenting with gastroesophageal

Dysphagia

reflux and its complications, such as anastomotic strictures. Esophageal dysmotility is constant, and can

Gastro-Esophageal Reflux

Dysmotility have important consequences on feeding and nutritional status. Patients with EA need a systematic

Nutrition follow-up with a multidisciplinary team.

Children ß 2015 Elsevier Ltd. All rights reserved.

Esophageal atresia (EA) with or without tracheoesophageal Anastomotic stricture

fistula (TEF) is a rare congenital malformation [1,2]. The live-birth

prevalence of EA is 1.8 per 10 000 births in France [3]. The prognosis An astomotic stricture [AS] may arise because of important

of EA has benefited from advances in medical care, including anastomotic tension related to a long-gap between the two

neonatal and surgical procedures, and has therefore improved esophageal pouches, occurrence of a post-operative anastomotic

significantly over the past three decades. Its survival rate now leak and GER [18].

exceeds 95% and an increasing number of patients reach adulthood

[2,3]. However, digestive/nutritional problems remain frequent in

this population both in early infancy and at long-term follow-up [4]. Dysmotility

Dysmotility is not only a consequence of surgical repair as

WHY ARE DIGESTIVE, MOTILITY AND NUTRITIONAL PROBLEMS

abnormal innervation is present at birth. It involves the Auerbach

A CONCERN IN PATIENTS WITH EA?

plexus, ganglion cells, interstitial cells of Cajal (ICC), and both

excitatory and inhibitory intramural nerves mostly in the distal

Gastro-esophageal reflux (GER)

esophageal segment rather than in the proximal esophagus [19–

22]. Dysmotility is explained by an imbalance of neurotransmitter

Patients with EA are at major risk of having GER [5]. Several

excretion in nerve cells with decreased expression of neuronal

factors contribute to the physiopathology of GER in EA (Table 1).

markers, including vasoactive intestinal polypeptide (VIP) and

nitric oxide synthase (NOS) [19,20]. These congenital changes in

* Corresponding author. Tel.: +333 20 44 61 26; fax: +333 20 44 61 34. the innervation may lead to abnormal contraction and relaxation

E-mail addresses: [email protected] (M. Gottrand), and subsequent , GER, and feeding difficulty in children

[email protected] (L. Michaud), [email protected] (R. Sfeir),

with EA [23]. [email protected] (F. Gottrand).

http://dx.doi.org/10.1016/j.prrv.2015.11.005

1526-0542/ß 2015 Elsevier Ltd. All rights reserved.

Please cite this article in press as: Gottrand M, et al. Motility, digestive and nutritional problems in Esophageal Atresia. Paediatr. Respir.

Rev. (2015), http://dx.doi.org/10.1016/j.prrv.2015.11.005

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Table 1

Mechanisms of gastro esophageal reflux in esophageal atresia

Causes Mechanisms References

Excessive tension at the esophageal anastomosis - Decrease in lower sphincter tone [6,7] (Yanchar 2001, Montedonico 1999)

- Shortening of the intra-abdominal esophageal

segment

- Deformity of the cardioesophageal junction

Abnormal esophageal motility - Reduction of esophageal clearance [8–10] (Kawahara 2007, Van Wijk 2013,

- Longer acid and bolus clearing times Catalano 2011)

- Transient lower esophageal sphincter relaxation

Slow gastric emptying (controversial) - Congenital [5,11–13] (Jolley 1980, Lopes 2007,

- Surgically induced vagal nerve injury Romeo 2000, Montgomery 1998)

Abnormal gastric myoelectrical activity (minor role) - Disturbed neuromuscular function [12,14,15] (Yagi 1997, Bokay 2005,

- Antral hypomotility Romeo 2000)

Gastrostomy as an aggravating role (controversial) - Gastrostomy can worsen GER [16,17] (Black 1991, Shah 2015)

- Long-gap EA worsens GER and

- Long-gap EA often necessitate gastrostomy

(selection bias)

Nutritional problems prevalence of GER increased gradually from 16% at age 6 months to

51% at age of 5 years, while 44% of children still had GER at the age

Dysphagia is one of the main causes of nutritional problems. of 10 years [41]. Nonetheless, after 3 years of age, new cases of GER

Causes of dysphagia include esophagitis, GER, eosinophilic are rare and most of the patients presenting with GER are

esophagitis, dysmotility, anastomotic strictures, esophageal outlet symptomatic [41].

obstruction, aspiration and fear of feeding. Predictors of poor oral 24 hour esophageal pH-metry remains the gold standard for

intake are long gap atresia, CHARGE association, and neurologic the diagnosis of GER [46]. Koivusalo et al. suggested that early

abnormalities [24]. GER and esophagitis have been implicated as esophageal pH-metry (i.e before the age of 6 months) has a good

causes of feeding difficulties. However, motility abnormalities may specificity and positive predictive value for the outcome of EA

contribute to a much greater extent to dysphagia. Anastomotic associated GER but is not a good predictor of unfavorable GER or

strictures are another frequent cause of dysphagia and feeding need for anti-reflux surgery [38]. Specific normal values for

difficulties. esophageal pH-metry are not available in EA patients, but reflux

Fundoplication, which can create a functional esophageal outlet index, total number of reflux periods with pH<4 and numbers of

obstruction in the context of dysmotility, may also cause or periods of pH<4 lasting more than 5 minutes are very similar in EA

aggravate dysphagia and feeding difficulties. This is supported by a patients to those in normal infants of the same age [47,48]. A

study of children receiving a fundoplication, where 4.3% of the systematic esophageal pH-metry screening for GER by 9-12

cohort without EA presented with dysphagia, versus 17% in months of age is recommended.

children with EA [25]. Esophageal pH-impedance monitoring is a more recent

Aspiration is an under-recognized cause of feeding difficulty in technique that presents advantages compared to isolated esoph-

children with EA. Any respiratory symptom during feeding, ageal pH-metry. It allows the evaluation of retrograde bolus

including tachypnea, wheezing, and cough may compromise movements in the esophagus independent of the pH, identifying

feeding especially in infants [26–28]. non acidic reflux also in the postprandial period and in patients

Finally, EA patients may develop a fear of eating or texture receiving acid-suppressing therapy. It is a dynamic technique and,

aversions related to a history of food impaction [29]. therefore, can detect the direction of the flow, so that reflux can be

All these mechanisms are often associated and contribute to distinguished from swallowed oropharyngeal contents. Moreover,

reduced energy intake which leads to under-nutrition and growth it can accurately determine the height of the reflux and reflux-

failure. related symptoms. Combined with pH monitoring, it can distin-

guish between acidic and non-acidic reflux episodes [10]. However,

THE PREVALENCE AND HOW TO EXPLORE DIGESTIVE, MOTILITY the technique still has limitations: high cost, limited added value

AND NUTRITIONAL PROBLEMS IN PATIENTS WITH EA (TABLE 2) regarding therapeutic implications, and lack of evidence-based

parameters for the assessment of gastroesophageal reflux and

GER symptom association in children [49]. Experience of esophageal

pH-impedancemetry is increasing in EA patients [9,10,17,44,50,51]

GER is frequent in patients with EA, especially in isolated forms, and has demonstrated that reflux events are mainly non acidic

where it is reported in almost all the patients and often requires (62.7% of reflux episodes), and that mean acid clearing time and

fundoplication [30]. Depending on age, patient selection and mean bolus clearing time were significantly longer in EA patients

diagnostic methods, the prevalence of GER in patients with EA

varies from 20% to 63% [4,6,10,17,31–45]. GER can persist lifelong.

Complications such as late or recurrent anastomotic stenosis, Table 2

esophagitis and Barrett’s Esophagus (BE) can be observed during Frequency and age of complications of esophageal atresia

childhood, adolescence and adulthood (Table 3). There are few

Complications Frequency Age

longitudinal studies of the natural history of Gastro-esophageal

- GER - 20-63% - 1-10 years

Reflux in the EA population, and as a result the risk of recurrence of

- Peptic esophagitis - 9-53% - 3-5 years

GER has not been accurately assessed. GER appears to be

- Barrett esophagus - 1-2% - Adolescence,

particularly frequent during the first months of life, but especially adulthood

within the first 5 years in type C EA patients [the most common - Dysphagia - 61% - 5 years

- Anastomotic stricture - 18-60% - 1 year

type of TEF]. Koivusalo longitudinally assessed GER with esoph-

- Growth retardation, under-nutrition - 30% - 5 years

ageal pH-metry and histology in 61 children and showed that the

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Table 3

screening for anastomotic stenosis has been advocated by some

Complications of gastro esophageal reflux over time

authors starting 1 month after surgery [59,62], while the majority

Time of occurrence Complication Frequency recommend to wait for clinical signs suggestive of esophageal

stenosis [54,56,57].

Short term Laryngomalacia aggravation

Anastomotic stenosis 18-60%

Peptic esophagitis 9-53% Dysmotility

Feeding difficulties 6-11%

Middle term Recurrent anastomotic stenosis 6%

Dysphagia is a common complaint occurring in 22-48% of older

Bronchial hyperreactivity

children and adults with EA [11,36,63]. Esophageal motility can be

Long term Barrett esophagus 5-36%

Esophageal adenocarcinoma (3 cases reported) assessed by a contrast study, esophageal manometry (water

perfused or more recently high resolution) or video manometry. All

studies suggested one can ascertain the degree of dysmotility;

rating it as mild, moderate or severe esophageal dysmotility

compared to controls, adding to the understanding of the [64]. With manometry, the patterns of esophageal dysmotility

pathophysiology of GER in this population [9,10,50]. On rare include 3 types: pressurization 15%, distal contraction 50% and

occasions, such as in infants presenting with dying/cyanotic spells aperistalsis 35%. Consistently, the pattern of esophageal dysmo-

or those found to have a direct time-related event with non-acidic tility is not predictive of the presence or severity of dysphagia [65]

reflux (using a score), pH-impedancemetry can be helpful when nor the outcome of fundoplication. There is currently no evidence

considering the indication for fundoplication. Thus, it is a for the benefit of using esophageal manometry to direct medical

convenient technique in research for the evaluation of new drugs management.

and for the study of swallowing abnormalities [9,10,51]. An upper gastro intestinal contrast study is predictive of

There are no studies assessing the benefit of routine upper delayed esophageal emptying and dysmotility. When performed,

gastrointestinal endoscopy in the follow-up of patients with EA. an upper gastrointestinal contrast series allows for early detection

Eighty percent of grade C or D EA patients present with either of dysmotility, and can differentiate degrees of severity [31].

moderate or severe esophagitis or gastric metaplasia at any time in

follow-up, but the risk of occurrence is maximal during the first Nutritional problems

3 to 5 years of life. The risk of having unfavorable histology after

6 years of repeated normal biopsies is very low [42,43]. Endoscopic The reported rates of feeding abnormalities varies from 6% to

esophageal mucosal abnormalities can be observed in patients 11% [24,29,66]. After solid food introduction in the diet, the

with EA despite the absence of symptoms. following food difficulties have been observed: slow to feed (52%),

When performed, upper gastrointestinal endoscopy should cough or choking with feeds (32%), vomiting with feeds (16%) [67],

carefully examine the upper part of the esophagus (inlet patch is food refusal (16%) or dysphagia (61%) [4]. Children with EA have a

more frequent in this population [52]), esogastric junction and significant reduction of height and weight (mean height z score -

anastomosis area. In addition, the endoscopist should look for 1.78Æ1.7) and mean weight for height (-1.1Æ0.9). Only 7% of patients

th

stenosis, a diverticulum or fistula, , and peptic or with EA are less than the 5 percentile for height and weight and low

eosinophilic esophagitis. In any case, when an endoscopy is birth weight is predictor of a smaller size [37].

performed and even when it appears macroscopically normal, at Initial evaluation of dysphagia includes an endoscopy to

least 4 biopsies, in quadrants, one centimeter above the Z line and evaluate the anastomotic site and esophageal inflammation

one biopsy in the middle part of the esophagus are recommended contributing to symptoms. There is a poor correlation with the

for Barrett and eosinophilic esophagitis screening. The number of symptom of dysphagia and inflammation. It has been reported that

biopsies should be increased in the presence of macroscopic 38% of patients with normal esophageal biopsies have food

abnormalities. GER can remain asymptomatic, and several studies impactions and only 32% of patients with endoscopic inflammation

have shown the absence of correlation between clinical signs and have food impactions [42].

complications of GER (mainly esophagitis) in this population

[17,35,36,42,43]. TREATMENT AND FOLLOW-UP

In children who underwent a fundoplication, repeated system-

atic endoscopy is recommended, as recurrence of GER and peptic Gastro-esophageal Reflux

esophagitis or Barrett’s Esophagus are possible for these patients

[25,30,53]. GER is frequent during infancy and complications due to GER

are observed mostly during the first 2 years of life [42]. Most of the

Anastomotic stricture complications due to GER in EA are linked to acid reflux (ie

esophagitis, refusal to eat, anastomotic stenosis) rather than non-

AS is the most frequent post-operative complication occurring acidic reflux. Medical management of GER by whatever the agent

in 18% to 60% of patients with EA [18,54–57]. Clinical signs include used (mainly proton pump inhibitor (PPI) and H2 receptor

dysphagia, vomiting, cough, recurrent respiratory infections and antagonists) is successful by reducing gastro-intestinal symptoms,

poor weight gain [56,58]. A history of an esophageal foreign body respiratory symptoms or showing an improved weight gain

in a young child with EA [usually retained food such as chicken] is [68]. There are no efficient pro-kinetics currently available.

highly suggestive of an AS. There is no evidence to justify increasing systematically the

AS is diagnosed by a contrast X-ray or endoscopy. Although no dosage of PPI in EA: neither evidence of abnormal high acidic

consensus definition of AS exists, it is defined by a reduction of secretion in this condition, nor resistance to PPI reported.

esophageal diameter compared to an age-related normal esopha- Esophagitis seems more frequent in EA patients and is the

gus with associated symptoms. Stricture index (SI) can be leading cause of Barrett’s Esophagus, which is a premalignant

calculated with the formula SI= (D-d)/D, in which ‘‘D’’ is the lesion that can be prevented by PPI [69]. Long-term treatment with

largest diameter of the esophagus closed from the stricture and ‘‘d’’ PPI might expose the patient to adverse events although this has

is the stricture diameter. SI has been used to assess the degree of been poorly studied in children. Long term PPI treatment is not

the stricture at contrast X-Ray [59,60] or at endoscopy [61]. Routine generally recommended in the pediatric population. Therefore, the

Please cite this article in press as: Gottrand M, et al. Motility, digestive and nutritional problems in Esophageal Atresia. Paediatr. Respir.

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4 M. Gottrand et al. / Paediatric Respiratory Reviews xxx (2015) xxx–xxx

benefit/risk of long term PPI treatment should be balanced in this semi-rigid dilators (as Savary-Giliard bougies) or balloons. There is

population and the need for prolonged treatment reassessed on a no consensus about the optimal diameter and frequency of the

regular basis. dilations [59,75]. Dilations sessions are usually repeated every 1 to

Indications for fundoplication vary widely from one center to 2 weeks until a stable diameter is obtained [59,75] or resolution of

another. Cumulative risk to have a fundoplication performed in EA the symptoms is achieved [54,61]. Anastomotic stricture (AS)

patients is up to 45%. In the literature, indications may include resection and re-anastomosis or partial or total esophageal

failure of maximum conservative therapy for GER and/or substitution is reserved for conservative management failures.

esophagitis, an apparent life-threatening event, recurrent anasto- Recurrent AS is defined as reappearance of symptoms, 3 or more

motic stenosis, fistula recanalization and failure to thrive times, more than 30 days after last dilation [75]. Experimental data

[37,68,70]. In long gap EA, GER seems particularly frequent and as well as clinical experience suggest that GER is the major cause of

is associated with a higher risk of anastomotic stenosis, suggesting recurrent anastomotic stenosis [76,77] and in these cases

that fundoplication should be proposed for a large proportion of fundoplication has to be considered [18]. Recurrent AS can also

those children. The timing of fundoplication varies from one center be treated by steroid stricture injection [78–81], topical applica-

to another but is often performed during early childhood, between tion of the anti-fibroblastic agent mitomycine C [82] (Figure 1) and

1 and 24 months after the atresia repair [70]. However, performing stents [83–86].

a fundoplication early in life exposes the child to a higher risk of

failure [71]. Dysmotility

In highly selected cases, when severe reflux persists despite

fundoplication, or after repair of a tracheoesophageal cleft, or in Intrinsic abnormal motility of the esophagus is a constant

severe microgastry, total gastric dissociation could be considered feature in EA where pro-kinetics are unlikely to be as efficient as in

[72]. However, long term complications including dumping a child with normal esophageal motility [87]. Therefore, due to

syndrome, nutritional deficiency and growth failure, long term their potential side effects and lack of efficiency, the use of pro-

dependency to enteral feeding, Barrett’s Esophagus and eso- kinetics is not recommended in EA patients. There is no current

phago-jejunal anastomosis stenosis have been recently reported specific drug option to treat dysmotility.

[73,74].

Due to the high frequency of GER in infancy and risk of Nutritional problems

complications, there is a general recommendation to systemati-

cally treat all EA patients with PPI during the first months of life. An Aggressive pulmonary toileting, early treatment of infections,

esophageal pH-metry after stopping PPI is recommended at that and use of inhaled medications are all critical to maintain lung

time. Long-term regular endoscopic follow-up of EA patients is also health and reduce the risk of feeding difficulties.

recommended. Careful nutritional follow-up is required and relies on growth

and height charts. Several measures can be combined to prevent

Anastomotic stricture or treat under-nutrition: individually adapted food consistency

and timing of introducing solid foods, oral rehabilitation with

Conservative treatment consists of intraluminal dilations, to help of a speech therapist and psychologist, nutritional comple-

obtain a stable esophageal diameter that allows normal eating and ments, even enteral nutrition via a gastrostomy or via a naso-

disappearance of symptoms. Dilations can be done either using gastric tube.

Figure 1. Left: Recurrent anastomotic stenosis in a 15 months old patient with esophageal atresia (arrow) Right: Upper GI series 3 years after one application of mitomycine C

showing the absence of stenosis.

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Rev. (2015), http://dx.doi.org/10.1016/j.prrv.2015.11.005