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Where is the orogastric tube going in this preterm neonate?
  1. Bárbara Marques1,
  2. Ana Teresa Sequeira1,
  3. Mariana Lemos2 and
  4. Margarida Abrantes3
  1. 1 Pediatric Service, Department of Pediatrics, Academic Medical Center of Lisbon, Hospital Santa Maria-CHLN, Lisbon, Portugal
  2. 2 Pediatric Cardiology Service, Hospital Santa Cruz, Centro Hospitalar Lisboa Ocidental, Carnaxide, Portugal
  3. 3 Service of Neonatology, Department of Pediatrics, Academic Medical Center of Lisbon, Hospital Santa Maria- CHLN, Lisbon, Portugal
  1. Correspondence to Dr Bárbara Marques, barbaralsmarques{at}hotmail.com

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Description 

A male preterm neonate was born at 27 weeks of gestation by emergency caesarean section due to severe maternal pre-eclampsia, weighing 960 g. Apgar scores were 8/9. Pulmonary surfactant was administrated after endotracheal intubation due to increased need for oxygen. He was transferred to the Neonatal Intensive Care Unit under mechanical ventilation. An orogastric tube was placed and chest radiography performed. A left-sided pneumothorax was identified, but the orogastric tube was not visualised (figure 1), so it was replaced. The radiography was immediately repeated showing an abnormal position of the tube along the left hemithorax (figure 2) without pneumothorax. The neonate remained stable. Oesophageal perforation (OP) was assumed and the tube was immediately removed. Additionally, broad-spectrum antibiotic therapy with meropenem and vancomycin, total parental feeding and proximal oroesophageal suction were started. At 11 hours of life, he suffered clinical deterioration with increased oxygen requirement, respiratory distress and haemodynamic instability. Chest radiography showed left pneumothorax and pneumomediastinum (figure 3). Thoracic drainage was performed, and chest drain was removed on day 8 of life. On day 24, we performed an esophagography which showed an intact oesophagus with no contrast leak, and enteral feeding was started. He was discharged home by day 65 of life.

Figure 1

First radiograph after orogastric tube placement, which was not visualised, showing a left-sided pneumothorax.

Figure 2

Abnormal position of the orogastric tube along the left hemithorax, without pneumothorax, 5 min after the first radiography.

Figure 3

Large left-side pneumothorax and pneumomediastinum.

OP in neonates is usually iatrogenic and commonly associated with placement of enterogastric tubes, endotracheal intubation and nasotracheal suctioning.1 2 Although rare, it is more common in infants weighing less than 750 g and is associated with high mortality (21%–30%), although most deaths are related to complications of prematurity.3

The most frequent location of OP in neonates is the pharyngoesophageal junction as it is the narrowest point in the oesophagus and instrumentation leads to a reflex muscular constriction. Also, neck hyperextension during intubation attempts leads to compression of the oesophageal wall against the cervical spine with risk of perforation.2

OP should be suspected in a neonate with sialorrhea, choking, coughing or cyanosis after repeated attempts at endotracheal or enterogastric intubation. Aspiration of bloody content of an enterogastric tube is also suggestive of diagnosis.1 3

Chest radiography is essential for diagnosis of the condition and its complications (pneumothorax or pleural effusion).3 However, it can be normal in up to 33% of cases. In cases of strong suspicion, contrasted studies or endoscopy can be used for diagnosis.1 2 By esophagography, three types of injury can be identified: localised cervical leak, submucosal perforation and free perforation.2

Although surgical treatment has been common practice for years, currently it is reserved for patients with clinical deterioration, infection or persistent leak.1 Conservative treatment is now the standard of care, specially for those with a submucosal perforation or a small retropharyngeal collection. It consists of intravenous antibiotics, nil per os status, total parenteral nutrition and drainage of associated complications. Antibiotic therapy should be kept for at least 7–14 days and should cover both aerobic and anaerobic micro-organisms.1–3

Resolution of perforation usually occurs a week after the lesion, when a contrast study must be performed in order to document healing and initiate oral feeding safely.1 3

In our case, we have identified two risk factors for OP: endotracheal intubation and placement of an orogastric tube. Initiating early antibiotic therapy may have prevented infectious complications. Pneumothorax and pneumomediastinum are frequent complications of OP, requiring drainage for resolution, as in our case.

Learning points

  • Oesophageal perforation is a rare but life-threatening event, and can occur in premature and low birthweight infants submitted to endotracheal and enterogastric instrumentation.

  • Performing chest radiography after intubation or placement of an enterogastric tube is critical to document correct tube location. An anomalous position of an enterogastric tube makes the diagnosis of oesophageal perforation.

  • Complications are possible. Pneumothorax and pneumomediastinum can occur after oesophageal perforation and should be considered when this diagnosis is made.

  • Conservative treatment may be effective, specially for those with a submucosal perforation or a small retropharyngeal collection.

Acknowledgments

The authors would like to thank Inês Girbal (Neonatologist), Miroslava Gonçalves (Pediatric Surgeon) and Luísa Lobo (Radiologist) from Santa Maria Hospital for their support.

References

Footnotes

  • Patient consent for publication Parental/guardian consent obtained.

  • Contributors BM was responsible for conception and design of the work, as well as data collection, analysis and interpretation. AS and ML were responsible for data collection, analysis and interpretation. BM drafted the manuscript, which was critically revised by AS, ML and MA. All the authors read and approved the manuscript. All of the authors participated in the care of the presented patient.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Competing interests None declared.

  • Provenance and peer review Not commissioned; externally peer reviewed.

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