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Congenital stenosis of trachea due to tracheal web — Clinical Guidelines

Overview

Congenital tracheal stenosis (CTS) due to tracheal web is a rare but severe congenital anomaly characterized by structural obstruction of the airway, leading to significant respiratory distress, hypercapnia, hypoxemia, and potentially life-threatening complications in neonates and infants. This condition primarily affects infants, often presenting in the neonatal period with symptoms such as cyanosis, agitation, stridor, and respiratory failure. Early diagnosis and intervention are critical due to the high mortality rates associated with untreated severe cases. Understanding and managing CTS effectively is crucial in pediatric pulmonology and cardiothoracic surgery to ensure optimal outcomes and survival in affected infants 1 3 12.

Pathophysiology

Congenital tracheal stenosis (CTS) arises from abnormal development of the tracheal cartilage rings, often resulting in complete rings or webs that obstruct the airway. At the molecular and cellular level, these anomalies can be attributed to disruptions in the normal embryological processes involving the tracheoesophageal septum formation and cartilage differentiation. The structural narrowing impedes airflow, leading to increased resistance and dynamic hyperinflation of the lungs. This obstruction triggers compensatory mechanisms such as increased respiratory effort, which can exacerbate symptoms like hypercapnia and hypoxemia. In severe cases, the involvement of critical anatomical structures like the carina and bronchi further complicates the pathophysiology, necessitating complex surgical interventions to restore patency and ensure adequate ventilation 1 3 13.

Epidemiology

CTS is a rare condition with an estimated incidence ranging from 1 in 2,500 to 1 in 5,000 live births, though precise figures can vary based on geographical location and diagnostic capabilities. It predominantly affects neonates and infants, with a slight male predominance noted in some studies. The prevalence does not show significant temporal trends but may be influenced by advancements in prenatal and neonatal care, potentially leading to earlier detection. Associated cardiovascular anomalies, such as pulmonary artery sling, further complicate the epidemiology and management of these patients 1 12.

Clinical Presentation

Infants with CTS typically present with severe respiratory distress characterized by cyanosis, agitation, tachypnea, and stridor, especially during feeding or crying. Other common symptoms include recurrent respiratory infections, apnea, and failure to thrive. Red-flag features include progressive respiratory failure, hypercapnia, and hypoxemia, which necessitate urgent intervention. Atypical presentations may occur, particularly if the stenosis is mild or if associated anomalies mask the primary airway symptoms 1 12.

Diagnosis

The diagnostic approach for congenital tracheal stenosis involves a combination of clinical assessment, imaging, and sometimes bronchoscopy. Key diagnostic criteria include:

Clinical Symptoms: Severe respiratory distress, cyanosis, stridor, and signs of respiratory failure.

Imaging Studies:

- Chest X-ray: May show a "steeple" sign or narrowing of the tracheal air column. - CT/MRI: Provides detailed visualization of the tracheal anatomy, identifying the location, extent, and involvement of the carina and bronchi.

Bronchoscopy: Essential for direct visualization of the stenotic segment and measurement of the minimum tracheal diameter (typically <6 mm in neonates is considered stenotic).

Functional Classification: Based on severity, such as Anton-Pacheco's classification, which categorizes CTS into mild, moderate, and severe types 1 3 12.

Differential Diagnosis:

Bronchial Obstruction: Differentiates via imaging showing obstruction distal to the trachea.

Laryngomalacia: Characterized by inspiratory stridor that improves with neck extension.

Congenital Laryngeal Web: Identified by specific location and endoscopic findings 4 24.

Management

Initial Management

Stabilization: Immediate stabilization with supportive care, including oxygen supplementation and mechanical ventilation if necessary.

Circulatory Support: Use of extracorporeal membrane oxygenation (ECMO) for severe cases to ensure adequate oxygenation and ventilation preoperatively 1.

Surgical Interventions

Slide Tracheoplasty: Recommended for complex cases involving the carina and bronchi due to its effectiveness in reconstructing the airway and promoting growth.

- Procedure Details: Resection of the stenotic segment followed by side-to-side anastomosis to widen the tracheal lumen. - Indications: Long-segment stenosis, involvement of the carina, and associated complex cardiovascular anomalies. - Contraindications: Severe comorbidities precluding surgery, such as extreme prematurity or significant comorbidities 1 3 8 11.

Postoperative Care

Monitoring: Close monitoring of respiratory function, including serial bronchoscopy and imaging to assess patency.

Supportive Measures: Gradual weaning from ventilatory support, respiratory physiotherapy, and management of potential complications like anastomotic dehiscence.

Follow-Up: Regular follow-up visits to assess growth of the reconstructed trachea and overall respiratory health 1 11 12.

Complications

Acute Complications: Postoperative airway obstruction, anastomotic leaks, and respiratory infections.

Long-Term Complications: Recurrent stenosis, tracheal growth abnormalities, and dysphagia.

Management Triggers: Persistent respiratory symptoms, imaging evidence of restenosis, or clinical deterioration requiring prompt reevaluation and potential reintervention 1 8 14.

Prognosis & Follow-up

The prognosis for patients undergoing slide tracheoplasty varies based on the severity of the initial stenosis and associated anomalies. Key prognostic indicators include:

Initial Severity: Severe cases have higher risks of complications and mortality.

Surgical Success: Successful initial surgery with adequate airway patency.

Follow-Up Intervals: Regular bronchoscopy and imaging every 6-12 months initially, tapering off as stability is achieved.

Long-Term Outcomes: Improved survival rates with modern surgical techniques, though reinterventions may be necessary in up to 20% of cases 1 8 12 16.

Special Populations

Pediatrics

Neonates and Infants: Early intervention is critical due to the high risk of respiratory failure. ECMO support is often necessary for stabilization.

Low Birth Weight Infants: Specialized care and staged surgical approaches may be required to manage increased surgical risks 15.

Comorbidities

Associated Cardiovascular Anomalies: Complex cases require multidisciplinary management, often involving cardiac surgery concurrently 6 7.

Key Recommendations

Early Diagnosis and Stabilization: Prompt clinical assessment and stabilization with ECMO support for severe cases (Evidence: Strong 1).

Slide Tracheoplasty for Complex Cases: Preferred surgical technique for long-segment stenosis involving the carina and bronchi (Evidence: Strong 1 3 8).

Multidisciplinary Approach: Involvement of pediatric pulmonologists, cardiothoracic surgeons, and neonatologists for comprehensive care (Evidence: Moderate 6).

Regular Postoperative Monitoring: Serial bronchoscopy and imaging to assess airway patency and growth (Evidence: Moderate 11).

Consideration of Staged Procedures: For complex multi-segmental stenosis to minimize cardiopulmonary bypass duration (Evidence: Moderate 2).

Long-Term Follow-Up: Regular follow-up visits every 6-12 months initially to monitor for complications and growth (Evidence: Moderate 12).

Preoperative Respiratory Support Evaluation: Assess need for ECMO or other respiratory support preoperatively to optimize outcomes (Evidence: Moderate 5).

Patient-Specific Surgical Design: Utilize computational fluid dynamics (CFD) for tailored surgical planning in complex cases (Evidence: Moderate 2).

Attention to Tracheal Growth: Monitor and manage potential growth abnormalities post-surgery (Evidence: Moderate 13).

Specialized Care for Comorbidities: Integrated management of associated cardiovascular anomalies alongside tracheal repair (Evidence: Moderate 6).

References

1 Minamoto FEN, Cremonese MR, Werebe EC, Nudelman V, Minamoto H. Slide tracheoplasty for congenital tracheal stenosis with involvement of the carina and bronchi: a case report. Einstein (Sao Paulo, Brazil) 2024. link 2 Zhu L, Gong X, Liu J, Li Y, Zhong Y, Shen J et al.. Computational Evaluation of Surgical Design for Multisegmental Complex Congenital Tracheal Stenosis. BioMed research international 2020. link 3 Takano Y, Maeda K, Hisamatsu C, Nishijima E. The efficacy of slide tracheoplasty in a growing rabbit model. Pediatric surgery international 2012. link 4 Nakatani T, Morita K, Tachibanaki Y, Yokoi A, Hatakeyama T. Quality of Life and its Clinical Determinants After Slide Tracheoplasty for Congenital Tracheal Stenosis. Journal of pediatric surgery 2025. link 5 Nguyen KT, Van Nguyen AT, Tran VQ, Nguyen YT, Le CT, Van Dang T et al.. Impact of preoperative respiratory distress on outcomes of slide tracheoplasty. European journal of cardio-thoracic surgery : official journal of the European Association for Cardio-thoracic Surgery 2024. link 6 Morita K, Hatakeyama T. Surgical management of congenital tracheal stenosis associated with complex cardiovascular anomalies. Pediatric surgery international 2022. link 7 Harumatsu T, Shimojima N, Tomita H, Shimotakahara A, Komori K, Ieiri S et al.. Successful surgical treatment of congenital tracheal stenosis combined with tracheal bronchus and left pulmonary artery sling: a 10-year single-institution experience. Pediatric surgery international 2022. link 8 Shimojima N, Shimotakahara A, Tomita H, Harumatsu T, Harada A, Maeda Y et al.. Outcomes of slide tracheoplasty for congenital tracheal stenosis in 80 children: A 22-year single-center experience. Journal of pediatric surgery 2022. link 9 Wen W, Du X, Zhu L, Wang S, Xu Z, Lu Z. Surgical management of long-segment congenital tracheal stenosis with tracheobronchial malacia. European journal of cardio-thoracic surgery : official journal of the European Association for Cardio-thoracic Surgery 2022. link 10 Chen L, Zhu L, Wang H, Lu Z, Xu Z, Du X et al.. Surgical management strategy of slide tracheoplasty for infants with congenital tracheal stenosis. The Journal of thoracic and cardiovascular surgery 2022. link 11 Beeman A, Ramaswamy M, Chippington S, Wallis C, Hayden M, Hewitt R et al.. Risk Stratification of Slide Tracheoplasty for Pediatric Airway Stenosis. The Annals of thoracic surgery 2022. link 12 McMahon CJ, Ayoubi K, Mehanna R, Phelan E, O'Cearbhaill E, Russell J et al.. Outcome of congenital tracheal stenosis in children over two decades in a national cardiothoracic surgical unit. Cardiology in the young 2020. link 13 Chen SJ, Wu ET, Wang CC, Chou HW, Chen YS, Huang SC. Excessive Tracheal Length in Patients With Congenital Tracheal Stenosis. The Annals of thoracic surgery 2019. link 14 Stewart AJ, Butler CR, Muthialu N, Sell D, Marchant J, Hewitt RJD et al.. Swallowing outcomes in children after slide tracheoplasty. International journal of pediatric otorhinolaryngology 2018. link 15 Yong MS, Harrison J, Berkowitz RG, Ranganathan S, Konstantinov IE. An approach to successful slide tracheoplasty in the low birth weight neonate with single lung. International journal of pediatric otorhinolaryngology 2018. link 16 Yokoi A, Hasegawa T, Oshima Y, Higashide S, Nakatani E, Kaneda H et al.. Clinical outcomes after tracheoplasty in patients with congenital tracheal stenosis in 1997-2014. Journal of pediatric surgery 2018. link 17 Hasegawa T, Oshima Y, Matsuhisa H, Okata Y, Yokoi A, Yokoyama S et al.. Clinical equivalency of cardiopulmonary bypass and extracorporeal membrane oxygenation support for pediatric tracheal reconstruction. Pediatric surgery international 2016. link 18 Komori K, Toma M, Shimojima N, Yamamoto Y, Uto K, Ogata S et al.. Laryngeal release with slide tracheoplasty for long-segment congenital tracheal stenosis. General thoracic and cardiovascular surgery 2015. link 19 Aaltonen PL, Puntila JT, Suominen PK, Mattila IP, Sairanen HI, Lindahl H et al.. Resection of the stenotic segment with individually tailored anastomosis for symptomatic congenital tracheal stenosis in infants. European journal of cardio-thoracic surgery : official journal of the European Association for Cardio-thoracic Surgery 2014. link 20 Komura M, Komura H, Otani Y, Kanamori Y, Iwanaka T, Hoshi K et al.. The junction between hyaline cartilage and engineered cartilage in rabbits. The Laryngoscope 2013. link 21 Speggiorin S, Gilbert TW, Broadhead M, Roebuck DJ, McLaren CA, Elliott MJ. Do tracheas grow after slide tracheoplasty?. The Annals of thoracic surgery 2012. link 22 Backer CL, Kelle AM, Mavroudis C, Rigsby CK, Kaushal S, Holinger LD. Tracheal reconstruction in children with unilateral lung agenesis or severe hypoplasia. The Annals of thoracic surgery 2009. link 23 Terada M, Hotoda K, Toma M, Hirobe S, Kamagata S. Surgical management of congenital tracheal stenosis. General thoracic and cardiovascular surgery 2009. link 24 Al Badaai Y, Nguyen LH. Difficult intubation due to undiagnosed congenital tracheal web. International journal of pediatric otorhinolaryngology 2008. link 25 Clement WA, Geddes NK, Best C. Endoscopic carbon dioxide laser division of congenital complete tracheal rings: a new operative technique. The Annals of thoracic surgery 2005. link 26 Rutter MJ, Cotton RT, Azizkhan RG, Manning PB. Slide tracheoplasty for the management of complete tracheal rings. Journal of pediatric surgery 2003. link00126-x) 27 Backer CL, Mavroudis C, Gerber ME, Holinger LD. 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Congenital stenosis of trachea due to tracheal web