Overview 

Tracheal stenosis, characterised by the narrowing of the trachea, is a serious respiratory disorder.¹ The trachea (windpipe) is a part of the airway between the voice box and lungs and comprises “C”- shaped cartilage rings called tracheal rings.² Any narrowing of the trachea hampers the normal breathing process. Tracheal stenosis is predominantly observed in adults, and rarely in children, and it may be life-threatening.³

This narrowing of the trachea, which could be due to various reasons, poses significant challenges for healthcare professionals. It is difficult to diagnose, treat, and manage this condition.

Causes of tracheal stenosis

Tracheal stenosis has multiple causes depending on the type. It is mainly of two types: acquired and congenital.

The main causes of congenital and acquired stenosis are:

• Congenital tracheal stenosis – defects occurring during foetal development
• Acquired tracheal stenosis – caused mainly by trauma, inflammation, and long-term intubation

Other than those mentioned, there are several other factors causing breathing discomfort, such as age, medical history and lifestyle. Some noteworthy causes are as follows:

• Intubation or prolonged medical treatment 
• Neck trauma due to injury
• Long-standing inflammatory disease
• Autoimmune disease
• X-ray therapy
• Tumours 
• Surgical complications
• Genetic predisposition

Hence, the narrowing of the trachea is often caused by scarring, softening of the cartilaginous structures of the trachea, inflammatory processes and abnormal healing, leading to progressive airway stenosis and difficulty in breathing. As this narrowing can be due to several issues, it may complicate treatment and management for doctors.

Signs and symptoms

Severe tracheal stenosis may cause:

• Early signs: Noisy breathing (stridor), especially in infants
• Progressive symptoms: Shortness of breath (dyspnoea), feeding problems, and bluish skin (cyanosis)
• Other symptoms: Respiratory failure in severe cases, poor growth in infants, and frequent infections

The severity of symptoms depends on how much the upper airway is narrowed. Greater narrowing leads to more breathing difficulty. In severe cases, it can become life-threatening.

The severity of tracheal stenosis is graded using the Cotton-Meyer system. It consists of classification based on two-dimensional (2-D) projections of three-dimensional (3-D) stenosis features, such as:⁴

Grade 1: Mild narrowing

• 0-50% airway blocked
• Minimal breathing issues
• Easier to manage

Grade 2: Moderate narrowing

• 51-70% airway blocked
• Noticeable breathing difficulties
• Requires medical intervention

Grade 3: Severe narrowing

• 71-99% airway blocked
• Significant breathing problems
• Urgent medical treatment is needed

Grade 4: Complete obstruction

• 100% airway blocked
• Life-threatening
• Immediate emergency care is required

Severe tracheal stenosis, leading to more than 90 per cent narrowing of the airway, needs immediate medical attention. Surgery may be required to prevent worsening breathing problems. Causes include fibromas, injuries, chronic inflammation, benign or malignant tumours, and connective tissue disorders.

Airway management in severe tracheal stenosis

Effective airway management for severe tracheal stenosis is the balance between maintaining the airway while minimising associated risk. Below are the essential actions and techniques used by medical professionals:

Emergency airway interventions

• Bag-valve mask ventilation or nasal oxygenation may temporarily support oxygenation
• Endotracheal intubation is often challenging due to the narrowing of the airway. Specialised techniques or equipment, like a smaller diameter tube, may be required⁵
• When intubation is not feasible, rapid cricothyrotomy or tracheostomy should be attempted. Tracheal stenosis due to tracheostomy can present as difficult airway management and respiratory complications⁶

 Surgical and endoscopic techniques

• Balloon dilation: This minimally invasive technique uses a balloon catheter to temporarily widen the airway, especially treating obstruction in cases caused by medical interventions or injury⁷
• Laser ablation: For patients with soft tissue obstructions, laser treatment can remove excess tissue⁸
• Stent placement: Stents can provide structural support to maintain airway patency
• Tracheal resection and reconstruction: In severe cases, surgical removal of the affected segment with reconstruction may be the definitive solution⁹

Long-term airway management

• Bronchoscopy for regular airway monitoring and complications management
• Steroids or immunosuppressants for autoimmune-related stenosis. Managing underlying causes, such as infections or tumours, to avoid recurrent episodes

Care after treatment

• Watch for problems like infection or the airway narrowing again
• Do regular check-ups with scans and breathing tests
• Use medications like inhalers or antibiotics if needed
• Do effective breathing exercises

FAQs

What is the approach for tracheal stenosis?

Tracheal stenosis is a narrowing of the trachea. This restricts the proper airflow and blocks a portion of the respiratory tract, resulting in symptoms like shortness of breath, wheezing and coughing. Serious cases might require procedures to clear the airway, such as inserting a tube or expanding it. In some cases, the narrow section of the airway needs to be removed surgically.

What is airway management?

Airway management is planning, assessing and maintaining an individual’s breathing. Normal breathing can be restored in cases of airway obstruction by several medical or surgical techniques. Options for temporarily widening the airway include widening with a balloon or placing a stent to keep it open. A tracheostomy can be done to assist the patient in breathing in emergencies. Doctors will suggest the most effective method.

What is the best treatment for severe tracheal stenosis?

Tracheostomy is a technique for airway management in severe cases of tracheal stenosis. It is the most effective long-term solution. Airway management techniques for severe tracheal stenosis vary with the degree of obstruction in the windpipe. Surgery can be performed to remove the blocked section of the windpipe and reconnect healthy sections.

What is the recovery time after tracheal surgery?

It may take several weeks to recover from tracheal resection. During this period, the patient should rest and avoid any strenuous activities, which may lead to complications. They may be given pain medications to relieve any pain. The patients must maintain regular follow-ups with their doctor for proper management and to update the treatment plan as needed. The time required to recover from tracheal stenosis varies depending on the severity of discomfort.

Summary

Tracheal stenosis is a potentially life-threatening problem in which the trachea (windpipe) becomes too narrow. It can happen due to injuries, irritation, tumours, or ongoing medical treatments. Severe symptoms of tracheal stenosis include difficulty breathing, noisy breathing (stridor), coughing and in extreme stages, respiratory failure. Some other symptoms of tracheal stenosis are dyspnea, frequent respiratory infections and difficulty in feeding in children. 

Treatment includes temporarily reversing the obstruction using emergency measures like intubation or tracheostomy, or other techniques, such as dilating the airway with a balloon, inserting a stent or performing surgery to remove the narrow segment. Its long-term care includes regular check-ups, treating the root cause, and using medications or breathing exercises to keep the airway open.