Residency · Residency · Cardiothoracic Surgery
Tracheal Surgery: Resection and Reconstruction
Introduction
Tracheal resection and reconstruction is among the most technically demanding procedures in thoracic surgery. The trachea, approximately 10-12 cm in length with 18-22 cartilaginous rings, has limited capacity for regeneration, and no widely accepted tracheal replacement exists. Primary anastomosis after segmental resection remains the gold standard for managing tracheal stenosis and tumors, with success rates exceeding 90% in experienced centers.
Anatomy
The trachea extends from the cricoid cartilage (C6) to the carina (T4-T5), measuring 10-12 cm in adults. It is composed of C-shaped cartilaginous rings anteriorly and laterally, with a posterior membranous wall (trachealis muscle). Blood supply is segmental, arising from the inferior thyroid artery (upper trachea) and bronchial arteries (lower trachea), with the lateral pedicle being critical and requiring preservation. The recurrent laryngeal nerves run in the tracheoesophageal groove bilaterally and are at high risk during cervical tracheal surgery. Approximately 50% of the tracheal length (up to 6 cm or about 6 rings) can be resected with primary anastomosis using release maneuvers.
Indications for Tracheal Resection
Benign Conditions
Post-intubation tracheal stenosis is the most common indication, occurring at the cuff site or stoma site after tracheostomy. Idiopathic tracheal stenosis presents as circumferential subglottic stenosis predominantly affecting young women. Tracheoesophageal fistula may be acquired (post-intubation, post-radiation) or congenital. Tracheoinnominate artery fistula causes life-threatening hemorrhage requiring emergency surgery.
Malignant Conditions
| Tumor Type | Frequency | Behavior | Key Feature |
|---|---|---|---|
| Squamous cell carcinoma | Most common malignant | Aggressive | Strong smoking association |
| Adenoid cystic carcinoma | Second most common | Indolent; slow-growing | Perineural spread; positive margins may have long survival |
| Mucoepidermoid carcinoma | Less common | Variable (low vs. high grade) | Arises from submucosal glands |
| Secondary invasion (thyroid, esophageal, lung) | Variable | Depends on primary | En bloc resection with primary tumor |
Primary tracheal tumors include squamous cell carcinoma (the most common malignant type), adenoid cystic carcinoma (second most common, with indolent behavior and propensity for perineural spread), and mucoepidermoid carcinoma. Secondary invasion from thyroid carcinoma, esophageal carcinoma, or lung carcinoma also occurs. Carinal tumors require carinal resection and reconstruction.
Preoperative Evaluation
CT of the neck and chest with 3D reconstruction defines the location, length, and severity of the lesion and identifies calcification and extratracheal extension. Flexible bronchoscopy is essential for assessing the lesion, degree of stenosis, mucosal health, and vocal cord function. Pulmonary function testing with flow-volume loops may show characteristic flattening of the inspiratory limb (variable extrathoracic obstruction) or expiratory limb (intrathoracic obstruction). Laryngoscopy evaluates vocal cord mobility preoperatively to document baseline function. Assessment of resection length is critical to determine feasibility of primary anastomosis, as resection exceeding 50% of tracheal length is generally not reconstructible primarily.
Surgical Technique
Cervical Tracheal Resection
A collar incision with extension along the anterior border of the sternocleidomastoid is used if needed. Dissection proceeds directly on the trachea to preserve the lateral blood supply, avoiding circumferential dissection away from the resection zone. The recurrent laryngeal nerves are identified and protected bilaterally. The stenotic or tumor-bearing segment is resected with frozen section margin analysis. Primary end-to-end anastomosis uses interrupted 4-0 absorbable sutures (Vicryl or PDS), placed before approximation. Neck flexion with a guardian stitch (chin-to-chest suture) reduces anastomotic tension.
Release Maneuvers
| Release Maneuver | Technique | Length Gained | Best Application |
|---|---|---|---|
| Suprahyoid laryngeal release (Montgomery) | Division of suprahyoid muscles from hyoid | 1-2 cm | Cervical tracheal resection |
| Inferior pulmonary ligament release | Division of inferior pulmonary ligament | ~1 cm | Carinal mobilization |
| Hilar release (U-shaped pericardial incision) | Circumferential pericardial incision around hilum | 2-3 cm | Right main bronchus/carinal resection |
| Pretracheal dissection | Blunt dissection of anterior pretracheal plane | Variable | All tracheal resections (routine) |
The suprahyoid laryngeal release (Montgomery) divides the suprahyoid muscles from the hyoid bone, gaining 1-2 cm of length. Inferior pulmonary ligament release gains approximately 1 cm of carinal mobility. Hilar release (U-shaped pericardial incision) mobilizes the hilum superiorly, gaining 2-3 cm for the right main bronchus. Pretracheal dissection using blunt dissection of the anterior pretracheal plane allows the trachea to stretch.
Carinal Resection and Reconstruction
Carinal resection is the most complex tracheal procedure, approached via right thoracotomy, median sternotomy, or clamshell incision. Reconstruction techniques include direct end-to-end anastomosis of the new carina, side-to-side bronchial anastomosis, or implantation of the left main bronchus into the bronchus intermedius. Ventilation management requires cross-field ventilation with a sterile endotracheal tube in the distal airway or high-frequency jet ventilation. Anastomotic complications are more common than in cervical procedures.
Airway Management Considerations
Close collaboration with anesthesia is essential. Spontaneous ventilation or intermittent apnea techniques are used during airway transaction. Cross-field ventilation with a sterile endotracheal tube placed into the distal trachea and high-frequency jet ventilation as an alternative are key strategies. Excessive cuff pressure on the anastomosis must be avoided postoperatively.
Postoperative Management
Neck flexion is maintained for 5-7 days with a guardian suture, and the patient is educated to avoid neck extension. Reintubation should be avoided if at all possible; if necessary, a small tube is placed under bronchoscopic guidance to avoid disrupting the anastomosis. Humidified supplemental oxygen and aggressive pulmonary toilet are provided. NPO or soft diet for 24-48 hours is appropriate for concomitant tracheoesophageal fistula repair. Bronchoscopy is performed at 1 week and at 1, 3, 6, and 12 months postoperatively to monitor healing.
Complications
Anastomotic dehiscence is rare but catastrophic, occurring more commonly with excessive tension, devascularization, or steroid use. Granulation tissue formation at the suture line is managed with bronchoscopic debridement. Restenosis occurs in 5-10% of cases and may require dilation, stenting, or re-resection. Recurrent laryngeal nerve injury causes hoarseness and aspiration risk, with higher incidence in revision surgery. Wound infection and mediastinitis may necessitate flap coverage with strap muscles or omentum.
Key Clinical Pearls
The blood supply to the trachea is segmental and lateral; circumferential dissection away from the resection zone devascularizes the trachea and leads to anastomotic failure. Up to 50% of the trachea (approximately 6 cm) can be resected with primary anastomosis when release maneuvers are employed. Post-intubation stenosis is the most common indication for tracheal resection, and cuff pressure monitoring (below 25 cmH2O) during intubation is the most effective prevention. Adenoid cystic carcinoma has a propensity for perineural spread; margins may be positive microscopically, but long-term survival is still favorable due to its indolent biology. The guardian chin-to-chest stitch is critical to prevent neck extension and anastomotic disruption during the healing period.
References
- Grillo HC. Surgery of the Trachea and Bronchi. BC Decker Inc; 2004.
- Wright CD, Grillo HC, Wain JC, et al. Anastomotic complications after tracheal resection: prognostic factors and management. Journal of Thoracic and Cardiovascular Surgery. 2004;128(5):731-739.
- Mathisen DJ. Surgery of the trachea. Current Problems in Surgery. 1998;35(6):453-542.
- Honings J, Gaissert HA, Weinberg AC, et al. Segmental tracheal resection for benign and malignant disease. Annals of Cardiothoracic Surgery. 2018;7(2):227-236.