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J Thorac Cardiovasc Surg 2002;123:145-152
© 2002 The American Association for Thoracic Surgery
General Thoracic Surgery |
From the Divisions of General Thoracic Surgery and Cardiac Surgery, Massachusetts General Hospital, and the Department of Surgery, Harvard Medical School, Boston, Mass.
Received for publication April 23, 2001. Revisions requested June 19, 2001; revisions received July 24, 2001. Accepted for publication July 27, 2001. Address for reprints: Hermes C. Grillo, MD, Massachusetts General Hospital, Blake 1570, Boston, MA 02114 (E-mail: pguerriero{at}partners.org).
| Abstract |
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-7
years).
years, respectively). | Introduction |
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There is no effective medical treatment. Forceful dilation may result in splitting the cartilage O rings, with the possibility of perforation or restenosis. Three surgical techniques have been used for correction. First, early reports of tracheal resection and reconstruction in children by DeLorimier and colleagues,
4 Grillo and Zannini,
5 and Carcassonne and coworkers
6 included patients with congenital stenosis. It was demonstrated experimentally and clinically
7,8 that anastomosis of the juvenile trachea grew satisfactorily. However, only a finite length of trachea, approximately 25% to 30%, can be resected and followed by end-to-end suture before excessive anastomotic tension may result in separation.
9
Second, long congenital stenosis beyond the compass of safe resection and reconstruction was treated by Kimura,
10 Tsugawa,
11 and their associates by means of a linear anterior incision of the stenotic segment and insertion of a patch of costal cartilage. Idriss and colleagues
12 and successors modified this approach by substitution of a pericardial patch. The flexible pericardial insert must be suspended to the mediastinum, and all patch techniques require prolonged stenting with intubation during early healing. Patch techniques were also reported by Bando,
13 Jaquiss,
14 and their associates. Granulation tissue arising from the mesenchymal surface of the patches required multiple bronchoscopic debridements and necrosis or collapse of the patch sometimes occurred.
15,16 Reoperation was necessary in 7 of 28 patients.
17
Third, to solve this vexing problem, Tsang and associates
18 proposed slide tracheoplasty. The stenotic segment is transected at its midpoint, the upper and lower stenotic segments are incised vertically anteriorly in one segment and posteriorly in the other, the corners of these splayed segments are trimmed, and the two are slid together and sutured(Figure 1). The circumference of the trachea is doubled, and the cross-sectional area is quadrupled.
19 The stenotic segment is shortened by half. The trachea is thus repaired with tracheal wall containing native cartilages and is immediately lined with normal tracheal epithelium. Satisfactory subsequent growth was demonstrated experimentally and clinically.
20,21
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| Patients and methods |
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years) were seriously symptomatic (patients 7, 3, 6, and 4). The 10-day-old infant was transferred from another hospital intubated and in respiratory distress. The 3-month-old child had stridor and episodes of cyanosis and desaturation. The 6-month-old child had a similar history and was received intubated receiving heliox with elevated PCO2. The 6-month-old had respiratory arrest and was transferred intubated from another hospital. A 10
-year-old (patient 8) had dyspnea, stridor, cyanosis, and impaired ventricular function. She had undergone a bidirectional Glenn procedure earlier in life. Her airway was corrected in anticipation of a Fontan procedure. Maximal stenosis in these patients was between 1.9 and 3 mm in diameter. The 3 teenaged patients (patients 1, 2, and 5) were severely limited in activities of all types. One had been seen previously, but repair initially was deferred because only patch procedures were then available.
Stenoses varied in length from 36% to 83% of tracheal length(Figure 2
). Of these 8 patients, 3 had an anomalous right upper lobe bronchus, 1 associated with a bridging bronchus and also left pulmonary artery sling. Another anomalous pulmonary artery was in conjunction with 50% of length lower tracheal stenosis. He had a constellation of anomalies that occur with congenital tracheal stenosis, including inperforate anus. The 10
-year-old had an anomalous retrotracheal pulmonary artery (anastomosed previously to the superior vena cava at the time of a bidirectional Glenn procedure), but it did not curve around or impinge significantly on the trachea. One showed a degree of malacia in the short segment of trachea below a bronchus suis and also in both main bronchi.
Resection and reconstruction
Data on patients undergoing resection and reconstruction are given inTable 2.
The 3-month-old had severe symptoms from birth and had a complex of stenosis and malacia over a short tracheal segment just above the carina (patient 9). The shortness of the segment and the accompanying malacia were indications for resection and anastomosis. The 7-month-old with VACTERL*
association was transferred intubated and ventilated by means of tracheostomy after tracheoesophageal fistula repair, modified Blalock-Taussig shunt for single-ventricle congenital heart disease, gastric fundoplication, and colostomy. He had air trapping and episodes of airway obstruction (patient 11). A bridging bronchus was very narrow throughout but showed maximal stenosis at its proximal end, making it unsuitable for slide tracheoplasty, as was done in patient 6. The segment was short enough to permit complete resection and anastomosis. The 23-year-old had been observed since infancy, when the stenosis was deemed too long for resection. He had undergone several surgical procedures for other malformations. The stenotic segment remained narrow but grew proportionally to the normal trachea. Resection was done to enhance his performance capabilities (patient 10).
Procedures
The technique of our modification of Tsang and Goldstraw's procedure for slide tracheoplasty has been described in detail.
19 The first 5 tracheoplasties were performed without need for cardiopulmonary bypass. Two patients who required reimplantation of the left pulmonary artery also needed a period of normothermic bypass. Because the left pulmonary artery was divided early for access, the tracheoplasty was also performed during bypass before pulmonary arterial reanastomosis. In patient 6 a segment of mild stenosis proximal to the severely stenotic bridging bronchus was not modified, and tracheoplasty was confined to the very stenotic bridging bronchus. In all but the first patient, the distal segment of stenosis was opened anteriorly. Patient 1 showed cartilage O rings in both main bronchi, but narrowing was insufficient to require enlargement. The slide technique could be modified to accomplish this were it necessary.
Patient 8 was operated on during bypass because of impaired ventricular function. The stenosis telescoped from a 3.5-cm segment with a diameter of 3 to 4 mm to a 4-cm segment of 2 to 3 mm in diameter, with an additional shelf of scar at the meeting point of the segments. This was believed to have resulted from prolonged intubation during prior operations. This 1-cm zone of maximal stenosis was resected, and slide tracheoplasty was performed on the remaining stenosis.
The thymic lobes are usually separated for tracheal exposure. With modest further mobilization, a thymic lobe was generally interposed between the tracheal suture line and the brachiocephalic artery to buttress the anastomosis and prevent potential erosion of the artery. Right sternohyoid muscle divided superiorly was used in patient 8, in whom previous cardiac operations made the thymus unavailable.
Resection and simple reconstruction was done with our conventional tracheal surgical techniques. In the patient with supracarinal stenosis and malacia (patient 9), complete sternotomy and transpericardial exposure of the carina provided excellent access. A sufficiently wide opening for generous tracheal anastomosis was created at the junction of the relatively transverse main bronchi. The anastomosis was covered with a pedicled strip of pericardium.
Resection of a connecting bridge bronchus was described by Cantrell and Guild.
1 Larger ovoid apertures were made at the site of origin of the stenotic bridge and at its insertion into the distal bronchial branching (patient 11). Great care was taken to widen these openings so that bronchial kinking would be minimized after approximation of the apertures. Cardiopulmonary bypass was used in this patient with single-ventricle physiology because atrial septectomy was performed concomitantly. The preexisting tracheostomy was left in place.
All patients were approached anteriorly, 3 through a cervical incision only, 3 through a collar incision with partial upper sternotomy, and 5 through a collar incision with complete sternotomy.
| Results |
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years during, respectively, follow-up periods of 1 year and 6 months and over 8, 5, and 7 years. Growth was predictable from sequential bronchoscopic observation of unoperated stenosis (patient 10) and by means of imaging.Two of 7 slide tracheoplasty patients and 1 resection patient had a single suture line granuloma that was removed by means of a single bronchoscopy and did not recur. Tracheal stomal granulation tissue occurred in the resected patient referred with a preexisting tracheostomy, multiple prior operations, and on a ventilator. He was troubled by postoperative atelectasis and needed repeated aspiration bronchoscopies for secretions. He has continuing medical problems, but his airway remains entirely adequate. The 2 patients who had left pulmonary artery reimplantation showed reduced arterial flow. One underwent dilation of the arterial anastomosis, with improvement in flow. One subcutaneous sternal closure suture was removed. One patient had left vocal cord paralysis postoperatively, which recovered spontaneously.
| Discussion |
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Given the lesser tolerance of tension in juvenile tracheal anastomosis,
9 slide tracheoplasty should, in our opinion, be considered for all but the shortest stenotic segments. In infants it is also likely that a slide procedure would lessen the obstructive possibility of early narrowing caused by edema in a circular suture line after resection. Slide tracheoplasty is gaining acceptance.
16,23-30 Although most are reports of 1 or 2 patients, overall mortality, including this series, is 9%(Table 3).
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Finally, resection of a very short bridge bronchus (patient 11) deserves attention for treatment of that specific anatomic situation.
1
| Footnotes |
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| References |
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