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Eur J Cardiothorac Surg 2006;29:991-996
© 2006 Elsevier Science NL
Division of Pediatric Surgery and Pediatric Airway Unit, Pediatric Institute of the Heart, University Hospital "12 de Octubre", Madrid, Spain
Received 1 October 2005; received in revised form 12 December 2005; accepted 14 December 2005.
* Corresponding author. Address: c/Vallehermoso 20, 7° A izda, Madrid 28015, Spain. Tel.: +34 914451516; fax: +34 913908375. (Email: janton.hdoc{at}salud.madrid.org).
| Abstract |
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Key Words: Tracheal stenosis Congenital airway anomalies Tracheal surgery Bronchoscopy
| 1. Introduction |
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| 2. Materials and methods |
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Bronchoscopy was performed for diagnostic purposes in all cases. Chest X-ray and echocardiography have also been made in every patient. Other imaging and diagnostic techniques such as computed tomography (CT) scan, magnetic resonance imaging (MRI), broncography, pulmonary function tests or angiography, were performed on an individual basis. Finally, gastroesophageal reflux (GER) was a matter of concern and a 24-h pH-monitoring test or an esophagogram was obtained in everyone.
Patients were classified into three groups (Table 1 ) according to their clinical status and the endoscopic findings. The following parameters have been compiled: sex, age at diagnosis, clinical group, anatomic type, associated anomalies, treatment modality, complications and their treatment, result, and time of follow-up. In addition, the following facts were studied in the group of surgically treated patients: age at surgery, surgical technique, use of cardiopulmonary by-pass, postoperative airway intubation or stenting, and length of hospital stay.
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Associated cardiovascular malformations requiring surgical treatment were repaired simultaneously with the stenotic airway.
| 3. Results |
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Endoscopic techniques (dilatation, laser resection, and stenting) have been used mainly in the treatment of postoperative complications and in only one case we used them prior to surgery.
Survival rate is 79% (15 patients) and all survivors are asymptomatic or show only occasional symptoms. Follow-up is complete in all case, ranging from 8 months to 12.3 years (mean, 5 years). More specific details of the results are given for each type of treatment.
3.1 Medical management
Five patients, clinical group I, have been managed expectantly (Table 3
; Fig. 1
). Medical treatment consists of respiratory physiotherapy, antibiotics in case of infection, and a close survey. Two patients with Crouzon syndrome and congenital tracheal cartilaginous sleeve, with a diffuse tracheal stenosis, are included in this group. Three patients presented severe GER requiring surgical treatment. One patient died due to unrelated causes and the other four are alive and doing well. Mean follow-up is 42 months.
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Tracheal resection was performed in two patients with short segment stenosis (<30% total tracheal length) and cardiopulmonary by-pass was used during surgery in one patient because of a double aortic arc. Mean postoperative intubation and hospital stay were 12 and 33 days, respectively. The only complication was a partially obstructive intraluminal scar (mild restenosis) that was successfully resected endoscopically with YAG laser. Long-term results have been good in both cases with a mean follow-up of 11.7 years.
Five patients with long stenosis were treated with a costal cartilage tracheoplasty. Early in our series, two patients died during the surgical procedure and another one in the early postoperative period. Cardiopulmonary by-pass was not used in the first two patients and the fatal outcome was due to ventilatory and hemodynamic complications.
The two survivors (40%) are currently doing well but complications have appeared during follow-up. One showed a restenosis that required endoscopic dilatation, surgical resection, and tracheal stenting with a silicone prosthesis (Dumon, Novathec) (Fig. 2 ). The other patient required endoscopic dilatation postoperatively, because of granulation tissue, and a temporary tracheostomy. Mean postoperative intubation was 30 days and average hospital stay was 61 days. Follow-up has been 12.5 years for the first case and nearly 7 for the second.
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3.3 Endoscopic treatment
Endoscopic procedures were used mainly in the treatment of postsurgical complications (Fig. 2). Three patients required endoscopic techniques to treat complications such as restenosis (two cases) and granulation tissue formation (one patient). In the only case in which an endoscopic electroresection, followed by dilatation, was performed as the initial treatment, it was a failure. In one patient with a mild CTS, clinical group I, and severe GER which debutated with a bacterial tracheitis, bronchoscopy was effective in the debridement and cleaning of the airway.
| 4. Discussion |
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Clinical and radiological data point that the airway diameter of children with CTS grows with time [9]; so the type of treatment should be tailored to each particular case. Taking this into account, we have classified the patients according to clinical aspects, endoscopic findings, and the presence of associated anomalies (Table 1). Assembling the cases into three categories enables anatomo-clinical correlation and, with further experience, may allow group-related prognosis (Table 3) [6]. Tracheo-bronchoscopy is our preferred diagnostic tool. It is the most reliable procedure in establishing the type of lesion, its characteristics, location and extension. In addition, it allows the evaluation of the dynamic behavior and settles the amount of nonaffected airway. Spiral computed tomography with multiplanar reconstruction (CT/MPR) and magnetic resonance imaging are very useful in the diagnostic work-up of tracheobronchial anomalies. CT/MPR provides a good anatomic delineation of the airway, and MRI enables full assessment of the vascular structures and their relations to the adjacent trachea [10]. The increasing availability of these techniques makes bronchography unnecessary in most cases of CTS, so we no longer use it.
As it has already been stated, patients with mild or no symptoms may be treated in an expectant way. In symptomatic cases operative treatment is indicated. Othersen et al. [11] and Clement et al. [12] have tried laser division and dilatation of the stenotic rings, but as Wright [13] has pointed, there is very little experience and the technique is not reliable yet. In our series, the endoscopic procedures have been very useful in the management of postoperative complications, dilating and stenting restenosed tracheal segments and removing granulation tissue.
Surgical procedures fall into three categories: (1) tracheal reconstruction with autologous tracheal tissue (tracheal resection, slide tracheoplasty, and free tracheal autograft); (2) tracheoplasty with nontracheal autologous tissue (costal cartilage or pericardial patch); and (3) tracheal transplant with cadaveric homograft.
Tracheal resection with end-to-end anastomosis is the treatment of choice for short segment stenosis [2,14]. Although this procedure has been used in long stenosis, 50% or more of the tracheal length, excessive tension in the anastomosis considerably increases the risk of leakage and restenosis [15]. Most of the authors do not recommend this technique if the lesion involves more than 45 rings that is 30% of total tracheal length [16,17]. Longer stenosis are best managed by means of tracheoplasty. Several types of tracheoplasties have been described ever since Kimura et al.'s [3] first report in 1982. Published data concerning this technique show a mortality rate ranging from 0 to 55%, and complications around 40% of cases [18,19]. We have used it in five cases and long-term results have been satisfactory only in two (Fig. 2).
Slide tracheoplasty, described by Tsang et al. [20] in 1989, constitutes a landmark in the treatment of CTS. Its main advantage is that tracheal reconstruction is performed using native tracheal tissue, so granulation tissue formation is minimal and stenting is avoided. Published results with this technique are outstanding with an overall mortality rate around 9% [8,17]. Moreover, recent experimental and clinical data have shown tracheal growth after slide tracheoplasty [21,22]. We have used this procedure in seven cases and the results have been excellent (Fig. 3). Indications for slide tracheoplasty are spanding, short stenosis and stenosis associated with tracheal bronchus can also be managed with this technique, as we did in our series. Moreover, Grillo et al. [17] have treated successfully a bridge bronchus, in a 6-month-old patient, with this technique.
In one of the few studies that compare two types of techniques, Tsugawa et al. [23] conclude that the results obtained with slide tracheoplasty in 17 patients (76% of survival and 58% asymptomatic) are superior to those obtained with costal cartilage tracheoplasty in 12 operated cases (66% of survival and 50% asymptomatic). In addition, they recommend delaying surgery beyond the first year of life, if the clinical status allows it, since the postoperative course is much better. Data concerning the long-term outcome of patients treated surgically are scarce. Most of the reports have been published in the last decade and only in a few cases follow-up is extended. Grillo et al. [17] and Kutlu and Goldstraw [24] support the good long-term results of slide tracheoplasty, and Backer et al. [25] report a similar outcome in patients treated with a tracheal autograft. It seems that if the patient overcomes the short-term after the reconstructive surgery, the trachea grows and its function improves with time. Nevertheless, physiological studies are still necessary in order to confirm this clinical observation.
Management of patients with CTS is complex and requires a close cooperation between pediatricians, surgeons, anesthesiologists, and nursing staff. Selection of the most suitable treatment depends on the patient's clinical situation and the anatomic type of stenosis.
| Appendix A |
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Dr A. Turna (Istanbul, Turkey): What was the surgical basis of costal cartilage tracheoplasty? Having said such a high mortality, would you recommend this technique for selective patients after this analysis?
Dr Anton-Pacheco : We do not recommend. We do not perform costal cartilage tracheoplasty anymore. These were the first cases of the series, 10 years ago, 12 years ago, and some of the patients were operated without cardiopulmonary by-pass. So we had ventilatory and hemodynamic problems during surgery. And we think that's the main problem, apart from that two of them were very sick when they were operated.
Dr Turna : In the patients with costal cartilage tracheoplasty, could you give the information about the immediate tracheal fistula?
Dr Anton-Pacheco : You mean the complications of the two survivors, or the complications of the three patients that died?
Dr Turna : I meant to say the perioperative complication, tracheal fistula.
Dr Anton-Pacheco : Well, we have one leak and mediastinitis and that patient died in the postoperative course. And the other two survivors had restenosis in one case and granulation tissue in the other.
Dr D. Branscheid (Grosshansdorf, Germany): I missed a little bit the view to the pretreatment of those kids. We have a lot of problems in that little children, they got a tracheostomy, they got conservative treatment before they got dilatation, they got stents, they got insufficient operations before they came then, definitively, to resection of the trachea which made them good.
Do you have in your series also some of those kids, and what do you recommend?
How is your cooperation with the pediatricians?
Dr Anton-Pacheco : We dont have patients that have been operated in other institutions, first, for the moment.
And then we classify the patients. There are some patients with very mild symptoms and so they are treated nonoperatively with physiotherapy, close surveillance and antibiotic therapy in case of infection. And then we follow them very, very narrowly. We repeat the bronchoscopies, and we see how they are. And if they become symptomatic, then they are operated on.
| Footnotes |
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Presented at the joint 19th Annual Meeting of the European Association for Cardio-thoracic Surgery and the 13th Annual Meeting of the European Society of Thoracic Surgeons, Barcelona, Spain, September 2528, 2005. | References |
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