Uzdenov M. , Loukanov T. , Springer W. , Gorenflo M.
University Hospital Heidelberg;
Introduction: We analyzed the outcome of surgical airway reconstruction using cardiopulmonary bypass (CPB) as additional technique during more extensive reconstruction procedures which would have been limited by conventional ventilation.
Methods: In this retrospective single center analysis, we included all patients presenting in the period between 2008 and 2018 with severe respiratory failure due to airway obstruction/ compression caused by (1) intrinsic malformations of the trachea leading to respiratory failure or (2) vascular and/ or congenital heart defects associated with respiratory failure. All patients underwent bronchoscopy, additional imaging was performed by CT or MRI, and in selected cases by cardiac catheterization. Follow-up data were obtained from follow-up examinations.
Results: 114 patients, aged 0.8 years [10 days – 49 years] (Median [range]) presenting with vascular ring (78 out of 114), intrinsic tracheal malformations (n=24/ 114), pulmonary sling (n=12/ 114) were included. 33/ 114 patients had additional cardiac malformations including VSD (n=15/ 33), Fallot/DORV 4/ 33, aortic arch hypoplasia (1/ 33) or complex CHD (13/ 33).
Surgical techniques included
- decompression of airway by transection of ligaments or vascular remnants (n=82),
- partial resection of stenotic segments of the trachea (n=19),
- slide tracheoplasty (n=9).
In selected cases, external reexpansion of trachea was used (n=4). CPB was used in 75/114 patients and was a pre-requisite for all patients in whom tracheal procedures were needed or whenever additional intracardiac repair was performed. During the follow-up period, 10 syndromic patients died: 3 patients (Trisomy 21 n=1, VACTERL n=2) died due to neurological complications. Seven patients died due to multi-organ failure (one due to sepsis after leakage of tracheal anastomosis). The surviving 104 patients showed clinical improvement or – if previously ventilator dependent - could be weaned successfully.
Conclusions: Relief of vascular compression and/ or reconstruction of the trachea and main bronchi can be performed safely in patients with severe airway malformations by using CPB and modern reconstructive techniques. However, pre-existing syndromatic disease and co-existing multimorbidity must be taken into account in decision making.