Innominate artery compression of the trachea: diagnosis and treatment by anterior suspension. A 25-year experience

Chronic respiratory disorders due to aberrant innominate artery: a case series and critical review of the literature

BACKGROUND

Tracheal compression (TC) due to vascular anomalies is an uncommon, but potentially serious cause of chronic respiratory disease in childhood. Vascular slings are congenital malformations resulting from abnormal development of the great vessels; in this group of disorders the most prevalent entity is the aberrant innominate artery (AIA). Here we provide a report on diagnosis and treatment of AIA in nine children with unexplained chronic respiratory symptoms. We describe the cases, perform a literature review, and provide a discussion on the diagnostic workup and treatment that can help manage AIA.

METHODS

Clinical history, diagnostic procedures and treatment before and after the AIA diagnosis were retrospectively reviewed in nine children (5 boys and 4 girls), who were referred for recurrent-to-chronic respiratory manifestations over 10 years (2012-2022). We performed a comprehensive report on the ongoing clinical course and treatment as well as an electronic literature search on the topic.

RESULTS

Diagnoses at referral, before AIA was identified, were chronic dry barking cough associated with recurrent pneumonia (n = 8, 89%), lobar/segmental atelectasis (n = 3, 33%), atopic/non atopic asthma (n = 3, 33%); pneumomediastinum with subcutaneous emphysema complicated the clinical course in one case. When referred to our Unit, all patients had been previously treated with repeated antibiotic courses (n = 9, 100%), alone (n = 6, 67%) or combined with prolonged antiasthma medications (n = 3, 33%) and/or daily chest physiotherapy (n = 2, 22%), but reported only partial clinical benefit. Median ages at symptom onset and at AIA diagnosis were 1.5 [0.08-13] and 6 [4-14] years, respectively, with a relevant delay in the definitive diagnosis (4.5 years). Tracheal stenosis at computed tomography (CT) was ≥ 51% in 4/9 cases and ≤ 50% in the remaining 5 subjects. Airway endoscopy was performed in 4 cases with CT evidence of tracheal stenosis ≥ 51% and confirmed CT findings. In these 4 cases, the decision of surgery was made based on endoscopy and CT findings combined with persistence of clinical symptoms despite medical treatment. The remaining 5 children were managed conservatively.

CONCLUSIONS

TC caused by AIA may be responsible for unexplained chronic respiratory disease in childhood. Early diagnosis of AIA can decrease the use of expensive investigations or unsuccessful treatments, reduce disease morbidity, and accelerate the path toward a proper treatment.

Surgical Reconstruction for Severe Tracheal Obstruction in Morquio A Syndrome

Progressive tracheal obstruction is commonly seen in Morquio A syndrome and can lead to life-threatening complications. Although tracheostomy can address severe upper airway obstruction, lower airway obstruction, commonly associated with a narrow thoracic inlet and vascular compression, requires an alternative approach. We describe the case of a 16-year-old patient with Morquio A syndrome whose near-fatal tracheal obstruction was relieved by timely surgical tracheal vascular reconstruction with dramatic resolution of his respiratory symptoms.

Mild tracheal compression by aberrant innominate artery and chronic dry cough in children

BACKGROUND

In children with aberrant innominate artery (AIA) one of the most prevalent respiratory symptom is dry cough. How frequently this mediastinal vessels anomaly, that can induce tracheal compression (TC) of different degree, may be detected in children with chronic dry cough is not known.

METHODS

In a 3-year retrospective study, the occurrence of mediastinal vessels abnormalities and the presence and degree of TC was evaluated in children with recurrent/chronic dry cough.

RESULTS

Vascular anomalies were detected in 68 out of the 209 children evaluated. A significant TC was detected in 54 children with AIA, in eight with right aortic arch, in four with double aortic arch but not in two with aberrant right subclavian artery. In AIA patients, TC evaluated on computed tomography scans, was mild in 47, moderate in six and severe in one. During bronchoscopy TC increased in expiration or during cough, but this finding was more pronounced in children with right aortic arch and double aortic arch in which a concomitant tracheomalacia was more evident. Comorbidities were detected in 21 AIA patients, including atopy, reversible bronchial obstruction and gastroesophageal reflux. Aortopexy was performed in eight AIA patients, while the remaining AIA patients were managed medically and showed progressive improvement with time.

CONCLUSION

Mild TC induced by AIA can be detected in a sizeable proportion of children with recurrent/chronic dry cough. The identification of this anomaly, that may at least partially explain the origin of their symptom, may avoid further unnecessary diagnostic examinations and ineffective chronic treatments.

Management of tracheomalacia in an infant with Tetralogy of Fallot

Most infants with tracheomalacia do not need specific therapy as it usually resolves spontaneously by the age of 1–2 years. Severe forms of tracheomalacia characterized by recurrent respiratory infections require active treatment which includes chest physiotherapy, long term intubation or tracheostomy. Aortopexy seems to be the treatment of choice for secondary and even primary forms of severe tracheomalacia. Itentails tracking and suturing the anterior wall of the aorta to the posterior surface of the sternum. Consequently, the anterior wall of the trachea is also pulled forward preventing its collapse. A 3-month-old girl baby who was on ventilatory support for 2 months due to severe tracheomalacia associated with a cyanotic congenital heart disease underwent intracardiac repair and aortopexy along with Lecompte's procedure as all the conservative measures to wean off the ventilator failed. The baby was extubated on the third post-operative day and the post-operative period was uneventful.

Aortopexy for innominate artery tracheal compression in children

OBJECTIVES

(1) Evaluate the presentation, diagnostic workup, and outcomes of contemporary surgical intervention for airway obstruction from innominate artery tracheal compression in children. (2) Assess the significance of synchronous airway lesions in the treatment of innominate artery tracheal compression.

STUDY DESIGN

Case series with chart review.

SETTING

Tertiary care children's hospital.

METHODS

This study is a retrospective medical record review of 26 consecutive children who underwent aortopexy for innominate artery tracheal compression at a tertiary care children's hospital. Presenting symptoms, diagnostic workup, presence of synchronous airway lesions, length of hospitalization, and treatment outcomes were examined.

RESULTS

Twenty-six patients (17 male, 65%) were included in the study. All were diagnosed with bronchoscopy and confirmed with radiographic imaging. Median age at diagnosis and surgery was 9.7 and 10.0 months, respectively. Presenting symptoms included noisy breathing (93%), cough (78%), dyspnea (44%), apnea (44%), cyanosis (19%), and recurrent respiratory infections (15%). Average degree of tracheal compression was 71% (SD, 12%). Fifteen of 26 (58%) patients had synchronous airway lesions, including mild laryngomalacia and subglottic stenosis. Median length of stay was 2 days. Median follow-up was 10 months. Subjective improvement occurred in all 21 patients for whom follow-up information was available.

CONCLUSION

Anterior tracheal vascular compression can cause a variety of airway symptoms. Mild synchronous airway lesions are common and do not prevent successful aortopexy. Aortopexy is a viable treatment option for symptomatic anterior tracheal vascular compression from the innominate artery.

Advanced large airway CT imaging in children: evolution from axial to 4-D assessment

Continuing advances in multidetector computed tomography (MDCT) technology are revolutionizing the non-invasive evaluation of congenital and acquired large airway disorders in children. For example, the faster scanning time and increased anatomical coverage that are afforded by MDCT are especially beneficial to children. MDCT also provides high-quality multiplanar 2-dimensional (2-D), internal and external volume-rendering 3-dimensional (3-D), and dynamic 4-dimensional (4-D) imaging. These advances have enabled CT to become the primary non-invasive imaging modality of choice for the diagnosis, treatment planning, and follow-up evaluation of various large airway disorders in infants and children. It is thus essential for radiologists to be familiar with safe and effective techniques for performing MDCT and to be able to recognize the characteristic imaging appearances of large airway disorders affecting children.

Multidetector computed tomography of pediatric large airway diseases: state-of-the-art

Advances in multidetector computed tomography (MDCT) technology have given rise to improvements in the noninvasive and comprehensive assessment of the large airways in pediatric patients. Superb two-dimensional and three-dimensional reconstruction MDCT images have revolutionized the display of large airways and enhanced the ability to diagnose large airway diseases in children. The 320-MDCT scanner, which provides combined detailed anatomic and dynamic functional information assessment of the large airways, is promising for the assessment of dynamic large airway disease such as tracheobronchomalacia. This article discusses imaging techniques and clinical applications of MDCT for assessing large airway diseases in pediatric patients.

Tracheal stenosis treated by division of the brachiocephalic artery: Report of a case

Tracheal stenosis of the brachiocephalic artery (BCA) is rare, and no definitive treatment protocol has yet been established. Brachiocephalic artery compression of the trachea is also relatively rare. This report presents a case of tracheal stenosis treated by division of the BCA. A 29-year-old woman was admitted because of stridor. Computed tomography (CT) revealed tracheal stenosis caused by compression of the BCA. Brachiocephalic artery suspension or aortopexy was not indicated because she had a thoracic deformity. Therefore, the BCA was divided. The operation was achieved without complications such as ischemia of the right arm or stroke. The stenosis of the trachea was improved. Division of the BCA can be an effective alternative procedure when the tracheal stenosis is caused by the BCA.

Tracheobronchomalacia in infants and children: multidetector CT evaluation

Tracheobronchomalacia (TBM) is the most common congenital central airway anomaly, but it frequently goes unrecognized or is misdiagnosed as other respiratory conditions such as asthma. Recent advances in multidetector computed tomography (CT) have enhanced the ability to noninvasively diagnose TBM with the potential to reduce the morbidity and mortality associated with this condition. Precise indications are evolving but may include symptomatic pediatric patients with known risk factors for TBM and patients with otherwise unexplained impaired exercise tolerance; recurrent lower airways infection; and therapy-resistant, irreversible, and/or atypical asthma. With multidetector CT, radiologists can now perform objective and quantitative assessment of TBM with accuracy similar to that of bronchoscopy, the reference standard for diagnosing this condition. Multidetector CT enables a comprehensive evaluation of pediatric patients suspected of having TBM by facilitating accurate diagnosis, determining the extent and degree of disease, identifying predisposing conditions, and providing objective pre- and postoperative assessments. In this article, the authors present a step-by-step primer of multidetector CT imaging for evaluating infants and children with suspected TBM, including clinical indications, patient preparation, multidetector CT techniques and protocols, two- and three-dimensional processing of multidetector CT data, and image interpretation. The major aim of this article is to facilitate the reader's ability to successfully employ multidetector CT imaging protocols for evaluation of TBM in infants and children in daily clinical practice.

A new technique for treatment of tracheal compression by the innominate artery: external reinforcement with autologous cartilage graft and muscle flap suspension

We report a new technique for treatment of tracheomalacia or tracheal compression caused by the innominate artery, utilized in two patients with neuromuscular disorders. Both cases developed a chest deformity in the setting of severe scoliosis. Computed chest tomography and fiberoptic bronchoscopy showed that the cervical trachea was compressed between the innominate artery and the cervical spine in the setting of deformity of the thoracic cavity. Both patients required prolonged mechanical ventilation prior to the operative procedure. To relieve compression by the innominate artery, the superior mediastinum was exposed by resection of part of the manubrium allowing a greater space, and external stenting of the cervical trachea with a reinforcing autologous cartilage graft and tracheopexy, as well as anterior suspension of the innominate artery with a sternohyoid muscle flap were carried out. Both patients were successfully weaned from prolonged mechanical ventilation. Resection of the manubrium sterni, tracheal stenting with rib segments and use of the strap muscle to elevate the innominate artery off of the trachea offer potential long-term release of airway obstruction.

Multistage Approach for Tracheobronchomalacia Caused by a Chest Deformity in the Setting of Severe Scoliosis

We present a case of tracheobronchomalacia caused by thoracic morphologic changes associated with severe scoliosis. The patient underwent fundoplication for gastroesophageal reflux. After the operation, the patient developed clinically significant tracheobronchomalacia. Tracheobronchial reinforcement and splinting with autologous cartilage grafts was initially performed to externally stent the trachea. Next, tracheopexy of the intrathoracic trachea and sternal elevation was performed using a pectus bar to correct the tracheal compression between the sternum and the spine. Because the cervical trachea was compressed between the innominate artery and the cervical spine, external stenting and tracheopexy of the cervical trachea as well as anterior suspension of the innominate artery were performed. At present, the patient has a Tracheostoma Retainer in place and is being followed as an outpatient without the need for mechanical ventilation. Multistaged techniques for tracheobronchomalacia because of an abnormal chest configuration therefore offer the potential to achieve the long-term release of airway obstruction.

Tracheomalacia and Tracheobronchomalacia in Children and Adults

Tracheomalacia and tracheobronchomalacia are disorders that are encountered in both pediatric and adult medicine. Despite increasing recognition of these disease processes, there remains some uncertainty regarding their identification, causes, and treatment. This article is intended to be a comprehensive review of both the adult and pediatric forms of the diseases, and includes sections on the historical aspects of the disorders, and their classification, associated conditions, histopathology, and natural history. We also review the various modalities that are used for diagnosis as well as the state of the art of treatment, including airway stent placement and surgical intervention.

Innominate Artery Compression of the Trachea: An Unusual Cause of Apnea in a 12-Year-Old Boy

Innominate artery compression of the trachea is a common cause of airway obstruction in infants and young children. The clinical significance of this lesion, even when compression is documented endoscopically or radiographically, is controversial. Obstructive respiratory symptoms occur in only a fraction of such cases, and symptomatic patients are most commonly detected in the first year of life. We present a case of a 12-year-old boy with a chief complaint of progressive stridor and apnea who was diagnosed with symptomatic innominate artery compression of the trachea. We reviewed the literature regarding the pathology, diagnosis, and treatment of this condition.

Congenital Heart Surgery Nomenclature and Database Project: vascular rings, tracheal stenosis, pectus excavatum

The extant nomenclature for vascular rings, tracheal stenosis, and pectus deformities is reviewed for the purpose of establishing a unified reporting system. The subject was debated and reviewed by members of the STS-Congenital Heart Surgery Database Committee and representatives from the European Association for Cardiothoracic Surgery. All efforts were made to include all relevant nomenclature categories using synonyms where appropriate. Vascular rings are subclassified as double aortic arch, right arch/left ligamentum, pulmonary artery sling, and innominate compression. Tracheal stenosis is subclassified as congenital complete tracheal rings (localized or long-segment) or acquired postintubation types. Pectus deformities are subclassified as pectus excavatum and carinatum (mild, moderate, severe). A comprehensive database set is presented which is based on a hierarchical scheme. Data are entered at various levels of complexity and detail which can be determined by the clinician. These data can lay the foundation for comprehensive risk stratification analyses. A minimum database set is also presented which will allow for data sharing and would lend itself to basic interpretation of trends. Outcome tables relating diagnoses, procedures, and various risk factors are presented.