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© Borgis - New Medicine 4/2015, s. 119-121 | DOI: 10.5604/14270994.1191780
Monika Jabłońska-Jesionowska, *Lidia Zawadzka-Głos
Respiratory stridor in children due to congenital abnormalities of the great vessels
Department of Pediatric Otolaryngology, Medical University of Warsaw, Poland
Head of Department: Lidia Zawadzka-Głos, MD, PhD
Summary
Introduction. The respiratory stridor is a clinical symptom of airway obstruction; depending on the location of the pathology we distinguish between inspiratory, expiratory and mixed stridor. Due to the coexistence of congenital airway pathology, stridor is frequently mixed. The most common cause of congenital stenosis of the airways is laryngomalacia, followed by paralysis of the vocal cords and congenital stenosis of the cricoid cartilage. A rare but important causes of the airways narrowing in children are anomalies of the great vessels compressing the trachea and bronchi from the outside.
Aim. Aim of this study is to analyze the symptoms in children with respiratory stridor due to anomalies of the great vessels causing pressure on the respiratory tract from the outside.
Material and methods. Retrospective study involved a group of 110 children hospitalized in the Pediatric Otolaryngology Department Medical University of Warsaw in 2011-2014 years due to congenital respiratory stridor. During the diagnostics procedures following tests were made: chest X-ray, US of the larynx, US of the brain, X-ray of the esophagus with contrast, echocardiogram and laryngotracheoscopy under general anastesia, chest angio-CT, neurological and cardiac consultation.
Results. After analyzing of the cases, there has been found: laryngomalacia in 54, congenital paralysis of the vocal folds in 6, congenital stenosis of the cricoid cartilage in 5, hemangioma of the larynx in 5, laryngeal papilloma in 1, larynx cyst in 5, vascular ring in 31 cases. Identified as vascular rings include: double aortic arch –– 5 cases, right aortic arch – 6 cases, anomalies of brachiocephalic trunk – 5 cases, left aortic arch with right lusorian artery – 14 cases, pulmonary sling – 1 case. The clinical symptoms presented by children with rings: respiratory stridor, exercise stridor, silent cry, sleep apnea, cyanosis, dysphagia, recurrent infections of the inferior respiratory tract. The age of children diagnosed with vascular ring ranged from 1 week to 11 years.
Conclusions. 1. Congenital respiratory stridor always requires clinical interdisciplinary investigation. 2. Vascular anomalies are a major cause of congenital non-laryngeal respiratory stridor in children of all ages. 3. As a standard the endoscopy of the lower airways, not only the larynx but also trachea should be performed. 4. Lack of lower airways endoscopy in the diagnostic of congenital respiratory stridor can cause lack of recognition of vascular rings. 5. Deleted proper diagnosis of vascular anomalies can caused chronic changes in lower respiratory tract, weight and growth deficiency.
INTRODUCTION
Respiratory stridor is the clinical symptom and not a disease. This is the sound arised when air flows through narrowed airways. The pathology on the glottis level generates inspiratory stridor and around subglottis and trachea inspiratory-expiratory stridor (1). Airways narrowing may be due to the pathology in their interior or due to external pressure on the respiratory tract. The most common cause of congenital respiratory stridor is laryngomalacia called as congenital laxity of the larynx (2), then congenital vocal cord paralysis and congenital stenosis of the cricoid cartilage. Narrowing of the airways caused by external compression due to congenital vascular anomalies, referred as the vascular ring is very rare and is 0.7-1.3% of all congenital heart anomalies (3, 4). The ring is the result of anatomical abnormalities in the course of aorta and its branches, which cause various types of stenosis of the trachea and/or the esophagus. There are many anatomical variants of the vascular ring. The most common defect is a double aortic arch, further right aortic arch with aberrant left subclavian artery (5, 6). The clinical symptoms occur with varying intensity, depending on the degree of compression on the esophagus or the trachea in patients with vascular ring. Symptoms include: respiratory stridor, dysphagia, choking, recurrent respiratory tract infections, chronic cough (3, 5-8).
AIM
The aim of this study is to analyze the symptoms in children with respiratory stridor due to anomalies of the great vessels causing external pressure on the respiratory tract.
MATERIAL AND METHODS
In the Department of Pediatric Otolaryngology Medical University of Warsaw in 2011-2014 years 110 children were hospitalized because of an congenital respiratory stridor. During the diagnostic procedures in all children were made: perinatal anamnesis, pediatric examination, chest X-ray, larynx US and brain US, ECG and echocardiography in the case of the heart pathology in the pediatric examination, neurological examination in the case of brain US pathology. Measurement of 24 h blood oxygen saturation was control. Then in all 110 children laryngotracheoendoscopy under general anesthesia was performed. In 31 children after endoscopy chest CT angiography with contrast was performed, and in 31 children after endoscopy, barium swallow X-ray of the esophagus was performed.
RESULTS
After examining 110 children: congenital laxity of the larynx in 54 children, congenital vocal cord paralysis in 6 children, congenital stenosis of the cricoid cartilage in 5 children, hemangioma of the larynx in 4 children, laryngeal cysts in 5 children, laryngeal papilloma in 1 child, vascular ring in 31 children were recognized. The variety types of vascular anomalies were identified: a double aortic arch in 5, right aortic arch with aberrant left subclavian artery in 6, anomalies of brachiocephalic trunk in 5, left aortic arch with right lusorian artery in 14, pulmonary sling in 1. The types and number of vascular anomalies are shown in table 1.
Table 1. The types and numbers of vascular anomalies.
Type of vascular ring Number of children
A double aortic arch5
Right aortic arch with aberrant left subclavian artery6
Anomalies of brachiocephalic trunk5
Left aortic arch with right artery lusoria14
Pulmonary sling1

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Piśmiennictwo
1. Zawadzka-Głos L, Zając B, Chmielik M: Stridor krtaniowy u dzieci. Magazyn Otolaryngologiczny 2005; supl. VII: 15-21. 2. Zawadzka-Głos L, Zając B, Chmielik M, Badełek-Izdebska M: Zwężenie podgłośniowe krtani w aspekcie praktycznym. Nowa Pediatria 2005; 3: 105-107. 3. Sakakura K: Congenital laryngeal anomalies presenting as chronic stridor: a retrospective study of 55 patients. Auris nasus larynx 2008 Dec; 35(4): 527-533. 4. Jabłońska-Jesionowska M, Zawadzka-Głos L: Congenital respiratory stridor in children. New Medicine 2013; 4: 120-123. 5. Woods RK, Sharp RJ, Holcomb GW et al.: Vascular anomalies and tracheoesophageal compression: a single institution’s 25-year experience. Ann Thorac Surg 2001; 72: 434-439. 6. Skalski JH, Wites M, Haponiuk I: Pierścienie naczyniowe. Rozdz. 25: 361-373. 7. Bove T, Demanet H, Casimir G et al.: Tracheobronchial compression of vascular origin. J Cardiovasc Surg 2001; 42: 663-666. 8. Saji P, Shyh-Jye Ch, Wu M-H et al.: Retroespohageal aortic arch: diagnostic and therapeutic implications of a rare vascular ring. Int J of Cardiol 2001; 79: 133-141. 9. Jeeyani HN, Prajapati VJ, Patel NH, Shah SB: Imaging features of double aortic arch shown by multidetector computed tomography angiography. Ann Pediatr Cardiol Jul-Dec 2010; 3(2): 169-170.
otrzymano: 2015-10-12
zaakceptowano do druku: 2015-11-30

Adres do korespondencji:
*Lidia Zawadzka-Głos
Department of Pediatric Otolaryngology Medical University of Warsaw
24 Marszałkowska Str., 00-576 Warsaw, Poland
tel./fax: +48 (22) 628-05-84
e-mail: laryngologia@litewska.edu.pl

New Medicine 4/2015
Strona internetowa czasopisma New Medicine