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Vascular compression of the airway: establishing a functional diagnostic algorithm
Derek J Rogers1, Mary Beth Cunnane, Christopher J Hartnick
1Departments of Pediatric Otolaryngology, Massachusetts Eye and Ear Infirmary, Boston, MA 02114, USA.
Insights
Computed tomography with angiography (CTA) identified vascular anomalies in 50% of pediatric patients with airway symptoms. Half of these required surgery, highlighting the need for a diagnostic algorithm to balance imaging risks with clinical benefits.
Area of Science:
- Pediatric radiology
- Thoracic surgery
- Vascular anomalies
Background:
- Pediatric imaging, including computed tomography with angiography (CTA), carries radiation exposure risks.
- Children often undergo CTA after bronchoscopy for airway symptoms, but the necessity of this imaging is not always clear.
Purpose of the Study:
- To evaluate the utility of CTA in pediatric patients with airway symptoms following bronchoscopy.
- To determine the rate of positive CTA findings leading to surgery.
- To propose a diagnostic algorithm balancing imaging risks with clinical benefits.
Main Methods:
- Retrospective review of 42 pediatric patients (2 months to 11 years) with tracheomalacia who underwent CTA.
- Data collected included bronchoscopy findings, CTA results, and need for thoracic surgery.
Main Results:
- 50% of patients had a vascular anomaly detected by CTA.
- Innominate artery compression was the most common anomaly (81% of positive cases).
- 29% of patients with vascular anomalies required thoracic surgery due to symptoms like cough, cyanosis, and stridor.
Conclusions:
- CTA is valuable in diagnosing vascular anomalies in pediatric patients with airway symptoms.
- A diagnostic algorithm can help optimize patient care by considering radiation and sedation risks.
- Further research is needed to refine decision-making for imaging in this population.
Importance:
Pediatric imaging carries the risk of radiation exposure. Children frequently undergo computed tomography with angiography (CTA) for findings on bronchoscopy with limited knowledge regarding the necessity of such imaging.
Objective:
To report our experience with all pediatric patients at our institution over an 8-year period with airway symptoms warranting bronchoscopy followed by CTA for potential vascular anomaly. Goals were to report the percentage of positive findings seen on CTA leading to surgery; discuss relative radiation exposure risk and sedation risk for additional radiologic studies; and propose a functional diagnostic algorithm.
Design, Setting, And Participants:
Retrospective chart review of 42 children aged 2 months to 11 years with tracheomalacia who underwent CTA between 2004 and 2012 in our tertiary aerodigestive center.
Interventions:
Bronchoscopy and CTA.
Main Outcomes And Measures:
Presence of vascular anomaly and need for thoracic surgery.
Results:
Of these 42 children, 21 (50%) had a vascular anomaly identified on CTA. Of these 21, 17 (81%) had innominate artery compression; 1 (5%) had double aortic arch; 1 (5%) had right aortic arch; 3 (14%) had bronchial compression by pulmonary artery; and 1 (5%) had dextrocardia with duplicated vena cava. Six (29%) of these 21 had clinical symptoms and CTA findings requiring thoracic surgery. The most common symptoms in children requiring thoracic surgery were cough, cyanosis, and stridor.
Conclusions And Relevance:
Deciding when to obtain imaging for bronchoscopic findings suggestive of vascular compression remains challenging. A diagnostic algorithm is proposed as a means to provide the best clinical care while weighing risks of additional radiation exposure vs sedation and exposure to general anesthesia.
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