Airway compression diagnoses
An extrinsic airway compression could have a vascular cause or could result from pressure by an extrinsic mass or the axial skeleton.
Vascular compression usually occurs due to abnormal vasculature development, particularly with vascular stents, Dr. Hysinger said. The wheezing presents with stridor, feeding intolerance, recurrent infections, and cyanotic episodes. The work-up should include a chest x-ray, bronchoscopy, and a chest CT and/or MRI. A variety of interventions may be necessary to treat it, including an aortopexy, pulmonary artery trunk–pexy, arterioplasty, vessel implantation, or endobronchial stent. Residual malacia may remain after treatment, however.
The most common reasons for airway compression by some kind of mass is a reactive lymphadenopathy, a tumor, or an infection, including tuberculosis or histoplasmosis. Severe narrowing of the airway can lead to respiratory failure, but because the compression can develop slowly, the wheezing can be mistaken for asthma. In addition to a chest CT and bronchoscopy, a patient will need other work-ups depending on the cause. Possibilities include a biopsy, a gastric aspirate (for tuberculosis), a bronchoalveolar lavage, or antibody titers.
Similarly, because therapeutic intervention requires treating the underlying infection, specific treatments will vary. Tumors typically will need resection, chemotherapy, and/or radiation – and, until the airway is fully cleared, the patient may need chronic mechanical ventilation.
Children with severe scoliosis or kyphosis are those most likely to experience airway compression resulting from pressure by the axial skeleton, in which the spine’s curvature directly presses on the airway. In addition to the wheeze, these patients may have respiratory distress or recurrent focal pneumonia, Dr. Hysinger said. The standard work-up involves a chest x-ray, chest CT, spinal MRI, and bronchoscopy.
Consider using spinal rods, but they can both help the condition or potentially exacerbate the compression, Dr. Hysinger said. Either way, children also will need help with airway clearance and coughing.
Dr. Hysinger concluded by reviewing what you may consider changing in your current practice, including the initial trial of bronchodilators, a chest x-ray, and a subspecialist referral.
No funding was used for this presentation, and Dr. Hysinger reported having no relevant financial disclosures.