Imaging

Subglottic Stenosis

Preliminary Diagnosis: Subglottic stenosis

I. What imaging technique is first-line for this diagnosis

  • Airway fluoroscopy.

II. Describe the advantages and disadvantages of this technique for diagnosis of subglottic stenosis.

Advantages

  • Fast, inexpensive imaging modality.

  • Exposes the patient to minimal ionizing radiation.

  • Highly sensitive for detecting subglottic stenosis.

Disadvantages

  • Limited in evaluating for any underlying laryngeal lesion.

  • Less specific in detecting subglottic stenosis than other imaging modalities

III. What are the contraindications for the first-line imaging technique?

  • No specific contraindications exist.

IV. What alternative imaging techniques are available?

  • CT with contrast

V. Describe the advantages and disadvantages of the alternative techniques for diagnosis of subglottic stenosis.

CT with contrast

Advantages

  • Highly sensitive and specific for evaluating for subglottic stenosis.

  • Able to detail and characterize any underlying laryngeal lesion with exquisite detail and accuracy.

Disadvantages

  • Exposes patients to ionizing radiation.

VI. What are the contraindications for the alternative imaging techniques?

CT with contrast

  • CT imaging may be contraindicated in pregnant patients.

  • Relative contraindication to contrast use in patients with renal failure

  • Relative contraindication to contrast use in patients with contrast allergy

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