Steroid Coverage for CT Scan in Asthmatic Patients

Indications for Steroid Premedication

• The American College of Radiology recommends premedication with steroids for patients with a known severe allergy to iodinated contrast 1

Management of Asthma During CT Scanning

• For acute asthma exacerbation, administer systemic corticosteroids, such as prednisolone 40-60 mg PO or hydrocortisone 200 mg IV q6hr, for the asthma itself, not for contrast prophylaxis 2
• For stable asthma, continue maintenance inhaled corticosteroids, and no additional steroids are needed for contrast 3, 4
• Ensure bronchodilator availability during the scan 3

CT Imaging Considerations in Asthmatics

• The American College of Radiology Appropriateness Criteria suggest chest radiography as the initial imaging modality for asthma complications, such as pneumothorax, which occurs in 0.5-2.5% of admitted status asthmaticus patients 5, 1
• CT without contrast may be warranted if chest X-ray is negative or equivocal and pneumonia or pneumothorax is suspected 5, 6
• CT with contrast has no specific role in routine asthma imaging 1, 7

Common Pitfalls to Avoid

• Do not confuse asthma treatment with contrast prophylaxis, as these require separate clinical decision-making 3, 2
• Do not delay systemic corticosteroids if the patient has an acute asthma exacerbation requiring treatment independent of the CT scan 3, 2