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Clinical Aerosol Inhalation Cine-scintigraphy to Evaluate Mucociliary Transport System in Diffuse Panbronchiolitis

Departments of Oncoradiology and Radiology, and 2nd Department of Internal Medicine, Nara Medical University, Kashihara, Japan

Correspondence: For correspondence or reprints contact: Teruhiko Imai, MD, Department of Oncoradiology, Nara Medical University, 840 Shijyo-cho, Kashihara City, Nara Prefecture, 634, Japan

ABSTRACT

This study evaluates the mucociliary transport system in patients with diffuse panbronchiolitis using aerosol inhalation cine-scintigraphy (AICS). Methods: Forty-one subjects, 10 healthy controls and 31 patients with diffuse panbronchiolitis, were studied. In addition, the mucociliary transport system was evaluated in 11 patients who had received erythromycin therapy for 3–8.3 yr. Following inhalation of ^99mTc-human serum albumin aerosol for 3–5 min in a sitting position, the subjects were placed on the imaging table in the supine position and posterior images were obtained dynamically for 20 sec/frame over 2 hr with a gamma camera linked to a digital computer. The 360 20-sec serial frames were edited into a cinematographic presentation at 200-msec intervals. Clinical evaluation of the mucociliary transport system was based on the bolus movement of radioactive aerosol from the main bronchi to the trachea and the movement patterns, which were divided into four types using the movement in the controls as a standard (type I): type I, rapid and smooth movement; type II, slow movement; type III, stagnation at the carina; and type IV, complete stasis. Results: All patients with diffuse panbronchiolitis had types III and IV, indicating that mucociliary transport system was severely impaired. Of the 11 patients on erythromycin therapy, 8 had movement pattern type IV and 3 had movement pattern type III before erythromycin therapy. In eight patients (72.7%), movement pattern was improved to type I or II after therapy. Conclusion: Aerosol inhalation cine-scintigraphy helps evaluate the clinical usefulness of erythromycin therapy in diffuse panbronchiolitis.

Key Words: mucociliary transport system • diffuse panbronchiolitis • aerosol inhalation cine-scintigraphy • erythromycin

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