Sixty patients were studied with ventilation-perfusion (V-P) lung scans for suspected bronchlectasis. Bronchography showed bronchlectatic changes in 51 patients. Lobar and segmental matched defects were seen on V-P scans in 53 patients, of which only 46 were true positives (sensitivity 90percnt;). V-P lung scans showed the site and extent of bronchlectatic lesions; 48 (72.7percnt;) in the left lung and 18 (27.3percnt;) in the right lung. Detection of associated chronic obstructive airway disease by V-P scans in 17 patients had prognostic value in postsurgery recovery time and improvement of symptoms. This may be a potential new application to the routine use of V-P lung scan in the presurgery work-up of patients with bronchlectasis. Our results showed that bronchography should not be performed on patients with preserved lung perfusion.
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