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Background  Percutaneous catheter drainage is an effective therapy for antibiotic-refractory lung abscesses. Pulmonary resection is usually considered in cases of drainage failure, although it remains controversial.    Case presentation  A 42-year-old man with antibiotic-refractory lung abscess underwent percutaneous abscess drainage with a 10-Fr pigtail catheter. However, adequate evacuation of the abscess content was not achieved, and his respiratory condition worsened and he required a ventilator. To achieve and maintain effective drainage, insertion of a larger size 28-Fr catheter to replace the 10-Fr catheter was performed under general anesthesia and one-lung ventilation with a double-lumen tube to isolate the left lung. Exchange with a larger size catheter was effective and achieved adequate drainage. The procedure was performed safely by expanding the route of the old catheter as a guide for accessing the abscess cavity. His condition immediately improved and he was discharged on day 40 post-catheter exchange with no complications and cured with a small residual thin wall cavity.    Conclusions  Small size catheters are generally recommended for initial percutaneous drainage; however, we argue that exchange with larger size catheters should be primarily considered instead of pulmonary resection in cases of initial drainage failure. This may avoid the need for pulmonary resection.

Effective exchange to a larger size catheter for a lung abscess with initial percutaneous drainage failure: a case report