CPT® Code 49040

A subdiaphragmatic abscess refers to a localized collection of pus that forms in the abdominal cavity beneath the diaphragm, while a subphrenic abscess is situated above the diaphragm in the anatomical space that separates the thoracic cavity from the abdominal cavity. These abscesses can arise due to various underlying conditions, such as infections, perforations, or post-surgical complications. The procedure for drainage involves accessing the abscess through various approaches, including transpleural, extrapleural, retroperitoneal (extraperitoneal), or transperitoneal methods. During the procedure, the surgeon thoroughly explores the entire subdiaphragmatic or subphrenic cavity to locate the abscess. Once identified, any loculations within the abscess are separated, and all debris, which may consist of pus, blood, and necrotic tissue, is meticulously evacuated. To ensure complete removal of infectious material, the abscess site is irrigated vigorously with sterile saline or an antibiotic solution. Finally, a drain is placed within the abscess cavity to facilitate ongoing drainage, and the incision is closed around the drain to promote healing while allowing for continued monitoring and management of the abscess site.