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Modified computed tomography peritoneography: clinical utility in continuous ambulatory peritoneal dialysis patients.

The purpose of the present paper is to review the indications, results, clinical correlation and implications for management of a modified CT peritoneography (CTP) technique in the evaluation of continuous ambulatory peritoneal dialysis (CAPD) patients. Forty CTP in 33 patients were reviewed by two observers blinded to clinical history or outcome. The CTP technique included 100 mL non-ionic intraperitoneal contrast, 1 h of ambulation and prone positioning during the CT. No precontrast or delayed examinations were performed. A CAPD-related complication was diagnosed in 33 of 40 (82%) CTP. Twenty-nine CTP were performed for evaluation of suspected dialysate leaks. In this group there were 18 leaks, a total of seven umbilical hernias (five as isolated findings) and five normal studies. Nine of 18 (50%) leaks resolved with conservative management and six of nine patients (67%) of the remainder continued CAPD after appropriate surgery. Seven patients were evaluated for scrotal swelling (one bilateral), and there were five communicating hydroceles (all with inguinal fat herniation and all surgically confirmed) and three non-communicating hydroceles (none of which progressed). Umbilical hernias were present in nine of 33 patients (27%). No false positive or false negative studies were identified. The CTP technique described provides accurate diagnostic information in the management of common CAPD-related complications, particularly dialysate leak, genital swelling, abdominal wall hernias and peritoneal adhesions. Computed tomography peritoneography directs appropriate conservative or surgical management.