[Sterile peritonitis after administration of icodextrin]

Icodextrin is an 7.5% isoosmotic solution of the glucose polymer maltodextrin, recently frequently used in continuous ambulatory peritoneal dialysis (CAPD). It improves ultrafiltration and decreases glucose absorption. Among side effects of icodextrin, skin reactions and sterile peritonitis have been described. The authors present two cases of sterile peritonitis after icodextrin.

In these two patients, the adverse events included peritoneal reaction to icodextrin solution. The reaction did not occur immediately after the initial administration of icodextrin, but after 70 (case 1) and 412 days (case 2) of regular use. This reaction to icodextrin solution resembled chemical peritonitis, however, the clinical picture was not absolutely typical of bacterial peritonitis either. Both patients had cloudy dialysate, elevated WBC in dialysate, no microorganisms were isolated, and no signs of allergic reaction could be detected. The clinical course was characterized by rapid remission upon isodextrin withdrawal. One patient received empiric antibiotic therapy, the other did not. Upon switching from icodextrin to glucose-based dialysate, the two patients were not challenged to icodextrin, and were doing well, without any symptoms of peritonitis.

The icodextrin solution contains an isoosmolar glucose polymer which allows longterm stable ultrafiltration. Among side effects, cutaneous reactions have been described (exfoliative, in the form of vesicles, psoriatic plaque or generalized exanthema in the form of pustules), which may occur in as many as 15% of patients. These symptoms and signs disappear upon discontinuation of icodextrin. Icodextrin side effects also include mild abdominal pain, allergic and hypersensitivity reactions, and recently sterile peritonitis. The patients described developed a clinical picture suggestive of chemical peritonitis. From the effluent no microorganisms were isolated, and the clinical picture was not absolutely typical of bacterial peritonitis either. Discontinuation of icodextrin was followed by immediate clearing of the effluents and normalization of WBC count.