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  • Title: Peritoneal resting with heparinized lavage reverses peritoneal type I membrane failure. A comparative study of the resting effects on normal membranes.
    Author: De Sousa E, Del Peso G, Alvarez L, Ros S, Mateus A, Aguilar A, Selgas R, Bajo MA.
    Journal: Perit Dial Int; 2014; 34(7):698-705. PubMed ID: 25292401.
    Abstract:
    BACKGROUND: Ultrafiltration failure (UFF) is a serious complication of long-term peritoneal dialysis (PD). Peritoneal rest (PR) has been demonstrated as a valid treatment to reverse the functional changes that occur in UFF. The effects of PR on a normally functioning human peritoneum are unknown but are expected to be neutral. Our hypothesis was that PR positively modifies peritoneal function in patients with UFF, in contrast to the absence of effects when PR is applied under normal conditions. PATIENTS AND METHODS: We studied 84 PR periods, comparing 35 patients with UFF and 49 controls (resting for abdominal surgery with temporary discontinuation of PD). We analyzed peritoneal transport pre-PR and post-PR by calculating the mass transfer coefficients of creatinine (Cr-MTAC), the dialysate/plasma creatinine ratio (D/P Cr) and the ultrafiltration (UF). RESULTS: Baseline data was similar for the 2 groups, although the UFF group had a longer median time in PD (39 [18 - 60] vs 10 [5 - 23] months; p = 0.00001). Peritoneal rest induced a decrease in D/P Cr, Cr-MTAC and an increase in UF capacity in the UFF group (p = 0.0001, p = 0.004 and p = 0.001, respectively), without causing changes in the control group. Peritoneal rest in patients with more than 6 months of UFF was not able to reduce peritoneal solute transport or improve UF capacity. Response to PR did not differ among UFF patients with or without a previous history of peritonitis. Peritoneal rest enabled patients with UFF to continue on PD for a median time of 23 months (range, 13 - 46 months). CONCLUSIONS: Peritoneal rest induces functional changes in patients with UFF but not in those with no functional abnormalities. This demonstrates that PR works only when abnormal but reversible functional conditions are present. However, the effect is highly dependent on how early PR is applied.
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