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  • Title: Intrarenal manometry in the diagnosis of acute rejection superimposed on acute tubular necrosis in renal transplantation.
    Author: García R, Rodríguez-Iturbe B, Henríquez-La Roche C, Marín C, Mosquera J.
    Journal: Clin Nephrol; 1989 Jul; 32(1):21-6. PubMed ID: 2667825.
    Abstract:
    We used fine-needle intrarenal manometry as a guide for detection of acute rejection superimposed on protracted oliguric acute tubular necrosis occurring in the postoperative course of human renal transplantation. We followed intrarenal pressure (IRP) in 31 patients who received 32 renal transplants, 12 from living related donors and 20 from cadaveric donors. There were 19 rejection episodes and 10 episodes of transient cyclosporin A (CyA) nephrotoxicity. Nine patients had posttransplant acute renal failure. Levels of IRP (mmHg) in acute rejection were (mean +/- SD) 48.6 +/- 11.1, significantly higher (p less than 0.001) than the levels in CyA nephrotoxicity (28.2 +/- 5.21), acute tubular necrosis (24.5 +/- 5.5) and normal functioning grafts (26.4 +/- 6.63). Antirejection treatment was associated with return to normal of IRP after 10 days. Intrarenal manometry was performed routinely ever 2-3 days in patients who had postoperative acute renal failure. Increments in IRP were detected on the 7-10th postoperative day in 7 patients who had 10-25 days of post-transplant oliguria. Renal biopsy findings were compatible with acute rejection, and the patients responded to intravenous bolus of steroids. We suggest that fine-needle intrarenal manometry is a reliable test for the detection of acute rejection in circumstances when traditional parameters of altered renal function cannot be evaluated.
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