[Practical interest of the determination of urinary fibrin degradation products in the early monitoring of kidney transplants].

We studied daily urinary excretion of fibrin degradation products (UFDP) during the first month following renal transplantation in 31 patients using the Merskey technique. Passed the 48 first hours a rise of UFDP was observed in 3 circumstances: 1) acute rejection: twenty four acute rejections were observed in twenty two patients. The increase of UFDP was constant. It preceded the clinical diagnosis of rejection in 63 p. 100 of the patients. It has a predictive value in all cases. 2) Severe urinary infection. In 5 patients with urologic complications UFDP rose markedly. 3) Macroscopic hematuria. In 2 patients with gross hematuria very high rates of excretion were observed.