Randomized Trial of Machine Perfusion Versus Cold Storage in Recipients of Deceased Donor Kidney Transplants With High Incidence of Delayed Graft Function.

BACKGROUND: This study compared the use of static cold storage versus continuous hypothermic machine perfusion in a cohort of kidney transplant recipients at high risk for delayed graft function (DGF). METHODS: In this national, multicenter, and controlled trial, 80 pairs of kidneys recovered from brain-dead deceased donors were randomized to cold storage or machine perfusion, transplanted, and followed up for 12 months. The primary endpoint was the incidence of DGF. Secondary endpoints included the duration of DGF, hospital stay, primary nonfunction, estimated glomerular filtration rate, acute rejection, and allograft and patient survivals. RESULTS: Mean cold ischemia time was high but not different between the 2 groups (25.6 ± 6.6 hours vs 25.05 ± 6.3 hours, 0.937). The incidence of DGF was lower in the machine perfusion compared with cold storage group (61% vs. 45%, P = 0.031). Machine perfusion was independently associated with a reduced risk of DGF (odds ratio, 0.49; 95% confidence interval, 0.26-0.95). Mean estimated glomerular filtration rate tended to be higher at day 28 (40.6 ± 19.9 mL/min per 1.73 m2 vs 49.0 ± 26.9 mL/min per 1.73 m2; P = 0.262) and 1 year (48.3 ± 19.8 mL/min per 1.73 m2 vs 54.4 ± 28.6 mL/min per 1.73 m2; P = 0.201) in the machine perfusion group. No differences in the incidence of acute rejection, primary nonfunction (0% vs 2.5%), graft loss (7.5% vs 10%), or death (8.8% vs 6.3%) were observed. CONCLUSIONS: In this cohort of recipients of deceased donor kidneys with high mean cold ischemia time and high incidence of DGF, the use of continuous machine perfusion was associated with a reduced risk of DGF compared with the traditional cold storage preservation method.

Mortalidade e prognóstico específico em pacientes com insuficiência renal aguda / Assessment of mortality and specific index in acute renal failure

Vários sistemas de estratificação de risco têm sido estudados com o objetivo de predizer a evolução de pacientes graves com insuficiência renal aguda (IRA). OBJETIVOS: Avaliar e comparar as taxas de mortalidade e o escore de severidade individual de necrose tubular aguda (ATN-ISS) em pacientes que desenvolveram IRA tratados em hospital universitário de atendimento predominantemente terciário. MÉTODOS: Foram estudados prospectivamente 103 pacientes com IRA por necrose tubular aguda (NTA), atendidos no Hospital das Clínicas da Faculdade de Medicina de Botucatu - UNESP, acompanhados até recuperação do quadro renal ou óbito. No momento da primeira avaliação do nefrologista foi aplicado o escore ATN-ISS. Os resultados foram apresentados em média ± desvio padrão ou mediana, com nível de significância de 5 por cento. RESULTADOS: Verificamos que 51,4 por cento eram do sexo masculino, com média de idade de 58 ± 36 anos. A mortalidade geral foi de 44,3 por cento, sendo estatisticamente maior nos pacientes provenientes de enfermarias cirúrgicas (52,7 por cento) quando comparados àqueles de enfermarias clínicas (35,3 por cento), e naqueles que realizaram diálise (63,8 por cento) quando comparados aos de tratamento conservador (23,5 por cento). O escore ATN-ISS apresentou boa confiabilidade, com elevado poder discriminatório (área sob a curva de 0,95) e boa calibração, principalmente a partir do quintil 3. CONCLUSÃO: Na população estudada, as taxas de mortalidade foram semelhantes àquelas encontradas na literatura. O escore ATN-ISS mostrou ser um índice prognóstico com grande confiabilidade, podendo ser aplicado na prática diária do nefrologista.

[Assessment of mortality and specific index in acute renal failure]. / Mortalidade e prognóstico específico em pacientes com insuficiência renal aguda.

UNLABELLED: A variety of systems of risk factor stratification have been studied to predict the outcome in acute renal failure (ARF). OBJECTIVES: Assess and compare mortality and the Acute Tubular Necrosis Individual Severity Score (ATN-ISS) in patients with AFR treated in a university hospital. METHODS: A prospective analysis was made of 103 patients with a diagnosis of intrinsic ARF admitted to the Hospital das Clinicas da Faculdade de Medicina de Botucatu, UNESP. Patients were followed up until recovery of renal function or death. The Score ATN-ISS was recorded during the first hours of the assessment by a nephrologist. Results were reported as median or mean +/- SD, with statistical significance of p < 0.05. RESULTS: Fifty-one percent of patients were male with a mean age of 58 +/- 36 years. Forty-four percent died in the hospital. Mortality was higher in patients from the surgical wards (52.7%) and in patients who were treated with dialysis (63.8%). The score ATN-ISS showed a good confidence level, with high discriminatory power (area under the curve of 0.95) and good accuracy. CONCLUSIONS: Mortality in this study was comparable to that found in literature. The ATN-ISS was shown to be a prognostic index with a high confidence level that could be routinely applied by nephrologists to patients with AFR.