Clinical Utility and Evolution of Donor Serum Lactate During Normothermic Regional Perfusion in Uncontrolled Donation After Circulatory Death.

BACKGROUND

Kidney transplantation from uncontrolled donor after circulatory death (uDCD) showed a higher incidence of delayed graft function and primary failure. The aim of this study was to study basal and kinetic evolution of lactate values in uDCD preserved on normothermic regional perfusion (NRP) as a predictive factor of kidney suitability exposed to prolong ischemic conditions.

METHODS

Descriptive and prospective study of a cohort of out-of-hospital cardiac arrest patients admitted to the emergency room as potential uDCD. Donors meeting the inclusion criteria were preserved on NRP for at least 2 hours before procurement. Serum lactate levels were determined at arrival as basal level and at 30 minutes intervals and compared with adequate renal perfusion in the operating room (OR).

RESULTS

Forty-five donors met inclusion criteria. Of these, 38 went to the OR (84.5%). No differences were found in basal lactate between accepted and rejected kidneys (203.08 ± 59.21 vs 175.43 ± 75.32 mg/dL, respectively); neither lactate, hematologic, hepatic transaminases, creatinine, or blood gas analysis sequential values evolved while on NRP. Lactate receiver operating characteristic curve failed to predict viability at different time points and did not correlate with the macroscopic kidney poor perfusion in the OR.

CONCLUSIONS

The baseline and kinetic evolution of plasma lactate values while on NRP, were not useful tools to predict the final OR kidney viability owing to previous severe ischemic insult.