Anestesia epidural: dosis test intravascular simulada con S(+)-ketamina, lidocaína y adrenalina. Estudio prospectivo, aleatorizado, doble ciego, controlado con placebo

Both lidocaine an adrenaline at the scheduled doses showed low sensitivity and specificity as a simulated iv epidural test dose. S(+)-ketamine could be a feasible marker after accidental iv injection during epidural anaesthesia or analgesia.