TRANSIENT NEUROLOGIC SYMPTOMS AFTER SPINAL-ANESTHESIA

We recently reported several cases consistent with transient radicular irritation after spinal anesthesia with hyperbaric 5% lidocaine. The present prospective, blind, nonrandomized study was performed to deter mine the incidence of these transient neurologic symptoms and to ident ify factors that might be associated with their occurrence. We studied 270 patients scheduled for gynecologic or obstetric procedures under spinal anesthesia. For spinal anesthesia, either 5% lidocaine in 7.5% glucose or 0.5% bupivacaine in 8.5% glucose was used. Patients were ev aluated on postoperative day 3 by a quality assurance nurse who was un aware of the drug given or details of the anesthetic technique. Transi ent neurologic symptoms were observed in 37% of patients receiving 5% lidocaine, whereas only one patient receiving 0.5% bupivacaine had tra nsient hypesthesia of the lateral aspect of the right foot, These resu lts suggest that symptoms were the result of a specific drug effect. H owever, because of the limitations of the study one cannot conclude th at lidocaine per se was the cause.