Effect of chronic bupivacaine infusion on seizure threshold to bupivacaine.
Thirty rats were pretreated with a continuous infusion of bupivacaine or placebo. On the fourth day the acute seizure threshold to bupivacaine was determined for both groups. The seizure dose, blood and brain concentration of bupivacaine showed no difference between the groups. The tachyphylaxis seen clinically when bupivacaine is used for a regional nerve blockade does not seem to evolve for the CNS-effects.
D000818:Animals; D001921:Brain / Q000378:metabolism; D002045:Bupivacaine / Q000008:administration & dosage* / Q000097:blood / Q000378:metabolism / Q000494:pharmacology; D004056:Differential Threshold; D007260:Infusion Pumps; D009994:Osmolar Concentration; D051381:Rats; D012640:Seizures / Q000139:chemically induced*; D013997:Time Factors
D002045:Bupivacaine