Hemodynamic effects of interpleural lidocaine and bupivacaine combination in anesthetized dogs with and without an open pericardium.
OBJECTIVE
To identify dysrhythmias and hemodynamic changes after lidocaine and bupivacaine infusion into the interpleural space with an open pericardium.


METHODS
Experimental study.


METHODS
Six adult dogs.


METHODS
Systemic arterial pressure and electrocardiogram were recorded. A 7.5 Fr Swan-Ganz catheter was advanced to the level of the main pulmonary artery to record pulmonary arterial pressure. Cardiac output was measured by a thermodilution technique. A pericardial window (PW) was performed in 3 dogs using thoracoscopy. Hemodynamic variables were recorded before and 15 minutes after injection of lidocaine (1.5 mg/kg) and bupivacaine (1.5 mg/kg) into the pleural space in the control group and in the pericardial space for the PW group. A randomized-block ANOVA for repeated measures was used to evaluate the effect of local anesthetic administration on hemodynamic and electrophysiologic variables in dogs with a pericardectomy.


RESULTS
Each dog maintained sinus rhythm. Infusion of local anesthetic induced a significant increase in right ventricular diastolic pressure (P = .002) and a significant decrease in stroke volume (P = .047) in both groups; however, the effects were not significantly different between groups.


CONCLUSIONS
Infusion of lidocaine and bupivacaine, either intrapleural or in the pericardial space, had a mild detrimental effect on cardiac output.


CONCLUSIONS
Intrapleural administration of lidocaine and bupivacaine at a therapeutic dose can be used safely in healthy dogs with a pericardectomy.
Bernard
Fabrice
F
Clinique Veterinaire, Neuilly sur Seine, France.
Kudnig
Simon T
ST
Monnet
Eric
E
D000768:Anesthesia, General / Q000662:veterinary; D000779:Anesthetics, Local / Q000008:administration & dosage / Q000494:pharmacology*; D000818:Animals; D002045:Bupivacaine / Q000008:administration & dosage / Q000494:pharmacology*; D004285:Dogs / Q000502:physiology / Q000601:surgery*; D004359:Drug Therapy, Combination; D006339:Heart Rate / Q000187:drug effects; D006439:Hemodynamics / Q000187:drug effects; D007267:Injections / Q000662:veterinary; D008012:Lidocaine / Q000008:administration & dosage / Q000494:pharmacology*; D010149:Postoperative Pain / Q000517:prevention & control / Q000662:veterinary; D010496:Pericardium; D035422:Pleural Cavity; D013906:Thoracoscopy / Q000379:methods / Q000662:veterinary
D000779:Anesthetics, Local; D008012:Lidocaine; D002045:Bupivacaine