REVISTA

Reducción de las necesidades de anestésicos inhalatorios por lidocaína en conejos.

Descripción: Una infusión continua de lidocaína reduce las necesidades de isoflurano en un 10-22% sin efectos adversos en conejos.

TITULO FUENTE ORIGINAL:

Effects of lidocaine administration via continuous rate infusion on the minimum alveolar concentration of isoflurane in New Zealand White rabbits (Oryctolagus cuniculus).

AUTORES:

Schnellbacher RW, Carpenter JW, Mason DE, Kukanich B, Beaufrère H, Boysen C.

REVISTA ABREV.:

Am J Vet Res.

AÑO:

2013

REFERENCIA:

Nov;74(11):1377-84.

DOI:

10.2460/ajvr.74.11.1377.

FECHA DE PUBLICACIÓN:

01/11/2013

RESUMEN ORIGINAL:

Objective-To evaluate the effect of a continuous rate infusion (CRI) of lidocaine on the minimum alveolar concentration (MAC) of isoflurane in rabbits. Animals-Five 12-month-old female New Zealand White rabbits (Oryctolagus cuniculus). Procedures-Rabbits were anesthetized with isoflurane. Baseline isoflurane MAC was determined... + Leer más

Objective-To evaluate the effect of a continuous rate infusion (CRI) of lidocaine on the minimum alveolar concentration (MAC) of isoflurane in rabbits.

Animals-Five 12-month-old female New Zealand White rabbits (Oryctolagus cuniculus).

Procedures-Rabbits were anesthetized with isoflurane. Baseline isoflurane MAC was determined by use of the tail clamp technique. A loading dose of lidocaine (2.0 mg/kg, IV) was administered followed by a CRI of lidocaine at 50 μg/kg/min. After 30 minutes, isoflurane MAC was determined. Another loading dose was administered, and the lidocaine CRI then was increased to 100 μg/kg/min. After 30 minutes, isoflurane MAC was determined again. Plasma samples were obtained for lidocaine analysis after each MAC determination.

Results-Baseline isoflurane MAC was 2.09%, which was similar to previously reported values in this species. Lidocaine CRI at 50 and 100 μg/kg/min induced significant reductions in MAC. The 50 μg/kg/min CRI resulted in a mean plasma lidocaine concentration of 0.654 μg/mL and reduction of MAC by 10.5%. The 100 μg/kg/min CRI of lidocaine resulted in a mean plasma concentration of 1.578 μg/mL and reduction of MAC by 21.7%. Lidocaine also induced significant decreases in arterial blood pressure and heart rate. All cardiopulmonary variables were within reference ranges for rabbits anesthetized with inhalation anesthetics. No adverse effects were detected; all rabbits had an uncomplicated recovery from anesthesia.

Conclusions and Clinical Relevance-Lidocaine administered as a CRI at 50 and 100 μg/kg/min decreased isoflurane MAC in rabbits. The IV administration of lidocaine may be a useful adjunct in anesthesia of rabbits.

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