Comparison of lidocaine and lidocaine-epinephrine for the paravertebral brachial plexus block in dogs.
Vet Anaesth Analg
; 44(2): 317-328, 2017 Mar.
Article
en En
| MEDLINE
| ID: mdl-28461127
ABSTRACT
OBJECTIVE:
To compare the motor and sensory block efficacy and duration of a modified paravertebral brachial plexus block (PBPB) after administration of lidocaine alone (LI) or combined with epinephrine (LE). STUDYDESIGN:
Prospective, randomized, blinded, crossover study. ANIMALS A total of eight healthy female Beagle dogs.METHODS:
Under general anesthesia, modified PBPB was performed on the left thoracic limb using neurostimulation and/or ultrasound guidance to administer lidocaine (2 mg kg-1; 0.2 mL kg-1) either alone (treatment LI, n = 10) or with epinephrine (1100,000; treatment LE, n = 9). Sensory block was evaluated through reaction to a painful mechanical stimulus applied at five sites on the limb. Motor block effect was evaluated according to visual gait assessments and thoracic limb vertical force measurements under dynamic and static conditions. Data were analyzed using repeated-measures generalized estimating equations. All statistical tests were performed two-sided at the α = 0.05 significance threshold.RESULTS:
The duration of sensory block did not differ significantly between treatments. Visible gait impairment was more persistent in LE than in LI (118 ± 63 minutes for LI and 163 ± 23 minutes for LE; mean ± standard deviation) (p = 0.027). At nadir value, dynamic peak vertical force was lower in LE than in LI (p = 0.007). For both dynamic and static evaluations, the nadir and the return to baseline force were delayed in LE (return to normal at 180-200 minutes) when compared with LI (130-140 minutes) (p < 0.005). CONCLUSIONS AND CLINICAL RELEVANCE The addition of epinephrine to lidocaine prolonged the duration and increased the intensity of the regional block, as verified by visual gait assessment and kinetic analysis. No significant difference was noted between treatments regarding sensory blockade. Kinetic analysis could be useful to evaluate regional anesthetic effect in dogs.Palabras clave
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Plexo Braquial
/
Epinefrina
/
Anestésicos Combinados
/
Bloqueo del Plexo Braquial
/
Anestésicos Locales
/
Lidocaína
Tipo de estudio:
Guideline
/
Observational_studies
Límite:
Animals
Idioma:
En
Año:
2017
Tipo del documento:
Article