Cardiopulmonary and analgesic effects of caudal epidurally administered ropivacaine in cattle.
Vet Anaesth Analg
; 39(4): 409-13, 2012 Jul.
Article
en En
| MEDLINE
| ID: mdl-22574815
ABSTRACT
OBJECTIVE:
To assess cardiopulmonary and analgesic effects after administration of ropivacaine into the caudal epidural space of cattle. STUDYDESIGN:
Prospective, single-dose trial. ANIMALS Eight healthy mixed breed cows aged 8 ± 5 years and weighing 507 ± 112 kg.METHODS:
Caudal epidural anesthesia was produced in cows with 0.75% ropivacaine (0.11 mg kg(-1)). Onset time, duration and cranial spread of analgesia were recorded. Heart rate (HR), respiratory rate (f(R)), rectal temperature (RT), and mean arterial blood pressure (MAP) were measured prior to epidural administration (T(0) ) and at 15, 30, 60, 120, 180 and 240 minutes after epidural administration (T(15), T(30), T(60) , T(120) , T(180) and T(240) ). Arterial blood acid-base balance (pH, standard bicarbonate and base excess), gas tension (PaO(2), PaCO(2), SaO(2)) and electrolytes (Na(+), K(+), iCa(2+),Cl(-)) were recorded at T(0), T(30), T(60), T(120), T(180) and T(240). Ataxia was evaluated at T(0), T(30), T(60), T(120), T(180) and T(240) and at 1 hour intervals thereafter until analgesia was no longer present in each animal.RESULTS:
Epidurally administered ropivacaine induced variable analgesia extending bilaterally from the coccyx to S3. Time to onset of analgesia and mean duration in the perineal area were 15 ± 4 and 359 ± 90 minutes, respectively. Respiratory rate and RT increased from T(120) to T(240) when compared to the value at T(0) . Ionized calcium and chloride concentrations increased at T(180) and T(240) when compared to T(0). The other variables were not significantly different from baseline values (p > 0.05). Four animals were mildly ataxic. CONCLUSION AND CLINICAL RELEVANCE Ropivacaine (0.75%, 0.11 mg kg(-1)) can be administered by caudal epidural injection to produce prolonged bilateral perineal analgesia with minimal ataxia and cardiopulmonary changes in standing cattle.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Bovinos
/
Amidas
/
Corazón
/
Anestesia Caudal
/
Anestésicos Locales
/
Pulmón
Límite:
Animals
Idioma:
En
Revista:
Vet Anaesth Analg
Asunto de la revista:
ANESTESIOLOGIA
/
MEDICINA VETERINARIA
Año:
2012
Tipo del documento:
Article
País de afiliación:
Brasil