RESUMO
PURPOSE: To evaluate the change in ocular motility and muscle thickness measured with ultrasonography after intramuscular injection of bupivacaine and botulinum toxin A. METHODS: Eight patients (five female) were enrolled to measure ocular motility prior and 1, 7, 30 and 180 days after one injection of 2 ml of 1.5% bupivacaine and 2.5 U of botulinum toxin A in agonist and antagonist muscles, respectively, of eight amblyopic eyes. Muscle thickness was measured prior and on days 1, 7 and 30 after injection using 10-MHz ultrasonography (eyelid technique). RESULTS: Mean change in alignment was 10 prism diopters after 180 days (n=6). An average increase of 1.01 mm in muscle thickness was observed after 30 days of bupivacaine injection and 0.28 mm increase was observed after botulinum toxin A injection, as measured by ultrasonography. Lateral rectus muscles injected with bupivacaine had a mean increase of 1.5 mm in muscle thickness. CONCLUSION: In this study, a change in ocular motility was observed after 180 days of intramuscular injection of bupivacaine and botulinum toxin in horizontal extraocular muscles. Overall, there was an increase of muscle thickness in both botulinum toxin A and bupivacaine injected muscles after 30 days of injection when measured by ultrasonography. This change was more pronounced on lateral rectus muscles after bupivacaine injection.
Assuntos
Anestésicos Locais/administração & dosagem , Toxinas Botulínicas Tipo A/administração & dosagem , Bupivacaína/administração & dosagem , Movimentos Oculares/efeitos dos fármacos , Fármacos Neuromusculares/administração & dosagem , Músculos Oculomotores/efeitos dos fármacos , Estrabismo/tratamento farmacológico , Adolescente , Adulto , Feminino , Humanos , Injeções Intramusculares , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Resultado do Tratamento , Adulto JovemRESUMO
PURPOSE: To evaluate the change in ocular motility and muscle thickness measured with ultrasonography after intramuscular injection of bupivacaine and botulinum toxin A. METHODS: Eight patients (five female) were enrolled to measure ocular motility prior and 1, 7, 30 and 180 days after one injection of 2 ml of 1.5% bupivacaine and 2.5 U of botulinum toxin A in agonist and antagonist muscles, respectively, of eight amblyopic eyes. Muscle thickness was measured prior and on days 1, 7 and 30 after injection using 10-MHz ultrasonography (eyelid technique). RESULTS: Mean change in alignment was 10 prism diopters after 180 days (n=6). An average increase of 1.01 mm in muscle thickness was observed after 30 days of bupivacaine injection and 0.28 mm increase was observed after botulinum toxin A injection, as measured by ultrasonography. Lateral rectus muscles injected with bupivacaine had a mean increase of 1.5 mm in muscle thickness. CONCLUSION: In this study, a change in ocular motility was observed after 180 days of intramuscular injection of bupivacaine and botulinum toxin in horizontal extraocular muscles. Overall, there was an increase of muscle thickness in both botulinum toxinum A and bupivacaine injected muscles after 30 days of injection when measured by ultrasonography. This change was more pronounced on lateral rectus muscles after bupivacaine injection.
OBJETIVO: Avaliar a mudança na motilidade ocular e espessura dos músculos medida por ultrassonografia após injeção intramuscular de bupivacaína e toxina botulínica tipo A. MÉTODOS: Oito pacientes (5 mulheres) foram incluidos para avaliar a mudança na motilidade ocular antes e após 1, 7, 30 e 180 dias da injeção de 2 ml de bupivacaína 1,5% e 2,5 U de toxina botulínica tipo A nos músculos agonista e antagonista, respectivamente, de 8 olhos amblíopes. A espessura muscular foi medida antes após 1, 7, 30 dias da injeção através de ultrassonografia ocular 10-MHz (técnica palpebral). RESULTADOS: A média de mudança no alinhamento ocular foi igual a 10 dioptrias prismáticas após 180 dias (n=6). Foi observado um aumento médio de 1,01 mm na espessura muscular após 30 dias da injeção de bupivacaína e 0,28 mm após a injeção de toxina botulínica A medido pela ultrassonografia. Os músculos reto laterais injetados com bupivacaína tiveram um aumento médio de 1,5 mm na sua espessura. CONCLUSÃO: Neste estudo, observou-se uma mudança no alinhamento ocular após 180 dias de injeção intramuscular de bupivacaína e toxina botulínica A. Em geral, houve um aumento da espessura muscular de ambos os grupos de músculos injetados com toxina botulínica A e com bupivacaína após 30 dias da injeção. Essa mudança foi mais pronunciada nos músculos retos laterais após a injeção de bupivacaína.
