Brazilian Journal of Anesthesiology
Brazilian Journal of Anesthesiology
Scientific Article

The effect of intra-articular levobupivacaine on shoulder cartilage at different doses - experimental study

O efeito de levobupivacaína intra-articular na cartilagem do ombro em doses diferentes-estudo experimental

Mustafa Soner Özcan; Mahmut Kalem; Menekş; e Özçelik; Ercan Ş; ahin; Sanem Çakar; Nazlı; Hayı; rlı; ; Oya Evirgen; Feyhan Ökten

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Abstract Background and objectives: In this study it was aimed to examine the histological and morphometric effects on cartilage structure of intra-articular application of levobupivacaine to the shoulder joint. Methods: In twenty New Zealand adult male rabbits, 35 shoulders were used for the study and prepared in 5 groups of 7. These groups were defined as Groups L1, L2, L3 and L4 which were right shoulders administered with 0.25% and 0.5% levobupivacaine, Group C which were left shoulders as the control group and Groups S1 and S2 which were left shoulders administered with 0.9% saline. On the 2nd and 15th days the animals were killed, the glenohumeral joints were evaluated macroscopically then cartilage samples were taken. These samples were evaluated with Mankin score, and histomorphometrically by measuring the thickness of the cartilage between the superficial cartilage layer and the tidemark and the thickness of calcified cartilage between the tidemark and the subchondral bone. Results: Macroscopically, on the 15th day the joint fluid was seen to have reduced in all the groups. After microscopic evaluation, the highest Mankin score (mean: 3.14 ± 2.1/14) was in the L4 group (15th day 0.5% levobupivacaine) and was found to be statistically significant (p < 0.05). No statistically significant difference was determined between the other groups. Conclusions: Histologically, as the highest Mankin score was in the L4 group, this indicates that in a single intra-articular injection of levobupivacaine a low concentration should be selected. Level of evidence: Level 5, animal study.


Glenohumeral joint, Chondrolysis, Levobupivacaine


Resumo Justificativa e objetivo: Neste estudo o objetivo foi examinar os efeitos histológicos e morfométricos sobre a estrutura da cartilagem da aplicação intra-articular de levobupivacaína em articulação do ombro. Métodos: Trinta e cinco ombros de 20 coelhos New Zealand, machos e adultos, foram usados para o estudo e divididos em cinco grupos de sete. Os grupos foram definidos como L1, L2, L3 e L4, consistiram em ombros direitos nos quais levobupivacaína a 0,25% e 0,5% foi administrada; o Grupo C, que consistiu em ombros esquerdos, foi o grupo controle; os grupos S1 e S2, que consistiram em ombros esquerdos, receberam solução salina a 0,9%. Os animais foram sacrificados no segundo e no 15º dia; as articulações glenoumerais foram avaliadas macroscopicamente e, em seguida, amostras de cartilagem foram coletadas. As amostras foram avaliadas com o escore de Mankin e histomorfometricamente. Mediu-se a espessura da cartilagem entre a camada superficial e a "linha de maré" (tidemark) e a espessura da cartilagem calcificada entre a tidemark e o osso subcondral. Resultados: Macroscopicamente, observou-se no 15º dia que o líquido articular havia reduzido em todos os grupos. Após a avaliação microscópica, o maior escore de Mankin (média: 3,14 ± 2,1/14) foi observado no grupo L4 (15º dia levobupivacaína a 0,5%), considerado estatisticamente significativo (p < 0,05). Nenhuma diferença estatisticamente significativa foi determinada entre os outros grupos. Conclusões: Histologicamente, como o maior escore de Mankin foi observado no Grupo L4, isso indica que em uma única injeção intra-articular de levobupivacaína uma concentração baixa deve ser selecionada. Nível de evidência: Nível 5, estudo em animais.


Articulação glenoumeral, Condrólise, Levobupivacaína


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