Solutions were prepared from fentanyl citrateadditive free Fentanyl-Janssen, Janssen - Cilag, Belgium and levobupivacaine hydrochloride Chirocaine-Sigma Chemical, Steinheim, Germany.
Las soluciones fueron preparadas con citrato de fentanilo sin aditivo Fentanyl-Janssen, Janssen-Cilag, Bélgica y clorhidrato de bupivacaína Chirocaine-Sigma Chemical, Steinheim, Alemania.
As soluções foram preparadas com citrato de fentanil sem aditivo Fentanyl-Janssen, Janssen - Cilag, Bélgica e cloridrato de bupivacaína Chirocaine-Sigma Chemical, Steinheim, Alemanha.