Abstract
It is known that ropivacaine produces a differential block for sensory and motor nerves. It has a greater effect on sensory than motor nerves. It also has lower cardio-toxic and central nerve toxic potential than bupivacaine. The safety margin before the onset of toxic side effects is higher than any other local anesthetic. Because of these advantages, using ropivacaine, we can perform a treatment with both lower motor blockade and higher sensory blockade. Ropivacaine is an agent which has been improving treatment of pain in many ways.
