Combining Lidocaine and Ropivacaine for an Infraclavicular Brachial Plexus Nerve Block

30 mL Ropivacaine 5 mg/mL (= 150 mg Ropivacaine)

20 mL Ropivacaine 5 mg/mL + 10 mL Lidocaine-Epinephrine (20 mg + 5 μg) / ml (= 100 mg Ropivacaine + 200 mg Lidocaine)

20 mL Ropivacaine 7,5 mg/mL + 10 mL Lidocaine-Epinephrine (20 mg + 5 μg)/mL (= 150 mg Ropivacaine + 200 mg Lidocaine)