Reduction of Rocuronium-induced Injection Pain With Aspiration of Blood

rocuronium will be pre-diluted with 2mL of normal saline. Researchers will inject the mixture into intravenous catheter.

rocuronium will be pre-diluted with 2mL of 2%lidocaine. Researchers will inject the mixture into intravenous catheter.

Researchers will connect a syringe which contains 0.8mg/kg of rocuronium intravenous catheter, and then withdraw blood into the syringe. Finally inject the mixture into intravenous catheter.