Effect of Esmolol on Pain Due to Rocuronium

The Effect of Esmolol on Pain Due to Rocuronium Injection Pain

90 American society of anesthesiology (ASA) physical status I and II patients undergoing general anesthesia for elective surgery will be included in the study. Patients will be randomized into three groups. Group E will receive esmolol (1 mg/kg), Group IL lidocaine (0.5 mg/kg)and Group C placebo(NaCl 0.9%, 5 mL), followed by a 0.05 mg/kg rocuronium. After intravenous induction with propofol, adequate muscle relaxation for intubation will be received by 0.5 mg/kg rocuronium.

Patients will be observed after injection of rocuronium 0.05mg/kg, then immediately asked if they have pain in the arm. The response are assessed; discomfort, pain, and withdrawal of the hand are recorded and graded using a 4-point scale (none, mild, moderate, or severe). After the intubating dose of rocuronium, withdrawal reactions are scored as follows: (a) no pain response, (b)pain limited to the wrist, (c) pain limited to the elbow/shoulder, or (d) generalized pain response.

Inclusion Criteria:

• ASA physical status I and II patients
• Undergoing general anesthesia for elective surgery

Exclusion Criteria:

• Known allergy to esmolol or lidocaine
• Chronic pain
• Pregnancy
• Withdrawal of consent by the patient