Effect of Pre-injection of Lidocaine on Myoclonus Induced by Induction With Etomidate in Elderly Patients During General Anesthesia

Effect of Pre-injection of Lidocaine on Myoclonus Induced by Induction With Etomidate in Elderly Patients During General Anesthesia

To evaluate the effect of pre-injection of lidocaine on myoclonus induced by induction with etomidate during general anesthesia in elderly patients

Inclusion Criteria:

• 1. Aged between 60 and 81 years 2. Body mass index: 20 to 30 kg/m2 3. American Society of Anesthesiology (ASA) Physical Status: Ⅰ or Ⅱ 4. Signed informed consent form

Exclusion Criteria:

• 1. Use of sedatives or opioids 2. History of central nervous system diseases, like epilepsy, shaking palsy, or chorea, etc 3. Hyperthyroidism 4. Serious diabetes 5. Hyperkalemia 6. Cardiac surgery 7. Serious ventricular disease or atrioventricular block 8. Liver or renal dysfunction 9. Allergies to amide local anesthetics or fat emulsion