The purpose of this study is to find out whether patients receiving spinal anesthesia containing lidocaine and sufentanil get transient neurological symptoms.

Inclusion Criteria:

• adults over the age of seventeen years

Exclusion Criteria:

• patient refuse spinal anesthesia
• spinal anesthesia is contraindicated
• pregnancy
• patient is incapable of giving consent
• diabetes
• neurological disorders
• chronic pain
• chronic use of analgesics
• spinal anesthesia within five days before the actual surgery

Patients who are submitted for surgery at a local hospital and where spinal anesthesia is indicated.