One hundred and twenty patients, between the ages of 45 and 85 years, scheduled to undergo total knee arthroplasty were randomly assigned into one of two groups to compare the postoperative effect of modern general anaesthetic to spinal anaesthetic. Results demonstrated that participants who received modern general anaesthetic treatment experienced significantly less pain postoperatively, less nausea and dizziness, and required less morphine following treatment than patients who received a spinal anaesthetic. Subjects who received spinal anesthesia were found to be more likely to request a different method of anesthesia for a subsequent treatment