- They must be non-smokers because smokers carry increased rates of complication and both surgeons have a policy to solely operate on non-smokers (minimum smoke-free period of one month leading to surgery). Pain ratings captured in the VAS and QoR9 are important for judging quality of postoperative recovery. Pre-existing pain or an inability to take narcotics would compromise the reliability of these measures. Therefore, patients must not suffer from chronic pain. They must not be taking narcotic (morphine-like) medication for pain on a regular basis. They must not have an allergy to local anesthetics or morphine-like medications.