Patients who have agreed to surgery, which involves the application of anesthesia or sedation, can have the anesthesia examination done before the surgery in the anesthesia clinic of the Polyclinic St. Catherine. After that the patient can choose what type of anesthesia should be used during the surgery. Various protocols for the treatment of patients with chronic pain are also applied in this clinic, with an emphasis on post-operative treatment of chronic pain associated with locomotor system and diseases of the spine.