For routine standardization, pain is charted on a scale of 0(no pain) to 10 (worst pain possible). At pain intensities of 0 to 4 patients describe the interference with function as mild (as reflected in daily activities and mood), at 5 to 6 it is described as moderate, and at 7 to 10 as severe (2). For standard scaling, different assessment tools were developed. One-dimensional pain scales, in which the patient is asked to describe the intensity of pain, are the most used tool today (1). These are the VAS- Visual analog Score (e.g., the patient places a mark on a 10-cm line to indicate the intensity of pain; one end of the line is labeled "no pain" and the other "the worst possible pain"), the Numeric ("please rate the intensity of pain on a scale of 1 to 10") and the Categorical ("please rate the pain as none, mild, moderate, or severe"). These scales are reliable and valid and can be used in conjunction with the World Health Organization (WHO) analgesic ladder guideline. (3)