Invasives GI Practice Exam

Normal serum lipase range is defined by the upper limit of normal in standard lab tests. In most reference ranges, the upper limit is about 160 U/L, so values within 0 to 160 U/L are considered normal. Lipase is a pancreatic enzyme, and while elevations point toward pancreatic inflammation (pancreatitis), this question focuses on what range is considered normal, not on diagnostic thresholds. Variations exist between labs, but 0-160 U/L is a common standard. The other ranges either cut off too early, start at a value that would exclude many normal results, or would miss normal values entirely, making them inappropriate as the normal reference range.