red-out
 n.— «The scope should not be advanced against resistance. “Red-out” is the term used to describe what occurs when the tip of the scope is placed too close to the bowel wall mucosa. In this situation, the reflection of light off the vascularized tissue produces a red haze. By slightly withdrawing the scope, the endoscopist can again obtain a clear view of the bowel wall.» —“Health: Screening for Colorectal Cancer” Ghana News Oct. 9, 2008. (source: Double-Tongued Dictionary)

Tagged with →