abstract:In the blood supply of the kidney, the vasa recta renis (or straight arteries of kidney, or straight arterioles of kidney) form a series of straight capillaries (recta is from the Latin for "straight") in the medulla. They lie parallel to the loop of Henle.
Whencontrast-enhancedCT depicts hypervascularity of the mesentery withvasculardilatation, tortuosity, andwide spacing of the vasa recta , the combsign is produced.