For operations on the kidney the majority of operators prefer to place the patient in a lateral position with the thighs flexed on the abdomen. Unless the thighs are thus held by an assistant they are soon extended, permitting the patient to fall forward or backward and greatly interfering with exposure of the kidney. This change in position during the operation occurs even when the iliocostal space of the side opposite to that which is to be operated on, is raised by some form of support such as is now generally employed (See E in illustration).
About one year ago I devised an apparatus to keep both thighs flexed by supporting the upper thigh on a wide, well-padded metal band (A). It can be readily adjusted to any one of the most generally used operating tables. The apparatus is so constructed that it can be applied to either side of