The present invention concerns a novel human cytokine. This allows for actuation over a greater distance than a physician might be able to perform in a single motion while preserving a direct correspondence between the movements of the ratcheting handle and the actuation of the intraluminal device. The identifying-personalizing ring, at its surface adjacent to the diaphragm portion, is provided with at least one locating element for explicit locating the identifying-personalizing ring in defined angular position in relation to an axis of said inlet pipe of said body. Two measurements are performed at azimuthal angles separated by 180\xb0, and a difference of these measurements is calculated.