A device for adjusting and determining the blood flow plateau at a patient's limb, wherein the device includes an chamber the wall of which surrounds an inner space, and at least one opening for inserting at least a part of the limb into the inner space as well as at least one recess, that allows access to the part of the limb that is located inside the inner space, are formed in the chamber, and wherein the device includes at least one heating element that is in thermal contact with the inner space. In this context, it is provided that the device further includes an apparatus for determining the blood flow plateau at the part of the limb that is located inside the inner space.