The invention relates to a high-pressure fuel pump for operating an internal combustion engine, with the pump being connected to a low-pressure and a high-pressure circuit. The tourniquet is in the form of a band formed of a thin flexible, non-stretchable material and is arranged to be wrapped around the patient’s limb, tightened and locked in place to reduce circulation. Portions of the semiconductor wafer located between the plurality of chip regions are removed to form a plurality of semiconductor chips. The base unit stores such information.