The system (1) has an appliance housing (9) containing a piercing drive (7) for accelerating a lancet (3) for a piercing movement. A housing opening (8) of the housing is provided for feeding a body part, in which the lancet is pierced with the piercing movement. An actuating device (11) is provided for driving a conveyor device (6), and a detachable block blocks transportation of a carrier strip (2) when the lancet reaches a position of use. The block is detachable by the actuation of the actuating device.
