Abstract: The invention relates to a device for the introduction of medical items into the human or animal body. The device comprises a longitudinal guide sleeve or member having a first end segment, a second end segment, a longitudinal axis, and an outer surface. The second end segment defines a chamber and includes a drive element, which may be configured to couple to another drive device for rotatably driving the longitudinal member. The first end segment includes a screw thread for anchoring the device to bone such as a pedicle in the spine. The thread defines either a cylindrical or prismatic thread root or thread surface. The first end includes self-cutting teeth and at least one slot that extends along the outer surface between the self-cutting teeth and the second end segment in communication with the chamber.