A threading tap for cutting threads in blind holes includes an elongated body with a central axis, the body having at a rear end a connector portion, and having at a front end a threading portion. The information recording medium comprises a main information area for recording or reproducing information and a recording area for environmental load information, which is recorded with an environmental load information of the information recording medium. The magnitude of the pressure increase may be a function of the difference between the interim breathing rate target and the patient’s breathing rate. A single elongated locking latch is provided on one of the sections, opposite the side where the hinge latch is provided, adapted to lock into a groove on the underside of the other of the sections opposite the side where the other hinge latch is provided.