The invention relates to an assembly for fixing a tube for medical purposes to a patient’s mouth, the tube being fixed to the patient’s head. An elastic panel of the boot blocks the slit at least partially, the elastic panel being stretched between the lateral quarter and the medial quarter. In accordance with a preferred embodiment, an autonomous independent agent process running at a point of use, such a background process in a client operating system kernel, interrupts requests for access to resources. The initial increase is defined substantially independently from the recursively determined estimated value. The shielding portion is extended from the first leadframe being bent to cover the optical emitter and exposes the optical emitter by an opening formed thereon.