Detachable portable infusion device

A portable therapeutic apparatus securable to the body of a patient comprising:

• a cradle unit attachable to the body of the patient;
• a patch unit configured for removable connection to the cradle unit, the patch unit including at least one housing, a processor and at least one of a fluid delivery pump and an analyte level monitor for sensing a analyte level in the body;
• and
• a position detector comprising a patch portion and a cradle portion, the patch portion coupled to the patch unit, the cradle portion coupled to or comprising the material of the cradle unit;
• wherein:
• the patch portion of the position detector comprises an electro-mechanical switch and the cradle portion of the position detector comprises an associated switch activation area including a protrusion protruding from a surface of the cradle unit to activate the switch upon connection of the patch unit to the cradle unit,
• the at least on housing of the patch unit includes at least one resilient portion located proximate the switch to enable pressing of the resilient portion against the switch by the protrusion upon connection of the patch unit to the cradle unit,
• the processor is configured for receiving a position indication signal from the position detector, the position indication signal corresponding to a physical proximity of the patch portion to the cradle portion, and
• the portable therapeutic apparatus is configured for at least one therapeutic function selected from the group consisting of delivering a therapeutic fluid into the body of the patient and sensing a bodily analyte.