Vector selection is automatically achieved via a thoracic or intracardiac impedance signal collected in a cardiac function management device or other implantable medical device that includes a test mode and a diagnostic mode. The rear end of the blood taking vessel is sealed by a plug which may be temporarily opened for taking blood, which dispenses the taken blood by means of a stroke running in a sealed manner in the blood taking vessel, which empties under pressure at least a part amount of the blood retained before the limiting element. Data indicating protected frames are then exchanged between the station and access point to select which management frames are to be protected and a protection mechanism to be used for protecting the management frames. The absorbent article has a bottom layer, which is made of an apertured film oriented such that protuberances face the inside of the absorbent article.