The device (110) has an insertion aid (112) with a rigid base body (114) i.e. insertion needle (116), for insertion into a body tissue (124) i.e. interstitial adipose tissue. The device generates modifiable holding force e.g. electrostatic holding force, between the base body and a subcutaneous device (122) i.e. subcutaneous sensor (126). The device adjusts the force during an insertion step in such a manner that the subcutaneous device is held on the base body. The device adjusts the force after the insertion step in such a manner that the subcutaneous device is releasable from the base body.
