Microelectromechanical oscillatory devices are placed adjacent a face of a microelectronic sensor platform and configured to oscillate to improve transport to the sensor of substances to be detected. The high gain provides a good power-supply rejection ratio, and improves the circuit performance. The base has a surface that receives the component, a channel formed in the surface of the base and a passageway formed in the base and receiving fluid therethrough. The treatment method of the present invention includes the administration of 14 doses of 2-CdA in the amount of 0. The mounting piece has such a form as to be inserted into the mounting hole, and is provided with a magnet.