DEVICE FOR MONITORING TRANSDERMAL DELIVERY OF A DRUG

摘要

The invention relates to a device (102) for transdermally delivering a solvent of a drug (104) in a fluid to a mammal via an ejection mechanism. The device (102) monitors whether or not the solvent of the drug (104) has actually penetrated the mammal's skin. For that purpose, the device (102) comprises electrodes (126, 128) installable in a vicinity of a penetration region (124) of the solvent of the drug in the mammal and a sensor arrangement (132) for applying a frequency dependent voltage across the electrodes and for generating a measurement signal (136) indicative of a capacitance between the electrodes. The device furthermore comprises a comparator arrangement (140) for generating a penetration signal (146) indicative of a penetration of the solvent of the drug in fluid based on comparing the measurement signal with a nominal level (138).