Skin contact sensor

Abstract

A skin contact sensor 100 for detecting a biomarker in the interstitial fluid of a user such as a subject’s glucose or hydration levels. The sensor comprises a reusable electronics part and a disposable medical patch. The medical patch comprises a substrate 40 with a plurality of electrodes 60, conductive elements 70 (like tracks) and a contact interface 80. The substrate 40 may have a support member (90, figure 4c) and the contact interface 80 may be non-integral to the substrate 40. The reusable electronics are electrically connected to the medical patch via the contact interface 80 by an electrical connector (30, figure 4c) and removably secured to the medical patch by an adhesive such as double-sided tape. Electrical contact between the electrodes 60 and patient’s skin is provided by a conductive gel which also serves as a medium into which interstitial fluid is extracted during use and can also contain enzymes to aid in target detection. [Figure 1a.]