A system for piercing dermal tissue includes a skin-piercing element (e.g., an integrated micro-needle and biosensor medical device), at least one electrical contact (e.g., an electrical skin contact) and a meter configured for measuring an electrical characteristic (e.g., resistance and/or impedance)...http://www.google.ca/patents/US20060178573?utm_source=gb-gplus-sharePatent US20060178573 - System and method for piercing dermal tissue
