A body fluid sampling system is provided for use on a tissue site. In one embodiment, the system comprises a cartridge; a penetrating member driver; a plurality of penetrating members arranged in a radial configuration on the cartridge wherein sharpened distal tips of the penetrating members point radially...http://www.google.com.au/patents/US7892185?utm_source=gb-gplus-sharePatent US7892185 - Method and apparatus for body fluid sampling and analyte sensing
