In one embodiment of the present invention a lancet is provided that has a sharpened distal tip, a shaft portion and a proximal drive head. The proximal drive head has a transverse dimension that is substantially larger than a transverse dimension of the shaft portion adjacent to the proximal drive head....http://www.google.com.au/patents/US20060178687?utm_source=gb-gplus-sharePatent US20060178687 - Tissue penetration device
