An apparatus useful in analyzing samples, such as body fluids, is presented. The device is especially useful in analyzing whole blood because its configuration, with a differential vertical dimension permits rapid flow and uniform draw through the device, with contact of the relevant portion of the sample...http://www.google.de/patents/US5082626?utm_source=gb-gplus-sharePatent US5082626 - Wedge shaped test strip system useful in analyzing test samples, such as whole blood
