1.1 This practice provides a protocol for the assessment of hemolytic properties of materials used in the fabrication of medical devices that will contact blood.1.2 This practice is intended to evaluate the acute in vitro hemolytic properties of materials intended for use in contact with blood.1.3 This practice consists of a protocol for a hemolysis test under static conditions with either an extract of the material or direct contact of the material with blood.1.4