Huw Griffiths wrote: If anyone is currently using a single number > successfully I would appreciate some advice in order to overcome > some of the Haematological objections we are getting The IBMS recently pulished a report of a court case in which a comment about a haemolysed sample - advising that the results should be interpreted with caution - was held to apply to a blood gas sample which had the same labnumber. Is seems as if the law requires different numbers for different sample types. Mike Collins Mike Collins MLSO3 Clinical Biochemistry & Immunology The General Infirmary at Leeds, Old Medical School, Thoresby Place Leeds LS1 3EX, UK [log in to unmask] 44 (0) 113 392 2915 The opinions expressed here are my own. My colleagues and employers may not agree with them. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%