Does anyone have information on the effect of transporting blood gas speciemns via intra-hospital pneumatic systems on blood gas analysis results? A reference would be helpful. Many thanks =========================================== Ahmed Waise FRCP FRCPath Cosultant Chemcial Pathologist Friarage hospital, Northallerton, North Yorks DL6 1JG Tel 01609 763030 Fax 01609 764632 EMail: [log in to unmask] ==========================================