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Hi from down under.... We are building a new greenfield $1.7 billion 1000 bed tertiary hospital. We currently just send blood to OR in a PTS but in the new hospital all our blood products will be sent by PTS (65 stations). I have been asking questions regarding the G-forces involved on the CBBS and so far have only had answer. When I read about what can happens with a faulty PTS carrying blood samples I am concerned that we know so little about what happens at 25mph in the tubes.( Clinical Biochemistry Volume 42, Issue 12, August 2009, Pages 1265-1269) Now I read with interest a post on this site : "Our pneumatic tube system cannot be used to send 'high-protein' medications per the manufacturer and our pharmacy dept. (Apparently the high air-pressure slamming can denature the protein.)" Now I am confused, we are happy to send blood samples for complex analysis being subjected to "slamming" and often these are for antibody assays for example the blood bank antibody screen.We know the forces can be higher enough to hemolysis blood for assay if a fault occurs.. Does anybody under stand the science around not sending Rhogam in the PTS but it is OK for Red cells ,FFP and plats. I have a device I am trying to use to measure the G-forces in the cannisters and map out the time moving and time stationary as a quality control and validation system. A prototype is working but does anyone know of a commercial product that does the same thing rather than inventing the wheel again!. My aim is to do comprehensive but easy daily QA on our new hosp PTS. Looking forward to your comments T