Our hospital is wanting our blood bank to switch to plastic 12 x 75 tubes for our serologic testing. Our blood bank supervisor does not want us to. We know the AABB technical manual states the fluid has to cut across the cell button and that reaction has to be observed. The plastic tubes we have are cloudy in appearance, and we know they can't be used. What we are looking for is how do we prove to the hospital committee we can NOT use those plastic tubes? Where in the technical manual/standards/any other source can we show them this is not possible? Also, what could be an alternative to the glass? Thank you all for your help!