Hey fellow PathlabTalkers,
Enamul here from Australia. We have had situations with our Ortho Vision analyzer that O positive patients with very recent transfusions with Emergency O negative units have appeared as O NEG on the Ortho cards using the Vision analyzer. However, upon repeating the group and reverse using the ortho group cards manually they appeared as O positive. Now our theory is the transfusing O neg red cells are heavier and settle at the bottom after centrifugation and the Vision analyzer probe goes at the bottom to suck up the cells. However, doing it manually the lab tech usually take cells from the top. Do you guys have any article or have you experienced something. If you have please share.