When dealing with the hospitals regarding if a "reference call in" (we are a blood center) is an emergency at 2 AM, I've found that most of the hosp. in this area let each Dr. push them into tx. when they (Dr.) feel like it. I've seen pt. tx. 2 units at 9.9 and 30 because the rest home will not keep them there with a low crit. Hard numbers are hard to stick with because each situation is so different. I worked with an elderly tech. during her chemotharapy that would work with a crit. of 18-20. Chronic anemia vs acute anemia? In a level one trauma center there are almost too many situations to have a "set tx. point" After all that blather,,,, we push for 7 and 21 in non-emergency/surgery situations. Again let me state that I personally do not think there is an all inclusive set point that will fit all of your transfusion needs.