Ocwoodmanp,
When my son was first diagnosed 10 years ago they did not do a genotype test on him (a test that needs to be done once, it is a test that looks at the dna of the patient to determine what antigens he/she will react to and which ones the patience has so that they do not need to be avoided in the donor pool). Genotype testing is the most sophisticated testing that can be done in order to ensure that a very close match is found for transfusion and antigens that are likely to cause trouble are avoided.
What you describe is a crossmatch which is done before each transfusion - in this procedure the patient's blood is testing to see what it is reacts with and then an appropriate donor is found. Having genotype matching makes this procedure accurate.
Reactin causes less drowsiness and moodiness than Benadryl. Benadyl acts quicker in case of a severe reaction. For long term use I would suggest the use of Reactin, which you can begin giving a few days before transfusion and continue for a few days after. You should consult with your child's doctor before giving any of these. Hopefully over time your daughter will react less to transfusions. But since your daughter has a tendency to react I suggest that you should have the genotype testing done soon. You can speak to your doctor who can have the blood bank send the sample to a lab where they can do the test and have the results back to your blood bank within a few weeks.
The blood panel is a blood test with a complete blood count and is not the same as a genotype test. It simply measures RBC, WBC, platelets etc (if I am correct, Andy?).
Sharmin