paddleking

Also this test should only be performed on Rh negative moms. And do not use any other Anti-D reagent, use only the one included in the kit.  
 
Anyways, I attached the AABB procedure to this test. I hope this helps a little. Good luck. 
AABB_FBS.docx

Does your sister hospital uses the same Lot numbers of Immucor FBS kit? If yes, then you guys must be doing something wrong.  When was the last time your cell washer/centrifuge was calibrated? RPMs? Amount of saline dispensed? 
If they are not using the same Lot #'s, perhaps give them one of your kits and see if they get the same result. If the kit's QC passes for them, then there is something wrong with either your procedure or maybe equipment.  This is really strange. Good luck. 
 
 

AMcCord-  
Thank you so much for your response.  That helps a lot!