Patient had sample collected and crossmatched 4 units of pack cells on day 1. No transfusion on day 2. Patient started transfusion of first unit of packed cells only on day 3 Patient was transfused 2nd unit of packed cell on day 4. My question are: Can patient still be transfused with the remaining 2 units of packed cells after day 4 ? Or do we need to get a new sample from the patient and re-do the antibody screen and re-crossmatch the 2 remaining units packed cells assigned for her.