If an AB negative patient is typed, but there are no AB-negative units available, what should be done?

When an AB negative patient is typed and there are no AB-negative units available, the most appropriate action is to check the inventory of A-, B-, and O-negative units. This is because AB individuals can safely receive blood from A, B, and O types, as well as from Rh-negative blood.

Using A-, B-, or O-negative blood provides flexibility in transfusion options while ensuring compatibility for the patient. Prioritizing the inventory of these types maximizes the chances of providing a safe and effective transfusion, as AB patients can tolerate these other Rh-negative groups.

Ordering AB-negative units from a supplier may not be timely or feasible depending on the urgency of the patient's need, and preoperative autologous donation may not always be possible, especially if the patient is already in need of immediate transfusion. Doing nothing is not a viable option, as it does not address the patient’s immediate need for blood. Therefore, checking the available inventory of compatible units is the best course of action.