Four units of platelets were pooled at 2:00 pm; at 7:00 pm the ward asked if they could still be used, but they were outdated at 6:00 pm. What is the correct status of the pool?

Four units of platelets were pooled at 2:00 pm; at 7:00 pm the ward asked if they could still be used, but they were outdated at 6:00 pm. What is the correct status of the pool?

• A. Yes, they are still usable
• B. No, they are outdated at 6 pm
• C. Yes, if re-tested
• D. No, they must be discarded regardless of time

Answer: (B)

Pooling platelets creates a single transfusion product that must be used within a very short time frame. Once individual units are combined, the pool has a limited window—about 4 hours at room temperature with agitation—to be transfused because the risk of bacterial growth increases with time. In this case, four platelet units were pooled at 2:00 pm. The 4-hour window ends at 6:00 pm. By 7:00 pm the pool has passed its allowed usage time, so it is considered outdated and cannot be used. Re-testing or extending the storage time isn’t permitted under standard practice, so the correct status is that the pool is outdated at 6:00 pm.

Pooling platelets creates a single transfusion product that must be used within a very short time frame. Once individual units are combined, the pool has a limited window—about 4 hours at room temperature with agitation—to be transfused because the risk of bacterial growth increases with time.

In this case, four platelet units were pooled at 2:00 pm. The 4-hour window ends at 6:00 pm. By 7:00 pm the pool has passed its allowed usage time, so it is considered outdated and cannot be used. Re-testing or extending the storage time isn’t permitted under standard practice, so the correct status is that the pool is outdated at 6:00 pm.