Abdulmalik Alnuqydan: Why Do We Transfuse RBCs Less Than 7 Days Old to Newborns?
Abdulmalik Alnuqydan, Laboratory Specialist at Rafa Medical Complex, shared a post on LinkedIn:
“Blood Bank Insights – Why are newborns often transfused with Packed RBCs that are less than 7 days old?
One of the key considerations in neonatal transfusion medicine is the age of stored red blood cells.
As Packed RBCs are stored, they undergo storage lesions – a series of biochemical and structural changes.
One important change is the gradual leakage of potassium (K⁺) from red blood cells into the storage solution due to membrane changes over time.
When older blood is transfused, especially in newborns who have a very small circulating blood volume and immature kidneys, the potassium load may increase the risk of hyperkalemia.
Severe hyperkalemia can lead to:
- Cardiac arrhythmias
- Tachycardia or other rhythm disturbances
- In rare but severe cases, cardiac arrest
For this reason, many neonatal transfusion protocols prefer fresh Packed RBCs (typically less than 7 days old) for situations such as exchange transfusions or large-volume transfusions, helping reduce the risk of potassium-related complications.
Key Takeaway:
Using fresher blood products is one of several strategies that can improve transfusion safety for our smallest patients.
Have you encountered neonatal transfusion protocols that specify the maximum storage age of RBC units? Share your experience in the comments.”
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