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Kalyan Roy: Effect of Irradiation on Red Blood Cells
Kalyan Roy/ LinkedIn
Apr 25, 2026, 10:40

Kalyan Roy: Effect of Irradiation on Red Blood Cells

Kalyan Roy, Transfusion Medicine Specialist at Square Hospitals LTD, shared a post on LinkedIn:

“Effect of Irradiation on Red Blood Cells (RBCs)

Why do we irradiate blood?

Blood irradiation is primarily performed to prevent transfusion-associated graft-versus-host disease – a rare but often fatal transfusion complication.

However, this life-saving step comes with measurable effects on RBC quality during storage.

Key Scientific Insights

Storage Lesions After Irradiation

Irradiation accelerates biochemical and structural changes in RBCs:

Increases

  • Hemolysis (RBC breakdown)
  • Plasma potassium (K⁺)
  • Lactate dehydrogenase (LDH)

Decreases

  • Sodium (Na⁺)
  • 2,3-DPG impacts oxygen delivery

Hemolysis Pattern

  • Gradual and progressive rise during storage
  • Higher in irradiated units vs non-irradiated
  • Most evident with prolonged storage (≈ Day 28)

Key Point: Hemolysis is not immediate –  it develops over time

Potassium Leakage

  • Begins within 24 hours post-irradiation
  • Peaks between Day 7–28

Clinical Concern:

Risk of hyperkalemia, especially in:

  • Neonates
  • Massive transfusion cases
  • Renal impairment

Impact of Storage Duration

Longer storage after irradiation leads to greater RBC damage

Progressive decline in quality:

  • Increased hemolysis
  • Increased biochemical alterations

Late storage: highest risk period

Best Practice Recommendations

  • Irradiate within 14 days of collection
  • Use irradiated blood as early as possible
  • Maximum shelf-life: 28 days post-irradiation

Take-Home Message

Irradiation does increase hemolysis – but:

  • It is mild and progressive
  • Becomes significant mainly with prolonged storage
  • Remains clinically acceptable within guidelines

Most importantly:

The benefit of preventing TA-GVHD far outweighs these risks.

Optimizing timing and storage is the key to balancing safety and efficacy in transfusion medicine.”

Kalyan Roy: Effect of Irradiation on Red Blood Cells

Find more posts featuring Kalyan Roy on Hemostasis Today.

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