Enhanced oxygen availability and preserved aggregative function in platelet concentrates stored at reduced platelet...

Area of Science:

• Biomedical science
• Hematology
• Blood banking

Background:

• Platelet concentrate storage is limited to 7 days in the UK due to quality degradation.
• Oxygen availability is crucial for platelet viability and function during storage.
• Limited research exists on direct oxygen measurements and storage condition optimization.

Purpose of the Study:

• To directly measure oxygen levels and consumption in stored platelets.
• To optimize storage conditions for improved platelet quality and function.
• To investigate the impact of modulated storage parameters on platelet viability.

Main Methods:

• Electron paramagnetic resonance oximetry used for direct oxygen measurement.
• Oxygen consumption rates measured under standard blood banking conditions.
• Mathematical modeling applied to predict oxygen distribution parameters.

Main Results:

• Reducing storage oxygen to physiological levels negatively impacts platelet function and quality.
• Lowering platelet concentration enhances oxygen availability and pH.
• A more uniform oxygen distribution is achieved throughout prolonged storage with reduced concentration.

Conclusions:

• Reduced platelet concentration maintains platelet agonist-induced aggregation comparable to standard concentrations.
• This strategy offers a viable option for prolonged platelet storage.
• Potential to reduce overall donor demand through improved storage efficacy.