Blood Handling
Why Do Platelets Need Agitation? Gas Exchange in Storage
Updated 2026-06-13 · Hotech Technical Team
In short
Platelets need continuous gentle agitation during storage mainly to maintain gas exchange in the bag (oxygen in, carbon dioxide out), prevent settling and aggregation, and keep pH and environment uniform — preserving viability and function.
Maintaining gas exchange
- Platelets keep metabolizing, consuming oxygen and producing CO₂ and lactate. With gas-permeable bags, agitation promotes exchange and stabilizes pH, preventing loss of viability from hypoxia and acidification.
Preventing settling and aggregation
- Standing causes platelets to settle and clump, harming quality; agitation keeps them suspended and dispersed.
Agitation must be gentle
- Agitation must be gentle; overly vigorous motion can damage platelets, so dedicated devices use soft reciprocating or orbital motion.
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FAQ
What if platelets are not agitated?
It can cause hypoxia, acidification and settling/aggregation, reducing viability and function.
How fast should agitation be?
Gentle, slow agitation is sufficient; vigorous motion harms platelets, and dedicated devices use appropriate settings.
How long can agitation stop?
Keep agitation continuous; the effect of brief interruptions varies, and in practice the goal is no interruption.