A study published in *Environment & Health* in August 2026 reveals that PVC blood storage bags leach microplastics into stored blood and preservation fluids. Researchers from China found that microplastic levels increase up to 20-fold over 30 days, accelerated by room-temperature storage and physical stress from transport. These particles attach to red blood cells, causing them to lose energy and deform. However, ultrafiltration can remove up to 85% of these particles, protecting cell quality.
PVC blood bag microplastic contamination
- ▪Researchers detected a seven- to 20-fold increase in microplastic levels in stored blood systems over 30 days compared with freshly opened blood bags.
- ▪Researchers analyzed 24 anonymous leftover blood samples from PVC blood bags stored at a hospital to detect plastic particles.
- ▪A study published in Environment & Health in August 2026 by researchers in China found PVC microplastics in blood-preservation fluids and stored blood samples.
Temperature effects on plastic shedding
- ▪In laboratory tests, microplastic levels in PVC blood bags increased when the bags were exposed to higher storage temperatures.
- ▪Storing PVC blood bags at room temperature caused significantly more plastic particles to break off into the liquid than storing them at 4 °C.
Transport simulation stress testing
- ▪Simulated transport of PVC blood bags caused the plastic to crack and peel, releasing significantly more microplastic particles than bags that remained still.
- ▪Researchers subjected brand-new PVC blood bags filled with CPDA and MAP preservation solutions to simulated transport to determine factors accelerating plastic degradation.
Red blood cell quality impacts
- ▪Exposure of healthy red blood cells to microplastic-containing fluids for 30 days caused a gradual decline in intracellular ATP and caused some cells to become spiky.
- ▪Scanning electron microscopy showed that PVC microplastic particles attached directly to the outer membranes of stored red blood cells.
Ultrafiltration mitigation solution
- ▪Ultrafiltration of blood storage liquids through fine filters removed 78% to 85% of the microplastics released from PVC blood bags.
- ▪Filtering out microplastics from blood storage fluids allowed red blood cells to maintain their normal shape and energy levels during storage.
Microplastic prevalence in medical devices
- ▪Research indicates that IV infusion bags alone can shed up to 5,455 plastic particles into every liter of fluid.
- ▪Prior studies have documented that microplastics leach from disposable medical gear, including IV infusion sets, syringes, IV bags, and kidney dialysis tubing.
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