Platelet-rich plasma classification system5
| Type | White blood cells | Activated? |
|---|---|---|
| 1 | Increased over baseline | No |
| 2 | Increased over baseline | Yes |
| 3 | Minimal or no white blood cells | No |
| 4 | Minimal or no white blood cells | Yes |
A: Platelets >5× baseline.
B: Platelets <5× baseline.