Review Article
Responders to Platelet-Rich Plasma in Osteoarthritis: A Technical Analysis
Table 1
The Mishra and PAW classification.
(a) PAW classification system |
| (i) Platelet concentration | P1: ≤baseline | P2: >baseline–750000/µl | P3: >750000–1250000/µl | P4: >1250000/µl |
| (ii) X | Exogenous activation |
| (iii) White blood cells | (i) Total WBCs | A: above baseline | B: ≤baseline | (ii) Neutrophils: | A: above baseline | B: ≤baseline |
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(b) Mishra classification |
| | WBC | Activation? | Platelet concentration |
| Type 1 | Increased | No | A: ≥5x | B: <5x | Type 2 | Increased | Yes | A: ≥5x | B: <5x | Type 3 | Minimal or no WBCs | No | A: ≥5x | B: <5x | Type 4 | Minimal or no WBCs | Yes | A: ≥5x | B: <5x |
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