AANA/SOMOS Enduring Knee Program 2025-Orthobiologics in the Treatment of Common Knee Pathologies: Cannon or Squirt Gun?

Orthobiologics in the Treatment of Common Knee Pathologies: Cannon or Squirt Gun?

Video Transcription

Video Summary

The speaker shifts from a broad overview of orthobiologics to a deeper focus on platelet-rich plasma (PRP), highlighting its growing role in military medicine and an expanding PRP research network. PRP is defined as the plasma fraction of spun blood concentrated around the platelet layer, but modern understanding emphasizes that “true PRP” requires adequate platelet concentration (typically 4–9× baseline) and should be dosed and documented using CBC-based measurements. Inconsistent study results, including a negative JAMA conclusion for osteoarthritis, are attributed to products labeled PRP that failed to concentrate platelets. Newer approaches track platelet dose and other blood parameters to improve consistency and identify responders. Beyond short-term anti-inflammatory effects, PRP may create longer-lasting benefits by shifting joint immune cells (macrophage polarization toward anti-inflammatory M2 states) and releasing growth factors that recruit reparative cells. The talk distinguishes lymphocyte-enriched PRP (helpful) from granulocyte-rich PRP (pro-inflammatory), recommending the latter mainly for tendinopathy, not joint injections.

Asset Caption

Orthobiologics in the Treatment of Common Knee Pathologies: Cannon or Squirt Gun?
Jason L. Dragoo, M.D., FAANA

Keywords

platelet-rich plasma (PRP)

orthobiologics in military medicine

platelet concentration and dosing (CBC-based)

macrophage polarization (M1/M2) in joint inflammation

lymphocyte-rich vs granulocyte-rich PRP