Platelet-Rich Plasma Primer: How It Works
In this article
Platelet-rich plasma, or PRP, concentrates platelets from your own blood for use at an injured or diseased site. It is an option in some sports-medicine treatment plans. The key question is how the preparation fits your particular condition, alongside the rest of your recovery.
From a blood sample to an injection
The process begins with a blood draw. A centrifuge spins the sample to separate its components, and the collected platelets are concentrated in plasma, the liquid part of blood. The preparation is then injected into the area being treated. Ultrasound may help guide the placement, as Hospital for Special Surgery explains.
Platelets are best known for helping blood clot, but they also contain growth factors involved in tissue repair. Concentrating them is the basis for interest in PRP. Researchers investigate several parts of healing, including angiogenesis—the formation of new blood vessels. A 2020 experiment by Xu and colleagues, for example, examined skin-surface repair in mice.
Which injuries are being treated?
AAOS describes evidence for certain chronic tendon injuries, especially tennis elbow, and for low- to moderate-grade knee osteoarthritis. Evidence for other uses is more mixed. The injured structure, whether the problem is recent or longstanding, the patient’s health and the preparation can all affect the treatment decision.
For someone with a tendon problem, it is worth understanding the diagnosis before comparing treatments. The goal might be to reduce pain or improve function so that activity becomes more manageable. A clinician can explain how an injection would fit with rehabilitation, changes in training or other care.
A 2018 survey of professional and collegiate team physicians found frequent PRP use alongside differences in the formulations and treatment approaches they chose. That variation makes the details of your own proposed plan worth discussing: what preparation is being used, where it will be placed and what improvement the clinician expects.
What happens during recovery?
An injection appointment is one part of the process. AAOS describes the use of a local anesthetic in some treatments and notes that pain may increase during the first week or two. A beneficial effect can take several weeks to become apparent. Ask about the expected course for your condition and when the response will be assessed.
The plan should also explain activity and follow-up. PRP can sit alongside rehabilitation and recovery rather than making them unnecessary. Discuss medicine use with the treating professional; an injection’s potential to reduce reliance on pain medication is different from an instruction to stop a prescribed drug yourself.
Using your own blood still involves a procedure. Possible problems include injection-site pain and infection, along with other injection-related complications. Ask how the preparation is handled, what symptoms should prompt a call and who will manage follow-up.
Compare the whole plan and cost
A useful estimate includes the injection, any imaging, follow-up and rehabilitation. Coverage varies, and AAOS advises checking eligibility with the insurance carrier because few plans provide even partial reimbursement. Device clearance and approval are also distinct regulatory questions; ask what any FDA claim about the preparation system actually covers.
For historical context, a 2023 comparison put PRP at $500–$2,000 and physical rehabilitation at $30–$400 per session, with an example of two to three sessions weekly for eight weeks. Those figures help explain the cost question, but a current itemized estimate for the complete plan is more useful than comparing one injection with a generic therapy schedule.
Start with the condition and the goal, then ask how benefit, recovery and cost will be followed over time. A clear explanation of those details gives you something practical to discuss with your healthcare team.
References
Hall, Michael P. MD; Band, Phillip A. PhD; Meislin, Robert J. MD; Jazrawi, Laith M. MD; Cardone, Dennis A. DO. Platelet-rich Plasma: Current Concepts and Application in Sports Medicine. Journal of the American Academy of Orthopaedic Surgeons 17(10):p 602-608, October 2009.