PRP Injection for Knee Osteoarthritis Epoch Medical Imaging, St Ives
PRP injections for knee osteoarthritis at Epoch Medical Imaging, St Ives. Image-guided, evidence-based. Serving the North Shore — Turramurra, Pymble, Gordon.
How Does PRP Help Knee Osteoarthritis Pain?
Knee osteoarthritis is one of the most common musculoskeletal conditions — characterised by the gradual breakdown of joint cartilage, causing pain, stiffness, and reduced function. PRP injection therapy offers a biologically active approach to managing knee osteoarthritis pain and improving joint function.
How PRP works in the osteoarthritic knee:
– Platelet growth factors delivered into the joint stimulate the production of joint fluid (synovial fluid) — improving lubrication and reducing friction within the joint.
– Anti-inflammatory properties of PRP growth factors can reduce joint inflammation, which is a significant contributor to osteoarthritis pain.
– Some evidence suggests PRP may slow cartilage breakdown and support the remaining cartilage — though the primary goal is pain reduction and function improvement.
– The concentrated healing signal provided by PRP directly targets the joint environment in a way that oral medications or physiotherapy alone cannot.
Clinical evidence shows that PRP can provide meaningful, sustained pain relief and functional improvement in mild to moderate knee osteoarthritis — with benefits typically lasting 6 to 12 months or more in responsive patients. At Epoch Medical Imaging in St Ives, knee PRP is delivered under ultrasound guidance for precise intra-articular placement.
PRP vs Cortisone vs Hyaluronic Acid Injections for the Knee
Several injection options are available for knee osteoarthritis pain management — understanding how they compare helps patients and their GPs make informed decisions.
The key consideration: Cortisone is faster-acting and excellent for acute flares, but repeated injections over time are best avoided in younger patients or when a longer-term solution is sought. PRP provides a more sustained benefit and is increasingly preferred when a biologically active, potentially cartilage-supportive approach is desired. Your GP or sports physician will advise which option best suits your clinical situation.
Who Is a Good Candidate for Knee PRP Injection?
PRP knee injection is most likely to be beneficial in a well-selected group of patients. Understanding who is an appropriate candidate helps set realistic expectations.
Ideal candidates for knee PRP include patients who:
– Have mild to moderate knee osteoarthritis (confirmed on X-ray and/or MRI)
– Have had inadequate or short-lived benefit from other conservative treatments such as physiotherapy, weight management, and analgesics
– Are seeking an alternative to cortisone with potentially longer-lasting benefit
– Wish to explore a biologically active option before considering surgical intervention
– Do not have end-stage osteoarthritis (severe bone-on-bone arthritis) — where the joint damage is too advanced for biological therapies to provide significant benefit
PRP is less likely to provide significant benefit in patients with very advanced (Grade 4) knee osteoarthritis, severe joint deformity, or significant malalignment. Your GP or sports physician will assess your suitability. A referral to Epoch Medical Imaging in St Ives includes assessment of your imaging and clinical suitability before proceeding.
How Many PRP Injections Are Needed for the Knee?
The number of PRP injections required for knee osteoarthritis varies depending on the clinical protocol used and your individual response to treatment.
Common approaches:
– Single injection protocol: One well-placed PRP injection under ultrasound guidance, with assessment of response at 6 to 8 weeks. If a good response is achieved, a repeat injection may be considered when benefit wanes (typically after 6 to 12 months).
– Series of 2 to 3 injections: Some clinical protocols involve a series of 2 or 3 injections spaced a few weeks apart, particularly for more significant osteoarthritis. Evidence comparing single versus multiple injections is evolving.
– Repeat injections: PRP does not cause the tissue concerns associated with repeated cortisone use, so repeat injections when benefit wanes are generally safe and commonly performed.
Your treating GP or sports physician will recommend a specific protocol based on your degree of osteoarthritis, previous treatments, and response to PRP. At Epoch Medical Imaging in St Ives, we work closely with referring practitioners to deliver the agreed protocol precisely and safely.
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