Arthrosamid Knee Injection London: The Gold Standard Protocol
The pioneered non-biodegradable hydrogel for permanent joint preservation. One visit. Years of pain-free movement.
Administered via the LSRI Precision Protocol by Consultant MSK Radiologists. The UK's most advanced ultrasound-guided delivery for knee osteoarthritis.
A New Era in Knee Osteoarthritis Treatment
Knee osteoarthritis (OA) affects millions, causing daily pain and reduced mobility. For years, patients have cycled through painkillers and steroid injections, feeling like surgery is the only endpoint.
Arthrosamid® is a unique, non-biodegradable hydrogel consisting of 97.5% water and 2.5% cross-linked polyacrylamide. Unlike traditional treatments that are absorbed, Arthrosamid® is a permanent implant that provides durable relief.
"Arthrosamid® integrates into the joint lining to create a cushion-like coating."
Arthrosamid® vs. Standard Injections
Understanding the difference between temporary relief and permanent joint preservation.
| Treatment | Longevity | Mechanism | Class |
|---|---|---|---|
| Steroid Injection | 3–6 Weeks | Anti-inflammatory | Temporary |
| Hyaluronic Acid | 3–6 Months | Lubrication | Absorbed |
| Arthrosamid® | 4+ Years | Scaffold / Coating | Permanent |
How It Works: The “Coating” Effect
Arthrosamid® (PAAG) is 97.5% water and 2.5% cross-linked polyacrylamide.
Durable Support
As a permanent implant, it doesn't degrade, offering pain reduction sustained for up to 4 years after a single treatment.
Delays Surgery
A viable alternative for patients with "bone-on-bone" arthritis who want to postpone or avoid invasive knee replacement.
Proven Safety
Backed by over 20 years of research in hydrogel technology and extensive clinical safety data.
Clinical and Professional Standards
We align our treatments with the latest evidence-based medicine, including support from the Canadian Orthopaedic Association (COA).
Evidence-Based Results
Clinical data from studies like Bliddal H, et al. (2021) shows significant improvements in WOMAC pain and function scores that are sustained long-term.
COA Endorsed Standards
Innovative intra-articular injections are recognized as safe and effective non-surgical alternatives for patients who are not yet ready for total knee replacement.
The LSRI Precision Protocol
The success of Arthrosamid® isn’t just about the gel—it’s about the delivery. Our protocol is a 4-step safety and precision process designed by Specialist MSK Radiologists.
Diagnostic Validation
Every patient undergoes a specialized MSK assessment to confirm joint capacity and synoyvial health.
Aseptic Accuracy
Advanced ultrasound mapping ensures the gel is integrated precisely into the intra-articular space, avoiding soft tissues.
Infection-Risk Mitigation
Rigorous clinical hygiene standards exceeding standard outpatient injection settings.
Rehab after your Arthrosamid injection
While the Arthrosamid knee injection tackles the biological cause of the pain, fully restoring your function requires deliberate movement. We strongly advocate for a comprehensive, holistic approach to your recovery:
Confidence
Regain trust in your knee's stability as the chronic pain subsides.
Consistency
Engage in regular, low-impact exercises (like swimming or cycling) to strengthen the surrounding quadriceps and hamstrings supporting the joint.
Check-ins
Continuously monitor your progress with our physiotherapy team to ensure optimal recovery and long-term success.
Expert MSK Placement
At LSRI, the Arthrosamid® procedure takes about 20 minutes and is guided by advanced ultrasound to ensure the gel is deposited with 100% precision.
-
Quick recovery — walk out the same day and return to light activities within 48 hours.
-
Performed by Consultant MSK Radiologists with elite-level diagnostic experience.
Who is it for?
The Arthrosamid knee injection is highly suitable for patients suffering from mild to severe knee osteoarthritis. This includes individuals with advanced "bone-on-bone" arthritis who may not be ready or medically eligible for major surgery. It is an ideal option if:
- You have persistent knee pain despite trying other conservative treatments.
- You want to remain active, play sports, and maintain your daily mobility.
- You are looking for a minimally invasive solution with very little downtime.
Is Arthrosamid Right for You?
While highly effective, Arthrosamid® is not suited for everyone. Candidates should meet the following criteria:
Who is NOT a Candidate?
Written by: LSRI Editorial Team
Medically Reviewed by: Dr Prashant Sankaye, Consultant MSK Radiologist — MBBS, MS, FCPS, MRCS, CCBST, FRCR, PGCE(Med), FHEA, PGDip Sports and Exercise Medicine
Last Updated: March 17, 2026
Read Time: 3 Minutes
Authoritative Patient Resources
Detailed Arthrosamid FAQ
In-depth answers to patient concerns about polyacrylamide hydrogels.
Experience 4+ Years of Knee Pain Relief
Don’t wait for surgery. Book a consultation for Arthrosamid injection in London today.