Infection Is a Serious Consideration With Arthrosamid®
Infection is a recognised risk with any joint injection. However, with Arthrosamid® — a non-absorbable hydrogel intended to remain in the joint — prevention and early recognition are important.
Arthrosamid® (a registered trademark of Contura A/S.).
Difficult to Eradicate
Because the Arthrosamid® hydrogel is non-absorbable and intended to remain in the joint.
Prolonged Treatment
Should infection occur, it may require extended clinical intervention.
Surgical Intervention
Surgery may occasionally be required to investigate or treat a serious complication.
Reviewed byProfessor Paul YF Lee MBBch, FRCS (Tr & Orth), PhDCartilage and joint preservation expertiseQuick answer
Joint infection is an important potential complication of any intra-articular injection. London Cartilage Clinic uses an antibiotic protocol, sterile-field preparation and ultrasound guidance, but no protocol eliminates infection risk. Increasing pain, heat, redness or swelling—especially with fever, chills or feeling unwell—needs prompt medical advice.
Our Approach:
Infection Prevention From the Start
For Arthrosamid® at London Cartilage Clinic, Professor Paul YF Lee uses a documented local infection-prevention protocol. This page describes that process without making a superiority claim about other providers.
Professor Lee reviews the diagnosis, imaging, contraindications and antibiotic considerations before deciding whether treatment should proceed.
London Cartilage Clinic uses this documented local protocol alongside sterile-field preparation. It reduces avoidable risk but does not guarantee prevention.
Antibiotic Protocol
All Arthrosamid® injections at our clinics are performed with intravenous (IV) antibiotics as a standard safety measure.
Antibiotics: Product Requirement and London Cartilage Clinic Protocol
Manufacturer information requires prophylactic antibiotic cover; London Cartilage Clinic's verified local protocol uses an intravenous route.
Manufacturer professional information
- Requires prophylactic antibiotic cover
- Sets product-specific intended use and contraindications
- Should be read as manufacturer-owned professional information
London Cartilage Clinic's local implementation
- Uses intravenous antibiotic cover before the injection
- Checks allergy, interaction and medical history
- Includes sterile-field preparation and written warning-sign advice
London Cartilage Clinic uses intravenous prophylactic antibiotics as part of its documented protocol; product information and the patient's clinical history are reviewed before use.
How the Local Protocol Is Informed
The local antibiotic and sterile-field protocol is informed by:
- Manufacturer professional information and product precautions
- Published evidence considered in its correct clinical context
- Individual allergy, interaction and medical-history checks
These safeguards reduce avoidable risk but do not establish superiority or make infection impossible.
What Patients
Should Understand
- Infection after Arthrosamid® injection is a recognised, potentially serious risk
- Prevention matters more with non-biodegradable materials
- Our clinic takes a deliberately conservative stance
- This is one reason Arthrosamid® is not offered routinely and only after proper assessment
If a patient is uncomfortable with IV antibiotics, Arthrosamid® may not be the right option for them.
Transparency Matters
Manufacturer professional information requires prophylactic antibiotic cover. The route, drug, dose, timing, allergies and interaction checks are clinical decisions. London Cartilage Clinic's documented local protocol uses intravenous cover.
The requirement for prophylaxis comes from manufacturer-owned professional information; the intravenous protocol described here is London Cartilage Clinic's local practice.
In Summary
Infection is a major consideration with Arthrosamid®
Arthrosamid® infections may be more complex to manage
IV antibiotics are standard practice at our clinic
Oral antibiotics are not recommended due to concerns over reliability and effectiveness
The protocol is explained without using an unverified activity total as evidence of safety
Safety is not an afterthought — it is built into the treatment.
Am I Suitable?
Take the Arthrosamid® Suitability Assessment
Answer eight short questions on the dedicated assessment page to organise the information relevant to your consultation. The questionnaire is a decision aid and does not diagnose knee pain or confirm treatment suitability.
Start the Suitability AssessmentVetting Your Arthrosamid® Clinic
Questions to ask any clinic before Arthrosamid®
Infection is one of the most serious potential complications of Arthrosamid®. These questions help patients compare assessment, sterile technique, antibiotic decisions and aftercare without assuming any process eliminates risk.
Is the injection delivered under real-time ultrasound guidance?
Ultrasound helps the clinician visualise the joint and needle in real time. It supports delivery but cannot guarantee placement, safety or outcome.Who performs the injection?
A consultant-led pathway where the clinician you consult is the clinician who injects gives you a single point of accountability. A consultation/inject hand-off is cheaper to staff but is not the same service.What infection-prevention protocol is used?
Joint infection after Arthrosamid® is rare but serious. Ask the clinic to walk you through their sterile-field standards, antibiotic policy, and how a post-injection flare is managed.Are IV antibiotics used as part of the protocol?
Routine IV antibiotic cover is a deliberately conservative choice; not every UK clinic uses it. Ask whether IV is standard, oral-only is offered, or no antibiotic cover is used at all — and whether the choice is yours.What happens if symptoms flare after treatment?
A short-lived post-injection flare is common; a persistent flare warrants prompt review. Ask about out-of-hours support, escalation pathway and whether further appointments are included.What clinical follow-up is included as standard?
A six-week clinical review is the minimum we would recommend. Some packages skip follow-up entirely or quote it separately later.How many Arthrosamid® injections has the clinician performed?
Experience may be relevant, but round activity totals are not outcome evidence. Ask how a number is defined, whether it has an audited source and its “as of” date.How does the clinic decide who is NOT suitable for Arthrosamid®?
A clinic willing to decline unsuitable cases is selecting for outcomes. A clinic that says yes to everyone is selecting for revenue. The first conversation should include an honest “this may not be right for you” pathway.
Watch Out For
Red flags when choosing an Arthrosamid® provider
No clear discussion of infection risk
Infection is rare but is the most serious complication. A clinic that does not mention it or skips the antibiotic question is leaving a known risk unaddressed.No clear antibiotic protocol
Ask explicitly whether antibiotics are routine, whether IV or oral is used, and the reasoning. Vague answers are a signal.No imaging review before treatment
An MRI or detailed ultrasound review before injection is what tells us whether Arthrosamid® is the right treatment. Skipping imaging review compresses the assessment.Injection offered without a suitability assessment
Arthrosamid® is not right for every osteoarthritis patient. A consultation that ends with “book the injection” without a clinical decision is selling, not treating.No follow-up plan
If the post-treatment plan is “see how you go”, you are paying for an injection, not for a service. Six-week clinical review should be the minimum.Guaranteed or permanent cure claims
Arthrosamid® is intended for symptom management, not as a cure. Claims of permanent results, guaranteed outcomes, cartilage regeneration or prevention of surgery go beyond the evidence.
Infection Risk & Prevention
Frequently asked questions
See also the broader Arthrosamid® side effects and safety page for non-infection complications.
How common is infection after an Arthrosamid® injection?
Joint infection is a recognised serious complication of an intra-articular injection. This page does not quote an incidence figure because available data and definitions do not justify a precise clinic-specific estimate. Prevention and a clear action plan matter, but no protocol eliminates risk.
Why does London Cartilage Clinic use IV antibiotics for Arthrosamid®?
Arthrosamid is non-absorbable and intended to remain in the joint, which can make a serious complication difficult to manage. Manufacturer professional information requires prophylactic antibiotics. London Cartilage Clinic's documented local protocol uses intravenous antibiotic cover and sterile-field preparation; this cannot make infection risk zero.
Can I have oral antibiotics instead of IV?
London Cartilage Clinic's protocol uses intravenous antibiotic cover. Allergies, interactions, previous reactions and other clinical reasons are reviewed before treatment. The treating clinician decides whether it is safe to proceed; the protocol should not be altered by a webpage.
What happens if I develop infection symptoms after the injection?
A mild temporary flare can occur, but worsening pain, progressive swelling, heat, redness, wound discharge, fever, chills or feeling systemically unwell needs prompt medical advice. Severe or rapidly worsening symptoms require urgent same-day assessment. Use the clinic contact route supplied in your written aftercare; seek NHS urgent care or A&E when needed.
Does the infection risk go up with more boxes of Arthrosamid®?
This page does not invent a box-by-box infection estimate. Manufacturer professional information describes a 6 ml knee injection. The treating clinician must confirm the plan, indication and product-specific precautions before treatment.
How long am I followed up after an Arthrosamid® injection?
We follow patients clinically at six weeks as standard, with a direct line for any questions in between. Onward physiotherapy guidance is included where helpful. Patients who travel from outside London are followed up by phone or video where in-person review is impractical.
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Long-lasting relief starts with the right decision — not just an injection.