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Clinical knowledge · Orthopaedics
Orthovisc for osteoarthritis: composition, use and evidence
What Orthovisc contains, how intra-articular use is assessed and why clinical guidelines evaluate hyaluronic acid injections differently.
15 mg/mlSodium hyaluronate according to the European instructions for use
2 mlContents of the standard prefilled syringe
30 mgTotal sodium hyaluronate per 2 ml syringe
No promise of cureCartilage regrowth has not been demonstrated
Background
What is Orthovisc?
Orthovisc is a sterile, pyrogen-free solution of sodium hyaluronate in physiological saline. Sodium hyaluronate is the sodium salt of hyaluronic acid. This long-chain substance occurs naturally in the body and contributes, among other things, to the physical properties of synovial fluid.
The European instructions for use describe Orthovisc as a viscoelastic supplement or replacement for synovial fluid in human joints. The functions stated are primarily lubrication and mechanical support. The product is intended for intra-articular injection and may only be used by qualified professionals.
Important context
A product's intended purpose and its clinical benefit for an individual patient are not the same. An authorised intended use does not replace medical indication or evaluation of the evidence.
What it contains
15 mg sodium hyaluronate per millilitre. A 2 ml prefilled syringe therefore contains a total of 30 mg.
How it is used
Directly into the joint space under aseptic conditions, by healthcare professionals experienced in intra-articular injection techniques.
Physical concept
What does viscosupplementation mean?
Synovial fluid supports low-friction movement of the joint surfaces and distributes mechanical loads. Hyaluronic acid contributes to its viscosity and elasticity. In osteoarthritis, the composition and physical properties of this fluid may change.
Viscosupplementation is based on temporarily supplementing synovial fluid with an intra-articular hyaluronic acid or sodium hyaluronate solution. This mechanical and physical concept must not be equated with regeneration of damaged articular cartilage.
1
Initial situation
In osteoarthritis, the viscoelastic properties of synovial fluid may change.
2
Intra-articular administration
A sterile sodium hyaluronate solution is injected into the joint space by qualified healthcare professionals.
3
Realistic expectation
The aim is mechanical supplementation. A cure for osteoarthritis or reliable cartilage regrowth has not been demonstrated.
Products are not automatically interchangeable
Hyaluronic acid products differ in concentration, molecular weight, cross-linking, volume and injection regimen. Results for one product therefore cannot simply be transferred to all others.
Professional use
Administration, dosing regimen and product data
Administration is performed under aseptic conditions directly into the intended joint. According to the instructions for use, any joint effusion should be removed before injection. The joint must not be overfilled.
For the knee, the reviewed European instructions for use specify a series of three injections at weekly intervals. No more than one treatment series per joint should be administered within six months. The current instructions for use for the specific product and the medical decision remain decisive.
| Feature | Information according to the European instructions for use |
|---|---|
| Product type | Sterile viscoelastic sodium hyaluronate solution |
| Route of administration | Intra-articular |
| Concentration | 15 mg sodium hyaluronate per ml |
| Syringe contents | 2 ml |
| Total amount | 30 mg sodium hyaluronate |
| Other ingredients | Sodium chloride and sterile water for injection |
| Molecular weight | More than 1 million daltons |
| Storage | 2 °C to 25 °C; do not freeze |
| Intended user | Physician or use under medical supervision |
Orthovisc 2 ml on prpmed.de: view product and ordering information
Evidence, not advertising claims
What does the scientific evidence say?
The evidence on intra-articular hyaluronic acid injections for knee osteoarthritis is extensive but inconsistent. Some studies and analyses show statistically measurable improvements in pain or function. Other studies find no clinically relevant additional benefit compared with control treatments.
The German S3 guideline “Prevention and treatment of knee osteoarthritis” therefore takes a neutral position: because the evidence is contradictory, no recommendation can be made on the use of intra-articular hyaluronic acid injections. NICE and the AAOS assess routine use more critically or advise against it.
German S3 guidelineNo recommendation because of contradictory evidence
NICEDo not offer intra-articular hyaluronan injections for osteoarthritis
AAOSNot recommended for routine use in symptomatic knee osteoarthritis
Why do studies reach different conclusions?
Different products
Concentration, molecular weight, cross-linking, manufacturing process and injection regimen vary.
Different patient groups
Severity of osteoarthritis, comorbidities, duration of symptoms and previous treatments are not comparable in every study.
Different control treatments
Joint aspiration, drainage of effusion and expectation effects may also influence measured symptoms.
Statistics versus everyday relevance
A statistical difference is not automatically large enough to be noticeable or relevant to patients.
The fair summary
A change in pain or function cannot be ruled out for individual patients. However, it cannot be predicted reliably or promoted as a guaranteed treatment outcome.
Risks and limitations
Contraindications, adverse effects and realistic statements
According to the instructions for use, known hypersensitivity to any component, infection of the skin at the intended injection site, infection of the joint to be treated, known systemic bleeding disorders or a known allergy to gram-positive bacterial proteins are among the reasons not to use the product.
Temporary local discomfort or swelling may occur after intra-articular administration. The general risks of joint puncture also apply, particularly bleeding and infection. Unusually severe pain, warmth, increasing swelling or fever require prompt medical assessment.
Acceptable wording
“Orthovisc is a sodium hyaluronate solution for intra-articular use. Clinical guidelines assess its potential benefit differently.”
Unacceptable claim
“Orthovisc rebuilds cartilage, stops osteoarthritis or reliably relieves pain for a fixed period.”
No self-administration
This article is not an injection guide. Intra-articular administration requires anatomical knowledge, sterile conditions and the ability to recognise and manage complications.
Distinction
Orthovisc, corticosteroids and PRP are not the same
The three procedures are often mentioned together in relation to joint symptoms, but they are based on different products and concepts. A general ranking would be too simplistic.
Orthovisc
Ready-to-use sodium hyaluronate solution. The described concept is mainly viscoelastic and mechanical.
Corticosteroids
Medicines with anti-inflammatory effects. Use, benefit-risk profile and duration of effect differ.
PRP
Plasma obtained from the patient's own blood with concentrated platelets. Preparation and composition depend on the protocol.
The decision depends on diagnosis, severity of osteoarthritis, comorbidities, previous measures, contraindications and individual treatment goals.
Further links
Related content on prpmed.de
→Orthovisc 2 mlProduct data, pack contents and availability for healthcare professionals.
→PRP for knee painEvidence, limitations and quality factors in knee osteoarthritis.
→Basics of PRP treatmentProcedure, preparation, fields of use and realistic assessment.
→Clinical articles in the prpmed blogMore articles on PRP, orthopaedics and regenerative medicine.
FAQ
Frequently asked questions about Orthovisc
Is Orthovisc hyaluronic acid?
Orthovisc contains sodium hyaluronate, the sodium salt of hyaluronic acid. The terms are often closely linked in medical usage, but they are not chemically identical.
How much sodium hyaluronate does one syringe contain?
A 2 ml prefilled syringe contains 15 mg sodium hyaluronate per millilitre, for a total of 30 mg.
How often is Orthovisc injected?
The reviewed European instructions for use specify three injections into the knee at weekly intervals. The actual administration must follow the current IFU and medical assessment.
How quickly does Orthovisc work and how long does it last?
No fixed onset or duration that is reliable for all patients can be stated responsibly. Studies show different results; the timing and extent of any change vary between individuals.
Can Orthovisc cure osteoarthritis or rebuild cartilage?
No. A cure for osteoarthritis or regrowth of damaged articular cartilage has not been demonstrated. The instructions for use mainly describe lubrication and mechanical support.
Is Orthovisc a corticosteroid product?
No. Orthovisc contains sodium hyaluronate and no corticosteroid.
Is Orthovisc the same as PRP?
No. Orthovisc is a ready-to-use sodium hyaluronate solution. PRP is prepared from the individual patient's blood. Composition, preparation and medical concept differ.
Can Orthovisc be self-injected?
No. Injection into a joint is reserved for healthcare professionals trained in intra-articular injection techniques.
Documentation
