Overview
Viscosupplementation is an injection of hyaluronic acid, a gel-like substance found naturally in joint fluid, into the knee joint. It is used for knee osteoarthritis.
Evidence on how much it helps is mixed, and responses vary. It may be considered when other conservative measures have not provided enough relief.
How it works
The clinician injects hyaluronic acid into the knee joint, sometimes with ultrasound guidance. Depending on the product, treatment is one injection or a series of weekly injections.
Who it may be for
- Knee osteoarthritis
- Pain not adequately relieved by exercise, weight management and medication
- Patients who want to avoid or delay surgery
Your exam and imaging decide whether this treatment is appropriate for you.
What to expect
- Before: knee X-rays and review of prior treatments.
- During: a short office procedure.
- After: avoid strenuous activity for about 48 hours.
Recovery
Most people resume normal activity within a couple of days. Your instructions may differ.
Risks and side effects
Every procedure has risks. Your physician will review them with you, including:
- Temporary pain or swelling
- Joint stiffness
- Infection (rare)
- Allergic reaction (rare)
Insurance and cost
Many plans, including Medicare, may cover this treatment when criteria are met. We verify benefits before scheduling. See accepted insurance.
Frequently asked questions
How soon might it work?
Some people notice a change after several weeks.
Is it covered by insurance?
Many plans cover it for knee osteoarthritis when criteria are met. We verify benefits.
Can it be used in other joints?
In the United States, it is approved mainly for the knee.
This page is general patient education and does not replace advice from your own clinician. Individual results vary.