What Is a Hyaluronic Acid Knee Injection?
A hyaluronic acid knee injection is a non-surgical treatment used to help relieve knee pain caused by osteoarthritis. Hyaluronic acid is a naturally occurring substance found in joint fluid that helps lubricate and cushion the joint. With osteoarthritis, the quality and amount of hyaluronic acid may decrease. An injection can supplement the joint's natural lubrication and may reduce pain and improve mobility.
What Are the Benefits of a Hyaluronic Acid Knee Injection?
For appropriate patients, hyaluronic acid injections may offer several potential benefits, including:
- Reducing knee pain and stiffness
- Improving joint lubrication and movement
- Making walking and other daily activities more comfortable
- Supporting improved knee function
- Potentially delaying or reducing the need for more invasive treatment
- Providing an alternative for patients who want to avoid or postpone surgery
When Is a Hyaluronic Acid Knee Injection Recommended?
A physician may recommend a hyaluronic acid knee injection when conservative treatments have not provided adequate relief. It may be considered for patients who:
- Have knee osteoarthritis and persistent pain
- Experience stiffness or reduced knee mobility
- Have not achieved sufficient relief with exercise, physical therapy, activity modification, or medications
- Want to postpone knee replacement surgery
- Are not currently candidates for surgery or prefer a non-surgical treatment option
What Does Preparation for a Hyaluronic Acid Knee Injection Involve?
Preparation is generally straightforward. Your physician will review your medical history, symptoms, medications, and previous treatments and examine your knee. Imaging, such as X-rays, may be used to evaluate the extent of arthritis. Tell your physician about blood thinners, allergies, infections, or other medical conditions. Specific instructions regarding medications or activity may be provided before the procedure.
How Is a Hyaluronic Acid Knee Injection Performed?
The procedure is typically performed in an office or outpatient setting. You will be positioned comfortably with your knee accessible. The skin over the injection site is cleaned carefully to reduce the risk of infection. A local anesthetic may be used to numb the area.
The physician then inserts a sterile needle into the knee joint and delivers the hyaluronic acid. Ultrasound or another imaging technique may be used to help guide the needle accurately, depending on the physician's approach. After the medication is administered, the needle is removed and a small bandage may be placed over the injection site. The procedure usually takes only a few minutes.
What to Expect During Recovery After a Hyaluronic Acid Knee Injection?
Most patients can return home shortly after the injection. Mild soreness, swelling, or stiffness around the injection site may occur temporarily. Your physician may recommend limiting strenuous activity for a short period while continuing gentle movement as advised. Pain relief may not be immediate and can develop gradually over several days or weeks. Results vary, and some patients may experience relief for several months.
What Are the Risks and Complications of a Hyaluronic Acid Knee Injection?
Although generally considered safe, hyaluronic acid injections can have potential risks and complications, including:
- Temporary pain, swelling, or stiffness
- Bruising or tenderness at the injection site
- Skin irritation
- Infection
- Bleeding
- Allergic or inflammatory reaction
- Temporary worsening of knee pain
- Limited or no improvement in symptoms
Contact your physician if you develop significant swelling, increasing pain, redness, warmth, drainage, or fever following the injection.