Knee Aspiration
Knee aspiration is a minimally invasive procedure used to remove excess fluid from the knee joint. Removing accumulated fluid may help reduce pressure, swelling, and discomfort while also providing useful information about certain joint conditions.
Knee Aspiration May Help
- Remove excess fluid from the knee
- Reduce pressure and swelling
- Improve comfort and movement
- Help evaluate the cause of joint swelling
- Prepare the joint for selected treatments
What Is Knee Aspiration?
Knee aspiration, also called arthrocentesis, is a procedure in which a healthcare provider uses a needle to remove excess fluid from inside the knee joint.
Fluid can build up in the knee because of arthritis, inflammation, injury, infection, gout, or other joint conditions. Removing excess fluid may help relieve pressure and swelling.
- Removes excess synovial fluid from the joint
- May reduce swelling and pressure
- Can help improve comfort and mobility
- Joint fluid may be analyzed when medically appropriate
Potential Benefits
Knee aspiration may provide relief for selected patients with fluid buildup and swelling. Your provider will determine whether aspiration is appropriate based on your symptoms and condition.
Why Patients May Consider Aspiration
- May reduce swelling in the knee
- May relieve pressure and discomfort
- May improve range of motion
- Can help evaluate certain causes of joint swelling
Treatment Advantages
- Minimally invasive procedure
- Typically performed in an outpatient setting
- Does not require surgery
- May be combined with selected injection treatments
How Knee Aspiration Works
Knee aspiration generally involves a few straightforward steps performed by a qualified healthcare provider.
Evaluation
Your provider evaluates your symptoms, medical history, swelling, and affected knee.
Aspiration
A sterile needle is carefully placed into the joint to remove excess fluid.
Aftercare
Your provider will provide individualized instructions and discuss any recommended follow-up treatment.
When Knee Aspiration May Be Considered
Knee aspiration may be considered when excess fluid or swelling is present. An evaluation is necessary to determine the underlying cause and whether aspiration is appropriate.
Common Reasons
- Significant knee swelling
- Fluid buildup inside the joint
- Arthritis-related inflammation
- Knee injury or trauma
Diagnostic Considerations
- Evaluation of inflammatory joint conditions
- Evaluation for possible gout
- Evaluation when infection is suspected
- Analysis of joint fluid when medically indicated
Knee Aspiration Videos
Explore educational information about knee aspiration, joint fluid removal, knee swelling, and treatment options for selected joint conditions.
Knee Aspiration
Learn about knee aspiration and the removal of excess fluid from a swollen knee.
Knee Aspiration Education
A short educational look at knee aspiration and joint fluid removal.
Knee Treatment Education
Learn more about knee swelling, joint fluid, and treatment considerations.
What Patients Should Know
Understanding the procedure, potential benefits, risks, and alternatives can help you make an informed decision with your healthcare provider.
- Knee aspiration is not appropriate for every patient or cause of knee swelling.
- Your provider will evaluate your symptoms and medical history.
- Joint fluid may be collected for laboratory analysis when medically appropriate.
- Potential risks, benefits, and alternatives should be discussed before treatment.
- Follow-up and activity recommendations may vary depending on the individual patient.