Arthrocentesis

Arthrocentesis, also known as joint aspiration, is a medical procedure wherein a sterile needle and syringe are used to drain fluid from the joint cavity. This procedure is commonly performed to diagnose joint disorders, relieve joint swelling, and administer medications directly into the joint space.

Indications

Arthrocentesis is indicated for various conditions, including:

• Septic arthritis
• Gout
• Pseudogout
• Rheumatoid arthritis
• Osteoarthritis
• Hemarthrosis
• Unexplained joint effusion

Procedure

The procedure typically involves the following steps:

1. The skin over the joint is cleaned with an antiseptic solution.
2. Local anesthesia is administered to numb the area.
3. A sterile needle is inserted into the joint space.
4. Synovial fluid is aspirated using a syringe.
5. The fluid is sent to a laboratory for analysis.

Complications

While arthrocentesis is generally safe, potential complications include:

• Infection
• Bleeding
• Pain at the puncture site
• Injury to the joint structures

Synovial Fluid Analysis

The aspirated synovial fluid is analyzed for:

• Cell count
• Crystal analysis
• Gram stain and culture
• Glucose and protein levels

Therapeutic Uses

In addition to diagnostic purposes, arthrocentesis can be used therapeutically to:

• Relieve joint pressure and pain
• Administer intra-articular medications such as corticosteroids or hyaluronic acid

Related Pages

• Septic arthritis
• Gout
• Rheumatoid arthritis
• Osteoarthritis
• Synovial fluid