The emergency joint: arthrocentesis and synovial fluid analysis

Area of Science:

• Orthopedics
• Rheumatology
• Diagnostic Medicine

Background:

• Joint effusions and intrasynovial hemorrhages require accurate diagnosis.
• Arthrocentesis is a key diagnostic procedure for joint pathology.

Purpose of the Study:

• To outline the indications and contraindications for arthrocentesis.
• To present a classification system for synovial fluid analysis.
• To establish criteria for differentiating septic arthritis from other joint conditions.

Main Methods:

• Review of indications and contraindications for arthrocentesis.
• Classification of synovial fluid into noninflammatory, inflammatory, septic, and hemorrhagic categories.
• Development of criteria for differentiating septic arthritis based on joint fluid analysis.

Main Results:

• Arthrocentesis is generally feasible for commonly affected joints.
• Synovial fluid analysis allows categorization into four groups, aiding diagnosis.
• Established criteria can differentiate septic arthritis requiring inpatient care.

Conclusions:

• Synovial fluid analysis via arthrocentesis is definitive for joint effusion diagnosis.
• Fluid categorization aids in differential diagnosis and treatment planning.
• Distinguishing septic arthritis is crucial for appropriate patient management.