Ultrasound-assisted musculoskeletal procedures: A practical overview of current literature

Figure 1 Ultrasound-guided arthrocentesis allows confirmation of the needle within the articular space and real-time visualization of fluid withdrawal. Flow can be noted within the articular space by using color or doppler flow while compressing the joint space. This technique prevents inaccurately inserting the needle within solid masses. Note the needle is best visualized when the probe is perpendicular to the needle. Long arrow indicates tibia cortical bone. Short arrow indicates needle tip. Star indicates joint space.