Patient Positioning
Patient supine, leg may be in slight external rotation.
Probe Positioning
Place the transducer on oblique longitudinal planes over the femoral neck and head. Lower ultrasonic frequencies may be necessary. Perform the injection in plane. Using steer mode may help to visualize the needle better.
Note: performing ultrasound guided arthrocentesis of the joint recess of the hip, the needle can be difficult to detect due to its angle. It is important to see at least the tip of the needle to reach the anechoic effusion.
Note: performing ultrasound guided arthrocentesis of the joint recess of the hip, ti is easier to visualize the needle by using the mode “beam stearing”, which is a technique for changing the direction of the ultrasound beam (yellow line)