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→Procedure: px
*Perform a '''preliminary sonography''', including color Doppler of the area to be punctured, to define the relationship of adjacent neurovascular structures.<ref name="YeapRobinson2017"/>
*Decide which '''approach''' to use. Two common anterior approaches are typically used both with the patient lying supine:
[[File:Hip joint injection by anterior longitudinal approach.jpg|thumb|left|200px|Anterior longitudinal approach. An arrow parallel to the long axis of the transducer is drawn on the skin adjacent to the end of transducer where the needle will be introduced.<ref name="YeapRobinson2017"/>]]
[[File:Ultrasonography of hip joint injection by anterior longitudinal approach.jpg|thumb|Anterior longitudinal approach. The needle is introduced from an inferior and anterior approach, lateral to the femoral neurovascular bundle (arrow). A, acetabulum; H, femoral head; N, femoral neck; double arrow – anterior joint recess.<ref name="YeapRobinson2017"/>]]
:*The '''anterior longitudinal''' approach: the probe is aligned along the long axis of the femoral neck. The needle is introduced from an anteroinferior approach and is passed into the anterior joint recess at the femoral head-neck junction.
