Where Does the Blood Flow in the Femoral Head?

Femoral Head Vasculature.jpegOsseous vascular anatomy has always been clinically relevant to orthopaedists, but its importance is sometimes overlooked. In the July 19, 2017 issue of The Journal, Rego et al. provide a precise topographic map of arterial anatomy in and around the femoral head.

Ever since Trueta’s classic work published in the British volume of JBJS in 1953, we’ve known that the terminal branches of the medial femoral circumflex system (also known as the lateral epiphyseal artery complex) supply blood to the majority of the femoral head. This information has proved critical in supporting treatment decisions for the management of femoral head and neck fractures. In those cases, surgeons typically perform ORIF through an anterior approach because it is remote from this posterior vascular supply.

The details in the Rego et al. study will help today’s and tomorrow’s arthroscopists more safely manage acetabular labral tears associated with cam deformities. In those settings, when increasing the “offset” across the femoral neck to decrease impingement, surgeons should limit the depth of bone removal to avoid injury to this important vascular network. Thanks to this study, operating surgeons now have precise anatomic information (albeit derived from non-deformed cadaver hips) with which to limit the risks of increasing the femoral head offset.

Marc Swiontkowski, MD
JBJS Editor-in-Chief

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