The “Psoas Compartment Block” technique was described for the first time in 1974 by the American doctor Alon P. Winnie, in a revolutionary article for that time[1], that was detailing both the anterior approach of the lumbar plexus (3 in 1 Block or femoral nerve block), and the posterior approach.
Subsequently, doctors Chayen D., Nathan H. and Chayen M. are making a series of additions and practical indications, in an article about the posterior approach, entitled “The Psoas Compartment Block”[2], and the technique presented in this article also constitutes the basis for this study. […]