[Block of the lateral perforant branches of the subcostal and iliohypogastric nerves for proximal femur surgery].

We describe an original method to block the lateral cutaneous rami of the subcostal and iliohypogastric nerves or'iliac crest point block'to complete plexular block of the lower limb for hip surgery. The local anaesthetic is injected in front of an osterofibrous orifice of the iliac crest. In nine cases out of ten, the lateral cutaneous rami of the iliohypogastric nerve pass through this orifice and in one case out of ten, it is the one arising from the subcostal nerve. This complementary block allows the surgical incision at the level of the great trochanter.