[Lumbar novocaine block through Petit's triangle].
D001340:Autonomic Nerve Block; D002499:Centrifugation, Density Gradient; D006801:Humans; D008161:Lumbosacral Region; D011343:Procaine
D011343:Procaine
Poiasnichnaia novokainovaia blokada cherez treugol'nik Petita.