The acetabulum is divided into four quadrants with two bisecting lines

The acetabulum is divided into four quadrants with two bisecting lines. One from the ASIS to the center of the acetabular socket and the second is perpendicular to it. This is a source of repeat questions concerning the danger/safe zones of various quadrants for the placement of acetabular screws. anterosuperior quadrant may injure the external iliac artery and vein. The anteroinferior quadrant may injure the obturator artery, nerve, or vein. The posterosuperior quadrant may injure the sciatic nerve, superior gluteal nerve, and vessels and is considered the “safe zone”. Posteroinferior quadrant may injure the inferior gluteal, internal pudendal structures. In general, posterior quadrants are safe except if long screws are placed posteroinferiorly.

Review more high-yield concepts about THA Acetabular Screw Fixation on the most recent episode of The Orthobullets Podcast. Listen wherever you get your podcasts! https://anchor.fm/…/ReconTHA-Acetabular-Screw-Fix…/a-a22kffb

95584636_10163355642330468_7977574523056685056_n