Ultrasound Imaging of the Lumbar Spine in the Transverse Plane: The Correlation Between Estimated and Actual Depth to the Epidural Space in Obese Parturients

M Balki, Y Lee, S Halpern and J. C. A. Carvalho

Anesthesia & Analgesia 108 ( 6 ): 1876 - 1881 , 2009