Determination of Utility of Intergluteal Cleft as Landmark for Neuraxial Midline in Obstetrics

Marking of intersection between inferior aspect of the intergluteal cleft and the horizontal intercristal line

Marking of intersection between the neuraxial midline, as established with the transverse spinous process view on ultrasound, and the horizontal intercristal line

The horizontal distance between these two vertical marks will be measured at the level of the intercristal line