Does Ultrasound Guidance Improve Time to Perform a Spinal or Number of Attempts in Obese Patients?

The intervention group's interspaces will be determined using the curved linear probe on a Zonare ultrasound using two views.

Current clinical practice. Standard of care would have the attending anesthetist palpate the Tuffier's line to pinpoint the appropriate location for the spinal.

Subcutaneous local infiltration with a 25g needle we be performed prior to the spinal. Neuraxial technique will be attempted midline with a 25 gauge whitacre needle in the sitting position. Spinals will be attempted on either L2-L3, L3-L4, L4-L5 interspaces. The amount and type of local anesthetic/intrathecal narcotic will be left to the discretion of the Anesthetist.