Ultrasound Predictors of Difficult Spinal Anesthesia

Spinal Ultrasound is performed by an observer who records ultrasound characteristics of the intervertebral space chosen by the anesthetist who will practice spinal anesthesia

Spinal anesthesia is performed by an anesthetist after the observer recorded ultrasound characteristics of the intervertebral space chosen by the anesthetist, who is blinded to the ultrasound evaluation.