A one year prospective observational study to compare the skin-dura mater distance using usg and the spinal needle length with patient in left lateral and sitting position under subarachnoid block

Abstract

Background and aims: The practice of subarachnoid block has routinely relied on the palpation of bony prominences, namely the iliac crests and spinous processes, together with sensory feedback during needle insertion. Ultrasound has proved to be a useful modality to ease in administration subarachnoid block in patients with difficult anatomies and reduce the perioperative complications. This study aims at comparing the skin subarachnoid distance(SSD)measured by Ultrasound as well as the conventional technique in relation to sitting position or lateral position. Secondly to reduce the number of attempts and complications related to spinal block