Papers of the Week

S1 root block is performed for pain in the lower limbs due to S1 nerve root inflammation at the L5/S1 disc level or compression in the lateral recess. We often note anterior or posterior spread of contrast away from the L5/S1 disc through an anatomically appropriate needle tip placement. We frequently encounter vascular spread when performing S1 root blocks, and the reported incidence varies between 10.4% and 27.8%. There is no clear strategy published to manage these challenges. In such clinical scenarios, we propose a double needle and/or a multilevel needle technique.