The Impact of Ultrasound-Guided Superficial and Deep Paravertebral Nerve Blocks at the Superior Costotransverse Ligament on Hemodynamics During the Induction Phase of Thoracoscopic Lung Lobectomy: A Multicenter, Double-Blind, Randomized Controlled Trial

The purpose of this study was to evaluate whether thoracic paravertebral nerve block performed on superficial SCTL (puncture needle did not break SCTL) was more beneficial to maintaining hemodynamic stability during the induction period of thoracoscopic lobectomy compared with SCTL deep plane (puncture needle break SCTL). We performed an ultrasound-guided paravertebral nerve block while keeping the puncture needle did nit to break through the SCTL. In 20 patients who required CT (3D) imaging to observe drug diffusion 30min after nerve block, cold stimulation was used 30min after the procedure to assess the degree of sensory loss, including the anterior chest wall (midclavian line), lateral chest wall (posterior axillary line), and posterior chest wall (paravertebral area).

Ultrasound-guided thoracic paravertebral nerve block was routinely performed. SCTL was broken by a puncture needle during the ultrasound-guided thoracic paravertebral block. In 20 patients who required CT (3D) imaging to observe drug diffusion 30min after nerve block, cold stimulation was used 30min after the procedure to assess the degree of sensory loss, including the anterior chest wall (midclavian line), lateral chest wall (posterior axillary line), and posterior chest wall (paravertebral area).