Is Thoracic Paravertebral Block a Better Option Than Conscious Sedation for PRFA of Liver Tumors

Anesthesia was performed under the ultrasound guidance: the Th8 spinous process was identified, then a probe was moved lateral to medial until two adjacent transverse processes and the pleura were visible. After anaesthetising the skin with 2ml of 1% lignocaine (Lignocainum hydrochlorici, WZF 1%), the Touhy needle 22G (Smith Medical)was introduced under the real time guidance. Once in the paravertebral space, 20ml of 0,25% bupivacaine (Bupivacainum hydrochloricum WZF 0,5%, Polfa Warsaw SA) was injected with an end point of a characteristic pleural displacement.

Local infiltration anaesthesia with 0.5% lignocaine 5ml (Lignocainum hydrochlorici, WZF 1%) was applied to the skin and the potential needle path of ablation.