Flow-chart of ultrasound (US)-guided approaches to thoracic paravertebral block. IAP = inferior articulate process; IP = in-plane; lat = lateral; med = medial; OOP = out-of-plane; TP = transverse process. The arrow number refers to figures 9, 10, 14, 15, and 16. * Vandepitte C, Stopar Pintaric T, Gautier PE: Thoracic paravertebral block. Available at: http://www.nysora.com/techniques/neuraxial-and-perineuraxial-techniques/ultrasound-guided/3277-thoracic-paravertebral-block.html. Accessed June 30, 2014. † Luyet C: Paravertebral nerve block. Available at: http://www.ultrasoundblock.com/index.php/nerve-block-techniques/nerve-blockother/paravertebral-ultrasound-block. Accessed June 30, 2014. ‡ Gautier PE: European society of regional anaesthesia and pain medicine 30th annual congress 2011, Web cast. Available at: http://academy.esraeurope.org/esra/2011/30th/10994/philippe.gautier.intercostal.block.paravertebral.block.html?history_id=635072. Accessed June 30, 2014.