The most correct statement concerning a unilateral paravertebral block is
ExplanationAdvantages of properly placed paravertebral nerve blocks include reduced degrees of local anesthetic–induced sympathectomy compared to
epidural or spinal anesthesia and a lower risk of local anesthetic systemic toxicity as compared with intercostal nerve blocks. However, one of the major
concerns for potential complications is development of a pneumothorax, and paravertebral blocks can be associated with variable degrees of local
anesthetic epidural spread, especially when placing bilateral paravertebral blocks.
