The Utility of Comparative Local Anesthetic Blocks Versus Placebo-Controlled Blocks for the Diagnosis of Cervical Zygapophysial Joint Pain

Abstract

Whether physicians use comparative or placebo-controlled blocks depends upon the implications of their results. If innocuous therapy will be prescribed, comparative blocks might suffice. However, when diagnostic certainty is critical, such as in a medicolegal context or when surgical intervention is contemplated, placebo-controlled blocks are recommended.