Nerve Root and Types of Needles Used in Transforaminal Injections
Fig. 43.1 Blunt needles. (a) 22G Epimed® needle. (b) 20G radiofrequency needle (Cosman Medical®, Burlington, MA). Scanning electron microscopy. Magnification ×18 (From Hernández-Garcia et al. [3]; with permission) Fig. 43.2…