Injections of Particulate Steroids for Nerve Root Blockade: Ultrastructural Examination of Complicating Factors

Fig. 42.1

Cervical nerve root cuffs and vessels close to the dorsal root ganglion. Distal to DRG a vessel with 1.5 mm of diameter can be identified

Fig. 42.2

Cervical nerve root cuffs and vessels close to the dorsal root ganglion. We can compare the size of the tip of a 22G Quincke needle with the diameter of the vessel

Fig. 42.3

Cervical nerve root cuffs and vessels close to the dorsal root ganglion. We can compare the size of the tip of a 22G blunt needle with the diameter of the vessel

Fig. 42.4

Cervical nerve root cuffs and vessels close to the dorsal root ganglion. We can compare the size of the tip of a 22G Quincke needle and vessel close to DRG

Fig. 42.5

Cervical nerve root cuffs and vessels close to the dorsal root ganglion. Vessel close to DRG can be seen

Fig. 42.6

Cervical nerve root cuffs and vessels close to the dorsal root ganglion. The sizes of the tip of a 22G Quincke needle and the diameter of the vessel are identified

Fig. 42.7

Cervical nerve root cuffs and vessels close to the dorsal root ganglion. The sizes of the tip of a 22G blunt needle and the diameter of the vessel are identified

Fig. 42.8

Cervical nerve root cuffs and vessels close to the dorsal root ganglion. The tip of a 22G Quincke needle piercing the wall of the vessel is identified

Fig. 42.9

Cervical nerve root cuffs and vessels close to the dorsal root ganglion. The sizes of the tip of the 22G Quincke needle and the diameter of the vessel can be compared

Fig. 42.10

Cervical nerve root cuffs and vessels close to the dorsal root ganglion. The sizes of the tips of a 22G Quincke needle and a 22G blunt needle and the diameter of the vessel can be compared, showing the different distances between their respective tips and orifices (From Reina et al. [4]; with permission)

Fig. 42.11

Cervical nerve root cuffs and vessels close to the dorsal root ganglion. The sizes of the tip of a 22G Quincke needle and the diameter of the vessel are identified (From Reina et al. [4]; with permission)

Fig. 42.12

Lumbar nerve root cuffs and vessels close to the dorsal root ganglion. The sizes of the tip of a 22G Quincke needle and the diameter of the vessel are identified

Fig. 42.13

Lumbar nerve root cuffs and vessels close to the dorsal root ganglion. The sizes of the tip of a 22G Quincke needle and the diameter of the vessel are identified

Fig. 42.14

Lumbar nerve root cuffs and vessels close to the dorsal root ganglion. The sizes of the tip of a 22G Quincke needle and the diameter of the vessel are identified