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Fig 5. Ideal opacification of the right C8 nerve root before therapeutic injection. AP projection with caudal-to-cephalad fluoroscopy angulation of approximately 30°, intended to be parallel with the C7–T1 disk axis. Note how the needle comes from above; this approach is the only way to safely and successfully access the C8 nerve root and avoid the pulmonary apex. The nerve root is opacified proximally and distally with approximately 1 mL of contrast.
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