Ultrasound-Guided Cervical Nerve Root Block: Does Volume Affect the Spreading Pattern?

Abstract

The spreading pattern of injected solution in US-CRB could be partially affected by the injectant volume. However, further studies are needed to assess the importance of other factors, such as needle position and physiological effects.

Vascular Evaluation around the Cervical Nerve Roots during Ultrasound-Guided Cervical Nerve Root Block

“…The distance between arteries and the line was measured on the basis of the scale of the ultrasound equipment. To more accurately diagnose the cervical level responsible for the symptoms, nerve root block was performed with the target nerve root on the "crab-claw structure," which consists of anterior and posterior tubercles, as close to the nerve compression site as possible 10) (Fig. 3).…”

Ultrasound-Guided Injection to the Fifth Cervical Spinal Nerve Root Level

“…2). 1,3 This posterior to anterior injection approach is relatively safe as compared with the anterior to posterior approach or other injection techniques such as transforaminal epidural steroid injection. 6 To date, there are no reported complications using such US-CRB injection approach.…”

“…Treatments include cervical traction, exercises, and analgesics. 1 Although surgery remains as the mainstream of treatment, its long-lasting efficacy is still unclear. 2 Cervical transforaminal steroid injection can be used to treat radicular pain caused by disc disorders.…”

“…1 After the injection, the injectate can then spread close to the target nerve, reducing inflammation of the injured nerve roots and suppressing the transmission of nociceptive C-fibers. 1,4 This article demonstrates how US-guided injection is performed to the cervical spinal fifth nerve root level because this is the frequent site that causes radicular pain.…”

Ultrasound-Guided Injection to the Fifth Cervical Spinal Nerve Root Level

“…5 The objective of CRB is to place the needle in the intertubercular groove situated between the nerve root and the posterior tubercle. 1 After the injection, the injectate can then spread close to the target nerve, reducing inflammation of the injured nerve roots and suppressing the transmission of nociceptive C-fibers. 1,4 This article demonstrates how US-guided injection is performed to the cervical spinal fifth nerve root level because this is the frequent site that causes radicular pain.…”