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Fig. 1 | BMC Anesthesiology

Fig. 1

From: Ultrasound-guided lesser occipital nerve combined with great auricular nerve block for vestibular schwannoma craniotomy via a suboccipital retrosigmoid approach: a prospective, double-blind randomized controlled trial

Fig. 1

Surgical incisions, anatomy of cervical plexus and ultrasound-guided lesser occipital nerve combined with great auricular nerve block. (A) Three types of posterior suboccipital retrosigmoid incisions for vestibular schwannoma craniotomy. The red circle indicates the tumor site, and the blue dashed line indicates the commonly used incisions. (B) Branches of the cervical plexus and placement of the ultrasound probe for the lesser occipital nerve combined with great auricular nerve block. (C) Ultrasound images of lesser occipital nerve and greater auricular nerve. (D) Ultrasound-guided lesser occipital nerve block. (E) Ultrasound-guided greater auricular nerve block. GAN: greater auricular nerve; LON: lesser occipital nerve; SCM: Sternocleidomastoid muscle. The white arrows indicate the shaft of block needle

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BMC Anesthesiology

ISSN: 1471-2253

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