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We read with great interest the recently published article about cervical sympathetic block.1 The authors state that a cervical anesthetic injection performed at the level of the middle cervical ganglion, or C6 level, will inhibit both superior preganglionic fibers and the stellate ganglion at the C7 level by spreading both upwards and downwards. At this level, they considered that both the preganglionic fibers that enervate the anterior circulation and the postganglionic fibers that enervate the posterior circulation would be blocked. Additionally, the authors have stated that there is evidence that nerve blocks performed with ultrasound guidance are superior in terms of effectiveness and have fewer reported minor complications.2 The aim of this letter is to describe a new sympathetic chain block approach in the supraclavicular fossa and explain its advantages.
The patient is placed in the lateral …
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Contributors All authors participated in the design, data collection, and writing of the final version of the manuscript.
Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.
Competing interests None declared.
Provenance and peer review Commissioned; internally peer reviewed.