Abstract
Recent reports suggest that ultrasound-guided stellate ganglion block (SGB) is safer and more accurate than classic SGB by the using the surface anatomical landmark. However, previous reports concern the classic paratracheal approach using a small specialized curved probe, which may not be appropriate in some patients. The authors have attempted several approaches, including paratracheal, trans-thyroidal, lateral paracarotid, and lateral approaches, to find a safe and suitable method for real-time ultrasound-guided SGB using a standard high-frequency linear probe. A total of 27 injections were performed on 27 patients with sensorineural hearing loss. The lateral paracarotid out-of-plane and lateral in-plane approaches were identified as the easiest and safest methods among the four tested. In this report, we describe a new lateral paracarotid approach for ultrasound-guided SGB. An ipsilateral paratracheal short-axis transverse scan was acquired at the C6 level with a linear probe (6–13 MHz). The probe was moved laterally, scanning the thyroid, carotid artery, internal jugular vein, longus colli muscle, and the transverse process of the C6, placing the carotid artery in the middle of the view. Light pressure was applied to the probe postero-medially to displace the carotid artery medially and completely compress the internal jugular vein. The needle was inserted out-of-plane between the lateral margin of the carotid artery and Chassaignac’s tubercle, traversing the collapsed internal jugular vein, and targeted between the longus colli muscle and the prevertebral fascia. A total of 4 ml of 0.2% ropivacaine was injected for each procedure after a negative aspiration test. Successful blockade was confirmed with the onset of Horner’s sign. All 27 injections resulted in successful blockade with Horner’s sign presenting within 5 min after injection. Side effects were minor and caused minimal discomfort; they included hoarseness and a foreign body sensation. No hematomas formed after any injections. We suggest that this new lateral paracarotid approach, with out-of plane needle insertion at the C6 tubercle under transverse scan, is a convenient and safe method for performing real-time ultrasound-guided SGB, as it provides a wide, safe space for needle passage without risking thyroid or esophageal injury.
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Kim, H., Song, S.O. & Jung, G. A lateral paracarotid approach for ultrasound-guided stellate ganglion block with a linear probe. J Anesth 31, 458–462 (2017). https://doi.org/10.1007/s00540-017-2354-y
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DOI: https://doi.org/10.1007/s00540-017-2354-y