Superficial cervical plexus block is achieved by injecting 2ml of 1%xylocaine and 3ml 0.
Strict vigilance is kept for the Complications of cervical plexus block like intravascular injection/injury to vertebral artery(loss of consciousness, seizures)temporary partial phrenic nerve block (8), CNS toxicity (tinnitus, disorientation, perioral numbness), cardiovascular collapse, recurrent laryngeal nerve blockade (hoarseness of voice), Horner's syndrome (ptosis, miosis, anhydrosis) vagal nerve blockade, Epidural/ subarachnoid (total spinal), brachial nerve plexus blockade, hematoma.
All the patients tolerated the procedure well under bilateral cervical plexus block, except for 3 patients who required small supplemental doses of Propofol 50mg during surgery.
Phrenic, vagus, glossopharyngeal and cervical sympathetic chain nerve involvement have also been reported, although these are associated more with a deep cervical plexus block.
As long as these precautions are in place, we recommend the use of a superficial cervical plexus block, combined with an auriculotemporal nerve block if necessary, for selected patients with dental abcesses requiring urgent incision and drainage, who have difficult airways related to swelling and limited mouth-opening.
Our work on the deep cervical plexus block has utilized the vascular access Site ~ Rite [R] 11 7.
In our experience, the Site ~ Rite [R] II ultrasound also gives satisfactory images of the vertebral artery, even in obese patients where palpation of the traditional landmarks for the deep cervical plexus block are very difficult.