Fentanyl and Dexmedetomidine as Adjuvants to Bupivacaine in Ultrasound-guided Superficial Cervical Plexus Block in Thyroid Surgeries

Patients received superficial cervical plexus block with 1 ml of normal saline with 7ml bupivacaine 0.25% per side without adjuvants.

Patients received superficial cervical plexus block with fentanyl 1 ml (50 microgram) as an adjuvant to 7ml bupivacaine 0.25% per side.

Patients received superficial cervical plexus block with dexmedetomidine 0.5mcg/kg in 1 ml of normal saline as an adjuvant to 7ml bupivacaine 0.25% per side.