In individuals undergoing internal fixation of the clavicular fracture, the perioperative pain-relieving effect of superficial cervical plexus alone was found to display equal effectiveness to its usage in combo with the interscalene block.

A randomized clinical trial was aimed to investigate the usage of superficial cervical plexus alone vs. in combo with interscalene block in 70 individuals undergoing surgery of the fractured clavicle.

The recruited participants were divided into two arms: (I) Subjects treated with superficial cervical plexus block, (II) Subjects treated with the combination of superficial cervical plexus block and interscalene block. The regional anesthesia techniques were carried out prior to stimulating general anesthesia. The intrasurgery isoflurane and fentanyl intake, the postsurgery morphine intake, the postsurgery pain score, the duration of postsurgery analgesia, the perioperative complications occurrence, and the patient's satisfaction were recorded.

Compared to the usage of combined cervical plexus block and interscalene block, the usage of cervical plexus block alone did not considerably alter the postsurgery morphine consumption (8.4±3.3 mg versus 7.3±3.2 mg), the time to the initial request of postsurgery analgesia (396.7 193.4 min versus 407.7±150.0 min), or the postoperative pain score. 

Also, no alteration was witnessed in the intrasurgery fentanyl and isoflurane intake, perioperative complication occurrence, or participant's satisfaction. It considerably declined phrenic nerve palsy occurrence.

The superficial cervical plexus alone has comparable analgesic efficacy when compared to its usage in combination with interscalene block in individuals undergoing surgery for clavicle fractures.