Study Comparing Effects of Interscalene Block Alone Versus Combined with Superficial Cervical Block on Brain Oxygen Levels and Carotid Artery Size During Shoulder Surgery

What this Trial Is About

Researchers are evaluating how two types of regional anesthesia affect brain oxygen levels and carotid artery size during shoulder surgery. The study compares the use of an interscalene block alone versus a combination of interscalene block and superficial cervical plexus block. These nerve blocks are often used to manage pain in shoulder surgeries and the study aims to understand their effects on brain oxygenation, blood flow, and postoperative pain. Participants will receive one of two anesthesia approaches under ultrasound guidance after sedation with midazolam. The first group will get an interscalene brachial plexus block alone, and the second group will receive both interscalene and superficial cervical plexus blocks. Oxygen levels in both brain hemispheres and carotid artery diameter will be measured multiple times before, during, and after surgery using near-infrared spectroscopy and ultrasonography. During the study, patients will be monitored closely with repeated measurements of cerebral oxygen saturation and carotid artery size at specific time points including before block, during surgery in the beach chair position, and postoperatively while supine. Sensory block quality and pain levels will be assessed, with recording of the time to first postoperative pain and need for analgesics. The study also tracks opioid use up to 24 hours after surgery to evaluate pain management. Participants are involved from sedation through surgery and recovery with careful monitoring of their brain and vascular responses.

Comparison Of The Effects Of Regional Anesthesia On Brain And Carotid Artery Oxygenation In Shoulder Surgery