NCT07398352

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

Comparison Of The Effect Of Interscalene Block Alone And The Combination Of Interscalene Block And Superficial Cervical Block On Brain Oxygenation And Carotid Artery Diameter In Shoulder Surgery

• Status: Recruiting
• Phase: N/A
• Study type: Interventional
• Enrollment: 70 (estimated)
• Sponsor: Sanliurfa Mehmet Akif Inan Education and Research Hospital · Academic / Other
• Sex: All
• Age: 18 Years – 65 Years
• Healthy volunteers: Not accepted

Summary

The aim of our study was to compare the effects of interscalene block alone and the combination of interscalene block and superficial cervical block on cerebral oxygenation, carotid artery diameter, intraoperative hemodynamics, laboratory parameters, clinical course and postoperative pain in patients undergoing shoulder surgery.

Detailed description

This study aimed to compare the effects of interscalene block alone and interscalene block combined with superficial cervical plexus block on cerebral oxygenation, carotid artery diameter, intraoperative hemodynamics, and postoperative pain in patients undergoing shoulder surgery. Peripheral nerve blocks, particularly interscalene block, are commonly used in shoulder surgery due to their superior analgesic efficacy. Cerebral oxygenation was assessed using near-infrared spectroscopy (NIRS), a non-invasive method that reflects regional tissue oxygenation. The effects of both block techniques on bilateral cerebral oxygenation and carotid artery diameter were evaluated using NIRS and ultrasonography, respectively

Conditions

• Interscalene Block
• Superficial Cervical Block
• Cerebral Perfusion
• Shoulder Surgeries

Interventions

Type	Name	Description
PROCEDURE	Interscalene brachial plexus block	After sedating the patient with 2 mg midazolam, baseline values will be obtained, and an interscalene block will be performed under ultrasound guidance. Before the block, rSO2 values of both hemispheres of the brain and carotid artery diameter (at T1 and T5 times) will be measured and recorded using a NIRS probe at T2: 5 minute(min), T3: 10 min, T4: 15 min, and T5: 20 min. To assess the quality of the block, the sensory block will be evaluated at 20 minutes. The patient will be placed in a supine position, and after the first rSO2 value is obtained at T6, rSO2 values will be recorded at T7: 10 min, T8: 30 min, T9: 60 min, T10: surgical completion, and T11: 5 min postoperatively in the supine position. Bilateral carotid diameter(mm) will be measured at T6, T10, and T11. Before any postoperative analgesia is administered, the time of the patient's first pain and their need for analgesic will be recorded.
PROCEDURE	Interscalene brachial plexus block and superficial cervical plexus block	After sedating the patient with 2 mg midazolam, baseline values will be obtained, and a combined interscalene and superficial cervical block will be performed under ultrasound guidance. Before the block, rSO2 values of both hemispheres of the brain and carotid artery diameter(mm) (at T1 and T5 times) will be measured and recorded using a NIRS probe at T2: 5 minute, T3: 10 minute, T4: 15 minute, and T5: 20 minute. To assess the quality of the block, the sensory block will be evaluated at 20 minutes. The patient will be placed in a supine position, and after the first rSO2 value is obtained at T6, rSO2 values will be recorded at T7: 10 minute, T8: 30 minute, T9: 60 minute, T10: surgical completion, and T11: 5 minute postoperatively in the supine position. Bilateral carotid diameter(mm) will be measured at T6, T10, and T11. Before any postoperative analgesia is administered, the time of the patient's first pain, and their need for analgesic will be recorded.

Timeline

• Start date: 2026-02-23
• Primary completion: 2026-12-15
• Completion: 2026-12-15
• First posted: 2026-02-09
• Last updated: 2026-03-24

Locations

1 site across 1 country: Turkey (Türkiye)