Comparison Of The Effects Of Regional Anesthesia On Brain And Carotid Artery Oxygenation In Shoulder Surgery
For patients and families
In plain language
An automatic summary of structured registry data. It is an orientation aid, not a substitute for the official protocol or a physician assessment.
- What is being studied
- The protocol lists: Interscalene brachial plexus block, Interscalene brachial plexus block and superficial cervical plexus block.
- Who it may be relevant to
- Registry conditions: Interscalene Block, Superficial Cervical Block, Cerebral Perfusion, Shoulder Surgeries. Basic parameters: 18 years — 65 years · All.
- What needs checking
- Age, condition and sex are only basic indicators. Prior treatment, laboratory values and other mandatory requirements appear in the eligibility criteria below.
- Where it takes place
- Turkey (Türkiye)
- Next step
- Save the trial, show it to the treating physician, and confirm current recruitment with the study center. Costs, documents and travel →
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Official title
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
Overview
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
Interventions
- 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 sup - 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 min
Primary outcome measures
- The effect of regional anesthesia on cerebral oxygenation [Time frame: Before block; T1 After block; T2: 5. minute, T3: 10. minute, T4: 15 minute, T5: 20 minute / In the beach chair position; T6: 1. minute, T7: 10. minute, T8: 30. minute, T9: 60. minute, T10: surgical end, Postoperative supine; T11: 5. minute]
Secondary outcome measures (2)
- The effect of regional anesthesia on carotid artery diameter [Time frame: Before block; T1 After block; T2: 5. minute, T3: 10. minute, T4: 15 minute, T5: 20 minute / In the beach chair position; T6: 1. minute, T7: 10. minute, T8: 30. minute, T9: 60. minute, T10: surgical end, Postoperative supine; T11: 5. minute]
- The effect of the two-block method on the duration of first postoperative analgesia requirement and opioid consumption [Time frame: From the end of surgery until the first request for postoperative analgesia and the amount of opioid comsumption, assessed up to 24 hours postoperatively]
Eligibility criteria
Inclusion criteria
- 18-65 years patient
- American Society of Anesthesiologists (ASA) I-II patient
Exclusion criteria
- Age < 18 years or > 65 years
- History of carotid endarterectomy
- History of cerebrovascular accident(CVA)
- Body Mass index (BMI)>35 kg/m²
- Inability to cooperate or comply with study procedures
- Liver and kidney failure
- Pregnancy and breastfeeding
- ASA pyhsical status III-V
- Contraindication to regional anesthesia
Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.
Healthy volunteers: No
Study design
- Allocation
- Randomized
- Model
- Parallel assignment
- Masking
- Single blind
- Primary purpose
- Treatment
Study locations
Turkey (Türkiye) · 1 center
- Sanliurfa Mehmet Akif Inan Education and Research Hospital — Sanliurfa
Publications
- Ahmadzadeh S, Naccari BP, Amedio LS, Koruna AE, Bass D, Shekoohi S, Kaye AD. Efficacy of Suprascapular Versus Interscalene Block for Post-Operative Pain Management in Shoulder Surgeries: A Narrative Review. Curr Pain Headache Rep. 2025 Dec 29;30(1):13. doi: 10.1007/s11916-025-01443-7. PMID 41457137
- Cosarcan SK, Gurkan Y, Dogan AT, Koyuncu O, Ercelen O. Could Interscalene Block Possibly be Protective Against Cerebral Ischemia During Shoulder Surgery in a Beach Chair Position? Cureus. 2021 Jul 31;13(7):e16773. doi: 10.7759/cureus.16773. eCollection 2021 Jul. PMID 34476141
- Kaye AD, Upshaw WC, Holley C, Bailey PD, Tassin JP, Frolov MV, Sudini S, Miller BC, Palowsky ZR, Kataria S, Ahmadzadeh S, Shekoohi S, Robinson CL. Overview and Comparison of Interscalene Block Techniques for Brachial Plexus Pain Management. Curr Pain Headache Rep. 2024 Dec 30;29(1):1. doi: 10.1007/s11916-024-01346-z. PMID 39739068
Identifiers
NCT: NCT07398352 · ISBSPBBO25