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Minimum Effective Dose of Ropivacaine for Ultrasound-guided Interscalene Block

RecruitingNAAges 18 Years - 60 YearsAllHuazhong University of Science and Technology
NCT07326943 on ClinicalTrials.gov ↗
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In plain words

What the trial is, and whether it could suit you

Inter muscular groove brachial plexus block is a commonly used peripheral nerve block technique in clinical practice, commonly used for anesthesia and analgesia in clavicle, shoulder, and humeral surgeries. The classic ultrasound-guided intermuscular groove block also involves puncturing the needle to the level of the C5/C6 anterior branch for drug injection. After injection, local anesthetics mainly wrap around C5, C6, and some C7 nerve roots. Therefore, intermuscular groove block is mainly used for shoulder, humerus, and clavicle surgery. Due to incomplete ulnar block, it is not recommended for surgery on the elbow joint and its distal end.Scholars have found that using C5 as the puncture target to implement intermuscular groove block and administering 10ml of 0.75% ropivacaine, the success rate of ulnar nerve block is 19%. The success rate of ulnar nerve block with C6 as the puncture

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📋 Eligibility rules (as published)
Inclusion Criteria: * Age range: 18-60 years old * ASAⅠ\~II * BMI between 18 and 30kg/m2 * Patients undergoing hand or forearm surgery * Sign informed consent form Exclusion Criteria: * Refusal to participate in the experiment * Merge peripheral nerve diseases * Lidocaine and ropivacaine allergy * Pregnant women * Obstructive or restrictive lung disease * Coagulation dysfunction * Long term use of opioid drugs * Infection, tumor or surgical history at the puncture site
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What it tests

  • Ultrasound guided intermuscular groove block targeting the C7 nerve root
  • Ultrasound guided intermuscular groove block targeting the C7 nerve root
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Where

1 site
Shanxi Bethune Hospital
Taiyuan, China
🤝 Taking part is your choice, and you can leave at any time. Only the trial team can confirm you are eligible — always decide together with your own doctor.
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