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A Long Axis Approach to the Femoral Artery Block (FAB) for Managing Tourniquet Pain and Hypertension in Below-the-Knee Fracture Surgery

RecruitingNAAges 18 Years - anyAllNational and Kapodistrian University of Athens
NCT07548567 on ClinicalTrials.gov ↗
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In plain words

What the trial is, and whether it could suit you

This is a prospective, randomized, double-blind controlled trial evaluating an ultrasound-guided femoral artery block (FAB) using a long-axis in-plane approach compared with a short-axis approach and a control group. The study will include adult patients (ASA I-III) undergoing below-the-knee fracture surgery with tourniquet application. All patients will receive standardized anesthesia including sciatic nerve block and total intravenous anesthesia. Participants will be randomized into three groups: short-axis FAB, long-axis FAB, or control (saline injection). The primary aim is to assess the effectiveness of the long-axis FAB in reducing tourniquet-induced hypertension. Secondary outcomes include hemodynamic stability, analgesic requirements, pain scores, block characteristics, and procedural performance metrics.

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📋 Eligibility rules (as published)
Inclusion Criteria: * Age \>18 years * Physical status ASA I-III * Fluent in Greek or English * Scheduled surgery: below-knee fractures * Tourniquet duration ≥45 minutes Exclusion Criteria: * Refusal to participate * Local inflammation at block site * Known allergy to study drugs * Morbid obesity (BMI \>40) * Communication inability * Systemic neurological disease affecting peripheral nerves * Chronic pain therapy * Diabetic neuropathy * Uncontrolled hypertension
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What it tests

  • Femoral artery block - short-axis
  • Femoral artery block - long-axis
  • Normal saline injection (control)
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Where

1 site
University General Hospital Attikon
Athens, Greece
🤝 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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