None listed
Conditions
Brief summary
To determine whether ultrasound guided supraclavicular block provides more important increase in brachial artery blood flow and more important vasodilation of the cephalic vein than infraclavicular block. If the primary hypothesis is confirmed, this study will provide evidence supporting the use of the supraclavicular block for the confection of humeral-cephalic arteriovenous fistula.
Interventions
Common management for both groups will include the following: 1. No pre-medication 2. Standard monitoring: ECG, non invasive blood pressure, oxymetry. 3. Peripheral venous cannulation Supraclavicular (SB) group: Supraclavicular block 15 ml lidocaine 2% + 15 ml bupivacaine 0.5% in a double point injection ultrasound guided supraclavicular brachial plexus block Infraclavicular (IB) group: Infraclavicular block 15 ml lidocaine 2% + 15 ml bupivacaine 0.5% in a triple point injection ultrasound guided infraclavicular brachial plexus block The duration of each procedure is approximately 15 minutes
Sponsors
Study design
Eligibility
Inclusion criteria
Patients requiring hemodialysis and scheuled to elective confection of humeral-cephalic arteriovenous fistula under regional anaesthesia
Exclusion criteria
1. Patient refusal 2. Allergy to local anesthetics 3. Existing neurological disorders, neuropathy of the operative extremity 4. Infection at site of needle puncture 5. Coagulation disorders