Key result
Unilateral spinal anaesthesia causes greater hemodynamic depression than sciatico-femoral nerve block.
Why the study?
Cardiovascular effects of unilateral spinal anaesthesia versus combined sciatico-femoral nerve block during unilateral leg surgery with tourniquet were not well characterized.
Does unilateral spinal anaesthesia compared to combined sciatico-femoral nerve block affect cardiovascular function in patients undergoing unilateral leg surgery?
Population
20 ASA I-II patients scheduled for elective orthopaedic surgery with tourniquet
Comparison
Unilateral spinal anaesthesia vs combined sciatico-femoral nerve block
Design
Randomized controlled trial
Follow-up
30 minutes
Authors
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Nerve block may better preserve hemodynamics than unilateral spinal in tourniquet cases; leaves open confirmation in larger trials.
RCT (n=20)
Does unilateral spinal anaesthesia compared to combined sciatico-femoral nerve block affect cardiovascular function in patients undergoing unilateral leg surgery?
p-value: P<0.04
Combined sciatico-femoral nerve block affects cardiovascular performance less than unilateral spinal anaesthesia in patients undergoing unilateral leg surgery.
Fanelli et al. (1998) conducted an RCT in Elective orthopaedic unilateral leg surgery with tourniquet (n=20). Unilateral spinal anaesthesia vs. Combined sciatico-femoral nerve block (7 mg/kg of mepivacaine 2%) was evaluated on Haemodynamic changes (mean arterial blood pressure, cardiac index, and stroke volume index) (p=P<0.04). Unilateral spinal anaesthesia caused a small but significant decrease in mean arterial blood pressure (P<0.04), cardiac index (P<0.01), and stroke volume index (P<0.01) compared to nerve block.
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