Related Experiment Videos
Leg blood flow during total hip replacement under spinal or general anaesthesia
F M Davis1, V G Laurenson, W J Gillespie
1Division of Anaesthesia, Christchurch Clinical School of Medicine, University of Otago, New Zealand.
Anaesthesia and Intensive Care
|May 1, 1989
Summary
Spinal anesthesia increased calf blood flow more than general anesthesia during hip replacement surgery. While both anesthesia types affected blood flow, spinal anesthesia showed sustained elevation and more hyperemia in the surgical leg.
Area of Science:
- Anesthesiology
- Vascular Surgery
- Orthopedic Surgery
Background:
- Total hip arthroplasty (THA) is a common orthopedic procedure.
- Perioperative blood flow changes can impact patient outcomes.
- Understanding anesthesia-specific effects on circulation is crucial for surgical safety.
Purpose of the Study:
- To compare calf blood flow during total hip arthroplasty under spinal versus general anesthesia.
- To investigate the impact of anesthetic technique on perioperative hemodynamics.
- To assess the relationship between blood flow changes and deep vein thrombosis (DVT) risk.
Main Methods:
- 122 patients undergoing THA were randomly assigned to spinal or general anesthesia.
- Calf blood flow was measured using venous occlusion impedance plethysmography nine times perioperatively.
- Venous outflow resistance was also monitored throughout the procedure.
Main Results:
- Mean blood flow in the non-surgical leg increased >50% post-induction, remaining elevated with spinal anesthesia but returning to baseline with general anesthesia.
- Surgical manipulations, especially femoral component insertion, caused significant blood flow reductions in the surgical leg.
- Hyperemia was more common with spinal anesthesia after joint relocation, while venous outflow resistance increased slightly in both groups, more so with general anesthesia.
Conclusions:
- Spinal anesthesia appears to maintain better calf blood flow compared to general anesthesia during THA.
- Significant perioperative blood flow alterations occur, influenced by both anesthesia type and surgical events.
- No direct correlation was found between observed blood flow patterns and postoperative DVT incidence in this study.