Key result
A low mean dose of 6.5 mg of spinal anesthesia significantly reduced intraoperative hypotension compared to a high mean dose of 10.5 mg (OR 0.09) in elderly patients undergoing hip fracture repair.
Why the study?
Hypotension is the most common cardiovascular side effect of spinal anesthesia in hip surgery, prompting the need to assess the lowest effective dose to reduce intraoperative hypotension in elderly patients.
Does a low dose of spinal anesthesia reduce intraoperative hypotension in elderly patients undergoing hip fracture surgical repair compared to a high dose?
Population
344 elderly patients across 6 RCTs scheduled for surgical hip repair
Comparison
Low dose of spinal anesthesia (mean 6.5 mg) vs high dose (mean 10.5 mg)
Design
Systematic review and meta-analysis of randomized controlled trials
Authors
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Low-dose SA (∼6.5 mg) cuts hypotension risk in elderly hip repair; supports guideline dose minimization and targeted RCTs.
Meta-Analysis (n=344)
Does a low dose of spinal anesthesia reduce intraoperative hypotension in elderly patients undergoing hip fracture surgical repair compared to a high dose?
Odds Ratio: 0.09 (95% CI 0.04–0.21)
p-value: p=0.04
In elderly patients undergoing hip fracture repair, a lower dose of spinal anesthesia (mean 6.5 mg) significantly reduces the risk of intraoperative hypotension compared to a higher dose (mean 10.5 mg).
Messina et al. (2022) conducted a meta-analysis in Hip fracture (n=344). Low dose spinal anesthesia vs. High dose spinal anesthesia (mean 10.5 mg) was evaluated on Incidence of intraoperative hypotension (OR 0.09, 95% CI 0.04-0.21, p=0.04). A low mean dose of 6.5 mg of spinal anesthesia significantly reduced intraoperative hypotension compared to a high mean dose of 10.5 mg (OR 0.09) in elderly patients undergoing hip fracture repair.
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