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Short-term complications in hip fracture surgery using spinal versus general anaesthesia
Adam C Fields1, James D Dieterich1, Kristin Buterbaugh1
1Department of Orthopaedics, Icahn School of Medicine at Mount Sinai, United States.
Background:
Spinal anaesthesia when compared to general anaesthesia has been shown to decrease postoperative morbidity in orthopaedic surgery. The aim of the present study was to assess the differences in thirty-day morbidity and mortality for patients undergoing hip fracture surgery with spinal versus general anaesthesia.
Methods:
The American College of Surgeons National Surgical Quality and Improvement Program (NSQIP) database was used to identify patients who underwent hip fracture surgery with general or spinal anaesthesia between 2010 and 2012 using CPT codes 27245 and 27244. Patient characteristics, complications, and mortality rates were compared. Univariate analysis and multivariate logistic regression were used to identify predictors of thirty-day complications. Stratified propensity scores were employed to adjust for potential selection bias between cohorts.
Results:
6133 patients underwent hip fracture surgery with spinal or general anaesthesia; 4318 (72.6%) patients underwent fracture repair with general anaesthesia and 1815 (27.4%) underwent fracture repair with spinal anaesthesia. The spinal anaesthesia group had a lower unadjusted frequency of blood transfusions (39.34% versus 45.49%; p<0.0001), deep vein thrombosis (0.72% versus 1.64%; p=0.004), urinary tract infection (8.87% versus 5.76%; p<0.0001), and overall complications (45.75% versus 48.97%; p=0.001). The length of surgery was shorter in the spinal anaesthesia group (55.81 versus 65.36 min; p<0.0001). After multivariate logistic regression was used to adjust for confounders, general anaesthesia (odds ratio, 1.29; 95% confidence interval, 1.14-1.47; p=0.0002) was significantly associated with increased risk for complication after hip fracture surgery. Age, female sex, body mass index, hypertension, transfusion, emergency procedure, operation time, and ASA score were risk factors for complications after hip fracture repair (all p<0.05).
Conclusions:
Patients who underwent hip fracture surgery with general anaesthesia had a higher risk of thirty-day complications as compared to patients who underwent hip fracture repair with spinal anaesthesia. Surgeons should consider using spinal anaesthesia for hip fracture surgery.
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