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Differences in short-term complications between spinal and general anesthesia for primary total knee arthroplasty
Andrew J Pugely1, Christopher T Martin, Yubo Gao
1Department of Orthopaedic Surgery, University of Iowa Hospitals and Clinics, 200 Hawkins Drive, 01008 JPP, Iowa City, IA 52242, USA.
The Journal of Bone and Joint Surgery. American Volume
|December 28, 2012
Summary
Spinal anesthesia for total knee arthroplasty is associated with fewer complications than general anesthesia, especially for patients with multiple comorbidities. Surgeons may consider spinal anesthesia to reduce patient risk.
Area of Science:
- Orthopedic Surgery
- Anesthesiology
Background:
- Spinal anesthesia may offer advantages over general anesthesia in total knee arthroplasty (TKA), including reduced deep-vein thrombosis, shorter operative times, and less blood loss.
- The study aimed to compare thirty-day perioperative morbidity and mortality between spinal and general anesthesia in TKA patients.
Purpose of the Study:
- To identify differences in thirty-day perioperative morbidity and mortality between general and spinal anesthesia in patients undergoing total knee arthroplasty.
- To evaluate the impact of anesthetic choice on short-term outcomes following TKA.
Main Methods:
- Utilized the American College of Surgeons National Surgical Quality Improvement Program (ACS NSQIP) database (2005-2010).
- Identified and compared thirty-day complication rates and mortality between patients receiving general versus spinal anesthesia for primary TKA.
- Employed multivariate logistic regression and propensity score matching to control for confounding variables and selection bias.
Main Results:
- Of 14,052 TKA cases, 42.9% used spinal anesthesia and 57.1% used general anesthesia.
- The spinal anesthesia group showed significantly lower rates of superficial wound infections, blood transfusions, and overall complications.
- Spinal anesthesia was associated with shorter surgery length and hospital stay; general anesthesia independently increased the risk of complications (OR, 1.129).
- The difference in complication rates was most pronounced in patients with multiple preoperative comorbidities.
Conclusions:
- General anesthesia in TKA is linked to a small but significant increase in complication risk compared to spinal anesthesia.
- Spinal anesthesia may be a preferable choice for TKA patients, particularly those with multiple comorbidities.
- Anesthetic choice is an independent risk factor for short-term complications after TKA.
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