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      Spinal anesthesia in contemporary and complex lumbar spine surgery: experience with 343 cases

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          Abstract

          OBJECTIVE

          Spinal anesthesia (SA) is an alternative to general anesthesia (GA) for lumbar spine surgery, including complex instrumented fusion, although there are relatively few outcome data available. The authors discuss their experience using SA in a modern complex lumbar spine surgery practice to describe its utility and implementation.

          METHODS

          Data from patients receiving SA for lumbar spine surgery by one surgeon from March 2017 to December 2020 were collected via a retrospective chart review. Cases were divided into nonfusion and fusion procedure categories and analyzed for demographics and baseline medical status; pre-, intra-, and postoperative events; hospital course, including Acute Pain Service (APS) consults; and follow-up visit outcome data.

          RESULTS

          A total of 345 consecutive lumbar spine procedures were found, with 343 records complete for analysis, including 181 fusion and 162 nonfusion procedures and spinal levels from T11 through S1. The fusion group was significantly older (mean age 65.9 ± 12.4 vs 59.5 ± 15.4 years, p < 0.001) and had a significantly higher proportion of patients with American Society of Anesthesiologists (ASA) Physical Status Classification class III (p = 0.009) than the nonfusion group. There were no intraoperative conversions to GA, with infrequent need for a second dose of SA preoperatively (2.9%, 10/343) and rare preoperative conversion to GA (0.6%, 2/343) across fusion and nonfusion groups. Rates of complications during hospitalization were comparable to those seen in the literature. The APS was consulted for 2.9% (10/343) of procedures. An algorithm for the integration of SA into a lumbar spine surgery practice, from surgical and anesthetic perspectives, is also offered.

          CONCLUSIONS

          SA is a viable, safe, and effective option for lumbar spine surgery across a wide range of age and health statuses, particularly in older patients and those who want to avoid GA. The authors’ protocol, based in part on the largest set of data currently available describing complex instrumented fusion surgeries of the lumbar spine completed under SA, presents guidance and best practices to integrate SA into contemporary lumbar spine practices.

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          Predictors of cognitive dysfunction after major noncardiac surgery.

          Terri Monk, B Craig Weldon, Cyndi Garvan … (2008)
          The authors designed a prospective longitudinal study to investigate the hypothesis that advancing age is a risk factor for postoperative cognitive dysfunction (POCD) after major noncardiac surgery and the impact of POCD on mortality in the first year after surgery. One thousand sixty-four patients aged 18 yr or older completed neuropsychological tests before surgery, at hospital discharge, and 3 months after surgery. Patients were categorized as young (18-39 yr), middle-aged (40-59 yr), or elderly (60 yr or older). At 1 yr after surgery, patients were contacted to determine their survival status. At hospital discharge, POCD was present in 117 (36.6%) young, 112 (30.4%) middle-aged, and 138 (41.4%) elderly patients. There was a significant difference between all age groups and the age-matched control subjects (P < 0.001). At 3 months after surgery, POCD was present in 16 (5.7%) young, 19 (5.6%) middle-aged, and 39 (12.7%) elderly patients. At this time point, the prevalence of cognitive dysfunction was similar between age-matched controls and young and middle-aged patients but significantly higher in elderly patients compared to elderly control subjects (P < 0.001). The independent risk factors for POCD at 3 months after surgery were increasing age, lower educational level, a history of previous cerebral vascular accident with no residual impairment, and POCD at hospital discharge. Patients with POCD at hospital discharge were more likely to die in the first 3 months after surgery (P = 0.02). Likewise, patients who had POCD at both hospital discharge and 3 months after surgery were more likely to die in the first year after surgery (P = 0.02). Cognitive dysfunction is common in adult patients of all ages at hospital discharge after major noncardiac surgery, but only the elderly (aged 60 yr or older) are at significant risk for long-term cognitive problems. Patients with POCD are at an increased risk of death in the first year after surgery.
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            Trends, major medical complications, and charges associated with surgery for lumbar spinal stenosis in older adults.

            Richard A Deyo (2010)
            In recent decades, the fastest growth in lumbar surgery occurred in older patients with spinal stenosis. Trials indicate that for selected patients, decompressive surgery offers an advantage over nonoperative treatment, but surgeons often recommend more invasive fusion procedures. Comorbidity is common in older patients, so benefits and risks must be carefully weighed in the choice of surgical procedure. To examine trends in use of different types of stenosis operations and the association of complications and resource use with surgical complexity. Retrospective cohort analysis of Medicare claims for 2002-2007, focusing on 2007 to assess complications and resource use in US hospitals. Operations for Medicare recipients undergoing surgery for lumbar stenosis (n = 32,152 in the first 11 months of 2007) were grouped into 3 gradations of invasiveness: decompression alone, simple fusion (1 or 2 disk levels, single surgical approach), or complex fusion (more than 2 disk levels or combined anterior and posterior approach). Rates of the 3 types of surgery, major complications, postoperative mortality, and resource use. Overall, surgical rates declined slightly from 2002-2007, but the rate of complex fusion procedures increased 15-fold, from 1.3 to 19.9 per 100,000 beneficiaries. Life-threatening complications increased with increasing surgical invasiveness, from 2.3% among patients having decompression alone to 5.6% among those having complex fusions. After adjustment for age, comorbidity, previous spine surgery, and other features, the odds ratio (OR) of life-threatening complications for complex fusion compared with decompression alone was 2.95 (95% confidence interval [CI], 2.50-3.49). A similar pattern was observed for rehospitalization within 30 days, which occurred for 7.8% of patients undergoing decompression and 13.0% having a complex fusion (adjusted OR, 1.94; 95% CI, 1.74-2.17). Adjusted mean hospital charges for complex fusion procedures were US $80,888 compared with US $23,724 for decompression alone. Among Medicare recipients, between 2002 and 2007, the frequency of complex fusion procedures for spinal stenosis increased while the frequency of decompression surgery and simple fusions decreased. In 2007, compared with decompression, simple fusion and complex fusion were associated with increased risk of major complications, 30-day mortality, and resource use.
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              Postoperative Cognitive Dysfunction and Noncardiac Surgery

              Lisbeth A. Evered, Brendan S Silbert (2018)
              Postoperative cognitive dysfunction (POCD) is an objectively measured decline in cognition postoperatively compared with preoperative function. POCD has been considered in the anesthetic and surgical literature in isolation of cognitive decline which is common in the elderly within the community and where it is labeled as mild cognitive impairment, neurocognitive disorder, or dementia. This narrative review seeks to place POCD in the broad context of cognitive decline in the general population. Cognitive change after anesthesia and surgery was described over 100 years ago, initially as delirium and dementia. The term POCD was applied in the 1980s to refer to cognitive decline assessed purely on the basis of a change in neuropsychological test results, but the construct has been the subject of great heterogeneity. The cause of POCD remains unknown. Increasing age, baseline cognitive impairment, and fewer years of education are consistently associated with POCD.In geriatric medicine, cognitive disorders defined and classified as mild cognitive impairment, neurocognitive disorder, and dementia have definitive clinical features. To identify the clinical impact of cognitive impairment associated with the perioperative period, POCD has recently been redefined in terms of these geriatric medicine constructs so that the short-, medium-, and long-term clinical and functional impact can be elucidated. As the aging population present in ever increasing numbers for surgery, many individuals with overt or subclinical dementia require anesthesia. Anesthesiologists must be equipped to understand and manage these patients.
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                Author and article information

                Journal
                Title: Journal of Neurosurgery: Spine
                Publisher: Journal of Neurosurgery Publishing Group (JNSPG)
                ISSN (Print): 1547-5654
                Publication date Created: April 01 2022
                Publication date (Print): April 01 2022
                Volume: 36
                Issue: 4
                Pages: 534-541
                Affiliations
                [1 ]Department of Neurosurgery, Tufts Medical Center, Boston;
                [2 ]Department of Neurosurgery, Tufts University School of Medicine, Boston; and
                [3 ]Department of Anesthesiology, Tufts Medical Center, Boston, Massachusetts
                Article
                DOI: 10.3171/2021.7.SPINE21847
                PubMed ID: 34740182
                SO-VID: e890538b-7016-404d-b036-460f93669744
                Copyright © © 2022
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