Laminectomy Patients Research Articles

Percutaneous image-guided lumbar decompression and outpatient laminectomy for the treatment of lumbar spinal stenosis: a 2-year Medicare claims benchmark study

BackgroundThis prospective longitudinal study compares outcomes for Medicare beneficiaries receiving outpatient percutaneous image-guided lumbar decompression (PILD) using the mild® procedure to patients undergoing outpatient laminectomy. All patients were diagnosed with lumbar spinal stenosis (LSS) with neurogenic claudication (NC). MethodsAll medical claims for 100 % of Medicare beneficiaries were reviewed, with study subjects identified using Centers for Medicare and Medicaid Research Identifiable Files. Baseline data were extracted individually to allow for longitudinal analysis through two-year follow-up. The index procedure was defined as the first mild or outpatient laminectomy during the enrollment period. The rate of subsequent surgical procedures and incidence of harms were used as study outcomes. ResultsCohorts included 2197 mild and 7416 laminectomy patients. mild patients were significantly older (76.7 years versus 73.4 years, respectively; p < 0.0001), and 57.4 % of mild were female, compared to 43.3 % of laminectomy (p < 0.0001). mild patients presented with significantly more baseline comorbidities compared to laminectomy patients (mean of 5.7 versus 4.8, respectively; p < 0.0001). Subsequent surgical procedure rate of 9.0 % for mild was significantly higher than 5.5 % for laminectomy (p < 0.0001). mild experienced harms at a significantly lower rate than laminectomy (1.9 % versus 5.8 %, respectively; p < 0.0001). The composite rate of subsequent surgical procedures and harms was similar between groups at 10.8 % for mild and 11.0 % for laminectomy. Conclusionsmild can be considered a viable option for treatment of LSS with NC as evidenced by real-world data in this study. At two-years, mild patients experienced fewer harms and underwent more subsequent surgical procedures than laminectomy patients. The higher rate of subsequent surgical procedures for mild may be attributable to its position earlier in the LSS treatment algorithm. The overall rate of harms and subsequent surgical procedures was similar between groups, suggesting that mild should be considered as a treatment option, particularly for older patients with multiple comorbidities.

Pre-operative magnetic resonance imaging as a predictor of success in lumbar disc herniation patients undergoing laminectomy

Introduction. Lumbar disc herniation is a condition in which annulus fibrosus in the lumbar area is herniated with numerous etiologies, such as degenerative. One of the mainstay treatment for lumbar disc herniation is decompressive laminectomy. Magnetic Resonance Imaging (MRI) with the diagnostic accuracy of 97% also has an excellent resolution for soft tissue. The aim of this study is whether pre-operative MRI may be a predictor of successful clinical outcome in lumbar disc herniation patients undergoing laminectomy surgery. Methods. In this cross-sectional study, we consecutively collected all patients in Radiology Department “Prof. Dr. IGNG Ngoerah” Hospital, Denpasar Bali between January 2021 to December 2022. We enrolled patients with older than 18 years old who had undergone pre-operative lumbosacral MRI and had laminectomy surgery within the sampling time period. The following variables were recorded from each patient: age, gender, Body mass index (BMI), history of diabetes mellitus, hypertension, number of herniated discs, herniation grade, spinal canal stenosis grade, neural foramen stenosis grade, lateral recess stenosis grade, annular tear, disc degeneration, facet disc degeneration, thickening of ligamentum flavum, modic changes, cerebrospinal liquor obstruction, and clinical outcome. Outcomes. We collected 30 patients who underwent laminectomy surgery and had their pre-operative MRI. Patients’ mean age ± SD was 57.7±10.9 years old with 20 male (66.7%) and 10 female (33.3%). There was no significant association between gender, hypertension, diabetes mellitus, body mass index, number of disc herniation, spinal canal stenosis, lateral recess stenosis, neural foramen stenosis, disc degeneration, facet joint degeneration, ligamentum flavum hypertrophy, Modic changes and cerebrospinal liquor obstruction with clinical outcome post laminectomy patients. Conclusion. Pre-operative MRI can reliably diagnose lumbar disc herniation but are not a predictive tool in assessing the clinical outcome of post-laminectomy patients. Laminectomy has an excellent management value for lumbar disc herniation patients especially in reducing the pain, and for them to have better quality of life.

Progression to fusion after lumbar laminectomy for degenerative lumbar spondylolisthesis: Rate and risk-factors. A national database study

ObjectiveLumbar laminectomy is often utilized in the treatment of degenerative lumbar spondylolisthesis. Risk factors that contribute to reoperation rates, in particular to progression to fusion, are poorly understood. We aimed to identify rate and risk factors of lumbar fusion surgery following lumbar laminectomy for the treatment of degenerative lumbar spinal spondylolisthesis. MethodsOur sample was obtained from the national MarketScan Commercial Claims and Encounters Database. We reviewed patients undergoing lumbar laminectomy for stable degenerative lumbar spondylolisthesis (Grade-1) at one or two levels between January 2007 and December 2016. ResultsA total of 33,681 patients were included. By 2 years after the index operation, 2.48 % of patients had required lumbar fusion surgery. Female sex was associated with lower odds (OR 0.8, 95 %CI 0.7–0.9) of reoperation for fusion. Diabetes (OR 1.2, 95 %CI 1.1–1.4), rheumatoid arthritis (OR 1.5, 95 %CI 1.2–1.7) and clinical presentation with LBP (OR 2.1, 95 %CI 1.6–2.9), lower extremity weakness (OR 1.4, 95 %CI 1.1–1.5), as well as occurrence of a postoperative neurological complications (OR 2.0, 95 %CI 1.1–3.4) increased the odds ratio for requiring fusion surgery within two years after lumbar laminectomy. ConclusionIn this large cross-sectional sample of a national claims database consisting of lumbar laminectomy patients for the treatment of spondylolisthesis, approximately 2.5 % required subsequent lumbar fusion. Several modifiable risk factors for fusion progression were identified, which may guide clinicians in shared decision-making and to help identify patients with elevated post-operative risk providing potential leverage point for prevention.

Postoperative Mobilization Protocol in Lumbar Laminectomy Patients.

There are often misconceptions associated with early mobilization in postoperative spine surgery patients related to initiating mobility and staff responsibilities. Nursing staff and nursing certified technicians are responsible for ambulating patients after lumbar laminectomy surgery, resulting in improvement in clinical outcomes (Rupich et al., 2018). Lack of early mobilization in postoperative lumbar laminectomy patients may result in complications such as hospital-acquired weakness, infection, and increased length of hospital stay (Fiasconaro et al., 2020). The purpose of this quality improvement (QI) project was to increase mobilization at 24 and 48 hours in postoperative lumbar laminectomy patients as evidenced by improved electronic medical record (EMR) documentation. The Plan-Do-Check-Act (PDCA) model was used to frame the project, which took place on a neurological focused care unit in a Midwest tertiary care center. A retrospective chart audit indicated that documentation of mobility in the postoperative lumbar laminectomy patients was lacking. Staff education, using a self-paced module, was initiated related to the benefits of mobility in postoperative lumbar laminectomy patients and the importance of documentation in the EMR. The use of the John Hopkins Highest Level of Mobility scale and 6-clicks scale was discussed. A secondary chart review over 4 weeks posteducation showed results of improved documentation of early mobilized patients. This QI project demonstrated the impact of staff education on promoting mobility and appropriate documentation in the postoperative laminectomy patient. Future retrospective chart reviews will be undertaken to determine the effectiveness of a one-time education workshop on the impact of early ambulation over time.

Lumbar Synovial Cysts-Should You Fuse or Not?

Spinal synovial cysts are lesions that most commonly occur in the lumbar region. The need for an instrumented spinal fusion in addition to lumbar decompression with removal of the synovial cyst is unknown. To test the hypothesis that select patients who underwent decompression with instrumented fusion for lumbar synovial cysts would be less likely to have subsequent surgery (SS) in a 2-year period than patients treated with laminectomy alone. This retrospective cohort study was performed using IBM MarketScan Commercial Claims and Encounters Database. Patients who had a lumbar synovial cyst diagnosis and laminectomy surgery with or without fusion surgery were included in this study. Patients were tracked for SS 2 years after surgery. Laminectomy patients were propensity score-matched to laminectomy with fusion (LF) patients using a 2:1 ratio. The log-rank test and Cox regression were used to compare the cumulative incidence of SS between groups. There were 7664 and 1631 patients treated with laminectomy and LF before matching. After matching, there were 2212 laminectomy and 1631 LF patients and patient characteristics were balanced. The 2-year incidence of recurrent SS was 3.1% ([CI]: 2.2%, 4.0%) and 1.7% (95% CI: 0.9%, 2.5%) laminectomy and LF, respectively. Compared with laminectomy, LF had a statistically significant lower risk of recurrent SS (hazard ratio: 0.56 [95% CI: 0.32-0.97]; P -value: .04). All patients who had concomitant lumbar fusion showed decreased chance of having a cyst- or noncyst-related recurrence SS when compared with all patients undergoing laminectomy alone, regardless of diagnosis at the time of SS.

A retrospective analysis of surgical, patient, and clinical characteristics associated with length of stay following elective lumbar spine surgery

BackgroundElective spine surgeries consume significant hospital resources, contributing greatly to the costs of care. Length of stay (LOS) is the major cost driver for most hospitals. This study aimed to describe the demographic, clinical, operative, and postoperative characteristics of patients undergoing elective lumbar spine with wide-ranging rural discharge destinations, and how these characteristics are independently associated with LOS. MethodsThis was a retrospective cohort study of patients at a quaternary institution undergoing surgery for single or two level lumbar degenerative conditions over a two year period. LOS was calculated as the number of days from the date of surgery to the date of discharge. A multiple quasi-Poisson regression was used to describe the characteristics independently associated with LOS. Surgery group was stratified when feasible to explore heterogeneity within the study population. ResultsA total of 473 patients met inclusion criteria. The median LOS was 3.0 days (Interquartile range (IQR) = 1–4) for the entire population, 4.0 days (IQR = 3–6) for 1-level transforaminal lumbar interbody fusion (TLIF) patients, 0 days (IQR = 0–1) for discectomy patients, and 2.0 days (IQR = 1–4) for laminectomy patients. Factors that were statistically significantly associated with LOS in adjusted analyses were age, BMI, preoperative antidepressant use, surgery group, long-acting intraoperative analgesics, operating surgeon, and postoperative blood transfusion. Stratified multivariable analysis showed effect modification by surgery group. ConclusionLOS following elective lumbar spine surgery for degenerative conditions is associated with several patient, clinical, and surgical factors and is highly dependent on the type of surgical procedure performed. Building predictive models for anticipated LOS can help hospitals plan for ideal resource use and scheduling.

A Proposed Personalized Spine Care Protocol (SpineScreen) to Treat Visualized Pain Generators: An Illustrative Study Comparing Clinical Outcomes and Postoperative Reoperations between Targeted Endoscopic Lumbar Decompression Surgery, Minimally Invasive TLIF and Open Laminectomy.

Background: Endoscopically visualized spine surgery has become an essential tool that aids in identifying and treating anatomical spine pathologies that are not well demonstrated by traditional advanced imaging, including MRI. These pathologies may be visualized during endoscopic lumbar decompression (ELD) and categorized into primary pain generators (PPG). Identifying these PPGs provides crucial information for a successful outcome with ELD and forms the basis for our proposed personalized spine care protocol (SpineScreen). Methods: a prospective study of 412 patients from 7 endoscopic practices consisting of 207 (50.2%) males and 205 (49.8%) females with an average age of 63.67 years and an average follow-up of 69.27 months was performed to compare the durability of targeted ELD based on validated primary pain generators versus image-based open lumbar laminectomy, and minimally invasive lumbar transforaminal interbody fusion (TLIF) using Kaplan-Meier median survival calculations. The serial time was determined as the interval between index surgery and when patients were censored for additional interventional and surgical treatments for low back-related symptoms. A control group was recruited from patients referred for a surgical consultation but declined interventional and surgical treatment and continued on medical care. Control group patients were censored when they crossed over into any surgical or interventional treatment group. Results: of the 412 study patients, 206 underwent ELD (50.0%), 61 laminectomy (14.8%), and 78 (18.9%) TLIF. There were 67 patients in the control group (16.3% of 412 patients). The most common surgical levels were L4/5 (41.3%), L5/S1 (25.0%), and L4-S1 (16.3%). At two-year f/u, excellent and good Macnab outcomes were reported by 346 of the 412 study patients (84.0%). The VAS leg pain score reduction was 4.250 ± 1.691 (p < 0.001). No other treatment during the available follow-up was required in 60.7% (125/206) of the ELD, 39.9% (31/78) of the TLIF, and 19.7% (12/61 of the laminectomy patients. In control patients, only 15 of the 67 (22.4%) control patients continued with conservative care until final follow-up, all of which had fair and poor functional Macnab outcomes. In patients with Excellent Macnab outcomes, the median durability was 62 months in ELD, 43 in TLIF, and 31 months in laminectomy patients (p < 0.001). The overall survival time in control patients was eight months with a standard error of 0.942, a lower boundary of 6.154, and an upper boundary of 9.846 months. In patients with excellent Macnab outcomes, the median durability was 62 months in ELD, 43 in TLIF, and 31 months in laminectomy patients versus control patients at seven months (p < 0.001). The most common new-onset symptom for censoring was dysesthesia ELD (9.4%; 20/206), axial back pain in TLIF (25.6%;20/78), and recurrent pain in laminectomy (65.6%; 40/61) patients (p < 0.001). Transforaminal epidural steroid injections were tried in 11.7% (24/206) of ELD, 23.1% (18/78) of TLIF, and 36.1% (22/61) of the laminectomy patients. The secondary fusion rate among ELD patients was 8.8% (18/206). Among TLIF patients, the most common additional treatments were revision fusion (19.2%; 15/78) and multilevel rhizotomy (10.3%; 8/78). Common follow-up procedures in laminectomy patients included revision laminectomy (16.4%; 10/61), revision ELD (11.5%; 7/61), and multilevel rhizotomy (11.5%; 7/61). Control patients crossed over into ELD (13.4%), TLIF (13.4%), laminectomy (10.4%) and interventional treatment (40.3%) arms at high rates. Most control patients treated with spinal injections (55.5%) had excellent and good functional outcomes versus 40.7% with fair and poor (3.7%), respectively. The control patients (93.3%) who remained in medical management without surgery or interventional care (14/67) had the worst functional outcomes and were rated as fair and poor. Conclusions: clinical outcomes were more favorable with lumbar surgeries than with non-surgical control groups. Of the control patients, the crossover rate into interventional and surgical care was 40.3% and 37.2%, respectively. There are longer symptom-free intervals after targeted ELD than with TLIF or laminectomy. Additional intervention and surgical treatments are more often needed to manage new-onset postoperative symptoms in TLIF- and laminectomy compared to ELD patients. Few ELD patients will require fusion in the future. Considering the rising cost of surgical spine care, we offer SpineScreen as a simplified and less costly alternative to traditional image-based care models by focusing on primary pain generators rather than image-based criteria derived from the preoperative lumbar MRI scan.

Differential Agnostic Effect Size Analysis of Lumbar Stenosis Surgeries.

A meta-analysis of 89 randomized prospective, prospective, and retrospective studies on spinal endoscopic surgery outcomes. The study aimed to provide familiar Oswestry Disability Index (ODI), visual analog scale (VAS) back, and VAS leg effect size (ES) data following endoscopic decompression for sciatica-type back and leg pain due to lumbar herniated disc, foraminal, or lateral recess spinal stenosis. Higher-grade objective clinical outcome ES data are more suitable than lower-grade clinical evidence, including cross-sectional retrospective study outcomes or expert opinion to underpin the ongoing debate on whether or not to replace some of the traditional open and with other forms of minimally invasive spinal decompression surgeries such as the endoscopic technique. A systematic search of PubMed, Embase, Web of Science, and the Cochrane Central Register of Controlled Trials from 1 January 2000 to 31 December 2019 identified 89 eligible studies on lumbar endoscopic decompression surgery enrolling 23,290 patient samples using the ODI and VAS for back and leg pain used for the ES calculation. There was an overall mean overall reduction of ODI of 46.25 (SD 6.10), VAS back decrease of 3.29 (SD 0.65), and VAS leg reduction of 5.77 (SD 0.66), respectively. Reference tables of familiar ODI, VAS back, and VAS leg show no significant impact of study design, follow-up, or patients' age on ES observed with these outcome instruments. There was no correlation of ES with long-term follow-up (P = 0.091). Spinal endoscopy produced an overall ODI ES of 0.92 extrapolated from 81 studies totaling 12,710 patient samples. Provided study comparisons to tubular retractor microdiscectomy and open laminectomy showed an ODI ES of 0.9 (2895 patients pooled from 16 studies) and 0.93 (1188 patients pooled from 5 studies). The corresponding VAS leg ES were 0.92 (12,631 endoscopy patients pooled from 81 studies), 0.92 (2348 microdiscectomy patients pooled from 15 studies), and 0.89 (1188 open laminectomy patients pooled from 5 studies). Successful clinical outcomes can be achieved with various lumbar surgeries. ESs with endoscopic spinal surgery are on par with those found with open laminectomy and microsurgical decompression. This article is a meta-analysis on the benefit overlap between lumbar endoscopy, microsurgical decompression, laminectomy, and lumbar decompression fusion.

Accelerometry Data Delineate Phases of Recovery and Supplement Patient-Reported Outcome Measures Following Lumbar Laminectomy

Patient-reported outcome measures (PROMs) are traditionally used to track recovery of patients after spine surgery. Wearable accelerometers have adjunctive value because of the continuous, granular, and objective data they provide. We conducted a prospective study of lumbar laminectomy patients to determine if time-series data from wearable accelerometers could delineate phases of recovery and compare accelerometry data to PROMs during recovery tracking. Patients with lumbar stenosis for whom lumbar laminectomy was indicated were prospectively recruited. Subjects wore accelerometers that recorded their daily step counts from at least 1 week preoperatively to 6 months postoperatively. Subjects completed the Oswestry Disability Index and the 12-Item Short Form Health Survey preoperatively and at 2 weeks, 1 month, 3 months, and 6 months postoperatively. Daily aggregate median steps and individual visit-specific median steps were calculated. The Pruned Linear Exact Time method was used to segment aggregate median steps into distinct phases. Associations between visit-specific median steps and PROMs were identified using Spearman rank correlation. Segmentation analysis revealed 3 distinct postoperative phases: step counts rapidly increased for the first 40 days postoperatively (acute healing), then gained more slowly for the next 90 days (recovery), and finally plateaued at preoperative levels (stabilization). Visit-specific median steps were significantly correlated with PROMs throughout the postoperative period. PROMs significantly exceeded baseline at 6 months postoperatively, while step counts did not (all P < 0.05). Continuous data from accelerometers allowed for identification of 3 distinct stages of postoperative recovery after lumbar laminectomy. PROMs remain necessary to capture subjective elements of recovery.

The Impact of Surgical Scheduling on Outcomes in Lumbar Laminectomy.

ObjectiveThe purpose of this study was to determine whether surgical scheduling affected patient outcomes following lumbar laminectomy. Physician fatigue caused by prolonged work hours has been shown to worsen outcomes. Previous research has also established a relationship between surgical scheduling and outcomes.MethodsThis was a retrospective chart review of single-level lumbar laminectomy patients at the Penn State Milton S. Hershey Medical Center between 1992 and 2019. Patients who underwent a one-level laminectomy between 1992 and 2019 were included in the study. Patients with procedures defined as complex (>1 level, tumor or abscess removal, discectomy, implant removal) were excluded. The surgical complication rate [cerebrospinal fluid (CSF) leak, 30-day redo, 30-day ED visit, weakness, sensation loss, infection, urinary retention] was compared across surgical start times, day of the week, proximity to a holiday, and procedure length.ResultsProcedures that started between 9:01-11:00 were more likely to have a complication than those between 7:01-9:00 (p=0.04). For every 60-min increase in surgery length, odds of having a complication increased by 2.01 times (p=0.0041). Surgeries that started between 11:01-13:00 had a significantly longer median surgery length than those between 7:01-9:00.ConclusionThe time of the day when the procedure was started was predictive of worse outcomes following laminectomy. This may be attributed to several factors, including fatigue and staff turnover. Additionally, increased surgical length was predictive of more complications. It remains unclear whether increased surgical time results from correction of noticed errors or a fatigue-related decline in speed and performance. These findings on one-level laminectomy warrant further investigations since they have implications for reducing systemic failures that impact patient outcomes.

Enhanced Recovery After Surgery Protocol for Lumbar Spinal Surgery With Regional Anesthesia: A Retrospective Review.

BackgroundIn the USA, spinal fusion surgery incurs the highest hospital cost. Despite the recent advances in the application of enhanced recovery after surgery (ERAS) protocols in these surgeries, the efficacy of these protocols in improving the perioperative outcomes remains unclear. We conducted a retrospective review as a quality improvement (QI) project to analyze the efficacy of the ERAS protocol with intraoperative modified thoracolumbar interfascial plane (mTLIP) block to determine whether these interventions reduce the length of stay (LOS) and opioid requirements during the postoperative period.MethodsRetrospective reviews of adult patients (>18 yrs) who underwent elective lumbar spinal fusion or laminectomy at our institute were reviewed. Patients were administered oral gabapentin and acetaminophen preoperatively. Prior to incision, an mTLIP block was performed using liposomal bupivacaine. Intraoperatively, ketamine, ketorolac, and tranexamic acid were administered. Postoperative, pain control was treated with scheduled acetaminophen, ketorolac, and low-dose ketamine infusion. Hydromorphone and oxycodone were administered for breakthrough pain. Patients who underwent a similar procedure without ERAS protocol were chosen as controls to assess the efficacy of ERAS protocol. Data pertaining to patient demographics, operative and perioperative use of analgesics, LOS, 90-day readmissions, and morbidity were collected. Patients who underwent laminectomy and spinal fusion surgery were analyzed separatelyResultsA total of 65 patients were identified; laminectomy (n- 24), spinal fusion surgery (n-41). In the laminectomy patients, treatment group (n-12) and the control group (n-12). Treatment group receiving the ERAS protocol with the regional anesthesia via the mTLIP (n= 12) opioid requirement was reduced by 51.42% [P = 0.03], and LOS was reduced by 2.04 days [P = 0.01] [0.75 days vs. 2.79 days]). In the spinal fusion patients, treatment group (n-15) and control group (n-26). Treatment group receiving the ERAS protocol with the use of regional anesthesia via the mTLIP group (n= 15), opioid requirement was reduced by 38.33% [P = 0.04]. No difference in LOS was observed at 5.4 days vs. 4.88 days (P = 0.28).ConclusionERAS protocol in patients undergoing lumbar spinal surgery incorporated the use of regional anesthesia via the mTLIP block, we observed there is a statistically significant reduction in the LOS for lumbar laminectomy and a significant reduction in opioid administration for lumbar laminectomies and spinal fusion surgery.

211. Patient, surgery, and hospital-related risk factors for hospital acquired conditions following common spinal procedures during inpatient stays

<h3>BACKGROUND CONTEXT</h3> A total of 48,771 hospital-acquired conditions (HACs) have been reported in United States hospitals. These incidents resulted in excess costs of more than $2 billion, which translated to roughly $40,000 per patient per HAC. Along with this direct fiscal burden, enduring an HAC added on average 8.17 days to each patient's hospital stay, which can lead to indirect hidden costs. <h3>PURPOSE</h3> To critically analyze the classical and novel risk factors of HACs following the most prevalent inpatient spine procedures; spinal fusion (463,200 cases/year) and laminectomy (438,200 cases/year). <h3>STUDY DESIGN/SETTING</h3> Systematic review of observational cohort studies. <h3>PATIENT SAMPLE</h3> This study included 6,382 patients who underwent spine fusion or laminectomy. <h3>OUTCOME MEASURES</h3> Patient-, surgical-, hospital-, related risk factors and genetic associations. <h3>METHODS</h3> Several online databases were searched. Using illustrated figures and diagrams, we aim to provide spine surgeons with the knowledge and evidence about the economic impact, patient-, surgery-, and hospital-related risk factors of HACs. Additionally, we present the novel risk factors such as genetic biomarkers. <h3>RESULTS</h3> Patients undergoing fusion and laminectomy experience HACs at rates of 1.4% and 6.5%, respectively. The incidence of HACs most commonly comprises falls and trauma (87%) and SSIs (11%) for thoracolumbar fusion patients, while laminectomy patients experience venous thromboembolism (VTE) (1.4%) and surgical site infection (SSI) (0.2%) most frequently. Increased age is correlated with higher incidence of HACs. Complication rates in those over 65 are as high as 13.46% with wound complications (1.2%-1.69% of cases) and deep vein thrombosis (DVT) (2.1-2.2%) occurring at rates greater than that of those under 65. BMI less than 40 is associated with increased risk of VTE events and SSI, whereas those over 40 have higher risk of urinary tract infection (UTI). Patients who have had previous spinal surgery have a strong risk of developing wound complications (4.6% vs 1.0% among those without prior surgery). Insulin-dependent diabetes (OR=1.72) may increase the rate of complications and deep SSI following thoracolumbar spinal surgery (p=0.050). Steroid use (OR=1.55) may increase a patient's likelihood of complication. Patients with a preoperative psychiatric disorder are at greater risk of a surgical complication. Regarding hospital-related factors, increased operative time is associated with greater risk of HACs. In patients over the age of 75, the length of operation time (p=0.003) is a contributing factor to wound complications. Moreover, teaching hospitals and those with larger bed sizes may be associated with increased risk for HACs. Lastly, weekend admissions are associated with a 45.3% HAC incidence rate compared to a 4.59% rate in weekday admissions. However, higher surgeon volume is associated with lower complications. The pre-admission testing for novel genetic biomarkers of HACs could stratify the risk of HACs for patients. Patients with higher concentrations of miR-582, miR-195, miR- 532, nitric oxide synthase 3 polymorphism are at higher risk to develop VTE. <h3>CONCLUSIONS</h3> Identifying patient-, surgery-, and hospital- related risk factors in the setting of fusion and laminectomy is crucial to providing patients with optimal care and avoiding the penalties of HACs. <h3>FDA DEVICE/DRUG STATUS</h3> This abstract does not discuss or include any applicable devices or drugs.

Laminectomy versus Unilateral Hemilaminectomy for the Removal of Intraspinal Schwannoma: Experience of a Single Institution and Review of Literature.

Spinal schwannomas are benign slow-growing tumors, and gross total resection is the gold standard of treatment. The conventional surgical approach is laminectomy, which provides a wide working area. Today minimally invasive surgery (MIS) is popular because it is associated with shorter hospital stay, less operative blood loss, minimized tissue traumas and relative postoperative pain, and, and spine surgery, avoidance of spinal instability. From January 2016 to December 2019, we operated on 40 patients with spinal intradural extramedullary tumor (schwannoma) with laminectomy or hemilaminectomy. Baseline medical data, including patients' sex and age, tumor location, days of postoperative bed rest, operative time, length of hospitalization, and 1-month visual analog scale (VAS) value were collected and analyzed. Data analysis was performed using STATA/IC 13.1 statistical package (StataCorp LP, College Station, Texas, United States). Hemilaminectomy was associated with faster operative time (p < 0.001), shorter postoperative time spent in bed (p < 0.001), and shorter hospitalization (p < 0.001). At 1-month follow-up, the mean VAS score was 4.6 (1.7) among the laminectomy patients and 2.5 (1.3) among the hemilaminectomy patients (p < 0.001). Postoperative complications occurred in 1 (7.7%) and 7 (25.9%) patients in the hemilaminectomy and laminectomy groups, respectively (p = 0.177). Unilateral hemilaminectomy has significant advantages compared with laminectomy in spinal schwannoma surgery including shorter operative time, less time spent in bed, shorter hospitalization, and less postoperative pain.

889. Improving patient compliance with preoperative universal decolonization to reduce surgical infection rate and costs

BackgroundIn order to address spine patient non-compliance with preoperative nasal decolonization, a trial was undertaken to replace nasal povidone iodine (PVI) with alcohol based nasal antiseptic paired with chlorhexidine (CHG) bathing for all spine fusion and laminectomy patients for a period of three months.MethodsIn addition to preoperative CHG bathing already in place, an alcohol based nasal antiseptic was applied to the nose of all spine surgery fusion and laminectomy patients within one hour of surgery instead of the PVI nasal antiseptic that had been in use previously.ResultsAfter switching the alcohol based nasal antiseptic, there was a reduction in surgical site infections (SSI) of 64% from 0.58 to 0.21/100 spine fusion procedures and a reduction in SSI of 100% from 0.46 to 0.00/100 laminectomy procedures. This represents an estimated cost avoidance of $127K associated with infections prevented. There was also a $37K cost savings resulting from switching from nasal PVI to alcohol based nasal antiseptic, with patients reporting greater satisfaction.ConclusionUniversal preoperative decolonization for spine fusion and laminectomy patients using an alcohol based nasal antiseptic and CHG bathing resulted in reduced infection rates and associated costs, reduced nasal antiseptic cost and improved patient satisfaction.Disclosures All Authors: No reported disclosures

P49. Physical activity measures in lumbar laminectomy patients: a prospective comparison of fitness tracker measures versus patient-reported outcome measures

BACKGROUND CONTEXT Assessing spine surgery patients' disability and mobility levels allows clinicians to evaluate the efficacy of surgical procedures and track postoperative recovery. While the current standard, patient-reported outcome measures (PROMs), provides a cross-sectional subjective assessment of functional levels, wearable fitness trackers can continuously and objectively track physical activity even outside of the clinic. PURPOSE The present study aims to assess how a wearable fitness tracker and two PROMs compare in tracking patients' recoveries from lumbar laminectomy. STUDY DESIGN/SETTING This is a prospective observational clinical study conducted within an urban academic health system. PATIENT SAMPLE The sample is composed of patients with lumbar stenosis who have undergone non-revision lumbar laminectomy with or without single level fusion. Patients who have had spine surgery within the past 5 years or have medical conditions that significantly inhibit mobility (including cardiovascular conditions and other orthopedic conditions) were excluded. OUTCOME MEASURES Patient median steps taken per day were continuously collected using the Fitbit Flex 2 fitness tracker. The Oswestry Disability Index (ODI) and Physical and Mental Components of the 12-Item Short Form Health Survey (SF-12 PCS/MCS) PROMs were assessed using standardized questionnaires throughout the study period. METHODS Each patient was provided with a fitness tracker at least 2 weeks prior to surgery until 6 months postoperatively to record median steps taken per day during the preoperative (baseline) and 2 week, 1, 3, and 6 month postoperative intervals. ODI and SF-12 PCS/MCS scores were calculated at enrollment and at the end of each interval. Two-tailed Student's t-tests were used to evaluate changes from baseline. Associations between the change in median steps per day and PROMs throughout the study were evaluated using Pearson's correlation coefficient. RESULTS Twelve of 18 enrolled subjects have thus far completed the study. Average compliance for wearing the fitness tracker, which was defined as the percentage of days the device was worn relative to the number of days the subject was enrolled in the study, was 91%. Average median steps per day and PROM scores normalized to preoperative levels decline immediately after surgery but recover after 1-3 months. Median steps per day were not significantly different from baseline at 6 months postoperatively (2.45% increase; p = 0.60). Average SF-12 PCS and ODI scores surpassed baseline scores by 1 month postoperatively and improved from baseline by 38% and 45% respectively at 6 months postoperatively (p = 0.004 and 0.05). No significant correlations were found between the change in median steps per day and corresponding change in PROM scores at any study time points. CONCLUSIONS Though enrollment is still ongoing, we can conclude that lumbar laminectomy patients had significantly improved SF-12 PCS and ODI scores by 6 months postoperatively while median steps per day only returned to baseline. Patients therefore perceive that their conditions have improved after lumbar laminectomy more quickly than their mobilities objectively increase. The lack of significant correlations between the change in median steps per day and corresponding change in PROM scores throughout the study also suggests that these outcome measurements describe distinct patient experiences. Though patients' self-reported pain-free mobility increases, lifestyle and other factors may be important in explaining the lack of difference between preoperative and 6-month postoperative median steps taken per day. FDA DEVICE/DRUG STATUS This abstract does not discuss or include any applicable devices or drugs.

P47. Trends in pain medication prescriptions and satisfaction scores in spine surgery patients at a single institution

BACKGROUND CONTEXT As the opioid crisis has gained national attention, there has been an increasing effort to decrease opioid usage. Simultaneously, patient satisfaction is a crucial metric in the American health care system, and has been closely linked to effective pain management in surgical patients. PURPOSE Examine rates of pain medication prescription and concurrent patient satisfaction in spine surgery patients. STUDY DESIGN/SETTING Retrospective cohort study. PATIENT SAMPLE A total of 1,729 patients undergoing any spine surgery. OUTCOME MEASURES Rates of non-opioid pain medication prescriptions during hospitalization as part of a multimodal analgesia regimen, morphine milligram equivalents (MME) of opioids used during hospitalization, Press Ganey Satisfaction Survey data. METHODS Patients ≥18yo undergoing spine surgery between 6/25/2017-6/30/2018 at a single institution by spine surgeons performing ≥20 surgeries/quarter and who had medication data during hospitalization available included. Additional data collected included physician and procedure type. All data analyzed by quarter. Chi-squared test to compare percentages and ANOVA to compare means across quarters. Multivariate regression used to compare procedure-specific trends, controlling for age, revision and level of pain. Significance set at p RESULTS A total of 1,759 patients were included, 427 in Quarter 1 (Q1), 439 in Q2, 453 in Q3 and 440 in Q4. Mean total MME per patient hospitalization was 574.46, no significant difference between quarters (p=0.116). Mean MME/day per patient decreased between quarters (p=0.048), with highest mean 91.84 in Q2 and lowest 77.50 in Q4. From Q1 to Q4, three physicians had decreased mean MME/day (75.47→50.92, p=0.023; 115.70→46.05, p=0.013; 92.89→69.53, p=0.42, respectively) and two physicians had decreased total MME (815.88→243.15, p=0.004; 706.79→451.72, p=0.014, respectively). MME/day decreased (74.78→52.37, p=0.046) for discectomy cases. Controlling for age, revision and level of pain, total MME decreased for discectomies (p=0.006). Among all procedures, acetaminophen, NSAID and steroid prescription rates increased (9.13%→17.05%, p=0.001; 6.32%→9.77%, p=0.048; 9.13%→17.05%, p=0.001, respectively). This was also the case in fusion patients specifically (9.09%→17.99%, p=0.002; 2.77%→5.76%, p=0.024; 9.09%→17.99%, p=0.002, respectively). NSAID prescription in laminectomy patients also increased (3.23%→4.89%, p=0.041). Concurrently, benzodiazepine and GABA analog prescriptions decreased among all procedures (19.20%→10.68%, p CONCLUSIONS Over the studied time period, opioid use decreased and nonopioid prescriptions increased during hospitalization, while satisfaction scores remained unchanged. These findings indicate an increasing effort in reducing opioid use amongst providers, and suggest the ability to do so without impacting overall satisfaction rates. FDA DEVICE/DRUG STATUS This abstract does not discuss or include any applicable devices or drugs.

Cyanoacrylate Dermal Closure in Spine Surgery: Systematic Review and Pooled Analysis.

Study Design:Systematic review.Objectives:Cyanoacrylate glue closure has been utilized for dermal closure in surgical incisions. Its safety and efficacy in spine surgery are not established. The authors perform a systematic review to determine the rate of surgical site infection (SSI), wound dehiscence, and wound erythema with cyanoacrylate dermal closure in spine surgery.Methods:A systematic review adhering to PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) guidelines was performed utilizing the PubMed/MEDLINE, EMBASE, and Cochrane databases on patients undergoing spine surgery with cyanoacrylate dermal closure. Pooled analysis was performed with stratification of patients according to spinal level and the presence/absence of instrumentation. Risk-of-bias and methodological quality was appraised using 17 prespecified criteria.Results:Five articles (1 retrospective cohort study, 4 cases series) with a total of 1282 patients were included. A total of 967 patients, all diagnosed with degenerative spine disease, were suitable for pooled analysis. In 290 patients who underwent anterior cervical discectomy and fusion, and in 23 patients with posterior cervical decompression (without instrumentation), there was 0% rate of SSI, wound dehiscence, and erythema. In 489 patients who underwent lumbar microdiscectomy, there was 0.41% rate of SSI, 0.20% rate of wound dehiscence, and 0.20% rate of wound erythema. In 165 lumbar laminectomy patients, there was a 1.82% rate of SSI, 0.61% rate of wound dehiscence, and 0% rate of wound erythema.Conclusion:Cyanoacrylate dermal closure for the aforementioned procedures is associated with low rates of wound complications (SSI, dehiscence, and erythema). Further studies should be performed, especially in nondegenerative surgery, instrumented thoracic and lumbar spine surgery.

The Effects of the Thai Traditional Medicine of Abdominal Massage on Defecation in Post Lumbar Laminectomy Patients

Objective: This prospective study examined the defecation enhancement effects in post-lumbar laminectomy patients who received Thai traditional medicine of abdominal massage (TTMAM) in combination with standard nursing care, compared with patients receiving only standard nursing care. Methods: This prospective, randomized, controlled trial was conducted at Siriraj Hospital between 2011 and 2015. Eighty-eight patients with spinal stenosis scheduled for lumbar laminectomy with or without fusion were enrolled. The patients were randomly assigned to two groups: the first group underwent standard nursing care combined with TTMAM (the TTMAM group), and the second group underwent standard nursing care (the non-TTMAM group). The clinical outcomes regarding the first defecation within 3 days after surgery, abdominal distension, and patient satisfaction with defecation care were evaluated. Results: When comparing the first defecation within 3 days after surgery, no significant differences were found in the number of patients between the two groups. The number of the patients who had their first defecation within 3 days after surgery was higher in the TTMAM group (46.5%) than the non-TTMAM group (27.3%). There was significantly less abdominal distension on the third day after surgery in the TTMAM group than in the non-TTMAM group. Moreover, the mean score of patient satisfaction of the TTMAM group was higher than that of the non-TTMAM group. Conclusion: Thai traditional medicine of abdominal massage tends to help defecation in post-lumbar laminectomy patients as it relieves abdominal distension and increases satisfaction with defecation care. Therefore, the use of TTMAM with other bowel care methods could provide additional benefit for lumbar laminectomy patients.

Symptomatic cord compression by paraspinal musculature following cervical laminectomy: rare complication.

Cervical laminectomy is an effective treatment for multilevel cervical compressive myelopathy. Symptomatic spinal cord compression (SSCC) by paraspinal musculature (PSM) following cervical laminectomy is rarely reported. The aim of this study was to evaluate the frequency and pathogenesis of this complication after cervical laminectomy. Between 2007 and 2016, the medical records of 1309 cervical laminectomy patients were reviewed. From these 1309 records, seven patients (five men and two women; average age, 64.12years; range 48-78years) with SSCC by PSM following cervical laminectomy were identified. The incidence and possible risk factors of this rare condition were evaluated. The frequency of SSCC by PSM following cervical laminectomy was 0.53%. Presenting symptoms included paralyses and paresthesias, depending on the level and severity of cervical spinal cord compression. The initial onset of neurologic deterioration varied from 12h to 21days after operation. Most patients recovered well after surgical management with an average Barthel index of 74.3 at 6months after surgery. In comparison with 63 controls, this rare complication was associated with preoperative cervical kyphosis, prior antiplatelet therapy, and posterior decompression with prone position. SSCC by PSM is a rare but devastating complication following cervical laminectomy, especially in those patients with preoperative kyphosis, prior antiplatelet treatment, and decompression with prone position. MRI is an ideal tool to identify this complication. Rapid cervical cord decompression and avoidance of recurrent compressive events can achieve a good clinical outcome. These slides can be retrieved under Electronic Supplementary Material.

Functional outcomes of laminectomy and laminotomy for the surgical management lumbar spine stenosis.

This clinical descriptive study aims to establish if differences exist in functional outcomes, to include both leg and lower back pain (LBP) as well as disability, in patients undergoing laminectomy or laminotomy surgery for lumbar spinal stenosis (LSS). We conducted a single centre, prospective study of 119 patients undergoing laminectomy or laminotomy surgery for LSS, from 2006 and 2012. Clinical outcomes for back and leg pain were analyses using Oswestry Disability Index (ODI) questionnaires and visual analogue scale (VAS) scores collected preoperatively, at 6 weeks and 1 year. Further analysis subdivided patients into two groups based on initial LBP VAS scores. Fifty-five percent of patients were females (n=65) and 45% males (n=54), with a mean age of 68.7 years and L4/5 being the level most frequently decompressed. Considering all surgeries, a statistically significant reduction in VAS back pain between pre-op and 6 weeks was seen (4.99 to 3.00, P<0.001). There was a significant (P<0.0001) average reductions in LBP by 1.66 units and leg pain by 3.33 units after 1 year, with minimal difference between laminectomy and laminotomy. In the VAS back ≥5 group, laminectomy patient's pain increased by 0.63 units between 6 weeks and 1 year whilst laminotomy patients experienced a reduction in back pain of 0.51 units (P=0.063). ODI scores significantly improved for laminectomy and laminotomy by an average of 19.1%, 95% CI: 13.4-24.9% and 10.8%, 95% CI: 5.8-15.7%, with no statistically significant difference between groups. No statistically significant differences were demonstrated between laminectomy and laminotomy outcomes, for LBP, leg pain or disability in our institute. On the basis of functional outcomes laminectomy remains a feasible approach in the treatment of lumbar spine stenosis. The data presented in this manuscript provides frequency data for subsequent comparative studies.