Prevalence of lumbar spinal stenosis in general and clinical populations: a systematic review and meta-analysis

Influence of decompression by laminotomy and percutaneous tansforaminal endoscopic surgery on postoperative wound healing, pain intensity, and lumbar function in elderly patients with lumbar spinal stenosis

PURPOSE

To compare the wound healing, pain intensity and lumbar function in elderly patients with lumbar spinal stenosis after laminectomy decompression or percutaneous transforaminal endoscopic surgery.

METHODS

A retrospective study was conducted on 65 patients who underwent laminotomy and 69 patients who underwent percutaneous transforaminal endoscopic spinal decompression surgery. clinical data analysis, including surgical parameters, complications, postoperative wound healing, pain intensity, lumbar function, and correlation analysis, was performed.

RESULTS

The operative time of percutaneous transforaminal endoscopic surgery was significantly shorter than that of laminotomy (70.78±6.80 min vs 128.97±4.70 min, p < 0.001), intraoperative blood loss was significantly reduced (94.22± 7.69ml vs 327.68± 6.44ml, p < 0.001), postoperative wound healing time and time to get out of bed were significantly shortened, pain was reduced by visual analog scale (3.48±1.11 vs 2.80±1.05, p = 0.007), the Japanese Orthopaedic Association (JOA) score was significantly increased, and the Oswestry Disability Index (ODI) score showed significantly decrease. The incidence of urinary tract infection and urinary retention was higher after laminotomy. Correlation analysis showed that operative time, intraoperative blood loss, and time to get out of bed were significantly related to prognosis in elderly patients.

CONCLUSION

Percutaneous transforaminal endoscopic surgery is significantly superior to conventional laminectomy decompression in the treatment of elderly lumbar spinal stenosis.

Neurophysiology of Micturition: a Narrative Review on Preventing Mismanagement

INTRODUCTION

The insidious interrelation between three key factors underscores the critical need to understand the neural control of the lower urinary tract (LUT): the complexity of its functioning, the epidemiology of conditions that can disrupt it, and the nonspecific presentation of related symptoms. This paper examines the importance of understanding neurophysiology of micturition to prevent mismanagement and reduce unnecessary procedures.

MATERIAL AND METHODS

This review focuses on the neurophysiology of the micturition cycle, the epidemiology of major health conditions that affect it, and the nonspecific nature of lower urinary tract symptoms (LUTS) concerning underlying pathologies. The review was conducted in accordance with the guidelines of the Scale for Assessment of Narrative Review Articles (SANRA). Only articles in English were included, while case reports, editorials, and expert opinion pieces were excluded.

RESULTS

The ability of the LUT to store and release urine requires precise coordination and is mediated by a complex network involving the brain, spinal cord, peripheral ganglia, and nerves. Epidemiological data reveal a growing global burden of diseases that impact LUT functioning (LUTF). Moreover, the nonspecific nature of LUTS often leads to diagnostic challenges, and inappropriate treatment strategies.

CONCLUSION

The interplay between the complexity of LUTF, the widespread prevalence of conditions that can disrupt it, and the nonspecific nature of related symptoms frequently complicate urological decision-making. Overlooking associated neurological factors can result in suboptimal outcomes, diminished quality of life, and serious adverse consequences. A systematic approach is crucial to minimizing the risk of misdiagnosis and mismanagement, especially when considering invasive interventions.

Comparing Spinopelvic Angles and Magnification on Supine MRI With Standing Radiographs in Lumbar Spinal Stenosis

STUDY DESIGN

Radiologic cross-sectional study based on a prospective cohort study (level III).

OBJECTIVE

Investigate whether lumbar lordosis (LL) and sacral slope (SS) differ significantly on supine magnetic resonance imaging (MRI) versus standing radiographs in nondeformity lumbar spinal stenosis (LSS). Secondly, to quantify the amount of magnification on standing lumbar radiographs.

SUMMARY OF BACKGROUND DATA

Supine MRI is routinely performed when diagnosing LSS. Standing radiographs are often supplemented to measure spinopelvic angles. Little research has been done on whether LL and SS translate from standing radiographs to supine MRI. Previous studies have trended to significant changes in LL and SS; however, none have been performed exclusively in nondeformity LSS.

MATERIALS AND METHODS

Review of preoperative standing lateral lumbar radiographs and midsagittal T2-weighted supine lumbar MRI in 211 patients with LSS without concomitant degenerative spondylolisthesis, measuring LL (L1-S1), segmental lumbar lordosis (sLL) (L4-S1) and SS, in addition to the anteroposterior diameter and height of the L3 vertebral body. We conducted a reliability study and performed a Pearson's correlation analysis. Data was presented in Bland-Altman plots.

RESULTS

Interobserver reliability was good to excellent, with ICC ranging from 0.77 to 0.94 for all parameters. Statistically significant differences were observed in LL and SS between image modalities. The mean radiographic measurements were as follows: LL 48.9 (SD: 12.8), sLL 32.3 (SD: 8.1), and SS 37.3 (SD: 8.7) degrees. The mean MRI measurements were as follows: LL 46.0 (SD: 10.5), sLL 32.3 (SD: 7.1), and SS 38.1 (SD: 7.1) degrees. Mean vertebral body magnification was between 21% and 23% for L3 anteroposterior diameter and height.

CONCLUSIONS

Our results suggest that supine lumbar MRI might be a viable alternative to standing lateral lumbar radiographs for measuring LL and SS in routine follow-up for patients with LSS without concomitant spinal deformity. Standing radiographs are recommended as part of the initial investigation for LSS. Standing lumbar radiographs may yield high grades of magnification.

Therapy Potential of Oblique Lumbar Interbody Fusion 360 for Severe Lumbar Spinal Stenosis

OBJECTIVES

The advent of O-arm navigation optimized the oblique lumbar interbody fusion (OLIF) procedure, allowing the operator to simultaneously perform OLIF and percutaneous posterior pedicle screw implantation without patient position change, thus improving the fluency and accuracy of the OLIF procedure (called as OLIF360). Nevertheless, a consensus regarding its suitability for patients with severe spinal stenosis remains elusive. This study aims to investigate the clinical efficacy of OLIF360 and its imaging changes in severe lumbar spinal stenosis cases.

METHODS

This retrospective study analyzed clinical data from 63 patients with severe lumbar spinal stenosis. Fourteen patients were treated with OLIF360, and another 37 patients were treated with posterior lumbar interbody fusion (PLIF). Lumbar spinal stenosis was assessed using the modified Schizas classification. Clinical efficacy scale scores and postoperative imaging parameter changes were compared between the two groups. Shapiro-Wilk, t-tests or Mann-Whitney U tests, repeated measures ANOVA, and Bonferroni post hoc tests were applied for statistical analysis.

RESULTS

Both groups showed significant improved pain (p < 0.05). At 1-month and 3-month postoperative follow-ups, OLIF360 group scores superior in Visual Analog Scale than PLIF group (p < 0.05). Greater disc height and lumbar lordosis were displayed in OLIF360 group than PLIF group (p < 0.05). No significant difference in screw placement accuracy between groups was observed. Moreover, significant increases in spinal canal area postoperatively (71.04 ± 6.27 mm2 preop to 109.65 ± 12.34 mm2 postop, p < 0.05) and bilateral foraminal areas were found in the OLIF360 group.

CONCLUSION

OLIF360 can have promising short-term efficacy for severe lumbar stenosis treatment with shorter recovery time than PLIF.

AI-based lumbar central canal stenosis classification on sagittal MR images is comparable to experienced radiologists using axial images

OBJECTIVES

The assessment of lumbar central canal stenosis (LCCS) is crucial for diagnosing and planning treatment for patients with low back pain and neurogenic pain. However, manual assessment methods are time-consuming, variable, and require axial MRIs. The aim of this study is to develop and validate an AI-based model that automatically classifies LCCS using sagittal T2-weighted MRIs.

METHODS

A pre-existing 3D AI algorithm was utilized to segment the spinal canal and intervertebral discs (IVDs), enabling quantitative measurements at each IVD level. Four musculoskeletal radiologists graded 683 IVD levels from 186 LCCS patients using the 4-class Lee grading system. A second consensus reading was conducted by readers 1 and 2, which, along with automatic measurements, formed the training dataset for a multiclass (grade 0-3) and binary (grade 0-1 vs. 2-3) random forest classifier with tenfold cross-validation.

RESULTS

The multiclass model achieved a Cohen's weighted kappa of 0.86 (95% CI: 0.82-0.90), comparable to readers 3 and 4 with 0.85 (95% CI: 0.80-0.89) and 0.73 (95% CI: 0.68-0.79) respectively. The binary model demonstrated an AUC of 0.98 (95% CI: 0.97-0.99), sensitivity of 93% (95% CI: 91-96%), and specificity of 91% (95% CI: 87-95%). In comparison, readers 3 and 4 achieved a specificity of 98 and 99% and sensitivity of 74 and 54%, respectively.

CONCLUSION

Both the multiclass and binary models, while only using sagittal MR images, perform on par with experienced radiologists who also had access to axial sequences. This underscores the potential of this novel algorithm in enhancing diagnostic accuracy and efficiency in medical imaging.

KEY POINTS

Question How can the classification of lumbar central canal stenosis (LCCS) be made more efficient? Findings Multiclass and binary AI models, using only sagittal MR images, performed on par with experienced radiologists who also had access to axial sequences. Clinical relevance Our AI algorithm accurately classifies LCCS from sagittal MRI, matching experienced radiologists. This study offers a promising tool for automated LCCS assessment from sagittal T2 MRI, potentially reducing the reliance on additional axial imaging.

Understanding the comorbidities among psychiatric disorders, chronic low-back pain, and spinal degenerative disease using observational and genetically informed analyses

Psychiatric disorders and symptoms are associated with differences in pain perception and sensitivity. These differences can have important implications in treating spinal degenerative disease (SDD) and chronic low-back pain (CLBP). Leveraging data from the UK Biobank (UKB) and the All of Us Research Program (AoU), we investigated the effects linking psychiatric disorders (alcohol use disorder, anxiety, attention deficit hyperactivity disorder, bipolar disorder, cannabis use disorder, depression, opioid use disorder, posttraumatic stress disorder, and schizophrenia) to SDD and CLBP. We applied multi-nominal regression models, polygenic risk scoring (PRS), and one-sample Mendelian randomization (MR) to triangulate the effects underlying the associations observed. We also performed gene ontology and drug-repurposing analyses to dissect the biology shared among mental illnesses, SDD, and CLBP. Comparing individuals affected only by SDD (UKB N=37,745, AoU N=3,477), those affected only by CLBP (UKB N=15,496, AoU N=23,325), and those affected by both conditions (UKB N=11,463, AoU N= 13,451) to controls (UKB N=337,362, AoU N= 117,162), observational and genetically informed analyses highlighted that the strongest effects across the three case groups were observed for alcohol use disorder, anxiety, depression, and posttraumatic stress disorder. Additionally, schizophrenia and its PRS appeared to have an inverse relationship with CLBP, SDD, and their comorbidity. One-sample MR highlighted a potential direct effect of internalizing disorders on the outcomes investigated that was particularly strong on SDD. Our drug-repurposing analyses identified histone deacetylase inhibitors as targeting molecular pathways shared among psychiatric disorders, SDD, and CLBP. In conclusion, these findings support that the comorbidity among psychiatric disorders, SDD, and CLBP is due to the contribution of direct effects and shared biology linking these health outcomes. These pleiotropic mechanisms together with sociocultural factors play a key role in shaping the SDD-CLBP comorbidity patterns observed across the psychopathology spectrum.

Variations in ECM Topography, Fiber Alignment, Mechanical Stiffness, and Cellular Composition Between Ventral and Dorsal Ligamentum Flavum Layers: Insights Into Hypertrophy Pathogenesis

Background

Previous studies have suggested that changes in the composition of the extracellular matrix (ECM) play a significant role in the development of ligamentum flavum hypertrophy (LFH) and the histological differences between the ventral and dorsal layers of the hypertrophied ligamentum flavum. Although LFH is associated with increased fibrosis in the dorsal layer, comprehensive research exploring the characteristics of the ECM and its mechanical properties in both regions is limited. Furthermore, the distribution of fibrosis-associated myofibroblasts within LFH remains poorly understood. This study aimed to bridge the existing knowledge gap concerning the intricate relationships between ECM characteristics, mechanical properties, and myofibroblast expression in LFH.

Methods

Histological staining, scanning electron microscopy, and atomic force microscopy were used to analyze the components, alignment, and mechanical properties of the ECM. Immunostaining and western blot analyses were performed to assess the distribution of myofibroblasts in LF tissues.

Results

There were notable differences between the dorsal and ventral layers of the hypertrophic ligamentum flavum. Specifically, the dorsal layer exhibited higher collagen content and disorganized fibrous alignment, resulting in reduced stiffness. Immunohistochemistry analysis revealed a significantly greater presence of α-smooth muscle actin (αSMA)-stained cells, a marker for myofibroblasts, in the dorsal layer.

Conclusions

This study offers comprehensive insights into LFH by elucidating the distinctive ECM characteristics, mechanical properties, and cellular composition disparities between the ventral and dorsal layers. These findings significantly enhance our understanding of the pathogenesis of LFH and may inform future research and therapeutic strategies.

Open Midline Decompression with Ligament Reconstruction for Multiple-Level Spinal Stenosis in Elderly Patients

(1) Background: Multiple lumbar spinal stenosis (LSS) is a degenerative disease that is increasingly prevalent with global aging. Multilevel fusion surgery is burdensome to perform in elderly patients, especially with osteoporosis and underlying disease. This study introduces open midline decompression (OMD) with ligament reconstruction as an alternative stabilization technique for elderly patients with multilevel LSS. (2) Methods: A retrospective review included 42 elderly patients aged 70 or older diagnosed with LSS at three or more levels and who underwent OMD with ligament reconstruction. Pre- and postoperative clinical and radiologic data were analyzed. (3) Results: Thirty-three patients underwent three-level surgeries, and twelve patients underwent four-level surgeries. The mean operative time was 240 ± 42.2 min (74.6 ± 14.9 min per level) with a mean blood loss of 282.9 ± 167.1 cc. Clinical outcome (VAS) and quality of life parameters (SF-12) showed significant improvement after surgery. Postoperative MRI showed sufficient decompression. Dynamic X-rays showed improvement in instability after surgery, but it was statistically insignificant. (4) Conclusions: OMD with ligament reconstruction provides effective neural decompression while preserving the posterior arch and offers soft stabilization with artificial ligaments. It is a safe and viable surgical option for elderly patients with multilevel LSS.

Identifying modifiable factors that influence walking in patients undergoing surgery for neurogenic claudication: a prospective longitudinal study

Neurogenic claudication, caused by lumbar spinal stenosis, is the most common reason for spinal surgery in older adults, aiming to improve pain and walking. However, most people do not increase walking post-operatively. This study aimed to identify modifiable physical and psychosocial factors that could be targeted with rehabilitation. A prospective longitudinal study recruited 97 adults, aged > 50 years, awaiting surgery for neurogenic claudication. Walking measures (six-minute walk test, daily step count, self-rated maximum walking distance) were assessed pre-surgery and 12-weeks post-surgery. Modifiable variables, mapped to a behaviour change model (COM-B; e.g. falls, lower limb performance, fear of movement, illness perceptions), were evaluated using mixed-effects regression models. All walking measures demonstrated statistically significant improvements (p < .001). However, 50% did not achieve minimum clinically important differences. The strongest correlation with post-operative walking was pre-operative walking. Cross-sectionally, lower limb performance (b:.75; 95CI .64, .86 to b:.35; 95%CI .19, .52), pre-surgery history of falls (b:-.29; 95%CI-.44,-.13), fear of falling (b:-.55; 95%CI-.69,-.41 to b:-.32; 95%CI -.48, -.15), fear of movement (b:-.48; 95%CI-.63,-.33 to -.22; 95%CI -.40, -.03), coherence of condition (b:-.23; 95%CI -.41, -.05 to b:-.17; 95%CI-.33,-.01) and perceived personal control (b:.26; 95%CI .09, .43 to b:.14; 95%CI.02,.31), were significantly associated with pre-surgical walking (p < .05). Most pre-surgical variables were not longitudinally associated with change in walking post-surgery. Six-weeks post-surgery fear of falling (b:-.35; 95%CI -.57, -.13 to b:-.18; 95%CI-.33,-.02), fear of movement (b:-.32; 95%CI-.53,-.11 to b:-.19; 95%CI -.33, -.05), and emotional response (b-.24; 95%CI -.38, -.11 to b:-.22; 95%CI -.41, -.03) were significantly associated with less improvement in walking at 12-weeks post-surgery. Prehabilitation and post-operative rehabilitation targeting walking, balance, and psychosocial factors is recommended to optimise post-surgical walking.

Cross-cultural adaptation and validation of the Thai version of the core outcome measures index for the back (COMI-back) in patients with low back pain

PURPOSE

To translate and culturally adapt the Core Outcome Measures Index for the back (COMI-back) into Thai and to evaluate its psychometric properties in Thai-speaking patients with low back pain (LBP).

METHODS

The translation process followed a standardized forward-backward method with two independent translators, followed by synthesis and back-translation. An expert committee reviewed the translations for cultural and conceptual equivalence. Pre-testing was done with Thai patients to refine the questionnaire. The validation study included 131 patients with LBP, who completed the Thai COMI-Back along with other validated questionnaires like the Oswestry Disability Index (ODI), and EQ-5D-5L. Reliability was assessed using Cronbach's alpha and intraclass correlation coefficients (ICC). Construct validity was determined by correlating COMI scores with those of reference scales.

RESULTS

The Thai COMI-Back exhibited strong reliability, with Cronbach's alpha values from 0.89 to 0.93 and ICC values over 0.80 for all domains. Construct validity was supported by significant correlations with reference scales, with Spearman's rho values ranging from 0.47 to 0.84. Floor and ceiling effects were acceptable for most items, with notable exceptions for symptom-specific well-being and work disability.

CONCLUSION

The Thai COMI-Back shows strong psychometric properties, making it suitable for clinical and research use in Thailand.

Endoscopic surgery for multilevel spinal stenosis: a comprehensive meta-analysis and subgroup analysis of uniportal and biportal approaches

Minimally invasive spine surgery (MIS) has shown promising results, and endoscopic spine surgery has emerged as a less invasive approach. Although studies have examined the effectiveness of endoscopic surgery for spinal stenosis, no meta-analyses have focused on multilevel cases. This meta-analysis aimed to evaluate the efficacy and safety of uniportal and biportal endoscopy in patients with multilevel spinal stenosis. The patient, intervention, comparison, outcomes, and study criteria were established to guide study selection. Four databases were searched. The outcome measures included patient-reported outcome measures (PROMs), radiological and analytical data, complications, surgery time, length of hospital stay, and blood loss. Review Manager ver. 5.4 software (RevMan; Cochrane, UK) was used for the analysis. Heterogeneity was assessed using the chi-square and I2 tests. Ten studies (n=686) were included. PROMs showed significant improvements in Visual Analog Scale (VAS) scores for back pain (mean difference [MD], 4.07; 95% confidence intervals [CI], 3.72-4.42), leg pain (MD, 5.49; 95% CI, 5.17-5.80), and Oswestry Disability Index (MD, 35.97; 95% CI, 32.46-39.47). MacNab scale results were as follows: excellent (55.37%), good (34.93%), fair (7.58%), and poor (4.06%). C-reactive protein levels did not change significantly; however, hemoglobin levels decreased postoperatively (MD, 1.28; 95% CI, 0.91-1.65). Complications included dural tears (5.46%), hematoma (4.30%), incomplete decompression (3.12%), root injury (2.90%), reoperations/revisions (2.22%), conversion to open or microscopic surgery (1.97%), and transfusions (8.50%). Analysis by levels showed worse VAS leg pain in studies analyzing >30% multilevel stenosis (MD, 4.99; 95% CI, 4.47-5.51 vs. MD, 5.82; 95% CI, 5.63-6.01). Uniportal and biportal endoscopy had similar outcomes, except for a higher incidence of dural tears on biportal endoscopy (uniportal, 3.33%; biportal, 7.05%). This meta-analysis supports endoscopy as an effective and safe option for multilevel lumbar stenoses. It improves long-term pain and functionality, with no significant radiological changes or postoperative inflammation. Complications are few; however, dural tears are more common in biportal endoscopy. Higher multilevel stenosis rates were associated with increased leg pain and a lower likelihood of achieving incomplete decompression.

Bilateral synchronous UBE for unilateral laminotomy and bilateral decompression as a potentially effective minimally Invasive approach for two-level lumbar spinal stenosis

Currently, Unilateral biportal endoscopy is widely used in the surgical treatment of lumbar spinal stenosis. To investigate the feasibility of bilateral synchronous UBE to unilateral laminotomy and bilateral decompression(BS-UBE-ULBD) for treating two-level lumbar spinal stenosis (LSS). Sixty-four patients with two-level lumbar spinal stenosis (LSS) treated with BS-UBE-ULBD from October 2022 to January 2024 were retrospectively analyzed. All patients were treated with BS-UBE-ULBD. All 64 patients successfully underwent surgery, and the duration of surgery was 95-180 min, with an average of 119.92 ± 14.79 min. The average number of fluoroscopy was 3.02 ± 0.92. The average blood loss during the surgery was 73. 44 ± 36.70 ml. Postoperative lumbar CT showed that the spinal canal and bilateral nerve roots were fully decompressed. There were no postoperative complications, such as infection, severe nerve root injury, and lumbar instability. Complete follow-up data were obtained for all 64 cases. The VAS score of low back and leg pain and the ODI of lumbar function significantly (P < 0.05) improved at each follow-up time point. MacNab evaluation at 6 months after the surgery showed that the results were excellent in 48 cases, good in 14 cases, and fair in 2 cases. The excellent and good rate was 96. 88% (62/64). So BS-UBE-ULBD is a minimally invasive, highly effective, and safe procedure for 2-level LSS.Degenerative lumbar spinal stenosis (LSS) refers to clinical symptoms caused by the compression of the cauda equina, nerve root, and vascular complex. LSS can occur due to the abnormal shape and volume of the bony or fibrous structure after degenerative changes and the stenosis of the inner diameter of one or more lumens at a single level or multiple levels. It is a common cause of lumbago or lumbago and leg pain, which is common among middle-aged and elderly people1. LSS has become the most common cause of lumbar surgery among patients over 60 years of age2. However, traditional surgery necessitates extensive stripping of paraspinal muscles, which can easily lead to the ischemic injury of paraspinal muscles and atrophy after denervation. Therefore, traditional surgery may result in intractable back pain, stiffness, and discomfort after surgery3,4. Furthermore, as the posterior bone and soft tissue structures need to be extensively resected during the surgery, epidural scar and nerve compression are highly likely after the surgery. The high risk of general anesthesia cannot be ignored among elderly and weak patients2,5.Recently, with the rapid development of minimally invasive spine surgery, endoscopic surgery has been applied in the treatment of LSS6. Unilateral biportal endoscopy (UBE ) is more popular in treating LSS and is a more flexible operation, with small trauma, quick recovery, and a gentle learning curve. In addition, many studies have proven the good clinical efficacy of unilateral biportal endoscopy7. Multilevel spinal stenosis can be done simultaneously. Previously, the same operator decompressed multiple segments in turn8,9, but the operation lasted longer, and the corresponding problems, such as bleeding, high risk of anesthesia, and fluoroscopy frequency, increased.From October 2022 to June 2024, our hospital pioneered the use of Bilateral Synchronous UBE-unilateral Laminotomy and Bilateral Decompression (BS-UBE-ULBD) for two-level degenerative LSS. Sixty-four patients with two-segment LSS were treated with BS-UBE-ULBD, and the results were satisfactory.

Experiences of recovery and rehabilitation from surgery to treat neurogenic claudication. A qualitative study

PURPOSE

This study aimed to explore the experiences, expectations, attitudes and beliefs about surgery and recovery in people with neurogenic claudication, and their preferences for rehabilitation.

METHODS

Semi-structured interviews were conducted with a purposive sample of 16 patients (8 female; mean age 70 years) following surgery for neurogenic claudication. Data were transcribed verbatim, analysed using reflexive thematic analysis and interpreted using the five constructs of the Integrative Model of Expectations: treatment, timeline, behaviour, outcome, and generalised expectations.

FINDINGS

Three themes were developed: (1) making sense of recovery through a biomedical model of illness; (2) the mismatch between expectation and recovery (subthemes: the unanticipated burden of recovery; hope versus reality: expectations of the ultimate outcome); (3) one size doesn't fit all: the need for tailored rehabilitation. Participants expressed a preference for tailored, supervised rehabilitation commencing 2-6 weeks post-surgery. Some participants preferred one-to-one and some group-based rehabilitation. Some participants thought pre-operative rehabilitation would be beneficial.

CONCLUSIONS

Patient's experiences and satisfaction with their care and outcome are heavily influenced by their expectations. Tailored rehabilitation should reframe unrealistic expectations regarding care, recovery, and ultimate outcome; educate patients on the biopsychosocial model of pain; and equip patients with the knowledge and skills to optimise their outcome.IMPLICATIONS FOR REHABILITATIONPeople with neurogenic claudication interpret their condition, symptoms, and recovery from surgery through a mechanistic, biomedical lens.The experience and recovery from surgery for neurogenic claudication can be unexpectedly challenging and burdensome.Healthcare professionals should support patients by helping to set realistic expectations of post-operative care, recovery, and outcome from surgery.People undergoing surgery for neurogenic claudication want rehabilitation, personalised to their individual circumstances and requirements.

The Clinical Status of Patients With Lumbar Spinal Stenosis Reflects Their Individual Decision to Undergo or Defer Lumbar Spinal Surgery

OBJECTIVE

To evaluate whether functional, clinical, and self-reported tests reflect lumbar spinal stenosis patients' decisions to undergo or defer surgery.

METHODS

Among 108 participants, 77 chose surgery (SG), and 31 opted to wait and see (WaSG) whether they got better spontaneously. Both groups were assessed at baseline (t0) and 3 months (t1), with additional self-reported measures at 6 (t2) and 12 months (t3). Key outcomes included corridor walk distance, chair sit-to-stand repetitions, grip strength, and various pain and disability indices.

RESULTS

At baseline, SG reported higher leg pain (NPRS-leg: Δ = 1.66, P = 0.002) and poorer functional outcomes across multiple tests. By t1, both groups improved in disability, but SG showed greater reductions in the Oswestry Disability Index (Δ = 7.85, P = 0.001) and sustained improvements in leg pain at subsequent assessments. WaSG consistently engaged in more walking (mean Δ = 123.5 minutes, P < 0.001). Regression analyses indicated that surgery status, flexibility, and strength significantly predicted improvements in disability (adjusted R² = 0.296). Logistic regression identified predictors for surgery choice, including biological sex, leg pain intensity, walking performance, and weekly walking hours.

CONCLUSION

Functional status, self-reported disability, and fear-avoidance beliefs in lumbar spinal stenosis patients reflect their subjective decision regarding surgery and highlight the importance of baseline leg pain, calf strength, walking-related parameters, and physical function in recovery.

STUDY DESIGN

Observational prospective cohort.

Diagnostic imaging in the management of older adults with low back pain: analysis from the BAck Complaints in Elders: Chiropractic - Australia cohort study

BACKGROUND

Diagnostic imaging is commonly used in the management of low back pain (LBP), with approximately one-quarter of those who present to primary care referred for imaging. Current estimates of imaging frequency commonly exclude older adults; however, pathology detected with imaging (e.g., osteoporosis, cancer) may occur more frequently in older populations. The aims of this study were to: (i) determine the frequency and forms of diagnostic imaging use in older adults presenting for chiropractic care for LBP in Australia; (ii) describe participant characteristics associated with imaging use; and (iii) describe the types of radiographic findings.

METHODS

Data were collected from the BAck Complaints in Elders: Chiropractic-Australia (BACE: C-A) study, a 12-month, prospective cohort study of adults aged ≥ 55 years with a new episode of LBP. Self-reported frequency of imaging use (baseline, 2 and 6 weeks, 3, 6, 9, and 12 months) was reported descriptively by imaging modality. Imaging reports were obtained, and imaging findings were independently extracted and categorised. Baseline characteristics were assessed for differences in those who received imaging compared to those who did not. Proportions of imaging use and imaging findings were presented descriptively with 95% confidence intervals.

RESULTS

The BACE: C-A cohort comprised 217 participants of whom 60.8% reported receiving diagnostic imaging for their current episode of LBP. X-ray was performed most (44.7%), followed by computed tomography (CT) (30.8%). Participants receiving imaging reported higher low back disability, more healthcare use for LBP, more frequent leg pain, more suspected serious pathology, and stronger beliefs that imaging was important. Degenerative changes were the most common imaging finding (96.6%). Pathology of possible clinical significance, including compression fracture or suspected osteoporosis, was present in 15.5% of participants.

CONCLUSION

Three out of five older adults with LBP who sought chiropractic care received imaging over one-year. Participants receiving imaging tended to have more complex presentations (e.g., more disability, suspected underlying pathology) or stronger beliefs that imaging was necessary for the management of LBP. Degenerative changes were the most common imaging finding. Pathology of potential clinical relevance was present on approximately 15% of imaging reports received. No conditions requiring immediate medical attention were reported.

Surgical Outcomes of Unilateral Biportal Endoscopy Versus Full Endoscopy for Lumbar Canal Stenosis: A Meta-Analysis

Lumbar canal stenosis (LCS) is a common cause of chronic lower back pain in the elderly. Traditionally, open decompression surgery has a prolonged recovery, higher blood loss, and more complications. As a result, there remains no clear consensus on which of these minimally invasive spine surgery (MISS) techniques, including unilateral biportal endoscopy (UBE) and full endoscopy (FE), is the optimal technique for LCS treatment. A systematic review and meta-analysis were accomplished to compare the surgical results of UBE versus FE for lumbar canal stenosis in regard to surgical success, postoperative pain control, operative times, complication rates, and functional outcomes. Studies from 2024 were searched comprehensively in PubMed, Scopus, and other databases. Randomized controlled trials (RCTs) and experimental studies comparing UBE with FE were included. Surgical success rates, pain scores (visual analog scale (VAS)), recovery time, and complications were the key outcomes analyzed. Five studies (sample size: 32-163) were included. High surgical success and no significant difference in pain relief were demonstrated by both UBE and FE. UBE was associated with significantly quicker recovery times (odds ratio (OR): 0.54, 95% confidence interval (CI): 0.35-0.83, P = 0.01). The complication rates were lower with UBE compared with FE. Both techniques improved functional outcomes, but UBE had a slight advantage in recovery time. Both UBE and FE present effective treatments for LCS, and UBE is superior concerning recovery time. The choice of technique should be based on the patient's characteristics, and surgical goals should be tailored to each individual patient.

Effectiveness of percutaneous key lesion endoscopic lumbar decompression for the treatment of lumbar spinal stenosis in octogenarian patients

INTRODUCTION

With increasing life expectancy, degenerative lumbar spinal stenosis (LSS) has become a common problem in the geriatric population. LSS reduces the quality of life, limits daily activities, and requires therapeutic aids. We share our experiences of treating octogenarian patients with LSS with key lesion percutaneous single portal endoscopic unilateral laminotomy and bilateral decompression (sEndo-ULBD).

MATERIALS AND METHODS

Nine octogenarian patients who underwent sEndo-ULBD between January 2021 and July 2022 were prospectively enrolled in this study. Their visual analogue score (VAS), Oswestry Disability Index (ODI), disc height, spondylolisthesis, lumbar lordotic angle, lumbar scoliotic angle, and spinal canal area before and after sEndo-ULBD were followed up for more than six months.

RESULTS

The VAS score was significantly reduced three months after the operation (p < 0.05). The postoperative ODI scores of all patients improved relative to their preoperative scores; this difference became significant in the third month after the operation (p < 0.05). Index-level disc height did not significantly change after the operation. Spondylolisthesis, lumbar lordotic angle, and lumbar scoliotic angle showed no significant curve progression. The spinal canal area increased markedly after sEndo-ULBD (p <0.05), with no known surgery-related complications.

CONCLUSIONS

Key lesion sEndo-ULBD was an appropriate, safe, and effective treatment for octogenarian patients suffering from degenerative LSS. With an average follow-up of over one year, we did not find any significant progression in spinal curvature or instability. sEndo-ULBD is an ideal alternative to aggressive fusion fixation lumbar surgery for managing degenerative LSS in octogenarian patients with functional disability.

Increased Risk of Osteoporotic Vertebral Compression Fractures Following Epidural Steroid Injections in Patients with Lumbar Degenerative Disease: A Retrospective Cohort Study

Background/Objectives: Lumbar degenerative disease is a common age-related condition, with epidural steroid injection (ESI) being a widely employed conservative treatment approach. However, the potential effect of ESI on osteoporosis and fracture risk remains unclear. This study investigated the risk of osteoporotic vertebral compression fractures (OVCFs) in patients with lumbar degenerative disease who underwent ESI treatment. Methods: A cohort of 64 patients who received ESI treatment and a control group of 256 patients were included in this study. Demographic data, clinical characteristics, and follow-up information were collected. Cox proportional hazards models were used to analyze risk factors for OVCF, and subgroup analyses were conducted. Results: OVCF was more common in the ESI group than in the control group (hazard ratio [HR]: 3.49, 95% confidence interval [CI]: 1.06-11.43, p = 0.039). After confounding factors were adjusted for, ESI remained an independent risk factor for OVCF (HR: 4.60, 95% CI: 1.01-20.89, p = 0.048). In a subgroup analysis, lower socioeconomic status was associated with higher OVCF risk (HR: 11.82, 95% CI: 1.06-131.26, p = 0.044). The ESI group had improved short-term pain relief, with nonsignificant long-term effects. Conclusions: Patients with lumbar degenerative disease receiving ESI treatment are at an increased risk of OVCF, particularly those with lower socioeconomic status. These findings underscore the importance of regular bone density monitoring and fracture prevention following ESI treatment. Clinicians should carefully weigh the short-term benefits of ESI against the long-term risks and develop individualized follow-up plans for high-risk patients.

Convolutional Neural Network Incorporating Multiple Attention Mechanisms for MRI Classification of Lumbar Spinal Stenosis

BACKGROUND

Lumbar spinal stenosis (LSS) is a common cause of low back pain, especially in the elderly, and accurate diagnosis is critical for effective treatment. However, manual diagnosis using MRI images is time consuming and subjective, leading to a need for automated methods.

OBJECTIVE

This study aims to develop a convolutional neural network (CNN)-based deep learning model integrated with multiple attention mechanisms to improve the accuracy and robustness of LSS classification via MRI images.

METHODS

The proposed model is trained on a standardized MRI dataset sourced from multiple institutions, encompassing various lumbar degenerative conditions. During preprocessing, techniques such as image normalization and data augmentation are employed to enhance the model's performance. The network incorporates a Multi-Headed Self-Attention Module, a Slot Attention Module, and a Channel and Spatial Attention Module, each contributing to better feature extraction and classification.

RESULTS

The model achieved 95.2% classification accuracy, 94.7% precision, 94.3% recall, and 94.5% F1 score on the validation set. Ablation experiments confirmed the significant impact of the attention mechanisms in improving the model's classification capabilities.

CONCLUSION

The integration of multiple attention mechanisms enhances the model's ability to accurately classify LSS in MRI images, demonstrating its potential as a tool for automated diagnosis. This study paves the way for future research in applying attention mechanisms to the automated diagnosis of lumbar spinal stenosis and other complex spinal conditions.

Role of IL3RA in a Family with Lumbar Spinal Stenosis

Lumbar spinal stenosis (LSS) is a degenerative spinal condition characterized by the narrowing of the spinal canal, resulting in low back pain (LBP) and limited leg mobility. Twin and family studies have suggested that genetics contributes to disease progression. However, the genetic causes of familial LSS remain unclear. We performed whole-exome and direct sequencing on seven female patients from a Han Chinese family with LBP, among whom four developed LSS. Based on our genetic findings, we performed gene knockdown studies in human chondrocytes to study possible pathological mechanisms underlying LSS. We found a novel nonsense mutation, c.417C > G (NM_002183, p.Y139X), in IL3RA, shared by all the LBP/LSS cases. Knockdown of IL3RA led to a reduction in the total collagen content of 81.6% in female chondrocytes and 21% in male chondrocytes. The expression of MMP-1, -3, and/or -10 significantly increased, with a more pronounced effect observed in females than in males. Furthermore, EsRb expression significantly decreased following IL3RA knockdown. Moreover, the knockdown of EsRb resulted in increased MMP-1 and -10 expression in chondrocytes from females. We speculate that IL3RA deficiency could lead to a reduction in collagen content and intervertebral disk (IVD) strength, particularly in females, thereby accelerating IVD degeneration and promoting LSS occurrence. Our results illustrate, for the first time, the association between IL3RA and estrogen receptor beta, highlighting their importance and impact on MMPs and collagen in degenerative spines in women.

Transthyretin amyloidosis in patients with spinal stenosis who underwent spinal surgery: a systematic review and meta-analysis

Background

Accumulation of transthyretin amyloids (ATTR) is detected in ligamentum flavum in about 1/3 of patients underwent surgery for spinal stenosis. However, the significance of this finding is not known. The aim of this systematic review and meta-analysis is to analyze the incidence and importance of ATTR in patients with spinal stenosis who underwent spinal surgery.

Methods

The primary outcome measure was incidence of ATTR in patients with spinal stenosis. English language observational studies published within 10 years period were searched in Pubmed and Taylor and Francis databases.

Results

Nine articles were included in the systematic review. The incidence of positive ATTR among patients who underwent lumbar spinal surgery was 48% (95%CI 38-58%). ATTR deposits were found in the lumbar region the most frequently. Seven studies showed that patients with positive ATTR were older than those with negative. Five studies investigated and found a significant relationship between the ligamentum flavum thickness and positive ATTR. Five studies investigated cardiac involvement among patients with positive ATTR.

Conclusion

ATTR deposits are frequently found in older patients with spinal stenosis, especially in the lumbar region. The presence of ATTR deposits is related to ligamentum flavum thickness.

Walking stress-induced changes in gait patterns and muscle activity: Patients with lumbar spinal stenosis versus asymptomatic controls

INTRODUCTION

Patients with symptomatic lumbar spinal stenosis (sLSS) are often limited in their walking range because of worsening symptoms, which is thought to induce changes in the gait pattern. The aim of this study was to determine whether changes in gait pattern and muscle activity in these patients are elicited by a walking stress and differ from asymptomatic controls.

METHODS

Twenty patients with sLSS and 19 asymptomatic controls performed a 30-minute walking stress. Gait was assessed using seven inertial sensors and sagittal joint range of motion (ROM) was calculated during different phases of gait. Muscle activation of the gluteus medius, erector spinae and multifidus muscles was measured by surface electromyography (EMG) and integrated EMGs (normalized to the maximum during gait) were calculated. Differences between groups and time points (beginning and end) were assessed using mixed factorial analysis of variance.

RESULTS

Patients had less knee extension ROM in terminal stance, less knee flexion ROM in swing and less overall hip flexion/extension ROM than controls (p ≤ 0.03). There were no functionally relevant changes in these parameters during the walking stress. The integrated EMG was greater in all muscles in patients than in controls and increased in both groups during the walking stress in the paraspinal but not in the gluteus medius muscle. There was no interaction between group and time for any of the parameters.

CONCLUSION

Differences in gait pattern and muscle activity between patients with sLSS and controls are generally present, but are not amplified by a walking stress.

Manual therapists' appraisal of optimal non-pharmacological conservative management of patients with lumbar spinal stenosis. An international Delphi study

BACKGROUND

Lumbar Spinal Stenosis (LSS) is a slow progressive degenerative disorder associated with chronic pain and disability. Although consensus-based international guidelines for invasive treatment of patients with LSS exist, few consensus-based guidelines for optimal conservative management strategies have been published.

OBJECTIVE

To achieve manual therapists' consensus on optimal physiotherapeutic management strategies for LSS.

METHODS

The study employed a three-round, email-based International Delphi survey. All qualified members of the International Maitland Teacher Association (IMTA) (n = 30) were invited to participate.

RESULTS

Twelve IMTA teachers participated in the study. Eight essential physiotherapy management strategies were identified, as follows: 1. Detailed assessment with in-depth interview; 2. Recognition of red flags, contraindications and precautions; 3. Neurological examination; 4. Postural and movement analysis with related ergonomics; 5. Functional analysis; 6. Individualized treatment based on assessment findings and research evidence; 7. Aerobic training and 8. Patient education.

CONCLUSION

This Delphi survey provides a foundation for physiotherapists to individualize and optimise management approaches for patients with LSS. With a growing elderly population, there is an increasing need for evidence-based conservative management guidelines based on high quality research.

Clinical assessment and management of lumbar spinal stenosis: clinical dilemmas and considerations for surgical referral

Lumbar spinal stenosis is the leading indication for spine surgery in older adults. Surgery is recommended in clinical guidelines if non-surgical treatments have been provided with insufficient benefit. The difficulty for clinicians is that the current number of randomised controlled trials is low, which creates uncertainty about which treatments to provide. For non-surgical clinicians this paucity of data leads to a clinical dilemma of whether to continue managing the patient or refer to a spine surgeon. This Viewpoint aims to provide an update on the assessment of lumbar spinal stenosis, treatment recommendations, indications for referral to a spine surgeon, and current clinical dilemmas facing non-surgical clinicians and spinal surgeons.

Causal effects of specific gut microbiota on spinal stenosis diseases: a two-sample mendelian randomization study

Background

Although recent observational studies and clinical trials have indicated a strong association between the gut microbiota and spinal stenosis diseases, the causal relationship between them remains unclear.

Methods

Based on large-scale genome-wide association studies, we employed two-sample Mendelian randomization (MR) to analyse the causal relationships between the gut microbiota (GM) and 3 spinal stenosis diseases: adolescent idiopathic scoliosis (AIS), lumbar spondylolisthesis (LS), and spinal stenosis (SS). MR analysis was performed using the inverse variance weighting (IVW) method as the primary approach, supplemented by MR‒Egger regression, weighted median, and weighted mode analyses. MR-PRESSO and MR‒Egger regression were employed to assess horizontal pleiotropy. Cochran's Q test was used to evaluate heterogeneity. Further leave-one-out sensitivity analysis was conducted to ascertain the reliability of the causal relationships.

Results

The IVW method identified 9 gut microbiota taxa (9 genera) that were causally related to AIS, 14 taxa (4 phyla, 2 classes, 2 orders, 1 family, and 5 genera) to LS, and 4 taxa (2 classes, 1 order, and 1 genus) to SS. The Cochrane Q test results did not indicate heterogeneity. Moreover, both the MR‒Egger intercept test and the MR-PRESSO global test demonstrated that our findings were robust against potential horizontal pleiotropy. Furthermore, leave-one-out analysis provided additional evidence supporting the reliability of our identified causal relationships.

Conclusion

Our findings have substantiated the potential causal impact of specific GM taxa on AIS, LS, and SS, thereby offering novel insights into the mechanisms mediated by the gut microbiota in these three diseases and laying the foundation for targeted preventive measures in further research.

Multicentre investigation on the effect of decompressive surgery on Balance and physical ActiviTy Levels amongst patients with lumbar Spinal stenosis (B-ATLAS): protocol for a prospective cohort study

INTRODUCTION

Patients with lumbar spinal stenosis may have poor balance, decreased physical function and problems maintaining physical activity levels due to radiculopathy. Decompressive surgery is often indicated if conservative management fails to achieve a satisfactory clinical outcome. While surgical management has proven effective at treating radiculopathy, and patients report increased physical function postoperatively, objective measures of postural control and physical activity remain sparse. This study aims to investigate the effects of decompressive surgery on postural control and activity levels of elderly patients with lumbar spinal stenosis using objective measurements.

METHODS AND ANALYSIS

This is a 24-month, multicentre, prospective cohort study. Patients ≥65 years of age with MRI-verified symptomatic lumbar central canal stenosis will be recruited from two separate inclusion centres, and all participants will undergo decompressive surgery. Preoperative data are collected up to 3 months before surgery, with follow-up data collected at 3, 6, 12 and 24 months postoperatively. Postural control measurements are performed using the Wii Balance Board, mini Balance Evaluation Systems Test and Tandem test, and data concerning physical activity levels are collected using ActiGraph wGT3X-BT accelerometers. Patient-reported outcomes regarding quality-of-life and physical function are collected from the EuroQol-5D, 36-Item Short Form Health Survey and Zurich Claudication Questionnaire. Primary outcomes are the change in the sway area of centre of pressure and total activity counts per day from baseline to follow-up at 24 months. A sample size of 80 participants has been calculated.

ETHICS AND DISSEMINATION

The study has been approved by the Regional Ethics Committee of Region Zealand (ID EMN-2022-08110) and the Danish Data Protection Agency (ID REG-100-2022). Written informed consent will be required from all participants before enrolment. All results from the study, whether positive, negative or inconclusive, will be published in international peer-reviewed journals and presented at national and international scientific meetings. Study findings will be further disseminated through national patient associations.

TRIAL REGISTRATION NUMBERS

NCT06075862 and NCT06057428.

Impact of Preoperative Intervertebral Disc Degeneration on Patient-Reported Outcome Measures After Lumbar Fusion

OBJECTIVE

The Pfirrmann scoring system classifies lumbosacral disc degeneration based on magnetic resonance imaging signal intensity. The relationship between pre-existing disc degeneration and patient-reported outcome measures (PROMs) after one-level lumbar fusion is not well documented. The purpose of this study was to investigate the relationship between the severity of preoperative intervertebral disc degeneration and preoperative and postoperative PROMs in patients undergoing one-level lumbar fusion.

METHODS

All adult patients who underwent posterior lumbar decompression and fusion or transforaminal lumbar interbody fusion between 2014 and 2022 were included. Patient demographics and comorbidities were extracted from medical records. Lumbar intervertebral discs on sagittal magnetic resonance imaging T2-weighted images were assessed by 2 independent graders utilizing Pfirrmann criteria. Grades I-III were categorized as low-grade disc degeneration, while IV-V were considered high grade. Multivariable linear regression assessed the impact of disc degeneration on PROMs.

RESULTS

A total of 150 patients were included, of which 69 (46%) had low-grade disc degeneration, while 81 (54%) had high-grade degeneration. Patients with high-grade degeneration had increased preoperative visual analog scale (VAS)-Leg scores (6.10 vs. 4.54, P = 0.005) and displayed greater 1-year postoperative improvements in VAS-Back scores (-2.11 vs. -0.66, P = 0.002). Multivariable regression demonstrated Pfirrmann scores as independent predictors for both preoperative VAS-Leg scores (P = 0.004) and postoperative VAS-Back improvement (P = 0.005).

CONCLUSIONS

In patients undergoing one-level lumbar fusion, higher Pfirmann scores were associated with increased preoperative leg pain and greater 1-year postoperative improvement in back pain. Further studies into the relationship of preoperative disc degeneration and their impact on postoperative outcomes may help guide clinical decision-making and patient expectations.

AI-Based Measurement of Lumbar Spinal Stenosis on MRI: External Evaluation of a Fully Automated Model

OBJECTIVES

The aim of this study was to clinically validate a fully automated AI model for magnetic resonance imaging (MRI)-based quantifications of lumbar spinal canal stenosis.

MATERIALS AND METHODS

This retrospective study included lumbar spine MRI of 100 consecutive clinical patients (56 ± 17 years; 43 females, 57 males) performed on clinical 1.5 (51 examinations) and 3 T MRI scanners (49 examinations) with heterogeneous clinical imaging protocols. The AI model performed segmentations of the thecal sac on axial T2-weighted sequences. Based on these segmentations, the anteroposterior (AP) and mediolateral (ML) distance, and the area of the thecal sac were measured in a fully automated manner. For comparison, 2 fellowship-trained musculoskeletal radiologists performed the same segmentations and measurements independently. Statistics included 1-sample t tests, the intraclass correlation coefficient (ICC), Bland-Altman plots, and Dice coefficients. A P value of <0.05 was considered statistically significant.

RESULTS

The average measurements of the AI model, reader 1, and reader 2 were 194 ± 72 mm 2 , 181 ± 71 mm 2 , and 179 ± 70 mm 2 for thecal sac area, 13 ± 3.3 mm, 12.6 ± 3.3 mm, and 12.6 ± 3.2 mm for AP distance, and 19.5 ± 3.9 mm, 20 ± 4.3 mm, and 19.4 ± 4 mm for ML distance, respectively. Significant differences existed for all pairwise comparisons, besides reader 1 versus AI model for the ML distance and reader 1 versus reader 2 for the AP distance ( P = 0.1 and P = 0.21, respectively). The pairwise mean absolute errors among reader 1, reader 2, and the AI model ranged from 0.59 mm and 0.75 mm for the AP distance, from 1.16 mm to 1.37 mm for the ML distance, and from 7.9 mm 2 to 15.54 mm 2 for the thecal sac area. Pairwise ICCs among reader 1, reader 2, and the AI model ranged from 0.91 and 0.94 for the AP distance and from 0.86 to 0.9 for the ML distance without significant differences. For the thecal sac area, the pairwise ICC between both readers and the AI model of 0.97 each was slightly, but significantly lower than the ICC between reader 1 and reader 2 of 0.99. Similarly, the Dice coefficient and Hausdorff distance between both readers and the AI model were significantly lower than the values between reader 1 and reader 2, overall ranging from 0.93 to 0.95 for the Dice coefficients and 1.1 to 1.44 for the Hausdorff distances.

CONCLUSIONS

The investigated AI model is reliable for assessing the AP and the ML thecal sac diameters with human level accuracies. The small differences for measurement and segmentation of the thecal sac area between the AI model and the radiologists are likely within a clinically acceptable range.

New ipsilateral full endoscopic interlaminar approach for L5-S1 foraminal and extraforaminal decompression: technique description and initial case series

BACKGROUND

The L5-S1 interlaminar access described in 2006 by Ruetten et al. represented a paradigm shift and a new perspective on endoscopic spinal approaches. Since then, the spinal community has shown that both the traditional ipsilateral and novel contralateral interlaminar approaches to the L5-S1 foramen are good alternatives to transforaminal access. This study aimed to provide a technical description and brief case series analysis of a new endoscopic foraminal and extraforaminal approach for pathologies at the lumbar L5-S1 level using a new ipsilateral interlaminar approach.

METHODS

Thirty patients with degenerative stenotic conditions at the L5-S1 disc level underwent the modified interlaminar approach. The surgical time, blood loss, occurrence of complications, and clinical outcomes were recorded. The data were compiled in Excel and analyzed using R software version 4.2. All continuous variables are presented as the mean, median, minimum, and maximal ranges. For categorical variables, data are described as counts and percentages.

RESULTS

Thirty patients were included in the study. The cohort showed significant improvements in all quality-of-life scores (ODI, visual analog scale of back pain, and visual analog scale of leg pain). Five cases of postoperative numbness and three cases of postoperative dysesthesia have been reported. No case of durotomy or leg weakness has been reported.

CONCLUSIONS

The fundamental change proposed by this procedure, the new ipsilateral approach, presents potential advantages to surgeons by overcoming anatomical challenges at the L5-S1 level and by providing surgeon-friendly visualization and access. This approach allows for extensive foraminal and extraforaminal decompression, including the removal of hernias and osteophytosis, without causing neural retraction of the L5-S1 roots while maintaining the stability of the operated level.

Factors that influence the results of indirect decompression employing oblique lumbar interbody fusion

BACKGROUND

Indirect decompression is one of the potential benefits of anterior reconstruction in patients with spinal stenosis. On the other hand, the reported rate of revision surgery after indirect decompression highlights the necessity of working out prediction models for the radiographic results of indirect decompression with assessing their clinical relevance.

AIM

To assess factors that influence radiographic and clinical results of the indirect decompression in patients with stenosis of the lumbar spine.

METHODS

This study is a single-center cross-sectional evaluation of 80 consecutive patients (17 males and 63 females) with lumbar spinal stenosis combined with the instability of the lumbar spinal segment. Patients underwent single level or bisegmental spinal instrumentation employing oblique lumbar interbody fusion (OLIF) with percutaneous pedicle screw fixation. Radiographic results of the indirect decompression were assessed using computerized tomography, while MacNab scale was used to assess clinical results.

RESULTS

After indirect decompression employing anterior reconstruction using OLIF, the statistically significant increase in the disc space height, vertebral canal square, right and left lateral canal depth were detected (Р < 0.0001). The median (M) relative vertebral canal square increase came to М = 24.5% with 25%-75% quartile border (16.3%; 33.3%) if indirect decompression was achieved by restoration of the segment height. In patients with the reduction of the upper vertebrae slip, the median of the relative increase in vertebral canal square accounted for 49.5% with 25%-75% quartile border (2.35; 99.75). Six out of 80 patients (7.5%) presented with unsatisfactory results because of residual nerve root compression. The critical values for lateral recess depth and vertebral canal square that were associated with indirect decompression failure were 3 mm and 80 mm2 respectively.

CONCLUSION

Indirect decompression employing anterior reconstruction is achieved by the increase in disc height along the posterior boarder and reduction of the slipped vertebrae in patients with degenerative spondylolisthesis. Vertebral canal square below 80 mm2 and lateral recess depth less than 3 mm are associated with indirect decompression failures that require direct microsurgical decompression.

How do information and physiotherapy affect health-related quality of life among patients with spinal stenosis undergoing decompression surgery: A qualitative study

BACKGROUND

There is a lack of qualitative research on how patients with lumbar spinal stenosis (LSS) undergoing surgery perceive their health-related quality of life (HRQOL). Research that increases our understanding in this area could facilitate a biopsychosocial approach to care.

AIM

We aimed to investigate the experiences of patients with LSS undergoing decompression surgery regarding their pre- and post-surgery perceptions of HRQOL and the pre-and post-operative information and physiotherapy.

METHOD

We used a qualitative design with semi-structured interviews to perform content analysis using an inductive approach. Twelve patients (7 female, 5 male) were included post-surgery and interviewed by phone. The interviews were recorded and transcribed verbatim.

RESULTS

Four distinct categories with nine associated subcategories were identified: Patients' feelings of safety and empowerment are enhanced by healthcare professionals; Divided perceptions of information and physiotherapy in a group context; Health-related quality of life is associated with patients' perceived physical capacity; Patients' optimism and concerns influence health-related quality of life.

CONCLUSION

Both physical and psychological factors pre- and post-surgery appear to influence patients' HRQOL. Inherent optimism and feelings of empowerment in the care process appear to be important factors, regardless of physical health status. A strong patient-provider relationship is important to promote self-efficacy, which may positively affect perceived HRQOL and is in line with the generally recommended biopsychosocial approach in the treatment of people with low back pain. As qualitative studies in this area are scarce, there is a need for further studies to validate our findings.

Efficacy of Biportal Endoscopic Decompression for Lumbar Spinal Stenosis: A Meta-Analysis With Single-Arm Analysis and Comparative Analysis With Microscopic Decompression and Uniportal Endoscopic Decompression

BACKGROUND AND OBJECTIVE

Biportal endoscopic decompression is a minimally invasive surgical technique for lumbar spinal stenosis (LSS). This meta-analysis aimed to evaluate the efficacy and safety of biportal endoscopic decompression through both a single-arm analysis and a comparative analysis.

METHODS

A comprehensive literature search was conducted to identify eligible studies reporting the outcomes of biportal endoscopic decompression for LSS. Single-arm analysis and comparisons with microscopic and uniportal endoscopic decompression were performed. Evaluated outcomes included visual analog scale (VAS) scores for back pain and leg pain, Oswestry Disability Index (ODI) scores, operation time, estimated blood loss, duration of hospital stay, and adverse events.

RESULTS

Single-arm analysis demonstrated significant improvements in VAS back pain, VAS leg pain, and ODI scores after biportal endoscopic decompression at postoperative 1-day to 36-month follow-up (all P < .001), compared with preoperative levels. The pooled mean single-level operation time was 71.44 min, and the pooled mean hospital stay was 3.63 days. The overall adverse event rate was 4.0%, with dural tear being the most common complication (3.0%). Compared with microscopic decompression, biportal endoscopic decompression showed significantly lower VAS back pain at 1-month ( P < .001) and 6-month ( P < .001) follow-up; lower VAS leg pain at 1-month ( P = .045) follow-up; lower ODI scores at 3-month ( P < .001), 12-month ( P = .017), and >12-month ( P = .007) follow-up; lower estimated blood loss ( P = .003); and shorter hospital stay ( P < .001). Adverse event rates did not differ between the techniques. No significant differences were observed between biportal endoscopic and uniportal endoscopic decompression groups for most efficacy and safety outcomes.

CONCLUSION

Biportal endoscopic decompression emerges as a safe and effective alternative for LSS, presenting potential advantages over the microscopic technique and comparable efficacy with the uniportal endoscopic technique.

Trends of Korean medicine service utilization for lumbar disc herniation and spinal stenosis: A 10-year analysis of the 2010 to 2019 data

This retrospective, cross-sectional, and descriptive study aimed to analyze the trend of utilizing traditional Korean medicine services in patients with lumbar disc herniation (LDH) and/or lumbar spinal stenosis (LSS). In this study, based on the national patient sample data provided by Health Insurance Review and Assessment Service (HIRA), the trend of Korean medicine service utilization was investigated, including the following information: demographic characteristics of the patients, the total expenditure, number of claim statements per category, medical care expenditure per category, and routes of visiting traditional Korean medicine institutions. The study population comprised patients who visited Korean medicine institutions at least once from January 2010 to December 2019, with LSS and LDH as the primary diagnosis. LDH patients who used traditional Korean medicine services for treatment increased by about 1.36 times. LDH and LSS patients under 45 years of age were more likely to be males, but women accounted for a higher percentage among those over 45 years of age. Overall, women accounted for a slightly higher percentage than their counterparts for both diseases. From details of treatments received that were extracted from the claims data, acupuncture treatment accounted for the highest percentage for both disorders. Moreover, 50.7% of the patients who visited Korean medicine institutions to treat the two diseases also visited conventional Western medicine institutions. These patients, who were diagnosed with their condition at a Korean medicine institution, visited a conventional institution and then returned; the conventional institutions were primarily used for examination (40.5%). Increased utilization of traditional Korean medicine services was confirmed among patients with LDH and/or LSS; in particular, a sharp increase was noted among patients with LSS. The results of this study will be useful as basic research data for clinicians, researchers, and policy makers.

Therapeutic effect of epidural dexamethasone palmitate in a rat model of lumbar spinal stenosis

BACKGROUND

Dexamethasone palmitate (DEP), a prodrug of dexamethasone (DEX), is a synthetic corticosteroid medication distinguished by the inclusion of a fatty acid component known as palmitate. This study introduces DEP as a novel therapeutic option for spinal epidural injection, aiming to provide safer and longer-lasting pain relief as an alternative to for patients with spinal stenosis.

METHODS

40 rats were randomly divided into four groups: those receiving epidural administration of normal saline (NS), and DEP in the lumbar spinal stenosis (LSS) model, and non-model rats receiving epidural NS administration. Paw withdrawal thresholds to mechanical stimulation and motor function (neurogenic intermittent claudication) were observed for up to 21 days. Hematology and blood chemistry analyses were performed 1 week after drug therapy. Tissue samples were collected for steroid pathology examination to evaluate adhesion degree, perineural area inflammation, and chromatolysis in the dorsal root ganglion (DRG), and adrenal gland.

RESULTS

The DEX and DEP groups demonstrated significant recovery from mechanical allodynia and motor dysfunction after 2 weeks of drug therapy (p<0.001). However, by the third week, the effect of DEX started to diminish while the effect of DEP persisted. Furthermore, the DEP group exhibited reduced fibrosis and less chromatolysis than the NS group. No steroid overdose or toxin was observed in any group.

CONCLUSION

The epidural administration of DEP demonstrated therapeutic efficacy in reducing allodynia and hyperalgesia resulting from chronic DRG compression, thus offering prolonged pain relief. These findings underscore the potential of DEP as a promising treatment alternative for pain associated with LSS, serving as a viable substitute for .

Lumbar foraminal stenosis was associated with back pain and leg pain: epidemiological evidence from a population-based cohort

OBJECTIVES

To determine the characteristics of lumbar foraminal stenosis (LFS) on magnetic resonance (MR) images and their association with back pain and radiating leg pain in a population-based sample of Chinese subjects.

METHODS

This study was an extension of the Hangzhou Lumbar Spine Study, a cross-sectional study focusing on back pain and lumbar spine MR imaging findings. Questionnaire data, including demographics, lifestyle, occupational exposures, back pain and radiating leg pain were included. On lumbar spine MR images, disc degeneration was assessed using Pfirrmann grade and Modic changes were evaluated. Using Lee's scale, the L3-S1 intervertebral foramina were evaluated, with grade 2-3 representing substantial LFS and grade 0-1 no LFS. Characteristics of LFS were noted, and associations of LFS with back pain and radiating leg pain were examined.

RESULTS

Among the 644 study subjects, 141 (21.9%) had at least one LFS, and its occurrence was associated with greater age (OR = 1.93 for each 10 years, p < 0.001). Substantial LFS was associated with the presence of back pain (OR = 1.92, p = 0.001) and the intensity of the worst back pain (Coef = 8.30, p < 0.001) over the past 12 months, and disabling back pain during their lifetime (OR = 2.25, p < 0.001). Substantial LFS was also associated with leg pain (OR = 14.27, p < 0.001), with a sensitivity of 75.7% for the presence of radiating leg pain and a specificity of 81.4%.

CONCLUSION

Substantial LFS on MR images was a common age-related degenerative phenotype in adults, and appears to be an independent risk factor for back pain and leg pain.

Longitudinal Analysis of the Care Pathway of Patients with Lumbar Spinal Stenosis in the US

Background

Evidence regarding the frequency and timing of treatment for lumbar spinal stenosis (LSS) fails to offer clear consensus. We describe the LSS care journey from initial diagnosis to first surgical intervention.

Methods

Using Medicare claims database from 2009 through 2020, we identified patients who were diagnosed with LSS. The use and timing of conservative and surgical treatments during the entire follow-up from the initial diagnosis were reported.

Results

Of the 143,849 patients identified, 68% received conservative care within 8.4 months and 25.3% received a surgical or minimally invasive intervention over 5.7 years following initial diagnosis, with 12.6% undergoing open decompression alone, 10.2% undergoing open decompression with fusion, and 5.1% undergoing fusion surgery alone. Fewer than 1% were provided with interspinous spacers or a percutaneous image-guided lumbar decompression.

Conclusion

Approximately three-quarters of patients in the study received no surgical or non-invasive interventions for approximately six years following diagnosis with LSS.

Causal relationships between anthropometric traits, bone mineral density, osteoarthritis and spinal stenosis: A Mendelian randomisation investigation

OBJECTIVE

Spinal stenosis is a common condition among older individuals, with significant morbidity attached. Little is known about its risk factors but degenerative conditions, such as osteoarthritis (OA) have been identified for their mechanistic role. This study aims to explore causal relationships between anthropometric risk factors, OA, and spinal stenosis using Mendelian randomisation (MR) techniques.

DESIGN

We applied two-sample MR to investigate the causal relationships between genetic liability for select risk factors and spinal stenosis. Next, we examined the genetic relationship between OA and spinal stenosis with linkage disequilibrium score regression and Causal Analysis Using Summary Effect estimates MR method. Finally, we used multivariable MR (MVMR) to explore whether OA and body mass index (BMI) mediate the causal pathways identified.

RESULTS

Our analysis revealed strong evidence for the effect of higher BMI (odds ratio [OR] = 1.54, 95%CI: 1.41-1.69, p-value = 2.7 × 10-21), waist (OR = 1.43, 95%CI: 1.15-1.79, p-value = 1.5 × 10-3) and hip (OR = 1.50, 95%CI: 1.27-1.78, p-value = 3.3 × 10-6) circumference on spinal stenosis. Strong evidence of causality was also observed for higher bone mineral density (BMD): total body (OR = 1.21, 95%CI: 1.12-1.29, p-value = 1.6 × 10-7), femoral neck (OR = 1.35, 95%CI: 1.09-1.37, p-value = 7.5×10-7), and lumbar spine (OR = 1.38, 95%CI: 1.25-1.52, p-value = 4.4 × 10-11). We detected high genetic correlations between spinal stenosis and OA (rg range: 0.47-0.66), with Causal Analysis Using Summary Effect estimates results supporting a causal effect of OA on spinal stenosis (ORallOA = 1.6, 95%CI: 1.41-1.79). Direct effects of BMI, BMD on spinal stenosis remained after adjusting for OA in the MVMR.

CONCLUSIONS

Genetic susceptibility to anthropometric risk factors, particularly higher BMI and BMD can increase the risk of spinal stenosis, independent of OA status. These results may inform preventative strategies and treatments.

The impact of nursing interventions on the rehabilitation outcome of patients after lumbar spine surgery

BACKGROUND

This study aimed to investigate the impact of nursing interventions on the rehabilitation outcomes of patients after lumbar spine surgery and to provide effective references for future postoperative care for patients undergoing lumbar spine surgery.

METHODS

The study included two groups: a control group receiving routine care and an observation group receiving additional comprehensive nursing care. The comprehensive care encompassed postoperative rehabilitation, pain, psychological, dietary management, and discharge planning. The Visual Analogue Scale (VAS), Oswestry Disability Index (ODI), Short-Form 36 (SF-36) Health Survey, self-rating depression scale (SDS) and self-rating anxiety scale(SAS) were used to assess physiological and psychological recovery. Blood albumin, haemoglobin, neutrophil counts, white blood cell counts, red blood cell counts, inflammatory markers (IL-6, IL-10, and IFN-γ) were measured, and the incidence of postoperative adverse reactions was also recorded.

RESULTS

Patients in the observation group exhibited significantly improved VAS, ODI, SF-36, SDS and SAS scores assessments post-intervention compared to the control group (P < 0.05). Moreover, levels of IL-6, IL-10, and IFN-γ were more favorable in the observation group post-intervention (P < 0.05), indicating a reduction in inflammatory response. There was no significant difference in the incidence of postoperative adverse reactions between the groups (P > 0.05), suggesting that the comprehensive nursing interventions did not increase the risk of adverse effects.

CONCLUSION

Comprehensive nursing interventions have a significant impact on the postoperative recovery outcomes of patients with LSS, alleviating pain, reducing inflammation levels, and improving the overall quality of patient recovery without increasing the patient burden. Therefore, in clinical practice, it is important to focus on comprehensive nursing interventions for patients with LSS to improve their recovery outcomes and quality of life.

Diabetes Mellitus and Poor Glycemic Control Are Associated With a Higher Risk of Lumbar Spinal Stenosis: An Analysis of a Large Nationwide Database

STUDY DESIGN

A large-scale retrospective case-control study.

OBJECTIVE

Examine diabetes as a risk factor for lumbar spinal stenosis (LSS) development and evaluate the impact of diabetes duration, glycemic control, and associated complications on this risk.

SUMMARY OF BACKGROUND DATA

Diabetes mellitus, a multiorgan disorder impacting various connective tissues, induces histological changes in spinal structures, particularly the ligamentum flavum. While clinical studies suggest a higher incidence of LSS in diabetic patients, substantial epidemiological research on the likelihood of LSS diagnosis in individuals with diabetes is scarce.

MATERIALS AND METHODS

Using nationwide data, a total of 49,576 patients diagnosed with LSS based on International Classification of Diseases-10 codes were matched with controls of the same number based on age and sex. Employing a multivariable logistic regression model, the study assessed for the association between spinal stenosis and diabetes, while adjusting for confounders.

RESULTS

We found a higher likelihood of LSS diagnosis in diabetic patients [odds ratio (OR) 1.39, 95% CI: 1.36 - 1.43, P <0.001]. Those with hemoglobin A1c ≥7% and ≥1 diabetes-related complication also had an elevated likelihood (OR: 1.19, 95% CI: 1.08-1.31, P =0.001). Prolonged diabetes exposure increased the risk. Diabetes diagnosis reduced median survival by around 4.5 years for both stenosis and nonstenosis patients; spinal stenosis diagnosis alone minimally impacted survival. Relative to individuals diagnosed with diabetes mellitus at the age of 65 or older, the OR for developing LSS were 1.22 (95% CI: 1.18-1.27, P <0.001) when DM was diagnosed at 50 to 65 years old and 1.67 (95% CI: 1.56-1.79, P <0.001) for those under 50 years old. Multivariate analysis revealed a significantly increased risk of all-cause mortality in patients with DM and spinal stenosis (hazard ratio: 1.36, 95% CI: 1.29-1.44, P <0.001) and those with DM without stenosis (hazard ratio: 1.49, 95% CI: 1.41-1.57, P <0.001) compared with controls.

CONCLUSIONS

Diabetic patients with prolonged disease, poor glycemic control, and diabetes-related complications face an elevated risk of developing LSS. Recognizing the reciprocal adverse relationship between these conditions is crucial in clinical practice and designing public health measures for managing both conditions.

LEVEL OF EVIDENCE

4.

Diagnostic and prognostic significance of miR-486-5p in patients who underwent minimally invasive surgery for lumbar spinal stenosis

BACKGROUND

This study aimed to investigate the expression and clinical value of microRNA miR-486-5p in diagnosing lumbar spinal stenosis (LSS) patients and predicting the clinical outcomes after minimally invasive spinal surgery (MISS) in LSS patients, and the correlation of miR-486-5p with inflammatory responses in LSS patients.

METHODS

This study included 52 LSS patients, 46 patients with lumbar intervertebral disk herniation (LDH) and 42 healthy controls. Reverse transcription quantitative PCR was used to detect miR-486-5p expression. The ability of miR-486-5p to discriminate between different groups was evaluated by receiver-operating characteristic analysis. The visual analogue scale (VAS), Oswestry Disability Index (ODI) and Japanese Orthopaedic Association (JOA) scores at 6 months postoperatively were used to reflect the clinical outcomes of LSS patients. Enzyme-linked immunosorbent assay was used to measure the levels of inflammatory factor [interleukin-1β (IL-1β) and tumor necrosis factor-α (TNF-α)]. The correlation of miR-486-5p with continuous variables in LSS patients was evaluated by the Pearson correlation coefficient.

RESULTS

Expression of serum miR-486-5p was upregulated in LSS patients and had high diagnostic value to screen LSS patients. In addition, serum miR-486-5p could predict the 6-month clinical outcomes after MISS therapy in LSS patients. Moreover, serum miR-486-5p was found to be positively correlated with the levels of IL-1β and TNF-α in patients with LSS.

CONCLUSION

miR-486-5p, increased in LSS patients, can function as an indicator to diagnose LSS and a predictive indicator for the clinical outcomes after MISS therapy in LSS patients. In addition, miR-486-5p may regulate LSS progression by modulating inflammatory responses.

Effects of calcitonin on lumbar spinal stenosis

STUDY DESIGN

Systematic review and meta-analysis.

OBJECTIVE

There is some controversy about the effects of calcitonin (CT) on lumbar spinal stenosis (LSS). This systematic review and meta-analysis is to assess the strength of the evidence supporting the use of CT in the treatment of patients with LSS.

MATERIAL AND METHOD

We performed an electronic search depicting randomized controlled trials (RCTs) through 4 databases from the date of database creation to January 2023. 3 different researchers conducted independent literature screening, data extractions, and quality assessments. The outcome measures included visual analogue scale (VAS), walking distance, and oswestry disability index (ODI). Meta-analysis and trial sequence analysis (TSA) were carried out using RevMan 5.4, Stata 16.0, and TSA 0.9. GRADE 3.6 was used to evaluate the evidence quality.

RESULTS

We accepted 9 studies with 496 participants. The meta-analysis revealed that CT offered no significant improvement in VAS, walking distance, or ODI in patients with LSS.

CONCLUSION

There is no evidence that CT has a benefit in patients with LSS, either alone or in combination with other treatments, or depending on the route of administration, according to the systematic review and meta-analysis of relevant RCTs.

A propensity-matched study of patients with symptomatic lumbar spinal stenosis opting for surgery versus not

Introduction

Although most surgeons treating patients with lumbar spinal stenosis (LSS) believe that surgical treatment is superior to conservative measures, systematics reviews have concluded that no solid evidence support this.

Research question

To compare change at 1-year of walking ability, health-related quality of life, leg and back pain in patients with symptomatic LSS referred to a spine surgery clinic who opted for surgery and those who did not.

Material and methods

The study included 149 operated and 149 non-operated patients seen by spine surgeons and diagnosed with LSS. The non-operated patients were propensity-matched to a cohort retrieved from the Danish national spine registry. Matching was done on demographics and baseline outcome measures. The outcomes was walking improvement measured by item 4 of the Oswestry Disability Index, EQ-5D-3L, global assessment (GA) of back/leg pain, back and leg pain on the Visual Analogue Scale and the Short Form 36 transition item 2.

Results

Less than half of the non-operated reached MCID on EQ-5D-3L, VAS pain legs or VAS pain back where 2/3 of the operated did. The largest difference was VAS back pain where 27.5% of the non-operated reached an MCID of 12 points compared to 71.8% in the operated group.

Discussion and conclusion

Surgical treated patients improved better than non-operated on all outcome measures. However, further research is required to compare the effectiveness of surgical decompression with non-operative care for LSS patients.

Characterizing utilization patterns and reoperation risk factors of interspinous process devices: analysis of a national claims database

INTRODUCTION

Interspinous process devices (IPDs) were developed as minimally invasive alternatives to open decompression surgery for spinal stenosis. However, given high treatment failure and reoperation rates, there has been minimal adoption by spine surgeons. This study leveraged a national claims database to characterize national IPD usage patterns and postoperative outcomes after IPD implantation.

METHOD

Using the PearlDiver database, we identified all patients who underwent 1- or 2-level IPD implantation between 2010 and 2018. Univariate and multivariable logistic regression was performed to identify predictors of the number of IPD levels implanted and reoperation up to 3 years after the index surgery. Right-censored Kaplan-Meier curves were plotted for duration of reoperation-free survival and compared with log-rank tests.

RESULTS

Patients (n = 4865) received 1-level (n = 3246) or 2-level (n = 1619) IPDs. Patients who were older (adjusted odds ratio [aOR] 1.02, 95% confidence interval [CI] 1.01-1.03, P < .001), male (aOR 1.31, 95% CI 116-1.50, P < .001), and obese (aOR 1.19, 95% CI 1.05-1.36, P < .01) were significantly more likely to receive a 2-level IPD than to receive a 1-level IPD. The 3-year reoperation rate was 9.3% of patients when mortality was accounted for during the follow-up period. Older age decreased (aOR 0.97, 95% CI 0.97-0.99, P = .0039) likelihood of reoperation, whereas 1-level IPD (aOR 1.37, 95% CI 1.01-1.89, P = .048), Charlson Comorbidity Index (aOR 1.07, 95% CI 1.01-1.14, P = .018), and performing concomitant open decompression increased the likelihood of reoperation (aOR 1.68, 95% CI 1.35-2.09, P = .0014).

CONCLUSION

Compared with 1-level IPDs, 2-level IPDs were implanted more frequently in older, male, and obese patients. The 3-year reoperation rate was 9.3%. Concomitant open decompression with IPD placement was identified as a significant risk factor for subsequent reoperation and warrants future investigation.

Long term postoperative results and quality of life after surgery for lumbar spinal stenosis in sub-sahara African countries, the case of Cameroon: A cross-sectional study

Objectives

Lumbar spinal stenosis is a frequent and disabling disease of the elderly. However, the impact of its surgery on the long term (≥5 years) postoperative results and quality of life has not yet been evaluated in our setting.

Methods

The study population consisted of 224 patients operated between 2010 and 2017 at the Yaounde Central Hospital and the Yaounde General Hospital, of whom 33 were evaluated. Long term postoperative results were defined as reoperations, indication for reoperation, time elapsed to reoperation and control-X ray findings. Quality of life (QOL) was evaluated using the Oswestry Disability Index (ODI) and Numerical Pain Rating Scale (NRS), and compared to reported preoperative values. The one-way analysis of variance and Kruskal-Wallis tests were used for associations between patient characteristics and quality of life outcomes.

Results

Participants had a mean age of 57.3 years. 21% of participants were reoperated at least once, two years later on average due to reappearance of their clinical pictures. QOL significantly improved from being crippled (mean ODI 67.5%) and having severe pain (mean NRS 8) before surgery, to moderate disability (mean ODI 34.4%, p < 0.01) and moderate pain (means NRS 4, p < 0.01) five years later. Having large family support was the only factor independently associated with improved ODI and NRS (p = 0.01).

Conclusion

Lumbar spinal stenosis surgery is still beneficial five years later. Large cohort studies need to be conducted in our setting.

Patient and physician radiation exposure during minimally invasive lumbar decompression: A prospective assessment of X-ray exposure risks

INTRODUCTION

Minimally invasive lumbar decompression (mild®) is becoming a popular procedure for treating lumbar spinal stenosis (LSS) secondary to hypertrophic ligamentum flavum (LF). The mild® procedure is commonly performed under live fluoroscopic guidance and carries a risk of radiation exposure to the patient and healthcare.

METHODS

One physician performed mild® on 41 patients at the Cleveland Clinic Department of Pain Management from October 2019 to December 2021, while wearing a radiation exposure monitor (Mirion Technologies). Mean fluoroscopy time, mean exposure per case, and mean exposure per unilateral level decompressed were the primary outcomes measured. The secondary outcome was to provide a comparison of radiation exposure during similar fluoroscopically guided procedures.

RESULTS

Mean patient fluoroscopy exposure time was 2.1 min ±0.9 (range: 1.1-5.6) fluoroscopy time per unilateral level decompressed. The mean patient radiation skin exposure from mild® was 1.1 ± 0.9 mGym2, and the mean total dose was 142.3 ± 108.6 mGy per procedure. On average, the physician was exposed to an average deep tissue exposure of 4.1 ± 3.2 mRem, 2.9 ± 2.2 mRem estimated eye exposure, and 14.7 ± 11.0 mRem shallow tissue exposure per unilateral level decompressed. An individual physician would exceed the annual exposure limit of 5 Rem after approximately 610 mild® procedures per year.

CONCLUSIONS

This study is an attempt to quantify the radiation exposure to the physician and patient during the mild® procedure. Compared with other fluoroscopically guided pain management procedures, patient and physician radiation exposure during mild® was low.

Incidence of subsequent surgical decompression following minimally invasive approaches to treat lumbar spinal stenosis: A retrospective review

BACKGROUND CONTEXT

Surgical decompression is the definitive treatment for managing symptomatic lumbar spinal stenosis; however, select patients are poor surgical candidates. Consequently, minimally invasive procedures have gained popularity, but there exists the potential for failure of therapy necessitating eventual surgical decompression.

PURPOSE

To evaluate the incidence and characteristics of patients who require surgical decompression following minimally invasive procedures to treat lumbar spinal stenosis.

STUDY DESIGN/SETTING

Retrospective review.

PATIENT SAMPLE

Patients who underwent minimally invasive procedures for lumbar spinal stenosis (Percutaneous Image-guided Lumbar Decompression [PILD] or interspinous spacer device [ISD]) and progressed to subsequent surgical decompression within 5 years.

OUTCOME MEASURES

The primary outcome was the rate of surgical decompression within 5 years following the minimally invasive approach. Secondary outcomes included demographic and comorbid factors associated with increased odds of requiring subsequent surgery.

METHODS

Patient data were collected using the PearlDiver-Mariner database. The rate of subsequent decompression was described as a percentage while univariable and multivariable regression analysis was used for the analysis of predictors.

RESULTS

A total of 5278 patients were included, of which 3222 (61.04%) underwent PILD, 1959 (37.12%) underwent ISD placement, and 97 (1.84%) had claims for both procedures. Overall, the incidence of subsequent surgical decompression within 5 years was 6.56% (346 of 5278 patients). Variables associated with a significantly greater odds ratio (OR) [95% confidence interval (CI)] of requiring subsequent surgical decompression included male gender and a prior history of surgical decompression by 1.42 ([1.14, 1.77], p = 0.002) and 2.10 times ([1.39, 3.17], p < 0.001), respectively. In contrast, age 65 years and above, a diagnosis of obesity, and a Charlson Comorbidity Index score of three or greater were associated with a significantly reduced OR [95% CI] by 0.64 ([0.50, 0.81], p < 0.001), 0.62 ([0.48, 0.81], p < 0.001), and 0.71 times ([0.56, 0.91], p = 0.007), respectively.

CONCLUSIONS

Minimally invasive procedures may provide an additional option to treat symptomatic lumbar spinal stenosis in patients who are poor surgical candidates or who do not desire open decompression; however, there still exists a subset of patients who will require subsequent surgical decompression. Factors such as gender and prior surgical decompression increase the likelihood of subsequent surgery, while older age, obesity, and a higher Charlson Comorbidity Index score reduce it. These findings aid in selecting suitable surgical candidates for better outcomes in the elderly population with lumbar spinal stenosis.

Is Minimally Invasive Spinal Surgery Superior to Endoscopic Spine Surgery in Postoperative Radiologic Outcomes of Lumbar Spine Degenerative Disease? A Systematic Review

BACKGROUND

 Minimally invasive spinal surgery (ESS) are both well-established surgical techniques for lumbar spinal stenosis; however, there is limited literature comparing the efficacy of the two techniques with respect to radiologic decompression data.

METHODS

 In this review, PubMed, Google Scholar, and Scopus databases were systematically searched from inception until July 2022 for studies that reported the radiologic outcomes of endoscopic and minimally invasive approaches for decompressive spinal surgery, namely, the spinal canal area, neural foraminal area, and neural foraminal heights.

RESULTS

 Of the 378 articles initially retrieved using MeSH and keyword search, 9 studies reporting preoperative and postoperative spinal areas and foraminal areas and heights were finally included in our review. Of the total 581 patients, 391 (67.30%) underwent MISS and 190 (32.70%) underwent ESS. The weighted mean difference between the spinal canal diameter in pre- and postoperative conditions was 56.64 ± 7.11 and 79.52 ± 21.31 mm2 in the MISS and ESS groups, respectively. ESS was also associated with a higher mean difference in the foraminal area postoperatively (72 ± 1 vs. 35.81 ± 11.3 mm2 in the MISS and ESS groups, respectively), but it was comparable to MISS in terms of the foraminal height (0.32 ± 0.037 vs. 0.29 ± 0.03 cm in the MISS and endoscopic groups, respectively).

CONCLUSIONS

 Compared with MISS, ESS was associated with improved radiologic parameters, including spinal canal area and neural foraminal area in the lumbar spinal segments. Both techniques led to the same endpoint of neural decompression when starting with a more severe compression. However, the present data do not allow the correlation of the radiographic results with the related clinical outcomes.

Efficacy and Safety of the Extreme Lateral Interbody Fusion (XLIF) Technique in Spine Surgery: Meta-Analysis of 1409 Patients

(1) Objectives: The objective of this study was to quantify the exact clinical-radiological efficacy and safety of the extreme lateral interbody fusion (XLIF) technique in spinal surgery; (2) Methods: A meta-analysis was performed using PubMed, Embase, Scopus, and Cochrane Collaboration Library. Studies focusing on patients surgically treated with XLIF were included. The outcomes were as follows: visual analog scale (VAS) and Oswestry disability index (ODI), radiological outcomes, and adverse events. Cohort studies and case series were also included. Clinical outcomes were assessed at 12 months of age. Data were combined using Review Manager 5.4 and WebPlotDigitizer 13.1.4; (3) Results: Nineteen studies with a pool of 1409 patients were included in this meta-analysis. Leg pain VAS and back pain VAS significantly improved at 12 months (SMD 2.75, 95% CI 0.59-4.90; SMD 4.54, 95% CI 1.39-7.69). ODI showed significant improvement (MD 32.51, 95% CI 24.01-41.00) at 12 months. Disc height increased significantly (SMD -2.73, 95% CI -3.58 to -1.88). Lumbar lordosis and segmental lordosis were significantly corrected postoperatively (MD -2.44, 95% CI -3.45 to -1.43; MD -2.55, 95% CI -3.61 to -1.48). The fusion rates at 12 months ranged from 85.0% to 93.3%. The most frequent complications were transient neurological conditions (2.2%), hardware failure (1.9%), and transient pain (1.8%). The most frequent serious complications were nerve root injury (1.0%), gastrointestinal impairment (0.7%), and vertebral fractures (0.6%); (4) Conclusions: This is the first meta-analysis of the specific use of XLIF in spinal surgery. This study demonstrates that the XLIF technique in spine surgery is associated with good clinical and radiological results and a low complication rate.

Minimal clinically important differences in walking capacity and physical activity after nonsurgical treatment in patients with lumbar spinal stenosis: a secondary analysis of a randomized controlled trial

BACKGROUND CONTEXT

Little information is available about the minimal clinically important differences (MCIDs) for objective physical measurements in people with lumbar spinal stenosis (LSS).

PURPOSE

To use disorder-specific anchor and, multiple anchor-, and distribution-based approaches to determine the MCIDs for walking capacity and physical activity in patients with LSS receiving nonsurgical treatment.

STUDY DESIGN/SETTING

Secondary analysis of a randomized controlled trial.

PATIENT SAMPLE

Sixty-nine patients with neurogenic claudication caused by LSS receiving outpatient physical therapy.

OUTCOME MEASURES

Zurich claudication questionnaire (ZCQ), self-paced walking test (SPWT), and number of daily steps measured by pedometry.

METHODS

All patients completed the ZCQ, SPWT, and pedometry at the baseline and after 6 weeks. For the anchor-based approach, ZCQ symptom severity, physical function, and satisfaction subscales were used as the external anchors. Using the receiver-operating characteristic (ROC) curve, the MCIDs were determined based on the optimal cutoff points for changes in the SPWT or daily steps. For the distribution-based approach, the MCIDs were estimated from the standard deviations (SDs) of the baseline scores of the SPWT and daily steps.

RESULTS

In the anchor-based approach, only the ZCQ satisfaction subscale for the SPWT (0.73), and ZCQ symptom severity subscale for daily steps (0.71) exceeded the area under the ROC curve value of 0.7, which is considered acceptable. When using these subscales as anchors, the ROC curves and optimal cutoff points indicated MCIDs of 151 m for the SPWT and 1,149 steps for daily steps. The distribution-based approach estimated the MCIDs as 280 m for the SPWT and 1,274 steps for daily steps, and had a moderate effect size (0.5 SD).

CONCLUSIONS

The anchor-based approach had limited external responsiveness when the ZCQ was used as the anchor. However, this information may be helpful for interpreting walking capacity and physical activity in patients with LSS receiving nonsurgical treatment and for estimating power and sample size when planning new trials.

Comparison analysis of safety outcomes and the rate of subsequent spinal procedures between interspinous spacer without decompression versus minimally invasive lumbar decompression

INTRODUCTION

Treatment for degenerative lumbar spinal stenosis (LSS) typically begins with conservative care and progresses to minimally invasive procedures, including interspinous spacer without decompression or fusion (ISD) or minimally invasive lumbar decompression (MILD). This study examined safety outcomes and the rate of subsequent spinal procedures among LSS patients receiving an ISD versus MILD as the first surgical intervention.

METHODS

100% Medicare Standard Analytical Files were used to identify patients with an ISD or MILD (first procedure=index date) from 2017 to 2021. ISD and MILD patients were matched 1:1 using propensity score matching based on demographics and clinical characteristics. Safety outcomes and subsequent spinal procedures were captured from index date until end of follow-up. Cox models were used to analyze rates of subsequent surgical interventions, LSS-related interventions, open decompression, fusion, ISD, and MILD. Cox models were used to assess postoperative complications during follow-up and logistic regression to analyze life-threatening complications within 30 days of index procedure.

RESULTS

A total of 3682 ISD and 5499 MILD patients were identified. After matching, 3614 from each group were included in the analysis (mean age=74 years, mean follow-up=20.0 months). The risk of undergoing any intervention, LSS-related intervention, open decompression, and MILD were 21%, 28%, 21%, and 81% lower among ISD compared with MILD patients. Multivariate analyses showed no significant differences in the risk of undergoing fusion or ISD, experiencing postoperative complications, or life-threatening complications (all p≥0.241) between the cohorts.

CONCLUSIONS

These results showed ISD and MILD procedures have an equivalent safety profile. However, ISDs demonstrated lower rates of open decompression and MILD.