Spondylolisthesis Patients Research Articles

Comparison of the Biomechanical Effect of the FFX Device Compared With Other Lumbar Fusion Devices: A Finite Element Study.

Lumbar decompression can result in postsurgical instability and spondylolisthesis in patients with lumbar spinal stenosis (LSS). While pedicle screw (PS) constructs improve stability and support fusion, their use can lead to adjacent level degeneration due to rigidity and resultant overload of anatomical structures. The FFX device is a facet spacer designed to be a less invasive alternative for obtaining fusion compared with PS. The present study aimed to compare biomechanical performance of the FFX device to different lumbar spine procedures using the finite element (FE) method. Comparative biomechanical study by FE method. An FE model for the lumbar spine was developed and validated to assess vertebral displacement and stress variations in the facet joints and discs following surgery. Modeled scenarios included a healthy spine as a reference model, laminectomy (LAM), and prior to/following L4-L5 fusion for LAM + FFX and LAM + PS. LAM increased displacement compared with the healthy spine and both instrumented spine procedures. Facet joint stress at adjacent levels for LAM + PS was significantly higher than with LAM + FFX prior to fusion (+13.5% for L3-L4; +15.7% for L5-S1). Adjacent level disc stress at L5-S1 was 7.7% higher for LAM + PS vs LAM + FFX. Adjacent level facet joint and disc stresses for LAM + FFX were equivalent to LAM + PS once fusion occurred. Instrumented spine fixation prevents the risk of lumbar instability associated with LAM alone. Compared with PS, the FFX device is a less invasive alternative for the treatment of LSS, which potentially lowers the risk of adjacent segment degeneration prior to fusion that provides equivalent stability once fusion is achieved.

Comparing Patient-Reported Outcomes in Patients Undergoing Lumbar Fusion for Isthmic Spondylolisthesis with Predominant Back Pain versus Predominant Leg Pain Symptoms

To compare patient-reported outcome measures (PROMs) and minimum clinically important difference (MCID) achievement following anterior or transforaminal lumbar interbody fusion for isthmic spondylolisthesis in patients presenting with predominant back pain versus predominant leg pain symptoms. A single-surgeon database was reviewed for anterior or transforaminal lumbar interbody fusion procedures for isthmic spondylolisthesis. Patient demographics, perioperative characteristics, postoperative complications, and PROMs were collected. Demographic/perioperative characteristics were compared among groups using χ2 and Student t tests for categorical and continuous variables, respectively. Mean PROM scores were compared using an unpaired Student t test. Postoperative improvement from preoperative baseline within each cohort was assessed with paired-samples t test. MCID achievement rates were compared with χ2 analysis. In total, 143 patients were included with 65 patients in the predominant back pain and 78 patients in the predominant leg pain cohort. Preoperative visual analog scale (VAS) leg was noted to be significantly greater in predominant leg pain cohort (P < 0.001). Cohorts demonstrated significant mean postoperative differences for the following PROMs at the following postoperative time points: significant differences were noted between cohorts for rate of achievement of MCID for the following PROMs at the following time points: VAS back at 2 years and VAS leg at 6 weeks/12 weeks/6 months/overall (P < 0.036, all). Compared with patients presenting for surgery with predominant leg pain symptoms, patients undergoing lumbar fusion at L4-L5 and L5-S1 for isthmic spondylolisthesis with predominant back pain symptoms may demonstrate improved long-term clinical outcomes for reported back pain, leg pain, and disability and reduced postoperative length of stay and narcotic consumption.

Magnetic Resonance Imaging Proxies for Segmental Instability in Degenerative Lumbar Spondylolisthesis Patients.

Retrospective cohort study. The aim was to investigate whether findings on magnetic resonance imaging (MRI) can be proxies (MRIPs) for segmental instability in patients with degenerative lumbar spinal stenosis (LSS) and/or degenerative spondylolisthesis (LDS) L4/L5. LDS has a heterogeneous nature. Some patients have a dynamic component of segmental instability associated with LDS. Studies have shown that MRI can show signs of instability. Patients with LSS or LDS at L4/L5 undergoing decompressive surgery±fusion from 2010 to 2017, with preoperative standing lateral spine radiographs and supine lumbar MRI and enrolled in Danish national spine surgical database, DaneSpine. Instability defined as slip of >3mm on radiographs. Patients divided into two groups based upon presence of instability. Outcome measures: radiograph: sagittal slip (mm). MRIPs for instability: sagittal slip >3mm, facet joint angle (°), facet joint effusion (mm), disk height index (%), and presence of vacuum phenomena. Optimal thresholds for MRIPs was determined by receiver operating characteristic (ROC) curves and area under the curve (AUC). Logistic regression to investigate association between instability and MRIPs. Two hundred thirty-two patients: 47 stable group and 185 unstable group. The two groups were comparable with regard to baseline patient-reported outcome measures. Thresholds for MRIPs: bilateral facet joint angle ≥46°; bilateral facet effusion ≥1.5mm and disk height index ≥13%. Logistic regression showed statistically significant association with MRIPs except vacuum phenomena, ROC curve AUC of 0.951. By absence of slip on MRI logistic regression showed statistically significant association between instability on radiograph and the remaining MRIPs, ROC curve AUC 0.757. Presence of MRIPs for instability showed statistically significant association with instability and excellent ability to predict instability on standing radiograph in LSS and LDS patients. Even in the absence of slip on MRI the MRIPs had a good ability to discriminate presence of instability.

Degenerative Lumbar Spondylolisthesis Patients With Movement-related Low Back Pain Have Less Postoperative Satisfaction After Decompression Alone.

Retrospective analysis of prospectively collected multicenter observational data. The aim was to examine the preoperative factors affecting postoperative satisfaction following posterior lumbar interbody fusion (PLIF) and microendoscopic muscle-preserving interlaminar decompression (ME-MILD) in patients with degenerative lumbar spondylolisthesis (DLS). The technique involved in DLS surgery may either be decompression alone or decompression-fixation. Poor performance may occur after either of these surgical treatments. The author hypothesized that evaluating the correlation between preoperative quality of life and postoperative performance would aid in determining the optimal procedure. This study included 138 patients who underwent surgery for 1-level mild DLS. The authors performed PLIF for 79 patients and ME-MILD for 59 patients. When the satisfaction subscale of the Zurich Claudication Questionnaire exceeded 2 points, postoperative satisfaction was considered poor. The clinical characteristics were investigated. Responses to preoperative health-related quality of life questionnaires, such as the Japanese Orthopedic Association Back Pain Evaluation Questionnaire (JOABPEQ), short form-36 health survey (SF-36), and visual analog scale, were compared between the satisfied and unsatisfied groups. In the PLIF group, no endogenous factors influenced postoperative satisfaction. The ME-MILD cohort's satisfied and unsatisfied patients differed significantly in terms of preoperative lumbar spine dysfunction ( P <0.001) items of the JOABPEQ, role physical ( P =0.03), and role emotional ( P =0.03) items of the SF-36. A strong correlation ( r =-0.609 P =0.015) was found between preoperative lumbar spine dysfunction and postoperative satisfaction. In the ME-MILD group, preoperative lumbar spine function was correlated with postoperative satisfaction. Decompression alone may be ineffective in cases with decreased lumbar spine function prior to surgery. The degree of low back pain on movement should be considered before selecting the surgical method. 3.

Postural stability, body composition and functional ability of the lower extremity in patients with lumbar degenerative spondylolisthesis

Although patients accessing rehabilitation services had been reported to have better functional ability of the lower limbs, postural stability, and low cardiovascular disease risk factors, updated data from developing countries is however vital for clinical practices. Hence, the aim of this study was to present the association between lower extremity functional ability (LEFA), stability, and body composition profiles in rehabilitative lumbar degenerative spondylolisthesis (LDS) patients considering age and gender. One hundred and twenty-four participants (45 females, 79 males), with a mean age of 56.45±11.13 years, volunteered for the study. Weight, height body fat percent (BFP), visceral fat, body mass index (BMI), resting systolic and diastolic blood pressure, and resting heart rate were measured while functional ability and stability tests were conducted on the participants. 53.4% were at least overweight; LEFA was below average, stability of both dominant and nondominant legs was very poor, blood pressure and heart rate were high. Women had high total body fat and visceral fat. Significant differences were observed in BMI (p=0.044) and BFP (p=0.035) based on age classification as well as BMI (p=0.000), BFP (p=0.000) and visceral fat (p=0.000) by gender. Overweight, high blood pressure, poor LEFA, and postural stability are crucial comorbidities of Ghanaian LDS patients in this study. Educationally and pragmatically comprehensive healthy lifestyle interventions of regular exercise regimes, adequate and quality nutrition, and occupational stress reduction would play major complementary roles in chiropractic treatment.

What's New in Spine Surgery.

What's New in Spine Surgery.

Functional outcomes are preserved in adult acetabular dysplasia with radiographic evidence of lumbosacral spine anomalies: an investigation in hip-spine syndrome

PurposeAcetabular dysplasia (AD) is a debilitating condition which results in impaired hip function, leading to hip-spine syndrome with anomalies identifiable on plain radiographs. However, no study to date has investigated the association between radiographic spine anomalies and functional outcomes in AD. We hypothesize that AD patients with radiographic evidence of lumbar spine anomalies are associated with decreased function in comparison to those without such radiographic findings.Patients and methodsOne hundred thirty-five hips underwent a full four-view hip radiograph series, and two observers analyzed hip and spine variables using standard radiographs and obtained Castellvi grade, assessment of spondylolisthesis, and L4-S1 interpedicular distance. A comprehensive hip questionnaire was administered which included Harris Hip Score (HHS) and Hip Disability and Osteoarthritis Outcome Score (HOOS) to assess patient function. Correlations between HHS and HOOS and radiographic spinal measurements were calculated, and p-values were corrected for multiple comparison using the Holm’s method.ResultsOut of 135 patients, 119 were female (88.1%) and 16 were male (11.9%). Average age of presentation was 34.2 years, and average BMI was 26. There was no statistically significant correlation between Castellvi grade, presence of spondylolisthesis, or L4-S1 interpedicular distance and the patient-reported outcome measures HHS or HOOS. Conversely, a significant correlation was observed between Femoro-Epiphyseal Acetabular Roof (FEAR) index and HOOS of the contralateral hip (correlation coefficient = 0.38, adjusted p = 0.03) and Tönnis angle of AD severity and HHS of the contralateral hip (correlation coefficient = − 0.33, adjusted p = 0.04).ConclusionSeverity of spinal anomalies measured by Castellvi grade and spondylolisthesis in patients with AD was not associated with decreased patient function in the ipsilateral diseased hip. To our knowledge, this is the first study to date to report the relationship between radiographically identifiable lumbosacral abnormalities and hip function in AD.

Large Lumbar Lordosis and Coronal Deformity Angular Ratio Are Risk Factors for Adolescent Idiopathic Scoliosis in Patients With Lumbar Spondylolysis

The features of lumbar curves in patients with lumbar spondylolisthesis (LS) are unclear. The aim of this retrospective study was to present the clinical and radiologic characteristics of scoliosis due to LS and LS concurrent with main thoracolumbar/lumbar adolescent idiopathic scoliosis (AIS). This study was conducted as a single-center retrospective comparative study on 56 pediatric spondylolisthesis patients with main thoracolumbar/lumbar curves. Cases were divided into 2 groups according to the course of scoliosis after spinal surgery of LS. Sagittal spinopelvic parameters and scoliotic characteristics were compared between the 2 groups. The prevalence of scoliosis was 15.3% in pediatric LS patients in our study population. Lumbar lordosis (LL), Cobb angle, apical rotation, and coronal deformity angular ratio (C-DAR) were higher in the LS concurrent with AIS group than in the LS with functional scoliosis group (P < 0.05), while curve span, apical vertebral translation, and central sacral vertical line to C7 plumb line were lower (P < 0.05). Logistic regression analyses and receiver operating characteristic curves showed that LL and C-DAR were significant risk factors of unresolved lumbar curves after spinal surgery for LS, with a cutoff value of 51.5°and 3.5, respectively. Lumbar scoliosis may develop due to LS, or a concurrent condition to LS. LL and C-DAR are the features that differentiate AIS from functional scoliosis in patients with LS.

Scoliosis in dysplastic spondylolisthesis: a clinical survey of 50 young patients

BackgroundDysplastic spondylolisthesis is a rare spinal deformity that occurs mainly in young patients. Although its sagittal parameters had been well stated, coronal abnormalities in these patients were poorly studied. The purposes of this study were: (1) to investigate the prevalence of scoliosis in dysplastic spondylolisthesis;(2) to assess scoliosis resolution or persistence after surgery; and (3) to propose a modified classification of scoliosis associated with dysplastic spondylolisthesis.MethodsFifty patients (average age 14.9 ± 5.6 years) diagnosed with dysplastic spondylolisthesis who underwent surgical treatment were followed up and their data were analyzed. Standing posteroanterior and lateral full spine radiographs were used to measure the coronal and sagittal parameters. Patients with scoliosis, which was defined as a coronal Cobb angle greater than 10°, were divided into three groups according to their curve characteristics: “independent” scoliosis (IS) group, spasm scoliosis (SS) group, and olisthetic scoliosis (OS) group. SS and OS were spondylolisthesis-induced scoliosis. The radiographic parameters and patient-reported outcomes were collected before and after surgery and compared between groups.ResultsThe average slip percentage was 62.8% ± 23.1% and the average follow-up time was 51.5 ± 36.4 months (range 3–168 months). Twenty-eight of the 50 (56%) dysplastic spondylolisthesis patients showed scoliosis, of which 8 were IS (24.7° ± 15.2°), 11 were SS (13.9° ± 3.0°), and 9 were OS (12.9° ± 1.9°). By the last follow-up, no scoliosis resolution was observed in the IS group whereas all SS patients were relieved. Of the nine patients with OS, four (44.4%) had scoliosis resolution after surgery.ConclusionDistinguishing different types of scoliosis in dysplastic spondylolisthesis patients may help surgeons to plan treatment and understand prognosis. For patients with significant scoliosis, whether “independent” or spondylolisthesis-induced, treatment of spondylolisthesis should be performed first and scoliosis should be observed for a period of time and treated according to the corresponding principles.

THE ROLE OF DYNAMIC LUMBAR SPINE X-RAY IN THE DIAGNOSIS OF TYPE 1 SPONDYLOLISTHESIS IN PATIENTS WHO HAVE PREVIOUSLY DONE LUMBAR SPINAL SURGERY.

Objective: To determine the role of dynamic lumbar spine x-ray in the diagnosis of type 1 spondylolisthesis in patients who have previously done lumbar spinal surgery.&#x0D; Materials and Methods: The study was carried out at neurosurgery department, Lady Reading Hospital Peshawar, KPK from July 2015 to June 2017. He study employed prospective observational) study and a total of 1440 patients were studied.&#x0D; Results: A total of 1440 patients were studied in which 974 (67.7%) were females and the remaining 464 (33.3%) were males. Mean age of the patients was between 20 to 50 years. These patients had underwent lumbar spinal surgery about 1 year ago for PIVD and Stenosis. Proper history was taken and relevant examination was done. These patients were suggested dynamic lumbar spinal x-ray .After dynamic lumbar spinal x-ray (flexion extension view) was done, it was revealed that around 672 (46.6 %) of the total 1440 patients had type 1 spondylolisthesis. This percentage of patients with type 1 spondylolisthesis is prove of how dynamic lumbar spinal x-ray plays a role in the diagnosis of type 1 spondylolisthesis in patients who have had underwent lumbar spinal surgery.&#x0D; Recommendation: Dynamic lumbar spinal x-ray is recommended as a standard technique in the diagnosis of type 1 spondylolisthesis in patients who had previously underwent lumbar spinal surgery.

Utility of the decubitus or the supine rather than the extension lateral radiograph in evaluating lumbar segmental instability.

To determine the superiority of decubitus and supine radiographs for the reduction of olisthesis instead of the extension radiograph, and the inconsistency of the CT scout view, 3D-reconstruction and MR image in evaluating segmental instability. A cohort of 154 low-grade lumbar degenerative spondylolisthesis patients with the average age of (60.9 ± 8.6) years were enrolled. Slip percentage was measured on the flexion, upright and extension radiographs, the decubitus lateral radiograph, CT scout view, the supine median sagittal 3D-reconstruction and MR image. The translational range of motion was calculated, and segmental instability was defined as translational motion ≥ 8%. The flexion radiograph showed higher slip percentage than upright radiograph (p < 0.001). The slip percentage of the MR image was lower than CT scout view (p = 0.003) and CT sagittal radiograph (p = 0.001) on the basis of statistical differences among three groups (p = 0.002). The slip percentage of the CT scout view, decubitus radiograph, and extension radiograph was statistically different (p = 0.01). The CT scout view and sagittal reconstruction had lower slip percentage than the extension radiograph (p = 0.042; p = 0.003, respectively). Both the flexion-supine and flexion-decubitus modality had larger translational motion than the flexion-extension modality (p = 0.007; p < 0.001, respectively). Many modalities and techniques are used to show the vertebral displacement and its possible change and any cane used in the daily practice. In this study, supine and decubitus lateral radiography have larger reduction of olisthesis than the extension radiograph. The flexion radiograph coupled with a supine or decubitus radiograph reveals greater mobility than the flexion-extension modality.

Spine Pathologies in Osteogenesis Imperfecta: A Review

Background. The scientific and clinical interest in the problems of osteogenesis imperfecta (OI) has grown in the last decade. However, the analysis of various variants of spinal pathologies in OI received insufficient attention.&#x0D; The study aimed to analyze the current literature on various variants of the spinal pathology in patients with OI. OI is a phenotypically and genetically heterogeneous group of hereditary bone dysplasias. The spine pathology in OI is represented by scoliosis, kyphoscoliosis, anomalies of the craniovertebral junction, instability of the segments and fractures of the vertebral bodies, spondylolysis, and spondylolisthesis. Scoliosis and kyphoscoliosis are the most common forms of spinal pathology. In severe forms and at age 6 years, the prevalence of scoliosis can reach 89%. The exact mechanism of scoliosis formation in patients with OI is complex and incompletely defined. Anomalies of the craniovertebral junction are recorded in 37% of patients with OI and are determined in all four types of OI. Clinical manifestations of the craniocervical junction pathology can vary from asymptomatic to compression of the brainstem, restriction of cerebrospinal fluid circulation, leading to hydrocephalus, syringomyelia, and cranial nerve damage. The pathology of the lumbosacral spine is represented by spondylolysis and spondylolisthesis generally in the L5S1 segment in 5.3%10.9% of cases. The clinical significance and natural course of spondylolysis and spondylolisthesis in patients with OI are not fully defined in the literature, and the information on surgical indications and methods is available only in rare case reports. The changes in the axial skeleton in OI can lead to significant functional disability, pain, and potentially life-threatening complications, such as radicular neurological deficit, decrease in the ventilation capacity of the lungs, and cardiorespiratory complications. The overall severity of OI remains the best criterion for predicting the development of secondary spinal pathology. Given the generalization and heterogeneity of OI, an individual and multidisciplinary approach is necessary when diagnosing and planning the treatment strategy for this group of patients.

Association of Fusion During Decompression in Degenerative Lumbar Spondylolisthesis Patients with Outcomes

Association of Fusion During Decompression in Degenerative Lumbar Spondylolisthesis Patients with Outcomes

Comparison of Spinal Alignment between XLIF, TLIF, PLIF, and PLF in the Treatment of Single Level Spondylolisthesis: A Retrospective Study

Background: Most lumbar spinal fusion procedures are performed to increase fusion potential, correct a deformity, and decompress spinal nerve roots. Nowadays, there are several spinal fusion techniques such as extreme lateral lumbar interbody fusion (XLIF), transforaminal lumbar interbody fusion (TLIF), posterior lumbar interbody fusion (PLIF), and posterolateral fusion (PLF). However, there are no studies directly comparing their capacity to alter lumbar lordosis, segmental lordosis, intervertebral disc height, foraminal height, and the grade of slip for treating single level spondylolisthesis in Thailand. Objective: To compare which lumbar interbody technique amongst XLIF, TLIF, PLIF, and PLF, is the most effective in restoring spinal alignment in cases such as lumbar lordosis, increased segmental lordosis, increased intervertebral disc height, increased foraminal height, and a reduced slip grade in spondylolisthesis patients. Materials and Methods: The medical records and radiographs of single level spondylolisthesis patients treated in Siriraj hospital between 2002 and 2017 were retrospectively reviewed. Clinical data and radiographic parameters such as lumbar lordosis, segmental lordosis, intervertebral disc height, foraminal height, and grade of slip, including preoperative and postoperative data were collected and analyzed. An inter-observer/ intra-observer reliability test for all parameters was also performed. Results: Two hundred forty patients including 192 females and 48 males with a mean age of 60.1 years were included in the present study. There was no statistically significant difference in demographic data except in younger patients in the PLF group and those with shorter length of stays in the XLIF group. The present study results indicated that there was a statistically significant increase in lumbar lordosis, increased foraminal height, and decreased slip grade in the XLIF group when compared to other three groups as TLIF, PLIF, and PLF. Conclusion: All spinal fusion techniques could improve lumbar spinal alignment, however, XLIF is superior to other procedures, especially in lumbar lordosis, foraminal height restoration, and slip grade. Keywords: Lumbar spondylolisthesis; Extreme lateral lumbar interbody fusion; Transforaminal lumbar interbody fusion; Posterior lumbar interbody fusion; Posterolateral fusion; Lumbar lordosis

The study of distance changes between lumbar bi-cortical pedicle screws and anterior large vessels in patients with lumbar spondylolisthesis

ObjectiveThis paper was a anatomical radiographic study of distance between lumbar bi-cortical pedicle screws (BPSs) and anterior large vessels (ALVs) in patients with lumbar spondylolisthesis, and to provide clinical basis for evaluating the safety of bi-cortical pedicle screw implantation during lumbar spondylolisthesis.MethodsComplete Computed tomography (CT) data of 104 patients with grade I lumbar spondylolisthesis (L4 52 and L5 52) and 107 non-spondylolisthesis patients (control group) were collected in this study. The distances between lumbar 4,5(L4,5) and sacrum 1(S1) BPSs and ALVs (abdominal aorta, inferior vena cava, left and right common iliac artery, internal and external iliac artery) were respectively measured at different transverse screw angles (TSAs) (L4:5°,10°; L5:10°,15°; S1:0°,5°,10°) and analyzed by SPSS (v25.0). There were three types of distances from the anterior vertebral cortex (AVC) to the ALVs (DAVC-ALV): DAVC-ALV N, DAVC-ALV ≥ 0.50 cm, and DAVC-ALV < 0.50 cm; these different distances represented non-contact, distant and close ALV respectively.ResultsWe calculated the incidences of screw tip contacting large vessels at different TSAs and provided the appropriate angle of screw implantation. In non-spondylolisthesis group, in L4, the appropriate left TSA was 5°, and the incidence of the close ALV was 4.62%. In S1, the appropriate left TSA was 0° and the incidence of the close ALV was 22.4%, while the appropriate right TSA was 10° and the incidence of the close ALV was 17.8%. In L4 spondylolisthesis group, in L4, the appropriate left TSA was 5°, and the incidence of the close ALV was 3.8%. In L5 spondylolisthesis group, in S1, the appropriate left TSA was 0° and the incidence of the close ALV was 19.2%, while the appropriate right TSA was 10° and the incidence of the close ALV was 21.2%. The use of BPS was not appropriate on the right side of L4 or on the either side of L5 both in spondylolisthesis and control group. In patients with lumbar 4 spondylolisthesis, the incidences of screw tip contacting large vessels were less than the control group in both L4 and 5. In patients with lumbar 5 spondylolisthesis, the incidences of screw tip contacting large vessels were less than the control group in L5, while there were no significant difference in S1.ConclusionIt is very important that considering the anatomical relationship between the AVC and the ALVs while planning BPSs. The use of BPS does not apply to every lumbar vertebra. In patients with lumbar spondylolisthesis and non-spondylolisthesis patients, the incidences of screw tip contacting large vessels are different.

P42. CT measurement of pelvic incidence in the evaluation of spondylolisthesis

<h3>BACKGROUND CONTEXT</h3> Pelvic incidence (PI) has been described as a parameter that may be a risk factor for lumbar spondylolisthesis. Studies have reported PI measurement is more precise in CT scans. Very limited studies have evaluated PI using CT scans in spondylolisthesis patients. <h3>PURPOSE</h3> Analyze the reliability of CT scans to measure PI in patients with spondylolisthesis compared to patients without spondylolistheses. <h3>STUDY DESIGN/SETTING</h3> Retrospective study from a single, academic center between 2013 and 2016 <h3>PATIENT SAMPLE</h3> A total of 361 patients who had pelvic/abdominal CT scans during an emergency room visit. <h3>OUTCOME MEASURES</h3> Analyze the reliability of CT scans to measure PI in patients with and without spondylolisthesis. <h3>METHODS</h3> The study included patients > 18 years and had no lumbar or pelvis fracture. We documented: age, average PI (right and left) and spondylolisthesis (type, grading and location). Left and right PI were determined on sagittal CT scans measuring the angle between the hip axis to an orthogonal line originating at the center of the superior end plate axis of the first sacral vertebra. Spondylolisthesis grading was determined on sagittal CT scans using Myerding Classification. An average PI (right and left) was calculated using both sides. We categorized patients with spondylolisthesis (n=45) and those without spondylolisthesis (n=316). Subgroups were comprised based on the location of the spondylolisthesis (L4/L5 and L5/S1) and the type of spondylolisthesis (isthmic or degenerative). An ANOVA test was used for continuous variables and Chi-square test for the categorical variables. P≤0.05 was considered as statistically significant. <h3>RESULTS</h3> There was no statistical difference in PI: between patients with and without spondylolisthesis (p=0.29); between subgroups of patients with spondylolisthesis at L4/L5 and without spondylolisthesis (p=0.52); between subgroups with type of spondylolisthesis at L4/L5 and without spondylolisthesis (p=0.47); and between spondylolisthesis patients at L5/S1 and without spondylolisthesis (p=0.40). Patients with isthmic spondylolisthesis at L5/S1 had nearly significant higher PI (p=0.06) compared to without spondylolisthesis and with degenerative spondylolisthesis at L5/S1. There was a trend towards higher PI in Grade 2 spondylolisthesis patients (L5/S1), p=0.18. <h3>CONCLUSIONS</h3> PI was significantly higher in patients with isthmic spondylolisthesis at L5/S1 and a trend toward increased PI with Grade 2 isthmic spondylolisthesis at L5/S1. Our reported PI correlated with PI reported in literature measured using standard radiographs in patients with spondylolisthesis. <h3>FDA DEVICE/DRUG STATUS</h3> This abstract does not discuss or include any applicable devices or drugs.

A Prospective Randomized Study of the Safety and Efficacy of Transforaminal Lumbar Interbody Fusion Versus Posterior Lumbar Interbody Fusion in the Treatment of Lumbar Spondylolisthesis: A Cost utility from a Lower-middle-income Country Perspective and Review of Literature

BACKGROUND: The safety and efficacy of transforaminal lumbar interbody fusion (TLIF) and posterior lumbar interbody fusion (PLIF) in lumbar spondylolisthesis have not been validated in many prospective randomized trials. AIM: We aimed to validate the safety and efficacy of TLIF and PLIF surgery in lumbar spondylolisthesis using the clinical, radiographic, and cost-utility outcomes. METHODS: The data of surgically treated single-level spondylolisthesis patients were randomized prospectively into two groups. The groups were compared regarding demographics, perioperative complications, hospital stay, total expenditure, fusion rate, and clinical outcomes (visual analog scale, Oswestry disability index, Zurich claudication scale, and Odom’s criteria). A review of literature was done to compare the outcomes with the ones from higher-income nations. RESULTS: Thirty-three patients underwent prospective randomization. The improvement in the clinical outcomes at 12-month follow-up showed improvement in the TLIF group more than the PLIF group but with no significant difference. The mean operative time was significantly longer in the PLIF (p &lt; 0.05), also, the blood loss was significantly less in the TLIF (p &lt; 0.001). The complications frequency did not show any statistical significance between both groups and no significant difference in the patient’s post-operative patient satisfaction (p = 0.6). The mean hospital stay was non-significantly longer in the PLIF (p = 0.7). At 12-month follow-up, 93.3% of the TLIF patients were fused versus 86.7% of the PLIF (p = 0.5). The total cost of the TLIF was significantly less (p &lt; 0.001). CONCLUSION: Both PLIF and TLIF could achieve similar fusion rates and clinical satisfaction in the management of lumbar spondylolisthesis. The TLIF group was significantly better in terms of financial burden, operative time, and blood loss.

THE ROLE OF DISCOGENOUS RADICULOPATHIES AND SPONDYLOLYSTHESIS IN THE STRUCTURE OF PAIN SYNDROME AFTER TOTAL HIP ARTHROPLASTY

Resume. In the structure of complications, pain syndrome, which is not associated with instability of the components of the endoprosthesis or infection, remains a serious problem due to difficulties in diagnosis and treatment. The cause of residual pain may be the presence in the patient of discogenic radiculopathy or spon-dylolisthesis of the lumbar spine. The aim of the study. To determine the role of discogenic radiculopathies and spondylolisthesis of the lumbar spine in the structure of pain after hip arthroplasty. Materials and methods. A sample and retrospective analysis of case histories of 138 patients with hip and lumbar syndrome, who under-went hip arthroplasty in the clinic of orthopedics and traumatology of adults SI "ITO NAMS of Ukraine". All patients were examined clinically and radiologically. Additionally, all patients were examined by a neurolo-gist to determine the neurological status of patients, diagnosis. Evaluation of the effectiveness of treatment of patients with residual effects of discogenic radiculopathy and spondylolisthesis after hip arthroplasty was performed on the functional scale of Oswestry. Results. The analysis of the patient database revealed a statisti-cally significant (p≤0.05) predominance of patients with the presence of disc herniation at the level of L3-L4 and hypolordosis. The survey revealed 9 cases of discogenic radiculopathy and 6 cases of spondylolisthesis in patients with PD, which amounted to 6.5% and 4.5% of the total number of examined patients. The high effi-ciency of the developed treatment-and-prophylactic measures in patients with discogenic radiculopathy or spondylolisthesis and lumbar-lumbar syndrome has been determined. Timely appointment of complex conserva-tive and operative methods allowed to achieve satisfactory results in 100% of cases. Conclusions. Studies to determine the role of discogenic radiculopathy and spondylolisthesis of the lumbar spine in the structure of pain after hip arthroplasty will contribute to the further development of clinical, diagnostic and treatment algorithms for patients with hip and lumbar syndrome.

Direct reduction of high-grade lumbosacral spondylolisthesis with anterior cantilever technique - surgical technique note and preliminary results

BackgroundsSurgical reduction for high-grade spondylolisthesis is beneficial for restoring sagittal balance and improving the biomechanical environment for arthrodesis. Compared to posterior total laminectomy and long instrumentation, anterior lumbar inter-body fusion (ALIF) is less invasive and has the biomechanical advantage of restoring the original disk height and increasing lumbar lordosis, thus improving sagittal balance. However, the application of ALIF is still limited in treating low-grade spondylolisthesis. In this study, we developed a new technique termed anterior cantilever procedure to directly reduce the slippage of high-grade lumbosacral spondylolisthesis. The purpose of our study was to investigate the surgical outcomes of the anterior cantilever procedure followed by ALIF and posterior mono-segment instrumented fixation in high-grade spondylolisthesis.MethodsAll patients with high-grade spondylolisthesis who underwent anterior cantilever procedure followed by anterior lumbar inter-body fusion (ALIF) and posterior mono-segment instrumented fixation between November 2006 and July 2017 were enrolled in our study. The slip percentage, Dubousset’s lumbosacral angle, pelvic tilt, sacral slope, pelvic incidence, and sagittal alignment were measured pre-operatively and postoperatively at the last follow-up. Surgery time, blood loss, complications, and hospital stay were also collected and analysed.ResultsA total of 11 consecutive patients with high-grade spondylolisthesis patients were included and analysed. All of the high-grade spondylolisthesis in our series occurred at the L5-S1 level. The median age was 37 years, and the median follow-up duration was 36 months. The average slip reduction was 30% (60 to 30%, P < 0.01), and the average correction of Dubousset’s lumbosacral angle was 13.8° (84.1° to 97.9°, P < 0.01). The median intra-operative blood loss was 300 mL. All patients attained improved sagittal balance after the operation and achieved solid fusion within 9 months after surgery. No incidences of implant failure, permanent neurological deficit, or pseudarthrosis were recorded at the last follow-up.ConclusionsAnterior cantilever procedure followed by ALIF and posterior mono-segment instrumented fixation is a valid procedure for treating high-grade spondylolisthesis. It achieved a high fusion rate, partially reduced slippage, and significantly improved lumbosacral angle, while minimizing common complications, such as pseudarthrosis, nerve traction injury, excessive soft tissue dissection, and blood loss in posterior reduction procedures. However, posterior instrumentation is still required to the structural stability in the ALIF procedure.Level of evidenceIV

Harmonized outcome measures for use in degenerative lumbar spondylolisthesis patient registries and clinical practice.

The development of new treatment approaches for degenerative lumbar spondylolisthesis (DLS) has introduced many questions about comparative effectiveness and long-term outcomes. Patient registries collect robust, longitudinal data that could be combined or aggregated to form a national and potentially international research data infrastructure to address these and other research questions. However, linking data across registries is challenging because registries typically define and capture different outcome measures. Variation in outcome measures occurs in clinical practice and other types of research studies as well, limiting the utility of existing data sources for addressing new research questions. The purpose of this project was to develop a minimum set of patient- and clinician-relevant standardized outcome measures that are feasible for collection in DLS registries and clinical practice. Nineteen DLS registries, observational studies, and quality improvement efforts were invited to participate and submit outcome measures. A stakeholder panel was organized that included representatives from medical specialty societies, health systems, government agencies, payers, industries, health information technology organizations, and patient advocacy groups. The panel categorized the measures using the Agency for Healthcare Research and Quality's Outcome Measures Framework (OMF), identified a minimum set of outcome measures, and developed standardized definitions through a consensus-based process. The panel identified and harmonized 57 outcome measures into a minimum set of 10 core outcome measure areas and 6 supplemental outcome measure areas. The measures are organized into the OMF categories of survival, clinical response, events of interest, patient-reported outcomes, and resource utilization. This effort identified a minimum set of standardized measures that are relevant to patients and clinicians and appropriate for use in DLS registries, other research efforts, and clinical practice. Collection of these measures across registries and clinical practice is an important step for building research data infrastructure, creating learning healthcare systems, and improving patient management and outcomes in DLS.