Journal of spinal disorders & techniques Impact Factor & Information

Publisher: Lippincott, Williams & Wilkins

Journal description

Current impact factor: 1.89

Impact Factor Rankings

2015 Impact Factor Available summer 2015
2013 / 2014 Impact Factor 1.888
2012 Impact Factor 1.767
2011 Impact Factor 1.503
2010 Impact Factor 1.333
2009 Impact Factor 1.206
2008 Impact Factor 1.365
2007 Impact Factor 1.303
2006 Impact Factor 1.11
2005 Impact Factor 1.583
2004 Impact Factor 1.121
2003 Impact Factor 0.736
2002 Impact Factor 0.728

Impact factor over time

Impact factor

Additional details

5-year impact 1.69
Cited half-life 7.80
Immediacy index 0.43
Eigenfactor 0.01
Article influence 0.59
Other titles Journal of spinal disorders & techniques (Online), Journal of spinal disorders & techniques, Journal of spinal disorders and techniques, Journalofspinaldisorders &
ISSN 1539-2465
OCLC 49377308
Material type Document, Periodical, Internet resource
Document type Internet Resource, Computer File, Journal / Magazine / Newspaper

Publisher details

Lippincott, Williams & Wilkins

  • Pre-print
    • Author can archive a pre-print version
  • Post-print
    • Author cannot archive a post-print version
  • Restrictions
    • 12 months embargo
  • Conditions
    • Some journals have separate policies, please check with each journal directly
    • Pre-print must be removed upon acceptance for publication
    • Post-print may be deposited in personal website or institutional repository
    • Publisher's version/PDF cannot be used
    • Must include statement that it is not the final published version
    • Published source must be acknowledged with full citation
    • Set statement to accompany deposit
    • Must link to publisher version
    • NIH authors will have their accepted manuscripts transmitted to PubMed Central on their behalf after a 12 months embargo (see policy for details)
    • Wellcome Trust and HHMI authors will have their accepted manuscripts transmitted to PubMed Central on their behalf after a 6 months embargo (see policy for details)
    • Publisher last reviewed on 19/03/2015
  • Classification
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Publications in this journal

  • [Show abstract] [Hide abstract]
    ABSTRACT: Retrospective review. To review the feasibility of a posterior-only approach for instrumented reconstruction in lumbar burst fractures. Burst fractures of the lumbar spine have been treated through a variety of techniques, including anterior, posterior, or combined approaches. Here we review series of patients undergoing posterior-only transpedicular corpectomy with instrumented fusion for traumatic lumbar burst fracture. All patients treated at the Los Angeles County+University of Southern California (LAC+USC) Medical Center who had sustained traumatic lumbar burst fractures from February 2005 to February 2014 were reviewed. A total of 178 traumatic lumbar burst fractures were identified of which 89 required operative intervention. Of those 89 operations, 7 patients underwent posterior-only approach for transpedicular corpectomy. Levels operated on were at L1 (4 patients), L2 (1 patient), and L4 (2 patients). The mean age was 35 years of age (range, 21-56 y), and mechanism of injury was either motor vehicle accident (5 patients) or fall (2 patients). Initial neurological examination was American Spinal Injury Association (ASIA) B in 3 patients, ASIA D in 3 patients, and 1 patient was neurologically intact. Mean thoracolumbar injury classification and severity score on presentation was 6.4 (range, 5-8), whereas the mean load sharing classification score was 7.4 (range, 7-9). Of patients who were not immediately lost to follow-up on hospital discharge, mean clinical follow-up was 45.3 months (range, 18.8-68.6 mo), whereas mean radiographic follow-up was 28.8 months (range, 1.3-63.6 mo). At the last known radiographic follow-up, no patient had gross hardware fracture, pseudoarthrosis, or adjacent segment disease. One patient with the longest radiographic follow-up of 63.6 months was noted to have some minimal subsidence of his cage with no other change in his other hardware. A posterior-only approach for transpedicular corpectomy and instrumented fusion is a viable treatment option for lumbar burst fracture which allows for reconstruction of the anterior column while avoiding many of the risks and complications associated with an anterior or combined approach.
    Journal of spinal disorders & techniques 08/2015; DOI:10.1097/BSD.0000000000000312
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    ABSTRACT: In vitro cadaveric biomechanical study. To assess revision pullout strength of novel anchored screws (AS) versus conventional larger diameter traditional pedicle screws (TPS) in an osteoporotic model. Pedicle screws are the most ubiquitous method of treating spinal pathologies requiring lumbar fusion. Although these screws are effective in providing 3-column stabilization of the spine, revision surgeries are occasionally necessary, particularly for geriatric and osteoporotic populations. Innovative technologies should be tested to ensure continued improvement in revision techniques. For 4 specimens at L2-L5 (T-score=-3.6±0.54), 6.5-mm-diameter TPS were inserted into left and right pedicles and were pulled out; revision screws were then inserted. Polyether-ether-ketone anchors, designed to expand around a 6.5-mm screw, were inserted into all left pedicles. On the contralateral side, 7.5-mm-diameter TPS were inserted at L2-L3, and 8.5-mm-diameter TPS at L4-L5. Pullout testing was performed at 10 mm/min. The maximum pullout strength and insertion forces were recorded. The initial average pullout force (6.5-mm screw) was 837 N (±329 N) and 642 N (±318 N) in L2-L3 and L4-L5 left pedicles, and 705 N (±451 N) and 779 N (±378 N) in L2-L3 and L4-L5 right pedicles, respectively. Comparison of revision pullout forces versus initial pullout forces revealed the following: 87% and 63% for AS in L2-L3 and L4-L5 left pedicles, respectively; 56% for 7.5-mm and 93% for 8.5-mm TPS in L2-L3 and L4-L5 right pedicles, respectively. Anchor sleeves with 6.5-mm-diameter pedicle screws provided markedly higher resistance to screw pullout than 7.5-mm-diameter revision screws and fixation statistically equivalent to 8.5-mm-diameter screws, possibly because of medial-lateral expansion within the vertebral space and/or convex filling of the pedicle. AS results had the lowest SD, indicating minimal variability in bone-screw purchase.
    Journal of spinal disorders & techniques 08/2015; DOI:10.1097/BSD.0000000000000313
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    ABSTRACT: Modern computing power has given us the ability to approach statistical questions in a manner which was previously impossible because of the time-consuming nature of the calculations required. Computer power has enabled the use of Bayesian inference techniques, based on 18th century theory, to frame statistical questions in probability.
    Journal of spinal disorders & techniques 08/2015; DOI:10.1097/BSD.0000000000000320
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    ABSTRACT: Prospective study. The purpose of this study was to compare the long-term clinical and radiologic outcomes of hybrid surgery (HS) and 2-level anterior cervical discectomy and fusion (2-ACDF) in patients with 2-level cervical disk disease. In a previous study with a 2-year follow-up, HS was shown to be superior to 2-ACDF, with a better Neck Disability Index (NDI) score, less postoperative neck pain, faster C2-C7 range of motion (ROM) recovery, and less adjacent ROM increase. Between 2004 and 2006, 40 patients undergoing 2-level cervical disk surgery at our hospital were identified as 2-level degenerative disk disease. Forty patients were included in the previous study; 35 patients were followed up for 5 years. Patients completed the NDI and graded their pain intensity before surgery and at routine postoperative until 5 years. Dynamic cervical radiographs were obtained before surgery and at routine postoperative intervals and the angular ROM for C2-C7 and adjacent segments was measured. The HS group had better NDI recovery until 3 years after surgery (P<0.05). Postoperative neck pain was lower in the HS group at 1 and 3 years after surgery (P<0.05), but arm pain relief was not differently relieved. The HS group showed more angular ROM for C2-C7 at 2 and 3 years after surgery. The superior adjacent segment ROM showed hypermobility in the 2-ACDF group and hypomobility in the HS group at all follow-up periods without statistically significance, but the inferior adjacent segment ROM differed significantly (P<0.05). HS is superior to 2-ACDF; it leads to better NDI recovery, less postoperative neck pain, faster C2-C7 ROM recovery, and less adjacent ROM increase over a 2-year follow-up, but these benefits of HS become similar to those of 2-ACDF with 5 years of follow-up.
    Journal of spinal disorders & techniques 08/2015; DOI:10.1097/BSD.0000000000000316
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    ABSTRACT: A retrospective review of prospectively collected radiographic and clinical data. This study aims to investigate the relationship between cage subsidence and bone mineral density (BMD), and to reveal the clinical implications of cage subsidence. Posterior lumbar interbody fusion (PLIF) has become one of the standard treatment modality for lumbar degenerative disease. However, cage subsidence might result in recurrent foraminal stenosis and deteriorate the clinical results. Furthermore, numbers of osteoporosis patients who underwent PLIF are increasing. Therefore, the information on the correlations between cage subsidence, BMD, and clinical results will be of great significance. A total 139 segments was included in this retrospective study. We examined functional rating index (Visual Analogue Scale for pain, Oswestry Disability Index, Short Form-36 score) preoperatively, and investigated their changes after postoperative 1 year. Correlation between cage subsidence and clinical scores was investigated. Plain anteroposterior and lateral radiograph were taken preoperatively and postoperatively and during follow-up. Preoperative BMD and subsidence measured by postoperative 1 year 3-dimensional computed tomography were achieved and their correlation was assessed. All postoperative clinical scores improved significantly compared with preoperative ones (pain Visual Analogue Scale: 7.34-2.89, Oswestry Disability Index: 25.34-15.86, Short Form-36: 26.45-16.46, all P<0.001). BMD showed significant weak correlation with subsidence (r=-0.285, P<0.001). Severe osteoporotic segments (T score <-3.0) had more risk to develop severe subsidence (>3 mm) compared with the segments in which T score were higher than -3.0 (P=0.012), and its odds ratio was 8.44. Subsidence had no significant correlation with all clinical scores. This study revealed that cage subsidence is relevant to BMD. However, it was demonstrated that subsidence is not related to the clinical deterioration. Therefore, PLIF procedure which is conducted carefully can be a good surgical option to treat lumbar degenerative disease for osteoporotic patients.
    Journal of spinal disorders & techniques 08/2015; DOI:10.1097/BSD.0000000000000315
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    ABSTRACT: Degenerative spondylolisthesis (DS) is one of the more commonly encountered spine conditions. The diagnosis of DS has changed little in the last 30 years. However, there has been an evolution in the treatment of this disease entity. There have been several landmark papers that helped govern our treatment. These helped serve as the basis for the treatment arms of the Spine Patient Outcomes Research Trial (SPORT), which offers the highest quality evidence to date. Although few would argue that the fusion of the diseased segment appears to offer the best and most durable results, treatment of this disease is best tailored to the individual. Fusion may offer the best results in the young active patient, but the same results may never become evident in the medically infirm patient. Laminectomy or unilateral laminoforaminotomy still plays a role in disease treatment. This review will focus on the diagnosis and the treatment of DS as well as discuss the author's preferred treatment of this disease.
    Journal of spinal disorders & techniques 07/2015; 28(7). DOI:10.1097/BSD.0000000000000298
  • Journal of spinal disorders & techniques 07/2015; 28(7). DOI:10.1097/BSD.0000000000000303
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    ABSTRACT: Our understanding of the pathophysiological processes that comprise the early secondary phases of spinal cord injury such as spinal cord ischemia, cellular excitotoxicity, ionic dysregulation, and free-radical mediated peroxidation is far greater now than ever before, thanks to substantial laboratory research efforts. These discoveries are now being translated into the clinical realm and have led to targeted upfront medical management with a focus on tissue oxygenation and perfusion and include avoidance of hypotension, induction of hypertension, early transfer to specialized centers, and close monitoring in a critical care setting. There is also active exploration of neuroprotective and neuroregenerative agents; a number of which are currently in late stage clinical trials including minocycline, riluzole, AC-105, SUN13837, and Cethrin. Furthermore, new data have emerged demonstrating that the timing of spinal cord decompression after injury impacts recovery and that early decompression leads to significant improvements in neurological recovery. With this review we aim to provide a concise, clinically relevant and up-to-date summary of the topic of acute spinal cord injury, highlighting recent advancements and areas where further study is needed.
    Journal of spinal disorders & techniques 07/2015; 28(6):202-210. DOI:10.1097/BSD.0000000000000287
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    ABSTRACT: Prospective study. To investigate the efficacy of transcranial electrically stimulated muscle evoked potentials (TcE-MsEPs) for predicting postoperative segmental upper extremity palsy following cervical laminoplasty. Postoperative segmental upper extremity palsy, especially in the deltoid and biceps (so-called C5 palsy), is the most common complication following cervical laminoplasty. Some papers have reported that postoperative C5 palsy cannot be predicted by TcE-MsEPs, although others have reported that it can be predicted. This study included 160 consecutive cases that underwent open door laminoplasty, and TcE-MsEP monitoring was performed in the biceps brachii, triceps brachii, abductor digiti minimi, tibialis anterior and abductor hallucis. A more than 50% decrease in the wave amplitude was defined as an alarm point. According to the monitoring alarm, interventions were performed, which include steroid administration, foraminotomies etc. Postoperative deltoid and biceps palsy occurred in five cases. Among the 155 cases without segmental upper extremity palsy, there were no monitoring alarms. Among the five deltoid and biceps palsy cases, three case had significant wave amplitude decrease in the biceps during surgery and palsy occurred when the patients awoke from anesthesia (acute type). In the other two cases where the palsy occurred two days after the operation (delayed type), there were no significant wave decreases. In all of the cases, the palsy was completely resolved within 6 months. The majority of C5 palsies have been reported to occur several days following surgery, but some of them have been reported to occur immediately after surgery. Our results demonstrated that TcE-MsEPs can predict the acute type, although the delayed type cannot be predicted. A more than 50% wave amplitude decrease in the biceps is useful to predict acute type segmental upper extremity palsy. Further examination about the interventions for monitoring alarm will be essential for preventing palsy.This is an open-access article distributed under the terms of the Creative Commons Attribution-Non Commercial-No Derivitives License 4.0 (CCBY-NC-ND), where it is permissible to download and share the work provided it is properly cited. The work cannot be changed in any way or used commercially.
    Journal of spinal disorders & techniques 07/2015; DOI:10.1097/BSD.0000000000000311
  • Journal of spinal disorders & techniques 07/2015; 28(6):199-201. DOI:10.1097/BSD.0000000000000300
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    ABSTRACT: Retrospective review of prospectively collected data. To determine why artificial disc replacements (ADRs) fail by examining results of 91 patients in FDA studies performed at a single Investigational Device Exemption (IDE) site with minimum two-year follow-up. Patients following lumbar ADR generally achieve their 24-month follow-up results at three months postoperative. Every patient undergoing ADR at one IDE site by two surgeons was evaluated for clinical success. Failure was defined as less than 50% improvement in ODI and VAS or any additional surgery at index or adjacent spine motion segment. Three ADRs were evaluated: Maverick™ (M) 25 patients, Charité™ (C) 31 patients, Kineflex™(K) 35 patients. All procedures were one-level operations performed at L4-5 or L5-S1. Demographics and inclusion/exclusion criteria were similar and will be discussed. Overall clinical failure occurred in 26%, (24 of 91 patients) at two-year follow up. Clinical failure occurred in: (M) 28%, (7 of 25 patients); (C) 39%, (12 of 31 patients); (K) 14%, (5 of 35 patients). Causes of failure included facet pathology, 50% of failure patients (12 of 24). Implant complications occurred in 5% of total patients and 21% of failure patients (5 of 24). Only five patients went from a success to failure after three months. Only one patient went from a failure to success after a facet rhizotomy one year after ADR. Seventy-four percent of patients after ADR met strict clinical success after two-year follow-up. The clinical success verses failure rate did not change from their three-month follow-up in 85 of the 91 patients (93%). Overall clinical success may be improved most by patient selection and implant type.
    Journal of spinal disorders & techniques 06/2015; DOI:10.1097/BSD.0000000000000310
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    ABSTRACT: Injuries to the cervical spine in pediatric patients are uncommon. A missed injury can have devastating consequences in this age group. Due to the lack of routine in diagnosis and management of pediatric cervical spine injuries (PCSI), each of these cases represents a logistic and personal challenge. By means of clinical cases we demonstrate key points in diagnostics and treatment of pediatric spine injuries. We highlight typical pediatric injury patterns and more adult-like injuries. The most common cause of injury is blunt trauma. There is an age related pattern of injuries in pediatric patients. Children under the age of eight frequently sustain ligamentous injuries in the upper cervical spine. After the age of eight, the biomechanics of the cervical spine are similar to adults, and therefore, bony injuries of the subaxial cervical spine are most likely to occur. Clinical presentation of PCSI is heterogeneous. Younger children can neither interpret nor communicate neurologic abnormalities, which make timely and accurate diagnosis difficult. Plain radiographs are often mis-interpreted. We find different types of injuries at different locations, because of different biomechanical properties of the immature spine. We outline that initial management is crucial for long-term outcome. Knowledge of biomechanical properties and radiographic presentation of the immature spine can improve the awareness for PCSI. Diagnosis and management of pediatric patients after neck trauma can be demanding. IV.
    Journal of spinal disorders & techniques 06/2015; DOI:10.1097/BSD.0000000000000307
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    ABSTRACT: The passage of the Patient Protection and Affordable Care Act (ACA) in March 2010 has resulted in dramatic changes to the delivery of healthcare in the United States towards a value-based system. While this is a significant change from the previous model, it presents an opportunity for high-quality healthcare providers to improve patient outcomes while also increasing revenue. However those that lack a clear strategy to effectively implement change and communicate the increased value to the patients likely will suffer, regardless of how successful or prestigious they seem today.
    Journal of spinal disorders & techniques 06/2015; 28(7). DOI:10.1097/BSD.0000000000000308
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    ABSTRACT: Pilot single-centre, stratified, prospective, randomized, double-blinded, parallel-group, controlled study. To determine whether vertebral end-plate perforation after lumbar discectomy causes annulus reparation and intervertebral disc volume restoration. To determine that after six months there would be no clinical differences between the control and study group. Low back pain is the commonest long-term complication after lumbar discectomy. It is mainly caused by intervertebral disc space loss, which promotes progressive degeneration. This is the first study to test the efficiency of a previously described method (vertebral end-plate perforation) that should advocate for annulus fibrosus reparation and disc space restoration. We selected 30 eligible patients according to inclusion and exclusion criteria and randomly assigned them to the control (no end-plate perforation) or study (end-plate perforation) group. Each patient was evaluated in 5 different periods, where data was collected (preoperative and six months follow up MRI and functional outcome data (VAS back, VAS legs, Oswestry disability questionnaire). Intervertebral space volume (ISV) and height (ISH) were measured form the MRI images. Statistical analysis was performed using paired t-test and linear regression. P<0.05 was considered statistically significant. We found no statistically significant difference between the control group and the study group concerning ISV (P=0.6808) and ISH (P=0.8981) six months after surgery. No statistically significant differences were found between ODI, VAS back and VAS legs after six months between the two groups, however there were statistically significant differences between these parameters in different time periods. Correlation between the volume of disc tissue removed and preoperative versus postoperative difference in ISV was statistically significant (P=0.0020). The present study showed positive correlation between the volume of removed disc tissue and decrease in postoperative ISV and ISH. There were no statistically significant differences in ISV and ISH between the group with end-plate perforation and the control group six months after lumbar discectomy. Clinical outcome and disability were significantly improved in both groups three and six months after surgery.
    Journal of spinal disorders & techniques 06/2015; DOI:10.1097/BSD.0000000000000305
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    ABSTRACT: A retrospective radiographic study. To investigate the reliability of using MRI to measure thoracic outlet parameters and whether supine MRI could supersede upright X-ray in measuring these parameters. In X-ray, overlapped soft and bony tissues make sternum contour invisible. Thus, measuring thoracic inlet alignment in X-ray may be inaccurate. MRI could clearly show anatomy around thoracic inlet. One hundred and twenty-four adolescents with idiopathic thoracolumbar/lumbar scoliosis were recruited. The visibility of T1 upper end plate and the upper end of sternum in the lateral standing X-ray films was rated. For patients with moderate or good clarity forT1 upper end plate and the upper end of sternum on X-ray films, thoracic inlet angle (TIA), T1 slope (T1S) and neck tilt (NT) were measured by 3 observers on standing X-ray films and supine MR images, respectively. Intraclass correlation coefficients were used to determine the intraobserver, interobserver and method reliability. Paired t test was performed to compare the measurements between the two methods. The correlation coefficients between the two methods were analyzed by regression analysis. The visibility of thoracic inlet region in X-ray films was unsatisfactory, whereas all the landmarks were clear in MR images. Only 81 patients' X-ray films were graded as moderate or good visibility in the thoracic inlet region. Both the intraobserver ICC and interobserver ICC were better in the MRI set than in the X-ray set in all the observers for three TI parameters. Paired t test demonstrated that no significant difference was noted in terms of TIA, T1S and TN (P=0.572, 0.203 and 0.637, respectively). Regression analysis demonstrated high correlation coefficients for TIA, T1S and NT (R=0.612, 0.629 and 0.722, respectively). MRI serves as a good substitute for X-ray scans with regard to the measurement of TI alignment, with superior reliability.
    Journal of spinal disorders & techniques 06/2015; DOI:10.1097/BSD.0000000000000306
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    ABSTRACT: Spinal infections have historically been associated with significant morbidity and mortality. Current treatment protocols have improved patient outcomes through prompt and accurate infection identification, medical treatment, and surgical interventions. Medical and surgical management however remains controversial due to a paucity of high-level evidence to guide decision-making. Despite this, an awareness of presenting symptoms, pertinent risk factors, and common imaging findings are critical for treating spine infections. The purpose of this article is to review the recent literature and present the latest evidence-based recommendations for the most commonly encountered primary spinal infections: vertebral osteomyelitis and epidural abscess.
    Journal of spinal disorders & techniques 06/2015; 28(6). DOI:10.1097/BSD.0000000000000294
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    ABSTRACT: Practitioners in the surgical and procedural specialties must prepare to differentiate themselves and the performance of their care delivery teams through the use of substantive, objective metrics along with the provision of service guarantees. As purchasers of surgical and procedural services move towards outcomes-focused Value Based Insurance Design (VBID) and purchasing, practitioners must move well beyond branding and process measure-focused "Value Based Purchasing" initiatives and be prepared to compete with transparency -- not just regionally, but nationally - based upon objectively established outcomes metrics.
    Journal of spinal disorders & techniques 06/2015; 28(6). DOI:10.1097/BSD.0000000000000288