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Adjacent Segment

Pooria Hosseini, Colin Nnadi, Ľuboš Rehák, Martin Repko, Michael Grevitt, Ufuk Aydinli, Allen Carl, Jeff Pawelek, Dennis Crandall, Behrooz A Akbarnia
STUDY DESIGN: A prospective, nonrandomized, multicenter study. OBJECTIVES: The purpose of this study was to evaluate the amount of motion present at instrumented but unfused segments and at motion segments adjacent to the instrumentation following application of a new posterior apical short-segment correction technique for correcting adolescent idiopathic scoliosis (AIS). SUMMARY OF BACKGROUND DATA: High-density pedicle screw instrumentation and posterior arthrodesis of all instrumented levels is the most common surgical treatment for AIS stabilization...
October 15, 2016: Spine
Takao Sato, John Jose, Mohamed El-Mawardy, Dmitriy S Sulimov, Ralph Tölg, Gert Richardt, Mohamed Abdel-Wahab
Heterogeneity of neointimal thickness is observed after drug-eluting stents implantation in bifurcation lesions (BL). We evaluated the vascular response of everolimus-eluting bioresorbable scaffold (BRS) struts deployed at BL using optical coherence tomography (OCT). 50 patients (64 scaffolds) underwent follow-up OCT after BRS implantation. Cross-sectional areas of each BL with a side branch more than 1.5 mm were analyzed using OCT every 200 µm. All images were divided into three regions according to shear stress: the 1/2 circumference of the vessel opposite to the ostium (OO), the vessel wall adjacent to the ostium (AO) and the side-branch ostium (SO)...
October 18, 2016: International Journal of Cardiovascular Imaging
Mohamed Macki, Sbaa Syeda, Kenan Rajjoub, Panagiotis Kerezoudis, Ali Bydon, Jean-Paul Wolinsky, Timothy Witham, Daniel M Sciubba, Mohamad Bydon, Ziya Gokaslan
INTRODUCTION: The primary objective of this study is to examine the effects smoking status on rhBMP-2 supplementation in spinal fusion constructs. METHODS: Patient records were retrospectively reviewed for a consecutive set of patients who underwent first-time posterolateral, instrumented fusion of the lumbar spine for degenerative spinal disease. All operations included arthrodesis supplementation with rhBMP-2. All patients were followed for at least two years...
October 15, 2016: World Neurosurgery
Yu Ding, Di-Ke Ruan, Qing He, Li Sheng Hou, Jian Ning Lin, Hong Peng Cui
STUDY DESIGN: The clinical and radiologic data of total disk allografting (TDA) cases were collected and analyzed to explore the correlation between neurological function improvements and imaging changes. OBJECTIVE: The aim of the study was to assess the medium-term and long-term outcome and radiographic character after TDA, and, furthermore, to explore the significance of the changes of imaging signs after the transplantation. SUMMARY OF BACKGROUND DATA: Spinal fusion may result in the adjacent segment degeneration...
November 2016: Clinical Spine Surgery
Erik V de Kelft
STUDY DESIGN: This is a feasibility study to confirm the design, patient population, and the surgical technique for FENIX implants. OBJECTIVE: This study evaluated the safety and the clinical and radiologic performance of bilaterally implanted FENIX facet resurfacing device. INTRODUCTION: Facet joint osteoarthritis is responsible for up to 30% of chronic low back pain. Arthroplasty is a surgical treatment option that aims to relieve pain while maintaining or restoring motion...
November 2016: Clinical Spine Surgery
Mark Driscoll, Carl-Éric Aubin, Alain Moreau, Yaroslav Wakula, Samira Amini, Stefan Parent
STUDY DESIGN: In vivo porcine model utilized to evaluate the influence of an intravertebral fusionless growth modulating device (hemi-staple) on intervertebral disks and growth plates. OBJECTIVE: To evaluate the radiographic and histologic changes in disks and growth plates with the purpose of measuring influence of the explored hemi-staple. SUMMARY OF BACKGROUND DATA: Fusionless growth modulation for the early treatment of scoliosis should insure the long-term viability of the intervertebral disk and successfully reduce or arrest local growth...
November 2016: Clinical Spine Surgery
Shiro Imagama, Noriaki Kawakami, Yuji Matsubara, Taichi Tsuji, Tetsuya Ohara, Yoshito Katayama, Naoki Ishiguro, Tokumi Kanemura
STUDY DESIGN: Retrospective clinical study. OBJECTIVE: To investigate adjacent segment degeneration (ASD) at 5 years after L4/5 posterior lumbar interbody fusion with pedicle screw instrumentation and L4/5 decompression surgery using plain radiographs, computed tomography (CT), and magnetic resonance imaging (MRI), with the evaluation of annual changes on MRI. SUMMARY OF BACKGROUND DATA: Methods of evaluation have been inconsistent among studies of ASD...
November 2016: Clinical Spine Surgery
Asuka Desroches, Yuichiro Morishita, Itaru Yugue, Takeshi Maeda, Charles-Henri Flouzat-Lachaniette, Philippe Hernigou, Keiichiro Shiba
STUDY DESIGN: A retrospective evaluation of sagittal angular motion from cervical spinal flexion to extension. OBJECTIVE: To evaluate the kinematic effects of cervical laminoplasty for cervical spondylotic myelopathy (CSM) on the occipitoatlantoaxial junction. SUMMARY OF BACKGROUND DATA: The kinematic effects of cervical laminoplasty for CSM on the occipitoatlantoaxial junction remain controversial. METHODS: A total of 65 CSM patients who were treated with cervical laminoplasty ranging from the C3 to C7 vertebrae were included in the study...
October 6, 2016: Clinical Spine Surgery
Harry T Mai, Robert J Burgmeier, Sean M Mitchell, Andrew C Hecht, Joseph C Maroon, Gordon W Nuber, Wellington K Hsu
STUDY DESIGN: Retrospective cohort study OBJECTIVE.: To determine if the level of a cervical disc herniation (CDH) procedure will uniquely impact performance-based outcomes in elite athletes of the National Football League (NFL). SUMMARY OF BACKGROUND DATA: Comparative assessments of post-surgical outcomes in NFL athletes with CDH at different levels are unknown. Further, the surgical decision making for these types of injuries in professional football athletes remains controversial...
September 30, 2016: Spine
Chang-Qing Zhao, Wei Ding, Kai Zhang, Jie Zhao
BACKGROUND: Large lumbar or lumbosacral (LS) disc herniations usually expand from the paramedian space to the neuroforamen and compress both the transversing (lower) and the exiting (upper) nerve roots, thus leading to bi-radicular symptoms. Bi-radicular involvement is a statistically significant risk factor for poor outcome in patients presenting with far lateral or foraminal disc herniation after facet preserving microdecompression. There is evidence showing that patients suffering from large lumbar disc herniations treated with interbody fusion have significant superior results in comparison with those who received a simple discectomy...
September 2016: Indian Journal of Orthopaedics
M C Gimenez, A J Ramirez-Pastor
The percolation problem of irreversibly deposited heteronuclear dimers on square lattices is studied. A dimer is composed of two segments, and it occupies two adjacent adsorption sites. Each segment can be either a conductive segment (segment type A) or a nonconductive segment (segment type B). Three types of dimers are considered: AA, BB, and AB. The connectivity analysis is carried out by accounting only for the conductive segments (segments type A). The model offers a simplified representation of the problem of percolation of defective (nonideal) particles, where the presence of defects in the system is simulated by introducing a mixture of conductive and nonconductive segments...
September 2016: Physical Review. E
Christopher Piorkowski, Ole-A Breithardt, Hedi Razavi, Yelena Nabutovsky, Stuart P Rosenberg, Craig D Markovitz, Arash Arya, Sascha Rolf, Silke John, Jedrzej Kosiuk, Eric Olson, Charlotte Eitel, Yan Huo, Michael Döring, Sergio Richter, Kyungmoo Ryu, Thomas Gaspar, Frits W Prinzen, Gerhard Hindricks, Philipp Sommer
AIMS: In times of evolving cardiac resynchronization therapy, intra-procedural characterization of left ventricular (LV) mechanical activation patterns is desired but technically challenging with currently available technologies. In patients with normal systolic function, we evaluated the feasibility of characterizing LV wall motion using a novel sensor-based, real-time tracking technology. METHODS AND RESULTS: Ten patients underwent simultaneous motion and electrical mapping of the LV endocardium during sinus rhythm using electroanatomical mapping and navigational systems (EnSite™ NavX™ and MediGuide™, SJM)...
October 12, 2016: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
Martin H Pham, Alexander Tuchman, Lance Smith, Andre M Jakoi, Neil N Patel, Vivek A Mehta, Frank L Acosta
Proximal junctional kyphosis is an increasingly recognized complication following long-segment posterior spinal fusion for adult spinal deformity. The authors describe a novel technique for interspinous ligament reinforcement at the proximal adjacent levels using a cadaveric semitendinosus tendon graft secured with an Ethibond No. 2 double filament (Ethicon, Somerville, New Jersey) via the Krackow suture weave. A retrospective review identified 4 patients who had received this graft. No proximal junctional kyphosis was seen at a mean short-term follow-up of 5...
October 13, 2016: Orthopedics
Lucio Urbani, Riccardo Balestri, Francesco Sidoti, Juri Riccardo Bernardini, Francesco Arces, Gabriella Licitra, Chiara Leoni, Francesco Forfori, Piero Colombatto, Piero Boraschi, Maura Castagna, Piero Buccianti
BACKGROUND: Parenchyma-sparing liver surgery allows resecting hepatic veins (HV) at the hepatocaval confluence with minor (<3 adjacent segments) liver resections. PTFE graft can be used as a bridge to communicating-veins maturation to ensure the correct outflow of the spared liver. We present a video of an intrahepatic cholangiocarcinoma (IC) involving the three HV at the hepatocaval confluence treated with this approach. METHODS: In a 50-year old obese (BMI 44...
October 11, 2016: Annals of Surgical Oncology
Kae Sian Tay, Anupreet Bassi, William Yeo, Wai Mun Yue
BACKGROUND CONTEXT: There is no current literature comparing outcomes of patients with and without lumbar scoliosis having neurological symptoms undergoing Minimally Invasive Transforaminal Lumbar Interbody Fusion (MIS TLIF) technique. PURPOSE: To determine whether associated lumbar scoliosis will result in different clinical, radiological and operative outcomes in patients undergoing focal MISTLIF for neurogenic symptoms, without specific correction of the scoliosis...
October 7, 2016: Spine Journal: Official Journal of the North American Spine Society
Albert Edward Telfeian
No abstract text is available yet for this article.
October 7, 2016: World Neurosurgery
Sheng Shi, Xin-Feng Li, Zu-De Liu
No abstract text is available yet for this article.
October 2016: World Neurosurgery
Xiu-Ping Chen, Ruo-Jing Fan, Fang Zhang, Zhong-Quan Li, Bin Xu, Yin-Long Guo
RATIONALE: In order to improve analysis of analytes in trace amounts in a complex matrix, we developed a novel post-processing method, named Chromatographic Peak Reconstruction (CPR), to process the recorded data from gas chromatography time-of-flight mass spectrometry (GC-TOF MS). METHODS: For a trace ion, the relative deviation (δ) between the adjacent scanned mass-to-charge ratios (m/z) was found inversely proportional to its MS peak intensity. Based on this relationship, the thresholds of δ value within the specified intensity segments were estimated by the CPR and used to screen out the suspicious scan-points in the extracted ion chromatographic (EIC) peak...
October 10, 2016: Rapid Communications in Mass Spectrometry: RCM
Mehmet Nuri Erdem, Sinan Karaca, Seckin Sarı, Feridun Yumrukcal, Ruhat Tanli, Mehmet Aydogan
BACKGROUND CONTEXT: Application of pedicle screws with cement in order to strengthen the fixation of the osteoporotic spine has increasingly gained popularity. However, the technique has also led to an increase in cement-related complications. PURPOSE: The aim of this study was to compare the clinical and radiological results of the patients with degenerative spinal pathologies who were treated with pedicle screws and cement injections on all segments versus those who were treated with cement injections only on the strategic vertebrae selected...
October 5, 2016: Spine Journal: Official Journal of the North American Spine Society
N-X Bonne, F Dubrulle, M Risoud, C Vincent
The surgical management of skull base lesions is difficult due to the complex anatomy of the region and the intimate relations between the lesion and adjacent nerves and vessels. Minimally invasive approaches are increasingly used in skull base surgery to ensure an optimal functional prognosis. Three-dimensional (3D) computed tomography (CT) reconstruction facilitates surgical planning by visualizing the anatomical relations of the lesions in all planes (arteries, veins, nerves, inner ear) and simulation of the surgical approach in the operating position...
October 5, 2016: European Annals of Otorhinolaryngology, Head and Neck Diseases
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