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Interspinous device

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https://www.readbyqxmd.com/read/29533607/redox-active-metallodithiolene-groups-separated-by-insulating-tetraphosphinobenzene-spacers
#1
Kuppuswamy Arumugam, Malathy Selvachandran, Antony Obanda, Mohamed C Shaw, Perumalreddy Chandrasekaran, Sonya L Caston Good, Joel T Mague, Stephen Sproules, James P Donahue
Compounds of the type [(S2 C2 R2 )M(μ-tpbz)M(S2 C2 R2 )] (R = CN, Me, Ph, p-anisyl; M = Ni, Pd, Pt; tpbz = 1,2,4,5-tetrakis(diphenylphosphino)benzene) have been prepared by transmetalation with [(S2 C2 R2 )SnR'2 ] reagents, by direct displacement of dithiolene ligand from [M(S2 C2 R2 )2 ] with 0.5 equiv of tpbz, or by salt metathesis using Na2 [S2 C2 (CN)2 ] in conjunction with X2 M(μ-tpbz)MX2 (X = halide). X-ray crystallography reveals a range of topologies (undulating, chair, bowed) for the (S2 C2 )M(P2 C6 P2 )M(S2 C2 ) core...
March 13, 2018: Inorganic Chemistry
https://www.readbyqxmd.com/read/29475577/lumbar-disc-herniation-surgery-with-microdiscectomy-plus-interspinous-stabilization-good-clinical-results-but-failure-to-lower-the-incidence-of-re-operation
#2
REVIEW
Manuel Segura-Trepichio, Antonio Martin-Benlloch, Jose Manuel Montoza-Nuñez, David Candela-Zaplana, Andreu Nolasco
BACKGROUND: Discectomy is sometimes associated with recurrence of disc herniation and pain after surgery. The evidence to use an interspinous dynamic stabilization system (IDSS) in association with disc excision to prevent pain and re-operation, remains controversial. METHODS: Patients (age 18-50 years) presenting with lumbago/sciatica (ICD-10-CM M54.3, M54.4) due to voluminous lumbar disc herniation were eligible for participation. Patients underwent microdiscectomy plus IDSS...
February 20, 2018: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/29354740/long-term-results-with-percutaneous-interspinous-process-devices-in-the-treatment-of-neurogenic-intermittent-claudication
#3
Patrick Fransen
Background: Neurogenic intermittent claudication (NIC) is the main symptom of degenerative lumbar spinal stenosis. Percutaneous interspinous process decompression devices (IPDs) have been designed as an alternative therapy to conservative treatment and to open decompressive surgery for patients suffering from NIC. Initial short-term results were encouraging. We present the long-term results of a group of patients that we followed to provide insight on long-term outcomes and effectiveness of this technique compared to other decompression methods...
December 2017: Journal of Spine Surgery (Hong Kong)
https://www.readbyqxmd.com/read/29307048/biomechanical-analysis-of-a-new-lumbar-interspinous-device-with-optimized-topology
#4
Chen-Sheng Chen, Shih-Liang Shih
Interspinous spacers used stand-alone preserve joint movement but provide little protection for diseased segments of the spine. Used as adjuncts with fusion, interspinous spacers offer rigid stability but may accelerate degeneration on adjacent levels. Our new device is intended to balance the stability and preserves motion provided by the implant. A new interspinous spacer was devised according to the results of topology optimization studies. Four finite element (FE) spine models were created that consisted of an intact spine without an implant, implantation of the novel, the device for intervertebral assisted motion (DIAM system), and the Dynesys system...
January 6, 2018: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/29201301/effects-of-different-angles-of-the-traction-table-on-lumbar-spine-ligaments-a-finite-element-study
#5
Hekmat Farajpour, Nima Jamshidi
Background: The traction bed is a noninvasive device for treating lower back pain caused by herniated intervertebral discs. In this study, we investigated the impact of the traction bed on the lower back as a means of increasing the disc height and creating a gap between facet joints. Methods: Computed tomography (CT) images were obtained from a female volunteer and a three-dimensional (3D) model was created using software package MIMICs 17.0. Afterwards, the 3D model was analyzed in an analytical software (Abaqus 6...
December 2017: Clinics in Orthopedic Surgery
https://www.readbyqxmd.com/read/29075640/response-to-comment-on-controversies-about-interspinous-process-devices-in-the-treatment-of-degenerative-lumbar-spine-diseases-past-present-and-future
#6
COMMENT
Roberto Gazzeri, Marcelo Galarza, Alex Alfieri
No abstract text is available yet for this article.
2017: BioMed Research International
https://www.readbyqxmd.com/read/29021675/surgical-treatment-of-bilateral-nondisplaced-isthmic-lysis-by-interlaminar-fixation-device
#7
Keyvan Mostofi, Reza Karimi Khouzani
STUDY DESIGN: Spondylolysis is a defect in the portion of pars interarticularis. The latter affects approximately 6% of the population. It is caused by repetitive trauma in hyperextension. Low back pain is the most common symptom. METHODS: We implanted interspinous process devices in 12 patients with isthmic lysis without spondylolisthesis for low back pain. The purpose of the surgery was to conduct a minimally invasive procedure. RESULTS: In eight cases, patients became asymptomatic...
July 2017: Journal of Craniovertebral Junction and Spine
https://www.readbyqxmd.com/read/28973638/percutaneous-interspinous-spacer-vs-decompression-in-patients-with-neurogenic-claudication-an-alternative-in-selected-patients
#8
Bernhard Meyer, Adad Baranto, Frederic Schils, Frederic Collignon, Bjorn Zoega, Leong Tan, Jean-Charles LeHuec
BACKGROUND: Standalone interspinous process devices (IPDs) to treat degenerative lumbar spinal stenosis with neurogenic intermittent claudication (NIC) have shown ambiguous results in the literature. OBJECTIVE: To show that a minimally invasive percutaneous IPD is safe and noninferior to standalone decompressive surgery (SDS) for patients with degenerative lumbar spinal stenosis with NIC. METHODS: A multicenter, international, randomized, controlled trial (RCT) was con- ducted...
June 26, 2017: Neurosurgery
https://www.readbyqxmd.com/read/28937328/biomechanical-effects-of-hybrid-stabilization-on-the-risk-of-proximal-adjacent-segment-degeneration-following-lumbar-spinal-fusion-using-an-interspinous-device-or-a-pedicle-screw-based-dynamic-fixator
#9
Chang-Hyun Lee, Young Eun Kim, Hak Joong Lee, Dong Gyu Kim, Chi Heon Kim
OBJECTIVE Pedicle screw-rod-based hybrid stabilization (PH) and interspinous device-based hybrid stabilization (IH) have been proposed to prevent adjacent-segment degeneration (ASD) and their effectiveness has been reported. However, a comparative study based on sound biomechanical proof has not yet been reported. The aim of this study was to compare the biomechanical effects of IH and PH on the transition and adjacent segments. METHODS A validated finite element model of the normal lumbosacral spine was used...
December 2017: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/28750451/long-term-clinical-outcomes-and-quality-of-life-in-elderly-patients-treated-with-interspinous-devices-for-lumbar-spinal-stenosis
#10
Massimo Miscusi, Sokol Trungu, Stefano Forcato, Alessandro Ramieri, Filippo Maria Polli, Antonino Raco
No abstract text is available yet for this article.
July 27, 2017: Journal of Neurological Surgery. Part A, Central European Neurosurgery
https://www.readbyqxmd.com/read/28738891/pivotal-trials-of-orthopedic-surgical-devices-in-the-united-states-predominance-of-two-arm-non-inferiority-designs
#11
S Raymond Golish
BACKGROUND: The United States Food and Drug Administration (FDA) reviews class III orthopedic devices submitted for premarket approval with pivotal clinical trials. The purpose of this study was to determine the types of orthopedic devices reviewed, the design of their pivotal clinical trials, and the subjective factors affecting the interpretation of clinical trial data. METHODS: Meetings of the FDA Orthopaedic and Rehabilitation Devices Panel were identified from 2000-2016...
July 24, 2017: Trials
https://www.readbyqxmd.com/read/28680778/transforaminal-lumbar-interbody-fusion-with-rigid-interspinous-process-fixation-a-learning-curve-analysis-of-a-surgeon-team-s-first-74-cases
#12
Patrick Doherty, Arthur Welch, Jason Tharpe, Camille Moore, Chris Ferry
BACKGROUND: Studies have shown that a significant learning curve may be associated with adopting minimally invasive transforaminal lumbar interbody fusion (MIS TLIF) with bilateral pedicle screw fixation (BPSF). Accordingly, several hybrid TLIF techniques have been proposed as surrogates to the accepted BPSF technique, asserting that less/fewer fixation(s) or less disruptive fixation may decrease the learning curve while still maintaining the minimally disruptive benefits. TLIF with interspinous process fixation (ISPF) is one such surrogate procedure...
May 30, 2017: Curēus
https://www.readbyqxmd.com/read/28622909/biomechanical-evaluation-of-a-novel-pedicle-screw-based-interspinous-spacer-a-finite-element-analysis
#13
Hsin-Chang Chen, Jia-Lin Wu, Shou-Chieh Huang, Zheng-Cheng Zhong, Shiu-Ling Chiu, Yu-Shu Lai, Cheng-Kung Cheng
Interspinous spacers have been designed to provide a minimally invasive surgical technique for patients with lumbar spinal stenosis or foraminal stenosis. A novel pedicle screw-based interspinous spacer has been developed in this study, and the aim of this finite element experiment was to investigate the biomechanical differences between the pedicle screw-based interspinous spacer (M-rod system) and the typical interspinous spacer (Coflex-F™). A validated finite element model of an intact lumbar spine was used to analyze the insertions of the Coflex-F™, titanium alloy M-rod (M-Ti), and polyetheretherketone M-rod (M-PEEK), independently...
June 13, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28600006/is-there-still-a-role-for-interspinous-spacers-in-the-management-of-neurogenic-claudication
#14
REVIEW
Vijay M Ravindra, Zoher Ghogawala
Lumbar spinal stenosis with neurogenic claudication is prevalent in the elderly population. Decompression for this condition is the operation most commonly used to treat older patients. Because of the risks associated with open decompression procedures, particularly in older patients with comorbidities, minimally invasive procedures with implantation of interspinous process devices have been developed. This article reviews the current role of interspinous spacers in the treatment of lumbar spinal stenosis with neurogenic claudication and discusses the body of literature surrounding this treatment alternative...
July 2017: Neurosurgery Clinics of North America
https://www.readbyqxmd.com/read/28584819/comment-on-controversies-about-interspinous-process-devices-in-the-treatment-of-degenerative-lumbar-spine-diseases-past-present-and-future
#15
COMMENT
Alessandro Landi, Fabrizio Gregori, Giovanni Grasso, Cristina Mancarella, Roberto Delfini
No abstract text is available yet for this article.
2017: BioMed Research International
https://www.readbyqxmd.com/read/28479526/superion-interspinous-spacer-treatment-of-moderate-spinal-stenosis-4-year-results
#16
RANDOMIZED CONTROLLED TRIAL
Pierce D Nunley, Vikas V Patel, Douglas G Orndorff, William F Lavelle, Jon E Block, Fred H Geisler
OBJECTIVE: To determine 4-year clinical outcomes in patients with moderate lumbar spinal stenosis treated with minimally invasive stand-alone interspinous process decompression using the Superion device. METHODS: The 4-year Superion data were extracted from a randomized, controlled Food and Drug Administration investigational device exemption trial. Patients with intermittent neurogenic claudication relieved with back flexion who failed at least 6 months of nonsurgical management were enrolled...
August 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28437334/a-new-fixation-technique-for-french-door-cervical-laminoplasty-surgical-results-with-a-minimum-follow-up-of-6-years
#17
Nanjundappa S Harshavardhana, Harshad V Dabke, Hossein Mehdian
DESIGN: A case series of 5 patients with multilevel cervical myelopathy treated by French-door cervical laminoplasty (FDCL) and use of unicortical iliac crest graft as spacer fixed with titanium miniplates and screws is described. OBJECTIVE: To report a minimum of 6-year follow-up results of our new plate-screw fixation technique for FDCL. SUMMARY OF BACKGROUND DATA: Hardware-assisted laminoplasty has the potential advantage of preventing restenosis by holding the laminar door "open" while healing progresses and also prevents spacer dislodgement...
May 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28413736/targeted-intraspinal-radiofrequency-ablation-for-lumbar-spinal-stenosis
#18
Robert E Jacobson, Michelle Granville, Jesse Hatgis DO
INTRODUCTION: By using a combination of magnetic resonance imaging (MRI) and computed tomography (CT) of the lumbar spine, it is possible to distinguish between spinal stenosis caused by bone compression and specific soft tissue epidural intraspinal lesions that cause localized spinal canal stenosis and neural compression. Examples include facet cysts and yellow ligament hypertrophy. Many of these patients are elderly with medical comorbidities that make open surgery problematic. MATERIALS & METHODS: This is a study of patients with predominantly soft tissue stenosis being treated with targeted intraspinal radiofrequency (RF) heat ablation...
March 10, 2017: Curēus
https://www.readbyqxmd.com/read/28410566/biomechanical-effect-of-interspinous-process-distraction-height-after-lumbar-fixation-surgery-an-in-vitro-model
#19
Lin Fu, Jianxiong Ma, Bin Lu, Haobo Jia, Jie Zhao, Mingjie Kuang, Rui Feng, Liyan Xu, Haohao Bai, Lei Sun, Ying Wang, Xinlong Ma
Pedicle screw fixation may induce abnormal activity at adjacent segment and accelerate the degeneration of lumbar vertebrae. Dynamic stabilizers could provide an intermediate solution between conservative treatment and fusion surgery. Lumbar vertebral segment cephalad to instrumented fixation was the most common localization of adjacent segment degeneration. The aim of this study is to explore the use of interspinous process devices in the lumbar vertebral segment cephalad to fixation segment in changing the mechanical distribution and limiting abnormal activity of the spine...
April 1, 2017: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/28332140/interspinous-implants-are-the-new-implants-better-than-the-last-generation-a-review
#20
REVIEW
Michael Pintauro, Alexander Duffy, Payman Vahedi, George Rymarczuk, Joshua Heller
PURPOSE OF REVIEW: Interspinous process devices (IPDs) are used in the surgical treatment of lumbar spinal stenosis. The purpose of this review is to compare the first generation with the next-generation devices in terms of complications, device failure, reoperation rates, symptom relief, and outcome. RECENT FINDINGS: Thirty-seven studies were included from 2011 to 2016. Device failure occurred at a mean of 3.7%, with a lower tendency to happen with next-generation IPDs...
June 2017: Current Reviews in Musculoskeletal Medicine
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