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Spinal cord implants

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https://www.readbyqxmd.com/read/28079752/changes-in-dorsal-root-ganglion-gene-expression-in-response-to-spinal-cord-stimulation
#1
Dana M Tilley, David L Cedeño, Courtney A Kelley, Margaret DeMaegd, Ramsin Benyamin, Ricardo Vallejo
BACKGROUND AND OBJECTIVES: Spinal cord stimulation (SCS) has been shown to influence pain-related genes in the spinal cord directly under the stimulating electrodes. There is limited information regarding changes occurring at the dorsal root ganglion (DRG). This study evaluates gene expression in the DRG in response to SCS therapy. METHODS: Rats were randomized into experimental or control groups (n = 6 per group). Experimental animals underwent spared-nerve injury, implantation of lead, and continuous SCS (72 hours)...
January 11, 2017: Regional Anesthesia and Pain Medicine
https://www.readbyqxmd.com/read/28076603/extracellular-adenosine-5-triphosphate-concentrations-changes-in-rat-spinal-cord-associated-with-the-activation-of-urinary-bladder-afferents-a-microdialysis-study
#2
Jeová Nina Rocha
Objective: To determine adenosine 5'-triphosphate levels in the interstice of spinal cord L6-S1 segment, under basal conditions or during mechanical and chemical activation of urinary bladder afferents. Methods: A microdialysis probe was transversally implanted in the dorsal half of spinal cord L6-S1 segment in female rats. Microdialysate was collected at 15 minutes intervals during 135 minutes, in anesthetized animals. Adenosine 5'-triphosphate concentrations were determined with a bioluminescent assay...
October 2016: Einstein
https://www.readbyqxmd.com/read/28072810/high-frequency-spinal-cord-stimulation-for-complex-regional-pain-syndrome-a-case-report
#3
Joseph T Crapanzano, Lisa M Harrison-Bernard, Mark R Jones, Alan D Kaye, Erich O Richter, Mordeci N Potash
Complex regional pain syndrome (CRPS) is a chronic, debilitating, neuropathic pain condition which is often misdiagnosed, difficult to manage, and lacks proven methods for remission. Most available methods provide some relief to a small percentage of patients. Recent FDA approval and superiority of the Nevro Senza 10-kHz high frequency (HF10) spinal cord stimulation (SCS) therapy over traditional low-frequency spinal cord stimulation for treatment of chronic back and leg pain may provide a new interventional therapeutic option for patients suffering from CRPS...
January 2017: Pain Physician
https://www.readbyqxmd.com/read/28070746/boundary-cap-neural-crest-stem-cells-promote-survival-of-mutant-sod1-motor-neurons
#4
Tanya Aggarwal, Jan Hoeber, Patrik Ivert, Svitlana Vasylovska, Elena N Kozlova
ALS is a devastating disease resulting in degeneration of motor neurons (MNs) in the brain and spinal cord. The survival of MNs strongly depends on surrounding glial cells and neurotrophic support from muscles. We previously demonstrated that boundary cap neural crest stem cells (bNCSCs) can give rise to neurons and glial cells in vitro and in vivo and have multiple beneficial effects on co-cultured and co-implanted cells, including neural cells. In this paper, we investigate if bNCSCs may improve survival of MNs harboring a mutant form of human SOD1 (SOD1(G93A)) in vitro under normal conditions and oxidative stress and in vivo after implantation to the spinal cord...
January 9, 2017: Neurotherapeutics: the Journal of the American Society for Experimental NeuroTherapeutics
https://www.readbyqxmd.com/read/28067245/effect-of-hierarchically-aligned-fibrin-hydrogel-in-regeneration-of-spinal-cord-injury-demonstrated-by-tractography-a-pilot-study
#5
Zhenxia Zhang, Shenglian Yao, Sheng Xie, Xiumei Wang, Feiyan Chang, Jie Luo, Jingming Wang, Jun Fu
Some studies have reported that scaffold or cell-based transplantation may improve functional recovery following SCI, but no imaging information regarding regeneration has been provided to date. This study used tractography to show the regenerating process induced by a new biomaterial-aligned fibrin hydrogel (AFG). A total of eight canines subjected to SCI procedures were assigned to the control or the AFG group. AFG was implanted into the SCI lesion immediately after injury in 5 canines. A follow-up was performed at 12 weeks to evaluate the therapeutic effect including the hindlimb functional recovery, anisotropy and continuity of fibers on tractography...
January 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28065638/iterative-metal-artefact-reduction-in-ct-can-dedicated-algorithms-improve-image-quality-after-spinal-instrumentation
#6
J Aissa, C Thomas, L M Sawicki, J Caspers, P Kröpil, G Antoch, J Boos
AIM: To investigate the value of dedicated computed tomography (CT) iterative metal artefact reduction (iMAR) algorithms in patients after spinal instrumentation. MATERIALS AND METHODS: Post-surgical spinal CT images of 24 patients performed between March 2015 and July 2016 were retrospectively included. Images were reconstructed with standard weighted filtered back projection (WFBP) and with two dedicated iMAR algorithms (iMAR-Algo1, adjusted to spinal instrumentations and iMAR-Algo2, adjusted to large metallic hip implants) using a medium smooth kernel (B30f) and a sharp kernel (B70f)...
January 5, 2017: Clinical Radiology
https://www.readbyqxmd.com/read/28058831/peptide-tethered-hydrogel-scaffold-promotes-recovery-from-spinal-cord-transection-via-synergism-with-mesenchymal-stem-cells
#7
Li-Ming Li, Min Han, Xinchi Jiang, Xianzhen Yin, Fu Chen, Tian-Yuan Zhang, Hao Ren, Jiwen Zhang, Zhong Chen, Tingjun Hou, HongWei Ouyang, Yasuhiko Tabata, Youqing Shen, Jian-Qing Gao
Spinal cord injury (SCI) is one of the most devastating injuries. Treatment strategies for SCI are required to overcome comprehensive issues. Implantation of biomaterial scaffolds and stem cells has been demonstrated to be promising strategies. However, a comprehensive recovery effect is difficult to achieve. In the comprehensive treatment process, the specific roles of the implanted scaffolds and of stem cells in combined strategy are usually neglected. In this study, a peptide-modified scaffold is developed based on hyaluronic acid and an adhesive peptide PPFLMLLKGSTR...
January 6, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28050455/outcomes-of-short-segment-posterior-instrumentation-in-unstable-thoracolumbar-fractures
#8
Sharvil H Gajjar, Hari J Menon, Nitin Chaudhari, Vipul Chaudhari
INTRODUCTION: The spinal traumas are common and leading problem in orthopaedics practice. The individuals are at a risk of high energy trauma in modern era. Unstable thoracolumbar burst fractures are serious injuries of concern, if left untreated may result in marked morbidity and disability to the patient. Thoracolumbar is the second most common segment involved in the spinal cord following spinal injuries followed by cervical segment. The goal of treatment of any spinal injury is restoration of the patient to maximum possible function with disability free life...
November 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28048063/su-f-j-85-evaluation-of-the-velocity-deformable-image-registration-algorithm
#9
D Polan, J Kamp, J Y Lee, C Chapman, M Green, S Payal, M Kessler, K Brock
PURPOSE: To perform validation and commissioning of a commercial deformable image registration (DIR) algorithm (Velocity, Varian Medical Systems) for numerous clinical sites using single and multi-modality images. METHODS: In this retrospective study, the DIR algorithm was evaluated for 10 patients in each of the following body sites: head and neck (HN), prostate, liver, and gynecological (GYN). HN DIRs were evaluated from planning (p)CT to re-pCT and pCTs to daily CBCTs using dice similarity coefficients (DSC) of corresponding anatomical structures...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28044002/abdominal-wall-type-i-complex-regional-pain-syndrome-treated-effectively-with-peripheral-nerve-field-stimulation-a-case-report
#10
Linqiu Zhou, Henry Chou, Eric Holder
Chronic abdominal wall pain is a well-documented complication of abdominal surgery. However, abdominal wall complex regional pain syndrome (CRPS) is a rare medical condition. We present a case of abdominal wall CRPS and its treatment with peripheral nerve field stimulation (PNfS). A 34-year-old female presented with right periumbilical pain for 2 years. She developed burning, sharp and stabbing pain with allodynia (extremely sensitive to wind and light touch) and erythema or pallor 2 weeks after an exploratory appendectomy...
January 2, 2017: Journal of Surgical Case Reports
https://www.readbyqxmd.com/read/28042918/the-neurostimulation-appropriateness-consensus-committee-nacc-safety-guidelines-for-the-reduction-of-severe-neurological-injury
#11
REVIEW
Timothy R Deer, Tim J Lamer, Jason E Pope, Steven M Falowski, David A Provenzano, Konstantin Slavin, Stanley Golovac, Jeffrey Arle, Joshua M Rosenow, Kayode Williams, Porter McRoberts, Samer Narouze, Sam Eldabe, Shivanand P Lad, Jose A De Andrés, Eric Buchser, Philippe Rigoard, Robert M Levy, Brian Simpson, Nagy Mekhail
INTRODUCTION: Neurostimulation involves the implantation of devices to stimulate the brain, spinal cord, or peripheral or cranial nerves for the purpose of modulating the neural activity of the targeted structures to achieve specific therapeutic effects. Surgical placement of neurostimulation devices is associated with risks of neurologic injury, as well as possible sequelae from the local or systemic effects of the intervention. The goal of the Neurostimulation Appropriateness Consensus Committee (NACC) is to improve the safety of neurostimulation...
January 2, 2017: Neuromodulation: Journal of the International Neuromodulation Society
https://www.readbyqxmd.com/read/28035466/a-rare-postoperative-complication-of-anterior-lower-thoracic-instrumentation-diaphragmatic-laceration-with-hemothorax
#12
Yat Wa Wong, Jason Pui Yin Cheung, Keith Dip Kei Luk, Kenneth Man Chee Cheung
PURPOSE: To highlight the importance of preventing visceral injury due to prominent anterior implants at the spinal column. METHODS: A 52-year-old man with cord compression was treated with a T9/10 discectomy and instrumented fusion via a right thoracotomy and trans-pleural approach. Postoperatively, he had improved lower limb numbness. However, after a bout of coughing, there was sudden increase in chest drain output, hemodynamic instability and massive fluid collection in the right chest cavity...
December 29, 2016: European Spine Journal
https://www.readbyqxmd.com/read/28032698/thoracic-vertebral-hemangioma-with-spinal-cord-compression-multidisciplinary-surgical-treatment-and-follow-up-of-six-patients
#13
Hui-Lin Zhang, Yong-Cheng Hu, Rajendra Aryal, Xin He, Deng-Xing Lun, Li-Ming Zhao
OBJECTIVE: To provide useful insights of multidisciplinary surgical treatment for vertebral hemangioma with spinal cord compression. METHODS: From 2009 to 2014, data on six patients who were diagnosed with cord compression vertebral hemangioma were reviewed and analyzed retrospectively. There were five women and one man with a mean age of 48.6 years (range, 26-68 years). All the patients were treated by multidisciplinary approach, including use of gelfoam, pedicle screw instrumentation, vertebroplasty, and decompression laminectomy...
November 2016: Orthopaedic Surgery
https://www.readbyqxmd.com/read/28025843/10-khz-high-frequency-spinal-cord-stimulation-for-chronic-axial-low-back-pain-in-patients-with-no-history-of-spinal-surgery-a-preliminary-prospective-open-label-and-proof-of-concept-study
#14
Adnan Al-Kaisy, Stefano Palmisani, Thomas E Smith, David Pang, Khai Lam, William Burgoyne, Russell Houghton, Emma Hudson, Jonathan Lucas
OBJECTIVE: To explore the effectiveness of 10 kHz high frequency spinal cord stimulation (HF10 therapy) treatment of chronic low back pain in patients who have not had spinal surgery. METHODS: Patients with chronic low back pain without prior spinal surgery were evaluated by a team of spine surgeons to rule out any spinal pathology amenable to surgical interventions and by a multidisciplinary pain team to confirm eligibility for the study. After a successful (>50% back pain reduction) trial of HF10 therapy, enrolled subjects underwent permanent system implantation and were followed-up one year post-implant...
December 26, 2016: Neuromodulation: Journal of the International Neuromodulation Society
https://www.readbyqxmd.com/read/28025365/spinal-cord-stimulation-provides-pain-relief-with-improved-psychosocial-function-results-from-emp3ower
#15
Jason Rosenberg, Alain Fabi, Kenneth Candido, Nick Knezevic, Michael Creamer, Alexios Carayannopoulos, Abdi Ghodsi, Christopher Nelson, Matthew Bennett
OBJECTIVE: The EMP(3)OWER™ study evaluated spinal cord stimulation (SCS) safety and efficacy and the associated changes in psychosocial and functional outcomes. METHODS: Upon informed consent and IRB approval, 620 eligible subjects were enrolled prior to SCS trial evaluation and were assessed at baseline, 3, 6 and 12 months post-implant. Patient-reported pain relief (PRP), numerical rating scale (NRS), satisfaction, quality of life (QOL), and pain disability index (PDI) were assessed at all follow-up visits while the pain catastrophizing scale (PCS), short form-36 (SF-36), short form-McGill pain questionnaire version 2 (SF-MPQ-2), and the state-trait anxiety inventory (STAI) were assessed at the 6- and 12-month follow-up visits...
December 2016: Pain Medicine: the Official Journal of the American Academy of Pain Medicine
https://www.readbyqxmd.com/read/28018514/radiopaque-ruler-guided-frozen-elephant-trunk-technique
#16
Akihiko Ikeda, Taisuke Konishi, Kanji Matsuzaki, Tomoaki Jikuya
Frozen elephant trunk (FET) technique combines open surgery and endovascular repair for extensive thoracic aortic aneurysms. When a FET is inserted into the descending thoracic aorta, it is difficult to confirm its proper positioning. Here we report a radiopaque ruler-guided FET technique. On the basis of preoperative computed tomography, we create a roadmap which shows the relationship between the descending thoracic aorta and vertebrae. During surgery, a radiopaque ruler placed beneath the patient's back provides the accurate target position under fluoroscopy...
2016: Annals of Vascular Diseases
https://www.readbyqxmd.com/read/28011383/the-combination-of-db-camp-and-chabc-with-poly-propylene-carbonate-microfibers-promote-axonal-regenerative-sprouting-and-functional-recovery-after-spinal-cord-hemisection-injury
#17
Tongliang Xia, Bin Huang, Shilei Ni, Lei Gao, Jiangang Wang, Jian Wang, Anjing Chen, Shaowei Zhu, Benlin Wang, Gang Li, Shugan Zhu, Xingang Li
This study describes the use of poly(propylene carbonate) (PPC) electrospun microfibres impregnated with a combination of dibutyryl cyclic adenosine monophosphate (db-cAMP) and chondroitinase ABC (ChABC) in the treatment of right-side hemisected spinal cord injury (SCI). Release of db-cAMP and/or ChABC from the microfibres was assessed in vitro using high-performance liquid chromatography (HPLC). Drug-impregnated microfibres were implanted into the hemisected thoracic spinal cord of rats, and treatment was evaluated using functional recovery examinations and immunohistochemistry...
December 20, 2016: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28008298/severe-protracted-spasm-of-urinary-bladder-and-autonomic-dysreflexia-caused-by-changing-the-suprapubic-catheter-in-a-cervical-spinal-cord-injury-patient-treatment-by-a-bolus-dose-and-increased-total-daily-dose-of-intrathecal-baclofen
#18
Subramanian Vaidyanathan, Tun Oo, Bakul M Soni, Peter L Hughes, Gurpreet Singh
BACKGROUND: Intrathecal administration of baclofen by implanted pump reduces rigidity and muscle spasms. Its use specifically to control bladder spasms has not been reported. CASE REPORT: A tetraplegic patient developed severe, protracted, bladder spasms, abdominal muscles spasms, and high blood pressure after change of suprapubic catheter; nifedipine, diazepam, and paracetamol did not control spasms; bolus dose of baclofen intrathecally produced prompt relief via baclofen pump...
2016: Clinical Medicine Insights. Case Reports
https://www.readbyqxmd.com/read/27997509/minimally-invasive-placement-of-spinal-cord-stimulator-paddle-electrodes-is-associated-with-improved-perioperative-and-long-term-experience-among-neuropathic-pain-patients
#19
Mohammed F Shamji, Darcia Paul, Alina Shcharinsky
STUDY DESIGN: Prospective, observational cohort study. OBJECTIVE: This study compared in-hospital and long-term outcomes among SCS patients undergoing paddle insertion by open or MIS approaches. SUMMARY OF BACKGROUND DATA: Patients with treatment-refractory extremity neuropathic pain may benefit from spinal cord stimulation (SCS). Conventional placement of surgical paddles for an external neurostimulation trial is through open laminectomy, but minimally-invasive surgery (MIS) techniques may offer advantages...
December 16, 2016: Spine
https://www.readbyqxmd.com/read/27994147/ownership-of-an-artificial-limb-induced-by-electrical-brain-stimulation
#20
Kelly L Collins, Arvid Guterstam, Jeneva Cronin, Jared D Olson, H Henrik Ehrsson, Jeffrey G Ojemann
Replacing the function of a missing or paralyzed limb with a prosthetic device that acts and feels like one's own limb is a major goal in applied neuroscience. Recent studies in nonhuman primates have shown that motor control and sensory feedback can be achieved by connecting sensors in a robotic arm to electrodes implanted in the brain. However, it remains unknown whether electrical brain stimulation can be used to create a sense of ownership of an artificial limb. In this study on two human subjects, we show that ownership of an artificial hand can be induced via the electrical stimulation of the hand section of the somatosensory (SI) cortex in synchrony with touches applied to a rubber hand...
January 3, 2017: Proceedings of the National Academy of Sciences of the United States of America
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