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Compression, recovery,

Jonathan T Kaplan, Corey P Neu, Hicham Drissi, Nancy C Emery, David M Pierce
Osteoarthritis and articular cartilage injuries are common conditions in human joints and a frequent cause of pain and disability. Unfortunately, cartilage is avascular and has limited capabilities for self-repair. Despite the societal impact, there is little information on the dynamic process of cartilage degeneration. We performed a series of cyclic unconfined compression tests motivated by in vivo loading conditions and designed to generate mechanical fatigue. We examined the functional (both stress-stretch and creep) responses of the tissue after recovery from a specified number of loading cycles, as well as histology and second harmonic generation microscopy images...
October 1, 2016: Journal of the Mechanical Behavior of Biomedical Materials
M Ohashi, T Hirano, K Watanabe, K Katsumi, H Shoji, A Sano, H Tashi, I Takahashi, M Wakasugi, Y Shibuya, N Endo
STUDY DESIGN: Retrospective multicenter study. OBJECTIVES: To analyze the predictive factors for postoperative ambulatory recovery in paretic non-ambulatory patients with metastatic spinal cord compression (MSCC). SETTING: Japan. METHODS: Eighty-two consecutive patients (74.4% men; mean age, 66.2 years) who could not walk before surgery due to cervical or thoracic MSCC and underwent posterior decompressive surgery between 2003 and 2014 were included...
October 18, 2016: Spinal Cord
J K F Wong, C C Hsu, C H Lin, S H Lien, Y T Lin
BACKGROUND: Many techniques have been described to relieve the compression and reduce subluxation of the ulnar nerve following surgery. The subfascial anterior transposition of the ulnar nerve (SfATUN) is one described technique, but involves a long scar, risk of injury to the medial antebrachial cutaneous nerve, and possible nerve ischemia from anterior transposition. We assessed a more refined approach of endoscopy-assisted SfATUN for the treatment of cubital tunnel syndrome. METHODS: A consecutive case series of 21 patients (15 males and 6 females) with evidence of nerve subluxation after ulnar nerve decompression were operated using an endoscopy-assisted SfATUN...
September 16, 2016: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
ShuLing Wang, Hui Xu
An inorganic-organic hybrid nanocomposite (zinc oxide/polypyrrole) that represents a novel kind of coating for in-tube solid-phase microextraction is reported. The composite coating was prepared by a facile electrochemical polymerization strategy on the inner surface of a stainless steel tube. Based on the coating tube, a novel online in-tube solid-phase microextraction with liquid chromatography and mass spectrometry method was developed and applied for the extraction of three monohydroxy polycyclic aromatic hydrocarbons in human urine...
October 17, 2016: Journal of Separation Science
Gregory M Astill, C Richard Shumway
There has been sustained interest from both environmental regulators and livestock associations to expand the use of anaerobic digester (AD) technology to mitigate greenhouse gas emissions. However, the generally profitable practice of codigesting off-farm organic waste could increase nitrogen and phosphorus content to the farm and exacerbate nutrient over-application concerns near large animal operations. We examine the economic feasibility of a broad set of dairy waste management systems composed of two technology groups that mitigate air and water pollution: an AD system that includes either animal waste input or combination animal/off-farm organic waste codigestion input and either compressed natural gas (CNG) or combined heat and power (CHP) output; and a filtration system that includes fiber separation, nutrient separation, and/or water recovery...
October 10, 2016: Journal of Environmental Management
Hideki Urano, Katsuyuki Iwatsuki, Michiro Yamamoto, Tetsuro Ohnisi, Shigeru Kurimoto, Nobuyuki Endo, Hitoshi Hirata
We developed a novel hydrogel derived from sodium carboxymethylcellulose (CMC) in which phosphatidylethanolamine (PE) was introduced into the carboxyl groups of CMC to prevent perineural adhesions. This hydrogel has previously shown excellent anti-adhesive effects even after aggressive internal neurolysis in a rat model. Here, we confirmed the effects of the hydrogel on morphological and physiological recovery after nerve decompression. We prepared a rat model of chronic sciatic nerve compression using silicone tubing...
2016: PloS One
Ahmad Jabir Rahyussalim, Ifran Saleh, M Fajrin Armin, Tri Kurniawati, Ahmad Yanuar Safri
INTRODUCTION: Intraoperative neurophysiologic monitoring (IONM) had important role related to the complications in spinal surgery. Somatosensory Evoked Potential (SSEP), Transcranial electric Muscle Evoked Potentials (tceMEPs), and free run EMG are parameters used to asses functional integrity of the nervous system during surgical procedures. Once warning signal was recognized, surgeon have to make a precise decision to overcome that problem. PRESENTATION OF CASE: We present a 47-year old male with back pain due to compression fracture of thoracic vertebra T12 and lumbar vertebrae L1...
September 23, 2016: International Journal of Surgery Case Reports
Karthika Suresh, Shivprasad Patil, Pattuparambil Ramanpillai Rajamohanan, Guruswamy Kumaraswamy
Subtle variations in the preparation of ice-templated nanoparticle assemblies yield monoliths that are chemically identical, but that exhibit qualitatively different mechanical behavior. We ice template aqueous dispersions to prepare macroporous monoliths comprising largely of silica nanoparticles held together by a crosslinked polymer mesh. When the polymer is crosslinked in the presence of ice crystals, we obtain an elastic sponge that is capable of recovery after imposition of large compressive strains (up to 80%)...
October 7, 2016: Langmuir: the ACS Journal of Surfaces and Colloids
Erin M Lee, Kathryn Smith, Ken Gall, Barbara D Boyan, Zvi Schwartz
Microscale surface roughness has been shown to enhance osseointegration of titanium implants through increased osteoblast differentiation while osteoblast proliferation remains greater on smooth titanium. Taking advantage of these phenomena, we developed a shape memory (meth)acrylate copolymer with thermomechanical properties that created a time-dependent dynamic surface change from smooth to rough under in vitro cell culture conditions and evaluated the effect of the shape recovery on osteoblast response...
December 2016: Biomaterials
Erlick A C Pereira, Mohammad Farwana, Khai S Lam
Spinal stenosis and low-grade spondylolisthesis produce symptoms of neural compression that can be treated with extreme lateral lumbar interbody fusion (XLIF) via indirect decompression. This study aimed to investigate whether the restoration of disc dimensions would relieve symptoms of radiculopathy, claudication and back pain. In this retrospective study, patients undergoing XLIF surgery for relief of radicular symptoms or degenerative disc disease were included. Radiologically proven changes were used to assess the modes of degeneration...
October 1, 2016: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
Yue-Qi Zhu, Laura Edmonds, Li-Ming Wei, Rei-La Zheng, Ruo-Yu Cheng, Wen-Guo Cui, Ying-Sheng Cheng
OBJECTIVES: Determine the feasibility of and tissue response to biodegradable magnesium-silicone stent insertion into the oesophagus of rabbits. METHODS: Mechanical compression-recovery and degradation behaviours of the stents were investigated in vitro. Thirty rabbits were randomly divided into a magnesium-silicone stent group (n = 15) that received stent insertion into the lower 1/3 of the oesophagus under fluoroscopic guidance and a control group (n = 15)...
October 4, 2016: European Radiology
Amirali Aghazadeh, Adam Y Lin, Mona A Sheikh, Allen L Chen, Lisa M Atkins, Coreen L Johnson, Joseph F Petrosino, Rebekah A Drezek, Richard G Baraniuk
Early identification of pathogens is essential for limiting development of therapy-resistant pathogens and mitigating infectious disease outbreaks. Most bacterial detection schemes use target-specific probes to differentiate pathogen species, creating time and cost inefficiencies in identifying newly discovered organisms. We present a novel universal microbial diagnostics (UMD) platform to screen for microbial organisms in an infectious sample, using a small number of random DNA probes that are agnostic to the target DNA sequences...
September 2016: Science Advances
Corey T Gatewood, Andrew A Tran, Jason L Dragoo
PURPOSE: There is a wide array of device modalities available for post-operative treatment following arthroscopic knee surgery; however, it remains unclear which types and duration of modality are the most effective. This systematic review aimed to investigate the efficacy of device modalities used following arthroscopic knee surgery. METHODS: A systematic search of the literature was performed on: PubMed; Scopus; MEDLINE; EMBASE; PEDro; SportDiscus; and CINAHL databases (1995-2015) for clinical trials using device modalities following arthroscopic knee surgery: cryotherapy, continuous passive motion (CPM), neuromuscular electrical stimulation (NMES), surface electromyographic (sEMG) biofeedback and shockwave therapy (ESWT)...
October 1, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
Sofiene Bouali, Nidhal Maatar, Asma Bouhoula, Khansa Abderrahmen, Imed Ben Said, Adnen Boubaker, Jalel Kallel, Hafedh Jemel
PURPOSE: The spinal epidural angiolipomas are rare expansive processes made of mature lipomatous and angiomatous elements. They often have a benign character. Their etiology, pathogenesis remains uncertain, and it is a cause of spinal cord compression. The magnetic resonance imaging is the most important neuroradiological examination. Histological examination is the only examination to confirm the diagnosis. Surgery is the treatment of choice. METHODS: A retrospective study of all patients operated on for a spinal epidural angiolipoma at the Department of Neurosurgery at the National Institute of Neurology of Tunis between January 2000 and December 2014 (15 years) was performed...
October 2016: Asian Journal of Neurosurgery
A C Moore, D L Burris
OBJECTIVE: During exercise, cartilage recovers interstitial fluid lost during inactivity, which explains how tissue thickness and joint space are maintained over time. This recovery phenomenon is currently explained by a combination of osmotic swelling during intermittent bath exposure and sub-ambient pressurization during unloading. This paper tests an alternate hypothesis that cartilage can retain and recover interstitial fluid in the absence of bath exposure and unloading when physiological hydrodynamics are present...
September 30, 2016: Osteoarthritis and Cartilage
Katharine E Reed, Amanda L White, Spiros Logothetis, Christopher J McManus, Gavin R H Sandercock
OBJECTIVES: Compression garments are used by athletes in attempts to enhance performance and recovery, although evidence to support their use is equivocal. Reducing the exertion experienced during exercise may encourage sedentary individuals to increase physical activity. The aim of this study was to assess the effect of compression garments on walking performance (self-paced and enforced pace) and rate of perceived exertion (RPE) in adults who presented with two or more CVD risk factors...
September 20, 2016: Journal of Science and Medicine in Sport
Claudio E Tatsui, Telmo A B Belsuzarri, Marilou Oro, Laurence D Rhines, Jing Li, Amol J Ghia, Behrang Amini, Heron Espinoza, Paul D Brown, Ganesh Rao
OBJECTIVE An emerging paradigm for treating patients with epidural spinal cord compression (ESCC) caused by metastatic tumors is surgical decompression and stabilization, followed by stereotactic radiosurgery. In the setting of rapid progressive disease, interruption or delay in return to systemic treatment can lead to a negative impact in overall survival. To overcome this limitation, the authors introduce the use of spinal laser interstitial thermotherapy (sLITT) in association with percutaneous spinal stabilization to facilitate a rapid return to oncological treatment...
October 2016: Neurosurgical Focus
Ziyong Xu, Zhi Li, Jian Li
The modulated wideband converter (MWC) is a kind of sub-Nyquist sampling system which is developed from compressed sensing theory. It accomplishes highly accurate broadband sparse signal recovery by multichannel sub-Nyquist sampling sequences. However, when the number of sparse sub-bands becomes large, the amount of sampling channels increases proportionally. Besides, it is very hard to adjust the number of sampling channels when the sparsity changes, because its undersampling board is designed by a given sparsity...
2016: Sensors
Tae Hyun Kim, Yoon Ha, Jun Jae Shin, Yong Eun Cho, Ji Hae Lee, Woo Ho Cho
Patients with intramedullary signal intensity (SI) changes have a poor prognosis after surgical decompression in cervical compressive myelopathy (CCM); however, some patients show no clear relationship between the SI and postsurgical prognosis. This discrepancy may be because no comprehensive and proper quantitative evaluation exists to assess SI on magnetic resonance imaging (MRI). The purpose of this study was prospectively to evaluate the correlation between the clinical features, neurological outcome of patients with CCM, and the quantitative assessment of SI changes preoperatively and postoperatively, and the correlation with SI severity...
September 2016: Medicine (Baltimore)
Güliz Acker, Ulf C Schneider, Zarko Grozdanovic, Peter Vajkoczy, Johannes Woitzik
BACKGROUND: Disc herniations are only reported in few case reports as a rare cause of acute spinal ischemia. A surgical treatment has not been described so far in these reports with analysis of diffusion weighted magnetic resonance imaging (DWI/MRI) before and after surgery. The aim of our study is to report a case of cervical spinal cord ischemia caused by cervical disc herniation and discuss the literature concerning diagnostic and treatment options. METHODS: A 72-year-old female patient developed an acute progressive tetraparesis with emphasis on the upper extremities...
June 2016: J Spine Surg
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