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https://www.readbyqxmd.com/read/28726563/mechanically-strong-and-ph-responsive-carboxymethyl-chitosan-graphene-oxide-polyacrylamide-nanocomposite-hydrogels-with-fast-recoverability
#1
Yang Chen, Hongqiu Wang, Junrong Yu, Yan Wang, Jing Zhu, Zuming Hu
The biocompatible, quickly recoverable, mechanically strong and tough polymer hydrogels has great potential for biomedical applications. A novel carboxymethyl chitosan (CMCTs)/graphene oxide (GO)/polyacrylamide (PAM) nanocomposite (NC) hydrogel with excellent mechanical performance was synthesized through a facile, one-pot free radical polymerization, using GO nanosheets as the crosslink centers instead of toxic organic molecules. The content of GO nanosheets and CMCTs has great influence on the mechanical properties of CMCTs/GO/PAM NC hydrogels...
July 20, 2017: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/28718615/development-of-nanofiber-sponges-containing-nerve-guidance-conduit-for-peripheral-nerve-regeneration-in-vivo
#2
Binbin Sun, Zi-Fei Zhou, Tong Wu, Weiming Chen, Dawei Li, Hao Zheng, Hany El-Hamshary, Salem S Al-Deyab, Xiumei Mo, Yinxian Yu
In the study of hollow nerve guidance conduit (NGC), the dispersion of regenerated axons always confused the researchers. To address this problem, filler-containing NGC was prepared, which showed better effect in the application of nerve tissue engineering. In this study, nanofiber sponges with abundant macro-pores, high porosity, and superior compressive strength were fabricated by electrospinning and freeze-drying. Poly (l-lactic acid-co-ε-caprolactone)/silk fibroin (PLCL/SF) nanofiber sponges were used as filler to prepare three-dimensional nanofiber sponges-containing (NS-containing) NGC...
July 18, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28716393/combine-effect-of-chondroitinase-abc-and-low-level-laser-660nm-on-spinal-cord-injury-model-in-adult-male-rats
#3
Atousa Janzadeh, Arash Sarveazad, Mahmoud Yousefifard, Sima Dameni, Fazel Sahraneshin Samani, Kobra Mokhtarian, Farinaz Nasirinezhad
After spinal cord injury (SCI) there are many recoveries inhibiting factors such as chondroitin sulfate proteoglycan (CSPG) and inflammation. The present study investigated the combinational effect of low level laser therapy (LLLT) as anti-inflammatory agent and Chondroitinase ABC (ChABC) enzyme as CSPG digesting factor on spinal cord after injury. This study performed on 44 male Wistar rats, spinal cord injury induced by a clip compression injury. Animals received two-weeks treatment of 660nm low level laser (LLL) and intraspinal injection of 1μg ChABC...
July 14, 2017: Neuropeptides
https://www.readbyqxmd.com/read/28712480/bee-venom-acupuncture-reduces-interleukin-6-increases-interleukin-10-and-induces-locomotor-recovery-in-a-model-of-spinal-cord-compression
#4
Raquel Nascimento de Souza, Fernanda Kohn Silva, Magda Alves de Medeiros
Spinal cord injuries (SCIs) initiate a series of molecular and cellular events in which inflammatory responses can lead to major neurological dysfunctions. The present study aims to investigate whether bee venom (BV) acupuncture applied at acupoints ST36 (Zusanli) and GV3 (Yaoyangquan) could minimize locomotor deficits and the magnitude of neural tissue losses, and change the balance between pro- and anti-inflammatory cytokines after an SCI by compression. Wistar rats were subjected to an SCI model by compression in which a 2-French Fogarty embolectomy catheter was inflated in the extradural space...
June 2017: Journal of Acupuncture and Meridian Studies
https://www.readbyqxmd.com/read/28711563/application-of-neurite-orientation-dispersion-and-density-imaging-or-diffusion-tensor-imaging-to-quantify-the-severity-of-cervical-spondylotic-myelopathy-and-assess-postoperative-neurological-recovery
#5
Genki Okita, Tetsuro Ohba, Tomohiro Takamura, Shigeto Ebata, Ryo Ueda, Hiroshi Onishi, Hirotaka Haro, Masaaki Hori
BACKGROUND CONTEXT: Surgical outcome and the severity of cervical spondylotic myelopathy (CSM) are unpredictable and cannot be estimated by conventional anatomical MRI. The utility of diffusion tensor imaging (DTI) to quantify the severity of CSM and assess postoperative neurological recovery has been investigated. However, whether conventional DTI should be applied in a clinical setting remains controversial. Neurite orientation dispersion and density imaging (NODDI) is a recently introduced model-based diffusion-weighted MRI technique that quantifies specific microstructural features related directly to neuronal morphology...
July 12, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28706598/a-fractional-flow-reserve-guidewire-causing-longitudinal-stent-compression-and-successful-recovery
#6
Metzdorf Pierre-Adrien, Maigrat Charles-Henri, Popovic Batric, Camenzind Edoardo
Longitudinal stent deformation (LSD) is a rare complication but can occur during coronary intervention. We report a case with LSD of the distal edge, documented by an optical coherence tomography investigation and successfully recovered.
April 2017: Heart Views: the Official Journal of the Gulf Heart Association
https://www.readbyqxmd.com/read/28689485/therapeutic-ultrasound-after-sciatic-nerve-compression-of-wistar-rats
#7
Gladson Ricardo Flor Bertolini, Jhenifer Karvat, Camila Mayumi Martin Kakihata, Lucinéia de Fátima Chasko Ribeiro, Rose Meire Costa Brancalhão
OBJECTIVES: The present study analyzed the effect of therapy with therapeutic ultrasound on the sciatic nerve after compression injury, comparing two similar doses of SATA. METHODS: In total, 32 Wistar rats were used, divided into the following groups: CG - control; IG - compression injury of the sciatic nerve; IGCU - injury and continuous ultrasound; and IGPU - injury and 20% pulsed ultrasound. The treatment with ultrasound started on the 3rd postoperative day, with a frequency of 1 MHz, 0...
July 8, 2017: Neurological Research
https://www.readbyqxmd.com/read/28688799/trephination-mini-craniectomy-for-traumatic-posterior-fossa-epidural-hematomas-in-selected-pediatric-patients
#8
Han-Song Sheng, Chao-Guo You, Liang Yang, Nu Zhang, Jian Lin, Fen-Chun Lin, Mao-De Wang
PURPOSE: Posterior fossa epidural hematomas (PFEDH) are uncommon in children but usually require timely surgical intervention due to the risk of life-threatening brainstem compression. We attempt to make the surgical procedure less invasive by treating selected pediatric patients with trephination mini-craniectomy. METHODS: We retrospectively reviewed the clinical courses, radiological findings, surgical procedures, and prognoses of the pediatric patients who were treated in our departments for traumatic PFEDH from January 2010 to January 2015...
June 22, 2017: Chinese Journal of Traumatology, Zhonghua Chuang Shang za Zhi
https://www.readbyqxmd.com/read/28682936/effects-of-wearing-a-compression-garment-during-night-sleep-on-recovery-from-high-intensity-eccentric-concentric-quadriceps-muscle-fatigue
#9
Yohei Shimokochi, Satoshi Kuwano, Taichi Yamaguchi, Hiroyuki Abutani, Norihiro Shima
This study aimed to investigate the effects of wearing a compression garment (CG) during night sleep on muscle fatigue recovery after high-intensity eccentric and concentric knee extensor exercises. Seventeen college male students participated in two experimental sessions under CG and non-CG (NCG) wearing conditions. Before night sleep under CG or NCG wearing conditions, the subjects performed a fatiguing protocol consisting of 10 sets of 10 repetitions of maximal isokinetic eccentric and concentric knee extensor contractions, with 30-second rest intervals between the sets...
July 3, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28682242/low-rank-enhanced-matrix-recovery-of-hybrid-time-and-frequency-data-in-fast-magnetic-resonance-spectroscopy
#10
Hengfa Lu, Xinlin Zhang, Tianyu Qiu, Jian Yang, Jiaxi Ying, Di Guo, Zhong Chen, Xiaobo Qu
GOAL: The two dimensional magnetic resonance spectroscopy (MRS) possesses many important applications in bio-engineering but suffers from long acquisition duration. Nonuniform sampling has been applied to the spatiotemporally encoded ultrafast MRS, but results in missing data in the hybrid time and frequency plane. An approach is proposed to recover this missing signal, of which enables high quality spectrum reconstruction. METHODS: The natural exponential characteristic of MRS is exploited to recover the hybrid time and frequency signal...
June 29, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28680078/3d-printed-silicones-with-shape-memory
#11
Amanda S Wu, Ward Small Iv, Taylor M Bryson, Emily Cheng, Thomas R Metz, Stephanie E Schulze, Eric B Duoss, Thomas S Wilson
Direct ink writing enables the layer-by-layer manufacture of ordered, porous structures whose mechanical behavior is driven by architecture and material properties. Here, we incorporate two different gas filled microsphere pore formers to evaluate the effect of shell stiffness and Tg on compressive behavior and compression set in siloxane matrix printed structures. The lower Tg microsphere structures exhibit substantial compression set when heated near and above Tg, with full structural recovery upon reheating without constraint...
July 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28674872/efficacy-of-wearing-compression-garments-during-post-exercise-period-after-two-repeated-bouts-of-strenuous-exercise-a-randomized-crossover-design-in-healthy-active-males
#12
Kazushige Goto, Sahiro Mizuno, Ayaka Mori
BACKGROUND: The efficacy of wearing [a] compression garment (CG) between repeated bouts of exercise within a same day has not been fully understood. The present study determined the effect of wearing a CG after strenuous exercise sessions (consisting of sprint exercise, resistance exercise, drop jump) twice a day on exercise performance, muscle damage, and inflammatory responses. METHODS: Eleven physically active males (age, 22.7 ± 0.9 years; height, 175...
December 2017: Sports Medicine—Open
https://www.readbyqxmd.com/read/28672271/the-fabrication-and-characterization-of-barium-titanate-akermanite-nano-bio-ceramic-with-a-suitable-piezoelectric-coefficient-for-bone-defect-recovery
#13
H Shokrollahi, F Salimi, A Doostmohammadi
In recent years, due to the controllable mechanical properties and degradation rate, calcium silicates such as akermanite (Ca2MgSi2O7) with Ca-Mg and Si- containing bio-ceramics have received much more attention. In addition, the piezoelectric effect plays an important role in bone growth, remodeling and defect healing. To achieve our objective, the porous bioactive nano-composite with a suitable piezoelectric coefficient was fabricated by the freeze-casting technique from the barium titanate and nano-akermanite (BT/nAK) suspension...
June 22, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28671304/fast-precise-and-accurate-myocardial-t1-mapping-using-a-radial-molli-sequence-with-flash-readout
#14
B Marty, B Coppa, P G Carlier
PURPOSE: Quantitative cardiac MRI, and more particularly T1 mapping, has become a most important modality to characterize myocardial tissue. In this work, the value of a radial variant of the conventional modified Look-Locker inversion recovery sequence (raMOLLI) is demonstrated. METHODS: The raMOLLI acquisition scheme consisted of five radial echo trains of 80 spokes acquired using either a fast low-angle shot (FLASH) or a true fast imaging with steady-state-precession (TrueFISP) readout at different time points after a single magnetization inversion...
July 3, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28668558/early-rehabilitation-after-lumbar-disc-surgery-is-not-effective-or-cost-effective-compared-to-no-referral-a-randomised-trial-and-economic-evaluation
#15
Teddy Oosterhuis, Raymond W Ostelo, Johanna M van Dongen, Wilco C Peul, Michiel R de Boer, Judith E Bosmans, Carmen L Vleggeert-Lankamp, Mark P Arts, Maurits W van Tulder
QUESTION: Is referral for early rehabilitation after lumbar disc surgery effective and cost-effective compared to no referral? DESIGN: Multicentre, randomised, controlled trial, and economic evaluation with concealed allocation and intention-to-treat-analysis. PARTICIPANTS: Adults who underwent discectomy for a herniated lumbar disc, confirmed by magnetic resonance imaging, and signs of nerve root compression corresponding to the herniation level...
July 2017: Journal of Physiotherapy
https://www.readbyqxmd.com/read/28666884/bioinspired-coupled-helical-coils-for-soft-tissue-engineering-of-tubular-structures-improved-mechanical-behavior-of-tubular-collagen-type-i-templates
#16
H P Janke, J Bohlin, R M L M Lomme, S M Mihaila, J Hilborn, W F J Feitz, E Oosterwijk
The design of constructs for tubular tissue engineering is challenging. Most biomaterials need to be reinforced with supporting structures such as knittings, meshes or electrospun material to comply with the mechanical demands of native tissues. In this study, coupled helical coils (CHCs) were manufactured to mimic collagen fiber orientation as found in nature. Monofilaments of different commercially available biodegradable polymers were wound and subsequently fused, resulting in right-handed and left-handed polymer helices fused together in joints where the filaments cross...
June 27, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28665866/intracranial-aneurysms-of-neuro-ophthalmologic-relevance
#17
Jonathan A Micieli, Nancy J Newman, Daniel L Barrow, Valérie Biousse
BACKGROUND: Intracranial saccular aneurysms are acquired lesions that often present with neuro-ophthalmologic symptoms and signs. Recent advances in neurosurgical techniques, endovascular treatments, and neurocritical care have improved the optimal management of symptomatic unruptured aneurysms, but whether the chosen treatment has an impact on neuro-ophthalmologic outcomes remains debated. EVIDENCE ACQUISITION: A review of the literature focused on neuro-ophthalmic manifestations and treatment of intracranial aneurysms with specific relevance to neuro-ophthalmologic outcomes was conducted using Ovid MEDLINE and EMBASE databases...
June 29, 2017: Journal of Neuro-ophthalmology: the Official Journal of the North American Neuro-Ophthalmology Society
https://www.readbyqxmd.com/read/28662152/does-external-pneumatic-compression-treatment-between-bouts-of-overreaching-resistance-training-sessions-exert-differential-effects-on-molecular-signaling-and-performance-related-variables-compared-to-passive-recovery-an-exploratory-study
#18
Cody T Haun, Michael D Roberts, Matthew A Romero, Shelby C Osburn, Christopher B Mobley, Richard G Anderson, Michael D Goodlett, David D Pascoe, Jeffrey S Martin
PURPOSE: We sought to compare the effects of external pneumatic compression (EPC) and sham when used concurrently with resistance training on performance-related outcomes and molecular measures related to recovery. METHODS: Twenty (N = 20) resistance-trained male participants (aged 21.6±2.4 years) were randomized to balanced sham or EPC intervention groups. The protocol consisted of 3 consecutive days of heavy, voluminous back squat exercise followed by EPC/sham treatment (Days2-4) and 3 consecutive days of recovery (Days5-7) with EPC/sham only on Days5-6...
2017: PloS One
https://www.readbyqxmd.com/read/28660373/cervical-laminectomy-of-limited-width-prevents-postoperative-c5-palsy-a-multivariate-analysis-of-263-muscle-preserving-posterior-decompression-cases
#19
Satoshi Nori, Ryoma Aoyama, Ken Ninomiya, Junichi Yamane, Kazuya Kitamura, Seiji Ueda, Tateru Shiraishi
PURPOSE: Between 2006 and 2010, we performed wide laminectomy (wide LAM) alone, with decompression performed between the bilateral medial margin of the zygapophyseal joints, or double-door laminoplasty (DL) combined with wide LAM for cervical compressive myelopathy (CCM). From 2010, instead of wide LAM and DL, we began to perform narrow LAM, where the laminectomy width was no more than 2-3 mm wider than the spinal cord width (SW). This study aimed to elucidate the risk factors for C5 palsy by reviewing surgical outcomes...
June 28, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28660328/radiological-study-of-the-secondary-reduction-effect-of-early-functional-exercise-on-displaced-intra-articular-calcaneal-fractures-after-internal-compression-fixation
#20
Wei Chen, Bo Liu, Hongzhi Lv, Yanling Su, Xiao Chen, Yanbin Zhu, Chenguang Du, Xiaolin Zhang, Yingze Zhang
PURPOSE: Early post-operative exercise and weight-bearing activities are found to improve the functional recovery of patients with displaced intra-articular calcaneal fractures (DIACFs). We hypothesized that early functional exercise after surgery might have a secondary reduction effect on the subtalar joint, in particular the smaller fracture fragments that were not fixed firmly. A prospective study was conducted to verify this hypothesis. METHODS: From December 2012 to September 2013, patients with unilateral DIACFs were enrolled and received a treatment consisting of percutaneous leverage and minimally invasive fixation...
June 28, 2017: International Orthopaedics
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