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https://www.readbyqxmd.com/read/28340660/severe-crush-injury-to-the-forearm-and-hand-the-role-of-microsurgery
#1
REVIEW
Francisco Del Piñal, Esteban Urrutia, Maciej Klich
The main goals of treating severe crush injuries are debriding away devitalized tissue and filling any resultant dead space with vascularized tissue. In the authors' experience, the most ideal methods for soft tissue coverage in treating crush injuries are the iliac flap, the adipofascial lateral arm flap, and the gracilis flap. Accompanying bone defects respond very well to free corticoperiosteal flaps. Digital defects often require the use of complete or subtotal toe transfer to avoid amputation and restore function to the hand...
April 2017: Clinics in Plastic Surgery
https://www.readbyqxmd.com/read/28336261/methane-rescues-retinal-ganglion-cells-and-limits-retinal-mitochondrial-dysfunction-following-optic-nerve-crush
#2
Ruobing Wang, Qinglei Sun, Fangzhou Xia, Zeli Chen, Jiangchun Wu, Yuelu Zhang, Jiajun Xu, Lin Liu
Secondary degeneration is a common event in traumatic central nervous system disorders, which involves neuronal apoptosis and mitochondrial dysfunction. Exogenous methane exerts the therapeutic effects in many organ injury. Our study aims to investigate the potential neuroprotection of methane in a rat model of optic nerve crush (ONC). Adult male Sprague-Dawley rats were subjected to ONC and administrated intraperitoneally with methane-saturated or normal saline (10 ml/kg) once per day for one week after ONC...
March 20, 2017: Experimental Eye Research
https://www.readbyqxmd.com/read/28333077/an-overview-of-the-protective-effects-of-chitosan-and-acetylated-chitosan-oligosaccharides-against-neuronal-disorders
#3
REVIEW
Cui Hao, Wei Wang, Shuyao Wang, Lijuan Zhang, Yunliang Guo
Chitin is the second most abundant biopolymer on Earth and is mainly comprised of a marine invertebrate, consisting of repeating β-1,4 linked N-acetylated glucosamine units, whereas its N-deacetylated product, chitosan, has broad medical applications. Interestingly, chitosan oligosaccharides have therapeutic effects on different types of neuronal disorders, including, but not limited to, Alzheimer's disease, Parkinson's disease, and nerve crush injury. A common link among neuronal disorders is observed at a sub-cellular level, such as atypical protein assemblies and induced neuronal death...
March 23, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28328632/use-of-processed-nerve-allografts-to-repair-nerve-injuries-greater-than-25-mm-in-the-hand
#4
Brian Rinker, Jozef Zoldos, Renata V Weber, Jason Ko, Wesley Thayer, Jeffrey Greenberg, Fraser J Leversedge, Bauback Safa, Gregory Buncke
Processed nerve allografts (PNAs) have been demonstrated to have improved clinical results compared with hollow conduits for reconstruction of digital nerve gaps less than 25 mm; however, the use of PNAs for longer gaps warrants further clinical investigation. Long nerve gaps have been traditionally hard to study because of low incidence. The advent of the RANGER registry, a large, institutional review board-approved, active database for PNA (Avance Nerve Graft; AxoGen, Inc, Alachua, FL) has allowed evaluation of lower incidence subsets...
March 21, 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/28324115/regenerative-responses-and-axon-pathfinding-of-retinal-ganglion-cells-in-chronically-injured-mice
#5
Benjamin J Yungher, Márcio Ribeiro, Kevin K Park
Purpose: Enhanced regeneration of retinal ganglion cell (RGC) axons can be achieved by modification of numerous neuronal-intrinsic factors. However, axon growth initiation and the pathfinding behavior of these axons after traumatic injury remain poorly understood outside of acute injury paradigms, despite the clinical relevance of more chronic settings. We therefore examined RGC axon regeneration following therapeutic delivery that is postponed until 2 months after optic nerve crush injury...
March 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28323803/patient-response-to-an-integrated-orthotic-and-rehabilitation-initiative-for-traumatic-injuries-the-prioriti-mtf-study
#6
Joseph R Hsu, Johnny G Owens, Jennifer DeSanto, John R Fergason, Kevin M Kuhn, Benjamin K Potter, Daniel J Stinner, Robert G Sheu, Sandra L Waggoner, Jason M Wilken, Yanjie Huang, Daniel O Scharfstein, Ellen J MacKenzie
Although limb salvage is now possible for many high-energy open fractures and crush injuries to the distal tibia, ankle, hindfoot, and midfoot, orthotic options are limited. The Intrepid Dynamic Exoskeletal Orthosis (IDEO) is a custom, energy-storing carbon fiber orthosis developed for trauma patients undergoing limb salvage. The IDEO differs from other orthoses in that it allows patients with ankle weakness to have more normal ankle biomechanics and increased ankle power. This article describes the design of a study to evaluate the effectiveness of the IDEO when delivered together with a high-intensity, sports medicine-based approach to rehabilitation...
April 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28322446/increased-long-term-risk-of-hearing-loss-in-patients-with-traumatic-brain-injury-a-nationwide-population-based-study
#7
Wei-Chuan Shangkuan, Hung-Che Lin, Cheng-Ping Shih, Chun-An Cheng, Hueng-Chuen Fan, Chi-Hsiang Chung, Fu-Huang Lin, Chang-Huei Tsao, Wu-Chien Chien
OBJECTIVES/HYPOTHESIS: We investigated incidences of hearing loss among patients with traumatic brain injury (TBI) to evaluate whether they had a higher risk of hearing loss than the general population. STUDY DESIGN: Cohort study. METHODS: Inpatient data from the Taiwan National Health Insurance Research Database from January 1, 2000 to December 31, 2010 were recorded. Patients with TBI and a retrospective comparison cohort were analyzed. Each subject was individually traced from their index date to identify subjects who subsequently received a diagnosis of hearing loss...
March 21, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28318829/toll-like-receptor-4-inhibitor-protects-against-retinal-ganglion-cell-damage-induced-by-optic-nerve-crush-in-mice
#8
Yukimichi Nakano, Masamitsu Shimazawa, Kazuki Ojino, Hiroshi Izawa, Hiroto Takeuchi, Yuki Inoue, Kazuhiro Tsuruma, Hideaki Hara
Toll-like receptor 4 (TLR4) plays key roles in innate immune responses and inflammatory reactions. TAK-242 (resatorvid) is a small-molecule cyclohexene derivative that selectively inhibits TLR4 signaling pathways and suppresses inflammatory reactions. Here we investigated the protective effects of TAK-242 against optic nerve crush (ONC) which induces axonal injury like glaucoma in mice. TAK-242 was injected intravitreally immediately after ONC. The effect of TAK-242 was evaluated by measuring the number of fluorogold-labeled retinal ganglion cells (RGCs) at 10 days after ONC...
March 2, 2017: Journal of Pharmacological Sciences
https://www.readbyqxmd.com/read/28314941/neuropeptide-expression-and-morphometric-differences-in-crushed-alveolar-inferior-nerve-of-rats-effects-of-photobiomodulation
#9
Daniel Oliveira Martins, Fabio Martinez Dos Santos, Adriano Polican Ciena, Ii-Sei Watanabe, Luiz Roberto G de Britto, José Benedito Dias Lemos, Marucia Chacur
Inferior alveolar nerve (IAN) injuries may occur during various dental routine procedures, especially in the removal of impacted lower third molars, and nerve recovery in these cases is a great challenge in dentistry. Here, the IAN crush injury model was used to assess the efficacy of photobiomodulation (PBM) in the recovery of the IAN in rats following crushing injury (a partial lesion). Rats were divided into four experimental groups: without any procedure, IAN crush injury, and IAN crush injury with PBM and sham group with PBM...
March 17, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28293917/increasing-calcium-level-limits-schwann-cell-numbers-in-vitro-following-peripheral-nerve-injury
#10
Kai J Yang, Yuhui Yan, Lin-Ling Zhang, Michael A Agresti, Hani S Matloub, John A LoGiudice, Robert Havlik, Ji-Geng Yan
Background After peripheral nerve injury, there is an increase in calcium concentration in the injured nerves. Our previous publications have shown that increase in calcium concentration correlated well with degree of nerve injury and that local infusion of calcitonin has a beneficial effect on nerve recovery. Schwann cells play a pivotal role in regeneration and recovery. We aim to examine cultured Schwann cell survivals in various concentrations of calcium-containing growth media and the effect of calcitonin in such media...
March 14, 2017: Journal of Reconstructive Microsurgery
https://www.readbyqxmd.com/read/28293529/facial-nerve-recovery-in-kbdb-and-c1q-knockout-mice-a-role-for-histocompatibility-complex-1
#11
Seden Akdagli, Ryan A Williams, Hyun J Kim, Yuling Yan, Mirna Mustapha, Sam P Most
BACKGROUND: Understanding the mechanisms in nerve damage can lead to better outcomes for neuronal rehabilitation. The purpose of our study was to assess the effect of major histocompatibility complex I deficiency and inhibition of the classical complement pathway (C1q) on functional recovery and cell survival in the facial motor nucleus (FMN) after crush injury in adult and juvenile mice. METHODS: A prospective blinded analysis of functional recovery and cell survival in the FMN after a unilateral facial nerve crush injury in juvenile and adult mice was undertaken between wild-type, C1q knockout (C1q-/-), and KbDb knockout (KbDb-/-) groups...
December 2016: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/28283336/tissue-engineering-with-peripheral-blood-derived-mesenchymal-stem-cells-promotes-the-regeneration-of-injured-peripheral-nerves
#12
Mengjie Pan, Xianghai Wang, Yijing Chen, Shangtao Cao, Jinkun Wen, Guofeng Wu, Yuanyuan Li, Lixia Li, Changhui Qian, Zhenqi Qin, Zhenlin Li, Dandan Tan, Zhihao Fan, Wutian Wu, Jiasong Guo
Peripheral nerve injury repair can be enhanced by Schwann cell (SC) transplantation, but clinical applications are limited by the lack of a cell source. Thus, alternative systems for generating SCs are desired. Herein, we found the peripheral blood-derived mesenchymal stem cells (PBMSCs) could be induced into SC like cells with expressing SC-specific markers (S100, P75NTR and CNPase) and functional factors (NGF, NT-3, c-Fos, and Krox20). When the induced PBMSCs (iPBMSCs) were transplanted into crushed rat sciatic nerves, they functioned as SCs by wrapping the injured axons and expressing myelin specific marker of MBP...
March 7, 2017: Experimental Neurology
https://www.readbyqxmd.com/read/28270745/chaperone-proteins-in-the-central-nervous-system-and-peripheral-nervous-system-after-nerve-injury
#13
REVIEW
Shalina S Ousman, Ariana Frederick, Erin-Mai F Lim
Injury to axons of the central nervous system (CNS) and the peripheral nervous system (PNS) is accompanied by the upregulation and downregulation of numerous molecules that are involved in mediating nerve repair, or in augmentation of the original damage. Promoting the functions of beneficial factors while reducing the properties of injurious agents determines whether regeneration and functional recovery ensues. A number of chaperone proteins display reduced or increased expression following CNS and PNS damage (crush, transection, contusion) where their roles have generally been found to be protective...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28264555/the-effect-of-insulin-like-growth-factor-1-on-recovery-of-facial-nerve-crush-injury
#14
Asuman Feda Bayrak, Yuksel Olgun, Ayla Ozbakan, Safiye Aktas, Can Ahmet Kulan, Gonca Kamaci, Emine Demir, Osman Yilmaz, Levent Olgun
Objectives: The aim of this study is to investigate the efficacy of locally applied insulin-like growth factor 1 (IGF-1) on the recovery of facial nerve functions after crush injury in a rabbit model. Methods: The rabbits were randomly assigned into three groups. Group 1 consisted of the rabbits with crush injury alone; group 2, the animals applied saline solution onto the crushed facial nerve and group 3, IGF-1 implemented to the nerve in the same manner. Facial nerve injury was first electrophysiologically studied on 10th and 42nd days of the procedure...
March 8, 2017: Clinical and Experimental Otorhinolaryngology
https://www.readbyqxmd.com/read/28261743/lllt-actives-mmp-2-and-increases-muscle-mechanical-resistance-after-nerve-sciatic-rat-regeneration
#15
Rodrigo Antonio Carvalho Andraus, Luciana Prado Maia, Anderson Diogo de Souza Lino, Karen Barron Parron Fernandes, Marcos Vinícius de Matos Gomes, Rinaldo Roberto de Jesus Guirro, Cláudio Henrique Barbieri
The purpose of this study was to analyze the low-level laser therapy (LLLT) on metalloproteinase expression and the mechanical strength of skeletal muscle regeneration after peripheral nerve injury. Rats were subjected to crush injury of the right sciatic nerve, followed by LLLT (830 nm, 35, 70, 140, and 280 J/cm(2)) for 21 consecutive days. Functional gait analysis was performed at weekly intervals and the animals were sacrificed after the last evaluation at day 21 for collection of the gastrocnemius muscles, which were submitted to analysis of resistance, and the tibialis anterior, for evaluation of metalloproteinase-2 (MMP-2)...
March 6, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28260272/lisfranc-injuries
#16
Sacha Wynter, Cameron Grigg
BACKGROUND: Injury to the tarsometatarsal joint is a relatively rare occurrence that is commonly missed, leading to debilitating outcomes. For this reason, it is considered a red flag in general practice. OBJECTIVE: This article reviews the current literature on tarsometatarsal injuries and describes clinical assessment, imaging and management. DISCUSSION: Lisfranc injuries refer to the displacement of the metatarsals from the tarsus, with special attention placed on the second tarsometa-tarsal joint and Lisfranc ligament...
March 2017: Australian Family Physician
https://www.readbyqxmd.com/read/28252568/time-course-of-inflammatory-gene-expression-following-crush-injury-in-murine-skeletal-muscle
#17
Joachim G Voss, Ayelet Goldshmid Shagal, Joyce M Tsuji, James W MacDonald, Theo K Bammler, Fred M Farin, Barbara St Pierre Schneider
BACKGROUND: Early inflammation and secretion of proinflammatory cytokines such as IL-1β, IL-6, and TNF-α act as the key drivers to regulate inflammation after muscle injury. However, the effects of these key proinflammatory drivers in a noninvasive crush injury model are not well known. Understanding these effects is important for treating crush injuries that occur during natural disasters and military conflicts. PURPOSE: We studied the timed mRNA expression of IL-1β, IL-6, and TNF-α in a noninvasive murine crush injury model to further understand their impact on proinflammatory cytokine pathways that are activated within the first 48 hours after a crush muscle injury...
March 2017: Nursing Research
https://www.readbyqxmd.com/read/28251838/is-hyperbaric-oxygen-therapy-indispensable-for-saving-mutilated-hand-injuries
#18
I-Han Chiang, Yuan-Sheng Tzeng, Shun-Cheng Chang
Mutilated hand injuries are a profound challenge to the plastic surgeon, and such injuries often lead to limb loss and severe functional impairment. Hyperbaric oxygen therapy (HBOT) appears to counteract tissue hypoxia and stimulate acute wound healing. This study was performed to evaluate the efficacy of HBOT as an adjunctive therapy in patients with a mutilated hand injury. Between January 2006 and December 2014, 45 patients with a mutilated hand injury were enrolled. After reconstruction or revascularisation, patients underwent 120 minutes of HBOT with oxygen at 2·5 atmospheres absolute while breathing 100% oxygen...
March 1, 2017: International Wound Journal
https://www.readbyqxmd.com/read/28251151/electrospun-nanofibers-loaded-with-quercetin-promote-the-recovery-of-focal-entrapment-neuropathy-in-a-rat-model-of-streptozotocin-induced-diabetes
#19
Chonlathip Thipkaew, Jintanaporn Wattanathorn, Supaporn Muchimapura
In this study, quercetin-loaded zein-based nanofibers were developed using electrospinning technique. The therapeutic effect of these quercetin-loaded nanofibers on neuropathy in streptozotocin- (STZ-) induced diabetes in rats was assessed. Diabetic condition was induced in male Wistar rats by STZ, after which a crush injury of the right sciatic nerve was performed to induce mononeuropathy. Functional recovery was assessed using walking track analysis, measurements of foot withdrawal reflex, nerve conduction velocity, and morphological analysis...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28235897/neto2-assembles-with-kainate-receptors-in-drg-neurons-during-development-and-modulates-neurite-outgrowth-in-adult-sensory-neurons
#20
Claire G Vernon, Geoffrey T Swanson
Peripheral sensory neurons in the dorsal root ganglia (DRG) are the initial transducers of sensory stimuli, including painful stimuli, from the periphery to central sensory and pain-processing centers. Small- to medium-diameter non-peptidergic neurons in the neonatal DRG express functional kainate receptors (KARs), one of three sub-families of ionotropic glutamate receptors, as well as the putative KAR auxiliary subunit Neto2. Neto2 markedly alters recombinant KAR function but has yet to be confirmed as an auxiliary subunit that assembles with and alters function of endogenous KARs...
February 24, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
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