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https://www.readbyqxmd.com/read/29049394/electrical-impedance-myography-detects-age-related-muscle-change-in-mice
#1
W David Arnold, Rebecca S Taylor, Jia Li, Janice A Nagy, Benjamin Sanchez, Seward B Rutkove
Loss of muscle mass and strength represents one of the most significant contributors to impaired function in older adults. Convenient and non-invasive biomarkers are needed that can readily identify and track age-related muscle change. Previous data has suggested electrical impedance myography (EIM) has the potential to serve in this capacity. In this study we investigated how changes in EIM compared with other standard measures of muscle structure and function in aged compared with young mice. A total of 19 male mice aged approximately 25 months and 19 male mice aged 3 months underwent surface multifrequency EIM of the right gastrocnemius muscle using standard methods...
2017: PloS One
https://www.readbyqxmd.com/read/29044452/effects-of-alpha-lipoic-acid-on-motor-function-and-antioxidant-enzyme-activity-of-nerve-tissue-after-sciatic-nerve-crush-injury-in-rats
#2
Sarper Kocaoğlu, Özgür Aktaş, Oğuzhan Zengi, Azmi Tufan, Feyza Karagöz Güzey
AIM: Background: Alpha lipoic acid (ALA) that is a strong antioxidant drug is tried for both protection and treatment of various diseases of central and peripheral nervous systems. MATERIAL AND METHODS: Material and Methods: Protective effects of ALA on crush type peripheral nerve injury were evaluated. 28 Sprague-Dawley rats were divided into four groups: In Group 1, sciatic nerve was only explored. Sciatic nerve crush injury was performed after serum physiologic injection intraperitoneally in Group 2, and after ALA injection in Groups 3 and 4...
August 31, 2017: Turkish Neurosurgery
https://www.readbyqxmd.com/read/29039642/self-powered-nanocomposites-under-an-external-rotating-magnetic-field-for-non-invasive-external-power-supply-electrical-stimulation
#3
Fengluan Wu, Long Jin, Xiaotong Zheng, Bingyun Yan, Pandeng Tang, Huikai Yang, Weili Deng, Weiqing Yang
Electrical stimulation in biology and gene expression has attracted considerable attention in recent years. However, it is inconvenient that the electric stimulation needs to be supplied an implanted power-transported wire connecting the external power supply. Here, we fabricated a self-powered composite nanofiber (CNF) and developed an electric generating system to realize electrical stimulation based on the electromagnetic induction effect under an external rotating magnetic field. The self-powered CNFs generating an electric signal consist of modified MWNTs (m-MWNTs) coated Fe3O4/PCL fibers...
October 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29038875/sclerotherapy-for-rectal-varices-by-a-small-bore-needle-puncture-through-the-greater-sciatic-foramen
#4
Shuji Kariya, Miyuki Nakatani, Takuji Maruyama, Yasuyuki Ono, Yutaka Ueno, Hiroshi Shimizu, Atsushi Komemushi, Noboru Tanigawa
PURPOSE: To report a sclerotherapy technique for rectal varices consisting of direct puncture of the superior rectal vein with a small-bore sheathed needle via the greater sciatic foramen without insertion of a sheath or catheter. MATERIALS AND METHODS: The subjects of this retrospective study were three consecutive patients who underwent embolization of rectal varices, two for rupture of rectal varices and one for hepatic encephalopathy and hyperammonemia. A 5% solution of ethanolamine oleate with iodinated contrast agent (5% EOI) was injected through puncture of the superior rectal vein and carried in the blood flow, after which n-butyl cyanoacrylate mixed with lipiodol (NBCA-Lip) was immediately injected to stop the blood flow...
October 16, 2017: Cardiovascular and Interventional Radiology
https://www.readbyqxmd.com/read/29038874/ultrasound-guided-popliteal-sciatic-block-provides-adequate-analgesia-during-urgent-endovascular-treatment-of-critical-limb-ischemia-with-resting-pain
#5
Derya Tureli, Sinan Deniz, Aytekin Unlukaplan, Levent Oguzkurt
PURPOSE: To demonstrate feasibility and safety of ultrasound-guided popliteal sciatic nerve block for providing analgesia during urgent endovascular treatment of critical limb ischemia with resting pain. MATERIALS AND METHODS: Ultrasound-guided popliteal sciatic blocks were performed by an interventional radiologist in angiography suite immediately prior to commencement of urgent endovascular treatment of 30 critical limb ischemia patients. Subjective pain levels prior to and following sciatic block were assessed using the visual analog scale (VAS)...
October 16, 2017: Cardiovascular and Interventional Radiology
https://www.readbyqxmd.com/read/29037799/thermography-as-an-early-predictive-measurement-for-evaluating-epidural-and-femoral-sciatic-block-success-in-dogs
#6
Nina Küls, Karen J Blissitt, Darren J Shaw, Gudrun Schöffmann, Richard E Clutton
OBJECTIVE: To evaluate skin temperature increase as an early predictive measure for evaluating epidural and femoral-sciatic block success in dogs. STUDY DESIGN: Prospective clinical trial. ANIMALS: A total of 29 dogs undergoing orthopaedic surgery on one hindlimb. METHODS: Dogs were anaesthetized and placed into lateral recumbency with the affected limb uppermost and the coat was clipped. Baseline infrared thermographic images (T0) of the affected limb, of the paw pad of the affected leg and of the ipsilateral paw pad were taken...
March 25, 2017: Veterinary Anaesthesia and Analgesia
https://www.readbyqxmd.com/read/29036889/single-administration-of-melatonin-modulates-the-nitroxidergic-system-at-the-peripheral-level-and-reduces-thermal-nociceptive-hypersensitivity-in-neuropathic-rats
#7
Elisa Borsani, Barbara Buffoli, Veronica Bonazza, Russel J Reiter, Rita Rezzani, Luigi F Rodella
Neuropathic pain is a severe condition with unsatisfactory treatments. Melatonin, an indolamine, seems to be a promising molecule suitable for this purpose due to its well-known anti-inflammatory, analgesic, and antioxidant effects, as well as its modulation of the nitroxidergic system. Nevertheless, the data on its mechanism of action and potentialities are currently insufficient in this pathology, especially at the peripheral level. Thus, this work evaluated the effect of a single administration of melatonin in an established mononeuropathy pain model that monitors the behaviour and the changes in the nitroxidergic system in dorsal root ganglia and skin, which are affected by nervous impairment...
October 14, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29035937/ultrasound-detection-of-arteria-comitans-a-novel-technique-to-locate-the-sciatic-nerve
#8
Hesham Elsharkawy, Babak Kateby Kashy, Rovnat Babazade, Andrew T Gray
In the gluteal and thigh region, the arteria comitans accompanies the sciatic nerve for a short distance, then penetrates the nerve and runs to the lower part of the thigh. There is no study that recognizes this artery as a guide to the location of the sciatic nerve. In this report, we describe a series of 6 knee arthroplasty patients in whom ultrasound-guided sciatic nerve block was successfully performed using color Doppler and pulsed wave Doppler to visualize the arteria comitans as a guide to the location of the sciatic nerve...
October 13, 2017: Regional Anesthesia and Pain Medicine
https://www.readbyqxmd.com/read/29034961/a-randomized-trial-of-automated-intermittent-ropivacaine-administration-vs-continuous-infusion-in-an-interscalene-catheter
#9
J Oxlund, A H Clausen, S Venø, M D Nielsen, M Pall, T Strøm, P Toft
BACKGROUND: Ultrasound-guided interscalene nerve block with ropivacaine as local anesthetic agent given as boluses or continuous infusion is the preferred pain management after major shoulder surgery. The use of automated intermittent boluses has been shown to be superior to continuous infusion in sciatic and epidural nerve block. HYPOTHESIS: Automated intermittent boluses reduce pain after major shoulder surgery. METHODS: Seventy patients aged 18-75 years, scheduled for major shoulder surgery under general anesthesia with interscalene nerve block were included in this randomized controlled trial...
October 16, 2017: Acta Anaesthesiologica Scandinavica
https://www.readbyqxmd.com/read/29034020/persistent-sciatic-artery-aneurysm-with-limb-ischemia-a-report-of-two-cases
#10
Koichi Morisaki, Terutoshi Yamaoka, Kazuomi Iwasa, Sosei Kuma, Jin Okazaki
We report two cases of persistent sciatic artery (PSA) aneurysm with limb ischemia. Physicians who treat peripheral artery disease should be aware that PSA is a very rare congenital malformation of the lower extremities that is potentially hazardous, and that revascularization should be performed when a PSA aneurysm is treated.
March 24, 2017: Annals of Vascular Diseases
https://www.readbyqxmd.com/read/29033603/application-of-the-chronic-constriction-injury-of-the-partial-sciatic-nerve-model-to-assess-acupuncture-analgesia
#11
Mu-Jun Zhi, Kun Liu, Zhou-Li Zheng, Xun He, Tie Li, Guang Sun, Meng Zhang, Fu-Chun Wang, Xin-Yan Gao, Bing Zhu
PURPOSE: To validate and explore the application of a rat model of chronic constriction injury to the partial sciatic nerve in investigation of acupuncture analgesia. METHODS: Chronic constriction injury of the sciatic nerve (CCI) and chronic constriction injury of the partial sciatic nerve (CCIp) models were generated by ligating either the sciatic nerve trunk or its branches in rats. Both models were evaluated via paw mechanical withdrawal latency (PMWL), paw mechanical withdrawal threshold (PMWT), nociceptive reflex-induced electromyogram (C-fiber reflex EMG), and dorsal root ganglion immunohistochemistry...
2017: Journal of Pain Research
https://www.readbyqxmd.com/read/29032027/peripheral-neuropathy-and-hindlimb-paralysis-in-a-mouse-model-of-adipocyte-specific-knockout-of-lkb1
#12
Yan Xiong, Jessica C Page, Naagarajan Narayanan, Chao Wang, Zhihao Jia, Feng Yue, Xine Shi, Wen Jin, Keping Hu, Meng Deng, Riyi Shi, Tizhong Shan, Gongshe Yang, Shihuan Kuang
Brown adipose tissues (BAT) burn lipids to generate heat through uncoupled respiration, thus representing a powerful target to counteract lipid accumulation and obesity. The tumor suppressor liver kinase b1 (Lkb1) is a key regulator of cellular energy metabolism; and adipocyte-specific knockout of Lkb1 (Ad-Lkb1 KO) leads to the expansion of BAT, improvements in systemic metabolism and resistance to obesity in young mice. Here we report the unexpected finding that the Ad-Lkb1 KO mice develop hindlimb paralysis at mid-age...
September 21, 2017: EBioMedicine
https://www.readbyqxmd.com/read/29030674/magnetic-resonance-neurography-normal-values-and-demographic-determinants-of-nerve-caliber-and-t2-relaxometry-in-60-healthy-individuals
#13
Moritz Kronlage, Véronique Schwehr, Daniel Schwarz, Tim Godel, Sabine Heiland, Martin Bendszus, Philipp Bäumer
PURPOSE: To establish normal values and to identify demographic determinants of quantitative biomarkers in magnetic resonance neurography (MRN). METHODS: In this study 60 healthy individuals (5 men and 5 women of every decade between 20 and 80 years) were examined according to a standardized MRN protocol at 3 T, including multiecho T2 relaxometry. Nerve cross-sectional area (CSA), transverse relaxation time (T2), and proton spin density (PSD) were assessed for the sciatic, tibial, median, ulnar, and radial nerves...
October 13, 2017: Clinical Neuroradiology
https://www.readbyqxmd.com/read/29027771/two-different-placement-paths-in-popliteal-fossa-with-a-novel-nerve-block-needle-with-external-indwelling-cannula-for-postoperative-analgesia-after-foot-and-ankle-surgery-a-randomized-controlled-trial
#14
Miao He, Dandan Ling, Guang-Yu Cai, Tian-Xiao Zou, Bin Yu
BACKGROUND: Previous studies have documented that single injection nearby the sciatic nerve bifurcation would influence the anesthesia and analgesia effect. But this is uncertain for preoperative continuous popliteal sciatic nerve block. So we conducted this trial to compare two paths (proximal to the bifurcation and at the bifurcation) of ultrasound guided continuous popliteal sciatic nerve block in foot and ankle surgery. METHODS: 40 recruited objects were randomly assigned to receive ultrasound-guided continuous popliteal sciatic nerve block at the puncture path proximal to the nerve bifurcation either at the nerve bifurcation...
October 12, 2017: Minerva Anestesiologica
https://www.readbyqxmd.com/read/29027690/ultrasound-guided-posterior-femoral-cutaneous-nerve-block-a-cadaveric-study
#15
Christopher S Johnson, Rebecca L Johnson, Adam D Niesen, David E Stoike, Wojciech Pawlina
OBJECTIVES: To identify any anatomic barriers to local anesthetic spread between the sciatic nerve (SN) and the posterior femoral cutaneous nerve (PFCN) at the level of the infragluteal crease and to describe a potential technique for an ultrasound (US)-guided subgluteal PFCN block in a cadaveric model. METHODS: Bilateral US-guided subgluteal injections of a colored latex solution were performed around the SN (15 mL) and PFCN (10 mL) in 4 unembalmed cadavers, for a total of 8 cadaver thighs...
October 13, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/29027186/novel-technique-for-intraoperative-sciatic-nerve-assessment-in-complex-primary-total-hip-arthroplasty-a-pilot-study
#16
Shai S Shemesh, Jonathan Robinson, Samuel Overley, Michael J Bronson, Calin S Moucha, Darwin Chen
INTRODUCTION: Sciatic nerve injury (SNI) is a potentially devastating complication after total hip arthroplasty (THA). Intraoperative neural monitoring has been found in several studies to be useful in preventing SNI, but can be difficult to implement. In this study, we examine the results of using a handheld nerve stimulator for intraoperative sciatic nerve (SN) monitoring during complex THA requiring limb lengthening and/or significant manipulation of the SN. METHODS: A consecutive series of 11 cases (9 patients, 11 hips) with either severe developmental dysplasia of the hip (Crowe 3-4) or other underlying conditions requiring complex hip reconstruction involving significant leg lengthening and/or nerve manipulation...
October 9, 2017: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/29026428/evaluation-of-the-physiological-activity-of-venom-from-the-eurasian-water-shrew-neomys-fodiens
#17
Krzysztof Kowalski, Paweł Marciniak, Grzegorz Rosiński, Leszek Rychlik
BACKGROUND: Animal toxins can have medical and therapeutic applications. Principally, toxins produced by insects, arachnids, snakes and frogs have been characterized. Venomous mammals are rare, and their venoms have not been comprehensively investigated. Among shrews, only the venom of Blarina brevicauda has been analysed so far, and blarina toxin has been proven to be its main toxic component. It is assumed that Neomys fodiens employs its venom to hunt larger prey. However, the toxic profile, properties and mode of action of its venom are largely unknown...
2017: Frontiers in Zoology
https://www.readbyqxmd.com/read/29025656/dual-delivery-of-vegf-and-ngf-by-emulsion-electrospun-nanofibrous-scaffold-for-peripheral-nerve-regeneration
#18
Bin Xia, Yonggang Lv
Controlled delivery of multiple therapeutic agents can be considered an effective approach in nerve injury due to its multifunction. In this study, recombinant human vascular endothelial growth factor (VEGF) and recombinant human nerve growth factor (NGF) were loaded on the surface and in the core of emulsion electrospun poly (l-lactic acid) (PLLA) nanofibrous scaffold, respectively. The in vitro studies showed that VEGF and NGF had a sequential release pattern in which most of the VEFG was released in the first few days but the NGF could be continuously released for >1month...
January 1, 2018: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/29024435/efect-of-longitudinally-oriented-collagen-conduit-combined-with-nerve-growth-factor-on-nerve-regeneration-after-dog-sciatic-nerve-injury
#19
Yao Yao, Yi Cui, Yannan Zhao, Zhifeng Xiao, Xing Li, Sufang Han, Bing Chen, Yongxiang Fang, Piao Wang, Juli Pan, Jianwu Dai
The research on artificial nerve conduits has become a focus of study in peripheral nerve reconstruction so as a possible replacement for the treatment of autologous nerve grafts in clinics. In this study, we used longitudinally oriented collagen conduit (LOCC) combined with nerve growth factor (NGF) to reconstruct long distance of sciatic nerve defects (35 mm) in adult dog model. The long term follow-up evaluation demonstrated that the LOCC/NGF conduit allowed functional and morphological nerve regeneration at the transection site of the injured sciatic nerve...
October 10, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/29022773/native-paraneurial-tissue-and-paraneurial-adhesions-alter-nerve-strain-distribution-in-rat-sciatic-nerves
#20
Ian M Foran, Vincent Hussey, Rushil A Patel, Jaemyoung Sung, Sameer B Shah
Paraneurial adhesions have been implicated in the pathological progression of entrapment neuropathies. Surgical decompression of adhesions is often performed, with the intent of restoring nerve kinematics. The normal counterpart of adhesions, native paraneurium, is also thought to influence nerve deformation and mobility. However, influences of native or abnormal paraneurial structures on nerve kinematics have not been investigated. We measured regional strains in rat sciatic nerves before and immediately after decompression of native paraneurial tissue, and before and after decompression of abnormal paraneurial adhesions, which formed within 6 weeks of the initial decompression...
January 1, 2017: Journal of Hand Surgery, European Volume
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