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Sciatic block

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https://www.readbyqxmd.com/read/29054488/the-histone-demethylase-jmjd2a-regulates-the-expression-of-bdnf-and-mediates-neuropathic-pain-in-mice
#1
Junfei Zhou, Fang Wang, Chang Xu, Zipeng Zhou, Wei Zhang
JMJD2A is a JmjC histone demethylase that catalyzes the demethylation of di- and trimethylated Lys9 and Lys36 in histone H3 (H3K9me2/3 and H3K36me2/3). The role of spinal JMJD2A-dependent histone demethylation in nociception hypersensitivity development remains elusive. Here we reported that the JMJD2A responded to neuropathic pain and participated in the maintenance of neuropathic pain. The mRNA and protein levels of Jmjd2a were significantly increased in the neurons of mouse undergoing neuropathic pain induced by sciatic nerve chronic constrictive injury (CCI) or unilateral spared nerve injury (SNI)...
October 17, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/29053076/protective-effect-of-biodegradable-nerve-conduit-against-peripheral-nerve-adhesion-after-neurolysis
#2
Kosuke Shintani, Takuya Uemura, Kiyohito Takamatsu, Takuya Yokoi, Ema Onode, Mitsuhiro Okada, Hiroaki Nakamura
OBJECTIVE Peripheral nerve adhesion caused by extraneural and intraneural scar formation after neurolysis leads to nerve dysfunction. The authors previously developed a novel very flexible biodegradable nerve conduit composed of poly(L-lactide) and poly(ε-caprolactone) for use in peripheral nerve regeneration. In the present study, they investigated the effect of protective nerve wrapping on preventing adhesion in a rat sciatic nerve adhesion model. METHODS Rat sciatic nerves were randomly assigned to one of the following four groups: a no-adhesion group, which involved neurolysis alone without an adhesion procedure; an adhesion group, in which the adhesion procedure was performed after neurolysis, but no treatment was subsequently administered; a nerve wrap group, in which the adhesion procedure was performed after neurolysis and protective nerve wrapping was then performed with the nerve conduit; and a hyaluronic acid (HA) group, in which the adhesion procedure was performed after neurolysis and nerve wrapping was then performed with a 1% sodium HA viscous solution...
October 20, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/29051083/lysophosphatidic-acid-propagates-post-injury-schwann-cell-dedifferentiation-through-lpa1-signaling
#3
Fabian Szepanowski, Leon-Phillip Szepanowski, Anne K Mausberg, Christoph Kleinschnitz, Bernd C Kieseier, Mark Stettner
Lysophosphatidic acid (LPA) is a pleiotropic signaling lipid that acts as ligand for at least six specific G-protein coupled receptors. Schwann cells (SC) are known to mainly express the LPA1 receptor subtype. An emerging body of evidence has linked LPA with injury-induced peripheral nerve demyelination as well as neuropathic pain. However, the molecular mechanisms underlying its demyelinating effect have not been conclusively elucidated. We aimed to decipher the demyelinating effect in vitro as well as in vivo by studying markers of SC differentiation and dedifferentiation: Myelinated dorsal root ganglia (DRG) cultures were treated either with LPA, LPA plus AM095 (LPA1 antagonist) or vehicle...
October 16, 2017: Neuroscience Letters
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
#4
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
#5
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/29035937/ultrasound-detection-of-arteria-comitans-a-novel-technique-to-locate-the-sciatic-nerve
#6
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
#7
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/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
#8
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
#9
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/28975684/salvinorin-a-reduces-neuropathic-nociception-in-the-insular-cortex-of-the-rat
#10
U Coffeen, A Canseco-Alba, K Simón-Arceo, A Almanza, F Mercado, M León-Olea, F Pellicer
BACKGROUND: Neuropathic pain is one of the most important challenges in public health. The search for novel treatments is important for an adequate relief without adverse effects. In this sense salvinorin A (SA), the main diterpene of the medicinal plant Salvia divinorum is an important antinociceptive compound, which acts as a potent agonist of kappa opioid receptor (KOR) and cannabinoid CB1 receptors. METHODS: We evaluated nociceptive responses in a neuropathic pain model induced by the sciatic nerve ligature (SNL) in the right hind paw, after the microinjection of SA, Salvinorin B (SB), KOR and CB1 antagonists directly in the insular cortex (IC) in male wistar rats...
October 4, 2017: European Journal of Pain: EJP
https://www.readbyqxmd.com/read/28922231/use-of-regional-anesthesia-for-outpatient-surgery-within-the-united-states-a-prevalence-study-using-a-nationwide-database
#11
Rodney A Gabriel, Brian M Ilfeld
BACKGROUND: Regional anesthesia is of benefit for outpatient surgery given its demonstrated improvement in analgesia and decrease in complications, resulting in shorter average recovery room times and lower hospital readmission rates. Unfortunately, there are few epidemiological studies outlining the overall utilization of peripheral nerve blocks (PNBs) in this setting. Therefore, the primary objective of this study was to report the overall utilization of several types of PNBs among all candidate cases in the outpatient setting within the United States...
September 14, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28913502/regional-anesthesia-for-a-total-knee-arthroplasty-on-an-adult-patient-with-spastic-diplegia-and-an-intrathecal-baclofen-pump
#12
Elird Bojaxhi, David R Salek, Courtney E Sherman, Roy A Greengrass
We describe the clinical presentation of a patient with spastic diplegia, and its unique perioperative challenges. Opioids and antispasmodic medications are the primary therapy for managing pain and spasticity in the perioperative setting. However, such combination results in several side-effects and their sedative properties are synergistic. A 64-year-old woman with a history of spastic diplegia and an intrathecal baclofen pump for the treatment of her lower extremity spasticity was scheduled for a third elective left knee arthroplasty...
April 2017: Rom J Anaesth Intensive Care
https://www.readbyqxmd.com/read/28912683/nano-scale-biophysical-and-structural-investigations-on-intact-and-neuropathic-nerve-fibers-by-simultaneous-combination-of-atomic-force-and-confocal-microscopy
#13
Gonzalo Rosso, Ivan Liashkovich, Peter Young, Victor Shahin
The links between neuropathies of the peripheral nervous system (PNS), including Charcot-Marie-Tooth1A and hereditary neuropathy with liability to pressure palsies, and impaired biomechanical and structural integrity of PNS nerves remain poorly understood despite the medical urgency. Here, we present a protocol describing simultaneous structural and biomechanical integrity investigations on isolated nerve fibers, the building blocks of nerves. Nerve fibers are prepared from nerves harvested from wild-type and exemplary PNS neuropathy mouse models...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28904214/after-nerve-injury-lineage-tracing-shows-that-myelin-and-remak-schwann-cells-elongate-extensively-and-branch-to-form-repair-schwann-cells-which-shorten-radically-on-remyelination
#14
Jose A Gomez-Sanchez, Kjara S Pilch, Milou van der Lans, Shaline V Fazal, Cristina Benito, Laura J Wagstaff, Rhona Mirsky, Kristjan R Jessen
There is consensus that, distal to peripheral nerve injury, myelin and Remak cells reorganize to form cellular columns, Bungner's bands, which are indispensable for regeneration. However, knowledge of the structure of these regeneration tracks has not advanced for decades and the structure of the cells that form them, denervated or repair Schwann cells, remains obscure. Furthermore, the origin of these cells from myelin and Remak cells and their ability to give rise to myelin cells after regeneration has not been demonstrated directly, although these conversions are believed to be central to nerve repair...
September 13, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28886259/addition-of-dexmedetomidine-to-qx-314-enhances-the-onset-and-duration-of-sciatic-nerve-block-in-rats
#15
Wenling Zhao, Qinqin Yin, Jin Liu, Wensheng Zhang, Linghui Yang
An experimental set-up was designed to observe whether adding dexmedetomidine to QX-314 would enhance the onset and duration of sensory and motor function in a rat sciatic nerve block model. Fifty-six Sprague-Dawley rats received unilateral sciatic nerve blocks with 0.2 ml of 35 mM QX-314 alone, dexmedetomidine (5.3 μM [1 μg•kg-1], 26.4 μM [5 μg•kg-1], 52.8 μM [10 μg•kg-1]) alone, or a combination of the two. Thermal nociception and motor function were assessed by a blinded investigator, sciatic nerves and perineural tissues were harvested at 14 days after injection...
September 8, 2017: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/28881313/lc-ms-ms-method-for-preclinical-pharmacokinetic-study-of-qx-oh-a-novel-long-acting-local-anesthetic-in-sciatic-nerve-blockade-in-rats
#16
YuJun Zhang, DeYing Gong, QingShan Zheng, Jin Liu, WenSheng Zhang
QX-OH, a new synthetic local anesthetic, produced concentration-dependent, reversible, and long-acting local anesthesia in animal models, with moderate local toxicity. As part of preclinical research for drug development, we developed and validated a method for the determination of QX-OH in the plasma, muscle, and sciatic nerve using liquid chromatography-mass spectrometry. After a simple protein precipitation procedure, analysis was performed on an Extend C18 column (100mm×3mm, 3.5μm) by isocratic elution with 0...
July 29, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28862159/temporary-persistence-of-conduction-block-after-prolonged-kilohertz-frequency-alternating-current-khfac-on-rat-sciatic-nerve
#17
Narendra Bhadra, Emily Foldes, Tina Vrabec, Kevin L Kilgore, Niloy Bhadra
Application of Kilohertz Frequency Alternating Current (KHFAC) waveforms can result in nerve conduction block that is induced in less than a second. Conduction recovers within seconds when KHFAC is applied for about 5 - 10 minutes. This study investigated the effect of repeated and prolonged application of KHFAC on rat Sciatic nerve with bipolar platinum electrodes. Approach: Varying durations of KHFAC at signal amplitudes for conduction block with intervals of no stimulus were studied. Nerve conduction was monitored by recording peak Gastrocnemius muscle force utilizing stimulation electrodes proximal (PS) and distal (DS) to a blocking electrode...
September 1, 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/28858839/axonal-excitability-and-conduction-alterations-caused-by-levobupivacaine-in-rat
#18
Seçkin Tuncer, Tülay Tuncer Peker, İlksen Burat, Erhan Kiziltan, Barkin İlhan, Nizamettin Dalkiliç
In this study, effects of the long-acting amide-type local anesthetic levobupivacaine on axonal conduction and excitability parameters of the rat sciatic nerve were thoroughly examined both in vitro and in vivo. In order to deduce its effects on isolated nerve conduction, compound nerve action potential (CNAP) recordings were performed using the suction method over sciatic nerves of Wistar rats before and after administration of 0.05 % (1.7 mmol L-1) levobupivacaine. Levobupivacaine caused complete CNAP area and amplitude depression by blocking conduction in a time-dependent manner...
September 1, 2017: Acta Pharmaceutica
https://www.readbyqxmd.com/read/28771790/motoneuron-activity-is-required-for-enhancements-in-functional-recovery-after-peripheral-nerve-injury-in-exercised-female-mice
#19
Poonam B Jaiswal, Jack K Tung, Robert E Gross, Arthur W English
Inhibitory luminopsins (iLMO2) integrate opto- and chemo-genetic approaches and allow for cell-type specific inhibition of neuronal activity. When exposed to a Renilla luciferase substrate, Coelenterazine (CTZ), iLMO2 generates bioluminescence-mediated activation of its amino-terminal halorhodopsin, resulting in neuronal inhibition. Moderate daily exercise in the form of interval treadmill-training (IT) applied following a peripheral nerve injury results in enhanced motor axon regeneration and muscle fiber reinnervation in female mice...
August 3, 2017: Journal of Neuroscience Research
https://www.readbyqxmd.com/read/28757853/ultrasound-guided-adductor-and-sciatic-nerve-block-two-in-one-approach-at-mid-thigh-level
#20
Amarjeet Kumar, Chandni Sinha, Ajeet Kumar, Poonam Kumari
No abstract text is available yet for this article.
July 2017: Saudi Journal of Anaesthesia
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