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Peripheral nerve blockade

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https://www.readbyqxmd.com/read/28585187/a-brca1-dependent-dna-damage-response-in-the-regenerating-adult-peripheral-nerve-milieu
#1
Anand Krishnan, Kaylynn Purdy, Ambika Chandrasekhar, Jose Martinez, Chu Cheng, Douglas W Zochodne
It is not generally appreciated that DNA repair machinery has a critical role in the remodeling of neurons that adopt a regenerative phenotype. We identified that breast cancer 1 (BRCA1)-dependent DNA activity, previously well known to repair cancer cells, is active in adult peripheral neurons and Schwann cells during their injury and regeneration response. Temporary or partial loss of BRCA1 or blockade of its intraneuronal nuclear entry impaired outgrowth in neurons in vitro and impacted nerve regeneration and functional recovery in vivo...
June 5, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28546014/-anesthetic-requirements-measured-by-bilateral-bispectral-analysis-and-femoral-blockade-in-total-knee-arthroplasty
#2
Maylin Koo, Javier Bocos, Antoni Sabaté, Vinyet López, Carmina Ribes
BACKGROUND AND OBJECTIVES: A continuous peripheral nerve blockade has proved benefits on reducing postoperative morphine consumption; the combination of a femoral blockade and general anesthesia on reducing intraoperative anesthetic requirements has not been studied. The objective of this study was to determine the relevance of timing in the performance of femoral block to intraoperative anesthetic requirements during general anesthesia for total knee arthroplasty. METHODS: A single-center, prospective cohort study on patients scheduled for total knee arthroplasty, were sequentially allocated to receive 20mL of 2% mepivacaine throughout a femoral catheter, prior to anesthesia induction (Preoperative) or when skin closure started (Postoperative)...
May 22, 2017: Revista Brasileira de Anestesiologia
https://www.readbyqxmd.com/read/28545594/early-blockade-of-joint-inflammation-with-a-fatty-acid-amide-hydrolase-inhibitor-decreases-end-stage-osteoarthritis-pain-and-peripheral-neuropathy-in-mice
#3
Jason J McDougall, Milind M Muley, Holly T Philpott, Allison Reid, Eugene Krustev
BACKGROUND: The endocannabinoid system has been shown to reduce inflammatory flares and pain in rodent models of arthritis. A limitation of endocannabinoids is that they are rapidly denatured by hydrolysing enzymes such as fatty acid amide hydrolase (FAAH) which renders them physiologically inert. Osteoarthritis (OA) is primarily a degenerative joint disease; however, it can incorporate mild inflammation and peripheral neuropathy. The aim of this study was to determine whether early blockade of FAAH bioactivity could reduce OA-associated inflammation and joint neuropathy...
May 25, 2017: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/28534510/targeting-group-i-p21-activated-kinases-to-control-malignant-peripheral-nerve-sheath-tumor-growth-and-metastasis
#4
G Semenova, D S Stepanova, C Dubyk, E Handorf, S M Deyev, A J Lazar, J Chernoff
Malignant peripheral nerve sheath tumors (MPNSTs) are devastating sarcomas for which no effective medical therapies are available. Over 50% of MPSNTs are associated with mutations in NF1 tumor suppressor gene, resulting in activation of Ras and its effectors, including the Raf/Mek/Erk and PI3K/Akt/mTORC1 signaling cascades, and also the WNT/β-catenin pathway. As Group I p21-activated kinases (Group I Paks, PAK1/2/3) have been shown to modulate Ras-driven oncogenesis, we asked if these enzymes might regulate signaling in MPNSTs...
May 22, 2017: Oncogene
https://www.readbyqxmd.com/read/28514241/phrenic-nerve-palsy-and-regional-anesthesia-for-shoulder-surgery-anatomical-physiologic-and-clinical-considerations
#5
Kariem El-Boghdadly, Ki Jinn Chin, Vincent W S Chan
Regional anesthesia has an established role in providing perioperative analgesia for shoulder surgery. However, phrenic nerve palsy is a significant complication that potentially limits the use of regional anesthesia, particularly in high-risk patients. The authors describe the anatomical, physiologic, and clinical principles relevant to phrenic nerve palsy in this context. They also present a comprehensive review of the strategies for reducing phrenic nerve palsy and its clinical impact while ensuring adequate analgesia for shoulder surgery...
July 2017: Anesthesiology
https://www.readbyqxmd.com/read/28494088/peripheral-nerve-blocks-for-hip-fractures
#6
REVIEW
Joanne Guay, Martyn J Parker, Richard Griffiths, Sandra Kopp
BACKGROUND: Various nerve blocks with local anaesthetic agents have been used to reduce pain after hip fracture and subsequent surgery. This review was published originally in 1999 and was updated in 2001, 2002, 2009 and 2017. OBJECTIVES: This review focuses on the use of peripheral nerves blocks as preoperative analgesia, as postoperative analgesia or as a supplement to general anaesthesia for hip fracture surgery. We undertook the update to look for new studies and to update the methods to reflect Cochrane standards...
May 11, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28489477/combined-sciatic-and-lumbar-plexus-nerve-blocks-for-the-analgesic-management-of-hip-arthroscopy-procedures-a-retrospective-review
#7
J Douglas Jaffe, Theodore Ross Morgan, Gregory B Russell
Hip arthroscopy is a minimally invasive alternative to open hip surgery. Despite its minimally invasive nature, there can still be significant reported pain following these procedures. The impact of combined sciatic and lumbar plexus nerve blocks on postoperative pain scores and opioid consumption in patients undergoing hip arthroscopy was investigated. A retrospective analysis of 176 patients revealed that compared with patients with no preoperative peripheral nerve block, significant reductions in pain scores to 24 hours were reported and decreased opioid consumption during the post anesthesia care unit (PACU) stay was recorded; no significant differences in opioid consumption out to 24 hours were discovered...
June 2017: Journal of Pain & Palliative Care Pharmacotherapy
https://www.readbyqxmd.com/read/28489210/sugammadex-ed90-dose-to-reverse-the-rocuronium-neuromuscular-blockade-in-obese-patients
#8
Mauro Prado DA Silva, Christiano Matsui, Daniel Dongiou Kim, Joaquim Edson Vieira, Carlos Alberto Malheiros, Ligia Andrade Silva Telles Mathias
Objective: to determine the ED90 (minimum effective dose in 90% of patients) of sugammadex for the reversal of rocuronium-induced moderate neuromuscular blockade (NMB) in patients with grade III obesity undergoing bariatric surgery. Methods: we conducted a prospective study with the biased coin up-and-down sequential design. We chosen the following doses: 2.0mg/Kg, 2.2mg/Kg, 2.4mg/Kg, 2.6mg/Kg, 2.8mg/Kg. The complete reversal of rocuronium-induced NMB considered a T4/T1 ratio ≥0...
January 2017: Revista do Colégio Brasileiro de Cirurgiões
https://www.readbyqxmd.com/read/28475556/high-concentrations-of-tranexamic-acid-inhibit-ionotropic-glutamate-receptors
#9
Irene Lecker, Dian-Shi Wang, Kirusanthy Kaneshwaran, C David Mazer, Beverley A Orser
BACKGROUND: The antifibrinolytic drug tranexamic acid is structurally similar to the amino acid glycine and may cause seizures and myoclonus by acting as a competitive antagonist of glycine receptors. Glycine is an obligatory co-agonist of the N-methyl-D-aspartate (NMDA) subtype of glutamate receptors. Thus, it is plausible that tranexamic acid inhibits NMDA receptors by acting as a competitive antagonist at the glycine binding site. The aim of this study was to determine whether tranexamic acid inhibits NMDA receptors, as well as α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid and kainate subtypes of ionotropic glutamate receptors...
July 2017: Anesthesiology
https://www.readbyqxmd.com/read/28458631/inhibition-of-mitochondrial-p53-accumulation-by-pft-%C3%AE-prevents-cisplatin-induced-peripheral-neuropathy
#10
Magdalena A Maj, Jiacheng Ma, Karen N Krukowski, Annemieke Kavelaars, Cobi J Heijnen
Chemotherapy-induced peripheral neuropathy (CIPN), a debilitating major side effect of cancer treatment, is characterized by pain and sensory loss in hand and feet. Platinum-based chemotherapeutics like cisplatin frequently induce CIPN. The molecular mechanism underlying these neurotoxic symptoms is incompletely understood and there are no preventive or curative interventions. We hypothesized that cisplatin acts as a cellular stressor that triggers p53 accumulation at mitochondria, leading to mitochondrial dysfunction and CIPN...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28452816/tetrodotoxin-epinephrine-and-chemical-permeation-enhancer-combinations-in-peripheral-nerve-blockade
#11
Claudia M Santamaria, Changyou Zhan, J Brian McAlvin, David Zurakowski, Daniel S Kohane
BACKGROUND: Chemical permeation enhancers (CPEs) have the potential to improve nerve blockade by site 1 sodium channel blockers such as tetrodotoxin (TTX). Here, we investigated the efficacy and toxicity of CPE-enhanced nerve blockade across a range of TTX concentrations using 2 CPEs (sodium octyl sulfate and octyl trimethyl ammonium bromide). We also tested the hypothesis that CPEs could be used to reduce the concentrations of TTX and/or of a second adjuvant drug (in this case, epinephrine) needed to achieve prolonged local anesthesia METHODS:: Sprague-Dawley rats were injected at the sciatic nerve with combinations of TTX and CPEs, with and without epinephrine...
June 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28438966/mediation-of-movement-induced-breakthrough-cancer-pain-by-ib4-binding-nociceptors-in-rats
#12
Joshua Havelin, Ian Imbert, Devki Sukhtankar, Bethany Remeniuk, Ian Pelletier, Jonathan Gentry, Alec Okun, Timothy Tiutan, Frank Porreca, Tamara E King
Cancer-induced bone pain is characterized by moderate to severe ongoing pain that commonly requires the use of opiates. Even when ongoing pain is well controlled, patients can suffer breakthrough pain (BTP), episodic severe pain that "breaks through" the medication. We developed a novel model of cancer-induced BTP using female rats with mammary adenocarcinoma cells sealed within the tibia. We demonstrated previously that rats with bone cancer learn to prefer a context paired with saphenous nerve block to elicit pain relief (i...
May 17, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28430692/lack-of-association-between-the-use-of-nerve-blockade-and-the-risk-of-postoperative-chronic-opioid-use-among-patients-undergoing-total-knee-arthroplasty-evidence-from-the-marketscan-database
#13
Eric C Sun, Brian T Bateman, Stavros G Memtsoudis, Mark D Neuman, Edward R Mariano, Laurence C Baker
BACKGROUND: Total knee arthroplasty (TKA) is associated with high rates of prolonged opioid use after surgery (10%-34%). By decreasing opioid use in the immediate postoperative period, perioperative nerve blockade has been hypothesized to decrease the risk of persistent opioid use. METHODS: Using health care utilization data, we constructed a sample of 120,080 patients undergoing TKA between 2002 and 2012 and used billing data to identify the utilization of peripheral or neuraxial blockade...
April 19, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28405806/rearrangement-of-potassium-ions-and-kv1-1-kv1-2-potassium-channels-in-regenerating-axons-following-end-to-end-neurorrhaphy-ionic-images-from-tof-sims
#14
Chiung-Hui Liu, Hung-Ming Chang, Tsung-Huan Wu, Li-You Chen, Yin-Shuo Yang, To-Jung Tseng, Wen-Chieh Liao
The voltage-gated potassium channels Kv1.1 and Kv1.2 that cluster at juxtaparanodal (JXP) regions are essential in the regulation of nerve excitability and play a critical role in axonal conduction. When demyelination occurs, Kv1.1/Kv1.2 activity increases, suppressing the membrane potential nearly to the equilibrium potential of K(+), which results in an axonal conduction blockade. The recovery of K(+)-dependent communication signals and proper clustering of Kv1.1/Kv1.2 channels at JXP regions may directly reflect nerve regeneration following peripheral nerve injury...
April 12, 2017: Histochemistry and Cell Biology
https://www.readbyqxmd.com/read/28383293/peripheral-nerve-block-as-a-supplement-to-light-or-deep-general-anesthesia-in-elderly-patients-receiving-total-hip-arthroplasty-a-prospective-randomized-study
#15
Bin Mei, Hanning Zha, Xiaolong Lu, Xinqi Cheng, Shishou Cheng, Xuesheng Liu, Yuanhai Li, Erwei Gu
BACKGROUND: Peripheral nerve block combined with general anesthesia is a preferable anesthesia method for elderly patients receiving hip arthroplasty. The depth of sedation may influence patient recovery. Therefore, we aimed to investigate the influence of peripheral nerve blockade and different intraoperative sedation levels on the short-term recovery of elderly patients receiving total hip arthroplasty. METHODS: Patients aged 65 years and older undergoing total hip arthroplasty were randomized into three groups: a general anesthesia without lumbosacral plexus block group, and two general anesthesia plus lumbosacral plexus block groups, each with a different level of sedation (light or deep)...
April 5, 2017: Clinical Journal of Pain
https://www.readbyqxmd.com/read/28334857/co-cultures-with-stem-cell-derived-human-sensory-neurons-reveal-regulators-of-peripheral-myelination
#16
Alex J Clark, Malte S Kaller, Jorge Galino, Hugh J Willison, Simon Rinaldi, David L H Bennett
See Saporta and Shy (doi:10.1093/awx048) for a scientific commentary on this article.Effective bidirectional signalling between axons and Schwann cells is essential for both the development and maintenance of peripheral nerve function. We have established conditions by which human induced pluripotent stem cell-derived sensory neurons can be cultured with rat Schwann cells, and have produced for the first time long-term and stable myelinating co-cultures with human neurons. These cultures contain the specialized domains formed by axonal interaction with myelinating Schwann cells, such as clustered voltage-gated sodium channels at the node of Ranvier and Shaker-type potassium channel (Kv1...
April 1, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/28332276/dual-ccr2-ccr5-antagonist-treatment-attenuates-adipose-inflammation-but-not-microvascular-complications-in-ob-ob-mice
#17
Phillipe D O'Brien, Lucy M Hinder, Sebastian D Parlee, John M Hayes, Carey Backus, Hongyu Zhang, Lijun Ma, Stacey A Sakowski, Frank C Brosius, Eva L Feldman
Diabetic peripheral neuropathy (DPN) and diabetic kidney disease (DKD) are common diabetic complications with limited treatment options. Experimental studies show that targeting inflammation using chemokine receptor (CCR) antagonists ameliorates DKD, presumably by reducing macrophage accumulation or activation. As inflammation is implicated in DPN development, we assessed whether CCR2 and CCR5 antagonism could also benefit DPN. Five-week-old ob/ob mice were fed a diet containing MK-0812, a dual CCR2-CCR5 receptor antagonist, for 8 weeks and DPN, DKD, and metabolic phenotyping were then performed to determine the effect of CCR inhibition...
March 23, 2017: Diabetes, Obesity & Metabolism
https://www.readbyqxmd.com/read/28331362/anesthesia-for-the-patient-undergoing-total-knee-replacement-current-status-and-future-prospects
#18
REVIEW
Zachary A Turnbull, Dahniel Sastow, Gregory P Giambrone, Tiffany Tedore
Total knee arthroplasty (TKA) has become one of the most common orthopedic surgical procedures performed nationally. As the population and surgical techniques for TKAs have evolved over time, so have the anesthesia and analgesia used for these procedures. General anesthesia has been the dominant form of anesthesia utilized for TKA in the past, but regional anesthetic techniques are on the rise. Multiple studies have shown the potential for regional anesthesia to improve patient outcomes, such as a decrease in intraoperative blood loss, length of stay, and patient mortality...
2017: Local and Regional Anesthesia
https://www.readbyqxmd.com/read/28315922/superior-perioperative-analgesia-with-combined-femoral-obturator-sciatic-nerve-block-in-comparison-with-posterior-lumbar-plexus-and-sciatic-nerve-block-for-acl-reconstructive-surgery
#19
Metaxia Bareka, Michael Hantes, Eleni Arnaoutoglou, George Vretzakis
PURPOSE: The purpose of this randomized controlled study is to compare and evaluate the intraoperative and post-operative outcome of PLPS nerve block and that of femoral, obturator and sciatic (FOS) nerve block as a method of anaesthesia, in performing ACL reconstruction. METHODS: Patients referred for elective arthroscopic ACL reconstruction using hamstring autograft were divided in two groups. The first group received combined femoral-obturator-sciatic nerve block (FOS Group) under dual guidance, whereas the second group received posterior lumbar plexus block under neurostimulation and sciatic nerve block (PLPS Group) under dual guidance...
March 18, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28298772/effect-of-dexmedetomidine-as-an-adjuvant-to-0-75-ropivacaine-in-interscalene-brachial-plexus-block-using-nerve-stimulator-a-prospective-randomized-double-blind-study
#20
H D Rashmi, H K Komala
BACKGROUND: Ropivacaine, a newer local anesthetic (LA), has been increasingly used nowadays in different concentrations for peripheral nerve blocks. It has lesser cardiac toxicity and higher safety margin when compared to bupivacaine. Dexmedetomidine, a novel α2 agonist, is widely used as adjuvant to LA in peripheral nerve blocks to decrease the time of onset and increase the duration of the block. In this study, we evaluated the effect of dexmedetomidine as an adjuvant with 0.75% ropivacaine for interscalene brachial plexus block using nerve stimulator...
January 2017: Anesthesia, Essays and Researches
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