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https://www.readbyqxmd.com/read/28696485/repeatability-of-a-dislocation-spinal-cord-injury-model-in-a-rat-a-high-speed-biomechanical-analysis
#1
Stephen Mattucci, Jie Liu, Paul Fijal, Wolfram Tetzlaff, Thomas R Oxland
Dislocation is the most common, and severe, spinal cord injury (SCI) mechanism in humans, yet there are few preclinical models. While dislocation in the rat model has been shown to produce unique outcomes, like other closed column models it exhibits higher outcome variability. Refinement of the dislocation model will enhance the testing of neuroprotective strategies, further biomechanical understanding, and guide therapeutic decisions. The overall objective of this study is to improve biomechanical repeatability of a dislocation SCI model in the rat, through the following specific aims: i) design new injury clamps that pivot and self-align to the vertebrae; ii) measure intervertebral kinematics during injury using the existing and redesigned clamps; and iii) compare relative motion at the vertebrae-clamp interface to determine which clamps provide the most rigid connection...
July 11, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/28687146/intravenous-dexmedetomidine-for-cesarean-delivery-and-its-concentration-in-colostrum
#2
M Yoshimura, T Kunisawa, M Suno, A Sugawara, A Kurosawa, R Nakanishi, K Aoki, T Toriumi
BACKGROUND: Dexmedetomidine is a sedative agent with high α2-adrenoreceptor selectivity. We investigated intravenous Dexmedetomidine administration during scheduled cesarean delivery under neuraxial anesthesia; and concentration in the colostrum. METHODS: Twenty-seven participants having elective cesarean delivery under combined spinal-epidural anesthesia were enrolled. After delivery and cord clamping, 6μg/kg/h of intravenous dexmedetomidine was administered for 10minutes, followed by a dose of 0...
May 10, 2017: International Journal of Obstetric Anesthesia
https://www.readbyqxmd.com/read/28670801/australian-and-new-zealand-committee-on-resuscitation-neonatal-resuscitation-guidelines-2016
#3
Helen G Liley, Lindsay Mildenhall, Peter Morley
New Australian and New Zealand Neonatal Resuscitation guidelines reflect recent advances in neonatal resuscitation science, as critically appraised by the International Liaison Committee on Resuscitation. Substantial changes since the 2010 guidelines include: (i) updates to the Newborn Resuscitation Flowchart to include a greater emphasis on maintaining normal body temperature, and to emphasise the importance of beginning assisted ventilation by 1 min in infants who have absent or ineffective spontaneous breathing; (ii) updates to the physiology of the normal perinatal transition that resuscitation is trying to restore; (iii) recommendations for more frequent reinforcement of training, and for structured feedback for resuscitation training instructors; (iv) new guidance in relation to the timing of cord clamping for preterm newborn infants; (v) recommendation to monitor body temperature on admission to newborn units as a resuscitation quality indicator; (vi) suggestion to consider electrocardiographic (ECG) monitoring (as an adjunct to oximetry) to obtain more rapid and accurate estimation of heart rate during resuscitation; (vii) removal of previous suggestions to intubate meconium-exposed, non-vigorous term infants to suction the trachea; and (viii) suggestion to establish vascular access to enable administration of intravenous adrenaline (epinephrine) as soon as chest compressions are deemed to be needed...
July 2017: Journal of Paediatrics and Child Health
https://www.readbyqxmd.com/read/28663089/sinomenine-produces-peripheral-analgesic-effects-via-inhibition-of-voltage-gated-sodium-currents
#4
Jeong-Yun Lee, Seo-Yeon Yoon, Jonghwa Won, Han-Byul Kim, Youngnam Kang, Seog Bae Oh
Sinomenium acutum has been used in traditional medicine to treat a painful disease such as rheumatic arthritis and neuralgia. Sinomenine, which is a main bioactive ingredient in Sinomenium acutum, has been reported to have an analgesic effect in diverse pain animal models. However little is known about the detailed mechanisms underlying peripheral analgesic effect of sinomenine. In the present study, we aimed to elucidate its cellular mechanism by using formalin-induced acute inflammatory pain model in mice...
June 27, 2017: Neuroscience
https://www.readbyqxmd.com/read/28660196/endovascular-repair-of-traumatic-isthmic-ruptures-special-concerns
#5
REVIEW
Nikolaos Patelis, Athanasios Katsargyris, Chris Klonaris
Injury of the aortic isthmus is the second most frequent cause of death in cases of blunt traumatic injury. Conventional open repair is related to significant morbidity and mortality. Thoracic endovascular aortic repair (TEVAR) has increasing role in traumatic isthmic rupture, as it avoids the thoracotomy-related morbidity, aortic cross clamping, and cardiopulmonary bypass. Additionally to the technical difficulties of open repair, multi-trauma patients may not tolerate the manipulations necessary to undergo open surgery, due to concomitant injuries...
2017: Frontiers in Surgery
https://www.readbyqxmd.com/read/28654448/delayed-umbilical-cord-clamping-at-birth-beneficial-for-all-babies
#6
Molly M Killion
No abstract text is available yet for this article.
July 2017: MCN. the American Journal of Maternal Child Nursing
https://www.readbyqxmd.com/read/28648533/recurrent-laryngeal-nerve-injury-and-swallowing-dysfunction-in-neonatal-aortic-arch-repair
#7
Kamal K Pourmoghadam, William M DeCampli, Mark Ruzmetov, James Kosko, Sami Kishawi, Michael O'Brien, Amanda Cowden, Kurt Piggott, Harun Fakioglu
BACKGROUND: We evaluated the incidence, clinical effect, and recovery rate of vocal cord dysfunction (VCD) and swallowing dysfunction in neonates undergoing aortic arch repair. METHODS: We retrospectively evaluated 101 neonates who underwent aortic arch reconstruction from 2008 to 2015. Direct flexible laryngoscopy was performed in 89 patients before initiation of postoperative oral feeding after Norwood (n = 63) and non-Norwood (n = 26) arch reconstruction. We defined VCD as immobility of vocal cords or their lack of coaptation and poor mobility...
June 22, 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28637786/the-role-of-capsaicin-sensitive-c-fiber-afferent-pathways-in-the-control-of-micturition-in-spinal-intact-and-spinal-cord-injured-mice
#8
Katsumi Kadekawa, Tsuyoshi Majima, Takahiro Shimizu, Naoki Wada, William C de Groat, Anthony J Kanai, Momokazu Goto, Mitsuharu Yoshiyama, Kimio Sugaya, Naoki Yoshimura
We examined bladder and urethral sphincter activity in mice with or without spinal cord injury (SCI) after C-fiber afferent desensitization induced by capsaicin pretreatment and changes in electrophysiological properties of mouse bladder afferent neurons 4 weeks after SCI. Female C57BL/6N mice were divided into 4 groups; (1) spinal intact (SI)-control, (2) SI-capsaicin pretreatment (Cap), (3) SCI-control and (4) SCI-Cap groups. Continuous cystometry and external urethral sphincter (EUS)-electromyogram (EMG) were conducted under an awake condition...
June 21, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28622781/-iron-requirements-during-the-first-6-months-of-life
#9
A Lapillonne, O Becquet
Because of the postnatal redistribution of the iron store, the term infant born after an uneventful pregnancy virtually needs no iron during its first 6 months of life. On the other hand, several factors, such as duration of gestation, gender, mother's iron status, alteration of the iron placental transfer, significantly influence the iron store at birth. Because of their reduced body store at birth and their higher demand during catch-up growth, low birth weight infants should receive an iron supplement, which should be started earlier and given at a higher dose in the more premature infants...
May 2017: Archives de Pédiatrie: Organe Officiel de la Sociéte Française de Pédiatrie
https://www.readbyqxmd.com/read/28622417/the-antimigraine-butterbur-ingredient-isopetasin-desensitises-peptidergic-nociceptors-via-the-transient-receptor-potential-ankyrin-1-channel
#10
Silvia Benemei, Francesco De Logu, Simone Li Puma, Ilaria Maddalena Marone, Elisabetta Coppi, Filippo Ugolini, Wolfgang Liedtke, Pollastro Federica, Giovanni Appendino, Pierangelo Geppetti, Serena Materazzi, Romina Nassini
BACKGROUND AND PURPOSE: The mechanism of the antimigraine action of butterbur [Petasites hybridus (L.) Gaertn.] is unknown. Here, we investigated the ability of isopetasin, a major butterbur constituent, to specifically target the transient receptor ankyrin 1 (TRPA1) channel and to affect functional responses relevant to migraine. EXPERIMENTAL APPROACH: Single cell calcium imaging and patch-clamp recordings in human and rodent TRPA1-expressing cells, neurogenic motor responses in isolated rat/mouse urinary bladder, release of calcitonin gene-related peptide (CGRP) from mouse spinal cord in vitro, and facial rubbing in mice and meningeal blood flow in rat were examined...
June 16, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28606652/rocuronium-versus-suxamethonium-for-rapid-sequence-induction-of-general-anaesthesia-for-caesarean-section-influence-on-neonatal-outcomes
#11
M Kosinova, P Stourac, M Adamus, D Seidlova, T Pavlik, P Janku, I Krikava, Z Mrozek, M Prochazka, J Klucka, R Stoudek, I Bartikova, H Harazim, H Robotkova, K Hejduk, Z Hodicka, M Kirchnerova, J Francakova, L Obare Pyszkova, J Hlozkova, P Sevcik
BACKGROUND: In a previous study we compared rocuronium and suxamethonium for rapid-sequence induction of general anaesthesia for caesarean section and found no difference in maternal outcome. There was however, a significant difference in Apgar scores. As this was a secondary outcome, we extended the study to explore this finding on a larger sample. METHODS: We included 488 parturients of whom 240 were women from the original study. Women were randomly assigned to receive either rocuronium 1mg/kg (ROC n=245) or suxamethonium 1mg/kg (SUX n=243) after propofol 2mg/kg...
May 10, 2017: International Journal of Obstetric Anesthesia
https://www.readbyqxmd.com/read/28591905/management-of-the-third-stage-of-labor-how-delayed-umbilical-cord-clamping-can-affect-neonatal-outcome
#12
Mitchell J Kresch
No abstract text is available yet for this article.
June 7, 2017: American Journal of Perinatology
https://www.readbyqxmd.com/read/28589518/forty-years-of-sodium-channels-structure-function-pharmacology-and-epilepsy
#13
William A Catterall
Voltage-gated sodium channels initiate action potentials in brain neurons. In the 1970s, much was known about the function of sodium channels from measurements of ionic currents using the voltage clamp method, but there was no information about the sodium channel molecules themselves. As a postdoctoral fellow and staff scientist at the National Institutes of Health, I developed neurotoxins as molecular probes of sodium channels in cultured neuroblastoma cells. During those years, Bruce Ransom and I crossed paths as members of the laboratories of Marshall Nirenberg and Philip Nelson and shared insights about sodium channels in neuroblastoma cells from my work and electrical excitability and synaptic transmission in cultured spinal cord neurons from Bruce's pioneering electrophysiological studies...
June 7, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28579948/modulation-of-low-voltage-activated-inward-current-permeable-to-sodium-and-calcium-by-darpp-32-drives-spontaneous-firing-of-insect-octopaminergic-neurosecretory-cells
#14
Bruno Lapied, Antoine Defaix, Maria Stankiewicz, Eléonore Moreau, Valérie Raymond
Identification of the different intracellular pathways that control phosphorylation/dephosphorylation process of ionic channels represents an exciting alternative approach for studying the ionic mechanisms underlying neuronal pacemaker activity. In the central nervous system of the cockroach Periplaneta americana, octopaminergic neurons, called dorsal unpaired median (DUM; DUM neurons), generate spontaneous repetitive action potentials. Short-term cultured adult DUM neurons isolated from the terminal abdominal ganglion (TAG) of the nerve cord were used to study the regulation of a tetrodotoxin-sensitive low-voltage-activated (LVA) channel permeable to sodium and calcium (Na/Ca), under whole cell voltage- and current-clamp conditions...
2017: Frontiers in Systems Neuroscience
https://www.readbyqxmd.com/read/28578361/current-umbilical-cord-clamping-practices-and-attitudes-of-obstetricians-and-midwives-toward-delayed-cord-clamping-in-saudi-arabia
#15
Nadia O Ibrahim, Hatouf H Sukkarieh, Rami T Bustami, Elaf A Alshammari, Lama Y Alasmari, Hanan M Al-Kadri
BACKGROUND: In Saudi Arabia, as in many countries, there is usually no clear definition of the timing of umbilical cord clamping (UCC) in the policies and procedures used by hospitals. The World Health Organization (WHO) recommends delayed cord clamping (DCC) ( > 1 minute after birth) as it can significantly improve hemodynamics and long-term neurodevelopment. OBJECTIVE: To investigate current practices of healthcare professionals on the timing of UCC in Saudi Arabia...
May 2017: Annals of Saudi Medicine
https://www.readbyqxmd.com/read/28576935/inflammatory-pain-reduces-c-fibre-activity-dependent-slowing-in-a-sex-dependent-manner-amplifying-nociceptive-input-to-the-spinal-cord
#16
Allen C Dickie, Barry McCormick, Veny Lukito, Kirsten L Wilson, Carole Torsney
C fibres display activity-dependent slowing (ADS), whereby repetitive stimulation (≥1Hz) results in a progressive slowing of action potential conduction velocity, which manifests as a progressive increase in response latency. However, the impact of ADS upon spinal pain processing has not been explored nor whether ADS is altered in inflammatory pain conditions. To investigate, compound action potentials were made, from dorsal roots isolated from rats with or without complete Freund's adjuvant (CFA) hindpaw inflammation, in response to electrical stimulus trains...
June 2, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28562299/delayed-umbilical-cord-clamping-after-birth
#17
(no author information available yet)
No abstract text is available yet for this article.
May 29, 2017: Pediatrics
https://www.readbyqxmd.com/read/28561189/delayed-umbilical-cord-clamping-at-32-weeks-gestation-implementation-and-outcomes
#18
Janine S Rhoades, Tatiana Bierut, Shayna N Conner, Methodius G Tuuli, Zachary A Vesoulis, George A Macones, Alison G Cahill
No abstract text is available yet for this article.
May 25, 2017: American Journal of Perinatology
https://www.readbyqxmd.com/read/28560313/urothelial-tight-junction-barrier-dysfunction-sensitizes-bladder-afferents
#19
Nicolas Montalbetti, Anna C Rued, Stefanie N Taiclet, Lori A Birder, F Aura Kullmann, Marcelo D Carattino
Interstitial cystitis/bladder pain syndrome (IC/BPS) is a chronic voiding disorder that presents with pain in the urinary bladder and surrounding pelvic region. A growing body of evidence suggests that an increase in the permeability of the urothelium, the epithelial barrier that lines the interior of the bladder, contributes to the symptoms of IC/BPS. To examine the consequence of increased urothelial permeability on pelvic pain and afferent excitability, we overexpressed in the urothelium claudin 2 (Cldn2), a tight junction (TJ)-associated protein whose message is significantly upregulated in biopsies of IC/BPS patients...
May 2017: ENeuro
https://www.readbyqxmd.com/read/28542001/acetaminophen-metabolite-n-acylphenolamine-induces-analgesia-via-transient-receptor-potential-vanilloid-1-receptors-expressed-on-the-primary-afferent-terminals-of-c-fibers-in-the-spinal-dorsal-horn
#20
Nobuko Ohashi, Daisuke Uta, Mika Sasaki, Masayuki Ohashi, Yoshinori Kamiya, Tatsuro Kohno
BACKGROUND: The widely used analgesic acetaminophen is metabolized to N-acylphenolamine, which induces analgesia by acting directly on transient receptor potential vanilloid 1 or cannabinoid 1 receptors in the brain. Although these receptors are also abundant in the spinal cord, no previous studies have reported analgesic effects of acetaminophen or N-acylphenolamine mediated by the spinal cord dorsal horn. We hypothesized that clinical doses of acetaminophen induce analgesia via these spinal mechanisms...
August 2017: Anesthesiology
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