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Neonates and Anaesthetics

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https://www.readbyqxmd.com/read/28974111/in-vitro-neurotoxicity-by-ropivacaine-is-reduced-by-silencing-cav3-3-t-type-calcium-subunits-in-neonatal-rat-sensory-neurons
#1
Xianjie Wen, Hua Liang, Heng Li, Weiming Ou, Han-Bing Wang, Hongzhen Liu, Shijie Li
Neurotoxicity of local anaesthetics has been alerted by more and more peoples. Cav3.1 and Cav3.2 T-type calcium channels were closely related with local anaesthetics toxicity. However, the role of Cav3.3, another subtype of the T-type calcium channel, on the neurotoxicity induced by local anaesthetics remains unclear. CaMKIIγ is a kind of multifunctional kinase and associated with a variety of physiological and pathological process. T-type calcium channel is closely related with CaMKIIγ. Up-regulation CaMKIIγ can increase T-type currents at the dorsal root ganglia (DRG)...
October 3, 2017: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/28969320/isoflurane-exposure-for-three-hours-triggers-apoptotic-cell-death-in-neonatal-macaque-brain
#2
K K Noguchi, S A Johnson, G A Dissen, L D Martin, F M Manzella, K J Schenning, J W Olney, A M Brambrink
Background: Retrospective clinical studies suggest there is a risk for neurodevelopmental impairment following early childhood exposure to anaesthesia. In the developing animal brain, including those of non-human primates (NHPs), anaesthetics induce apoptotic cell death. We previously reported that a 5 h isoflurane (ISO) exposure in infant NHPs increases apoptosis 13-fold compared with control animals. However, the majority of paediatric surgeries requiring anaesthesia are of shorter durations...
September 1, 2017: British Journal of Anaesthesia
https://www.readbyqxmd.com/read/28969317/dexmedetomidine-mediated-neuroprotection-against-sevoflurane-induced-neurotoxicity-extends-to-several-brain-regions-in-neonatal-rats
#3
J F Perez-Zoghbi, W Zhu, M R Grafe, A M Brambrink
Background: Exposure of infant animals to clinically used anaesthetics is associated with acute structural brain abnormalities and development functional alterations. The α 2 -adrenoceptor agonist dexmedetomidine (DEX) induces sedation, analgesia, and provides neuroprotection in experimental brain injury models. However, it is unknown whether DEX also affords protection in the developing brain against anaesthesia using sevoflurane (SEVO), which is commonly used in paediatric anaesthesia...
September 1, 2017: British Journal of Anaesthesia
https://www.readbyqxmd.com/read/28969315/alternative-technique-or-mitigating-strategy-for-sevoflurane-induced-neurodegeneration-a-randomized-controlled-dose-escalation-study-of-dexmedetomidine-in-neonatal-rats
#4
J-R Lee, E P Lin, R D Hofacer, B Upton, S Y Lee, L Ewing, B Joseph, A W Loepke
Background: Brain injury in newborn animals from prolonged anaesthetic exposure has raised concerns for millions of children undergoing anaesthesia every yr. Alternative anaesthetic techniques or mitigating strategies are urgently needed to ameliorate potentially harmful effects. We tested dexmedetomidine, both as a single agent alternative technique and as a mitigating adjuvant for sevoflurane anaesthesia. Methods: Neonatal rats were randomized to three injections of dexmedetomidine (5, 25, 50, or 100 µg kg -1 every 2 h), or 6 h of 2...
September 1, 2017: British Journal of Anaesthesia
https://www.readbyqxmd.com/read/28969308/inhibition-of-p75-neurotrophin-receptor-does-not-rescue-cognitive-impairment-in-adulthood-after-isoflurane-exposure-in-neonatal-mice
#5
J M Schilling, A Kassan, C Mandyam, M L Pearn, A Voong, G G Grogman, V B Risbrough, I R Niesman, H H Patel, P M Patel, B P Head
Background: Isoflurane is widely used for anaesthesia in humans. Isoflurane exposure of rodents prior to post-natal day 7 (PND7) leads to widespread neurodegeneration in laboratory animals. Previous data from our laboratory suggest an attenuation of apoptosis with the p75 neurotrophin receptor (p75NTR) inhibitor TAT-Pep5. We hypothesized that isoflurane toxicity leads to behavioural and cognitive abnormalities and can be rescued with pre-anaesthesia administration of TAT-Pep5. Methods: Neonatal mouse pups were pretreated with either TAT-Pep5 (25 μl, 10 μM i...
September 1, 2017: British Journal of Anaesthesia
https://www.readbyqxmd.com/read/28962511/granulocyte-colony-stimulating-factor-significantly-decreases-density-of-hippocampal-caspase-3-positive-nuclei-thus-ameliorating-apoptosis-mediated-damage-in-a-model-of-ischaemic-neonatal-brain-injury
#6
Peter Pastuszko, Gregory J Schears, Joanna Kubin, David F Wilson, Anna Pastuszko
OBJECTIVES: Ischaemic brain injury is a major complication in patients undergoing surgery for congenital heart disease, with the hippocampus being a particularly vulnerable region. We hypothesized that neuronal injury resulting from cardiopulmonary bypass and associated circulatory arrest is ameliorated by pretreatment with granulocyte colony-stimulating factor (G-CSF), a cytokine and an anti-apoptotic neurotrophic factor. METHODS: In a model of ischaemic brain injury, 4 male newborn piglets were anaesthetized and subjected to deep hypothermic circulatory arrest (DHCA) (cooled to 18°C, DHCA maintained for 60 min, rewarmed and recovered for 8-9 h), while 4 animals received G-CSF (34 µg/kg, intravenously) 2 h prior to the DHCA procedure...
October 1, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/28950826/long-term-effects-of-early-exposure-to-stress-pain-opioids-and-anaesthetics-on-pain-sensitivity-and-neurocognition
#7
Gerbrich E van den Bosch, Monique van Dijk, Dick Tibboel, Jurgen C de Graaff
Background Experimental studies have shown that neonatal exposure to stress, pain, opioids and anaesthetics may cause histologic and morphologic changes in the central nervous system with associated functional and behavioural changes in the long term. An important question is whether this holds true for humans also - and in particular for sick neonates who often are exposed to pain and receive anaesthetics and sedatives. Methods In this narrative review, we evaluate the effects of neonatal exposure to stress, pain, opioids and anaesthetics in infancy and childhood in animals and in preterm born and term born humans on pain sensitivity, brain morphology, cognition and behaviour later in life...
September 26, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28881034/microrna-27a-3p-suppression-of-ppar-%C3%AE-contributes-to-cognitive-impairments-resulting-from-sevoflurane-treatment
#8
Xiang Lv, Jia Yan, Jue Jiang, Xuhui Zhou, Yi Lu, Hong Jiang
Sevoflurane is the most widely used anaesthetic administered by inhalation. Exposure to sevoflurane in neonatal mice can induce learning deficits and abnormal social behaviours. MicroRNA (miR)-27a-3p, a short, noncoding RNA that functions as a tumour suppressor, is upregulated after inhalation of anaesthetic, and peroxisome proliferator-activated receptor γ (PPARγ) is one of its target genes. The objective of this study was to investigate how the miR-27a-3p-PPARγ interaction affects sevoflurane-induced neurotoxicity...
September 7, 2017: Journal of Neurochemistry
https://www.readbyqxmd.com/read/28814087/effects-of-sevoflurane-on-apoptosis-bdnf-and-cognitive-functions-in-neonatal-rats
#9
A B Ozer, S Ceribasi, A O Ceribasi, I Demirel, M K Bayar, B Ustundag, A Ileri, O L Erhan
OBJECTIVE: To evaluate the early and late effects of sevoflurane on the neonatal brain. BACKGROUND: Sevoflurane is the most used anaesthetics in neonatal subjects. METHODS: The study included 7-day-old male Wistar-Albino rats (n = 30), which were divided into the two groups according to the anaesthetic received: sevoflurane (S) and control group (C). Half of each group was sacrificed six hours after anaesthesia (early, E) while the remaining subjects were sacrificed six weeks later (late, L)...
2017: Bratislavské Lekárske Listy
https://www.readbyqxmd.com/read/28794527/the-effect-of-addition-of-dexamethasone-to-levobupivacaine-in-parturients-receiving-combined-spinal-epidural-for-analgesia-for-vaginal-delivery
#10
Amr Samir Wahdan, Ahmed Ibrahim El-Sakka, Hassan Mostafa Ismail Gaafar
BACKGROUND AND AIMS: Regional analgesia is commonly used for the relief of labour pain, Prolongation of analgesia can be achieved by adjuvant medications. The aim of this randomised controlled trial was to evaluate the efficacy of intrathecal levobupivacaine with dexamethasone for labour analgesia. METHODS: A total of 80 females were included in this study, all were primigravidas undergoing vaginal delivery with cervical dilatation ≥4 cm and 50% or more effacement...
July 2017: Indian Journal of Anaesthesia
https://www.readbyqxmd.com/read/28743959/continual-conscious-bioluminescent-imaging-in-freely-moving-somatotransgenic-mice
#11
Rajvinder Karda, Dany P Perocheau, Natalie Suff, Joanne Ng, Juliette M K M Delhove, Suzanne M K Buckley, Samantha Richards, John R Counsell, Henrik Hagberg, Mark R Johnson, Tristan R McKay, Simon N Waddington
Luciferase bioimaging in living animals is increasingly being applied in many fields of biomedical research. Rodent imaging usually involves anaesthetising the animal during data capture, however, the biological consequences of anaesthesia have been largely overlooked. We have evaluated luciferase bioimaging in conscious, unrestrained mice after neonatal intracranial or intravascular administration of lentiviral, luciferase reporter cassettes (biosensors); we present real-time analyses from the first day of life to adulthood...
July 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28711179/immediate-birth-an-analysis-of-women-and-their-babies-undergoing-time-critical-birth-in-a-tertiary-referral-obstetric-hospital
#12
M H Warren, J Kamania, A T Dennis
BACKGROUND: At our institution, the emergency obstetric 'code green' activates the system for immediate birth, usually by caesarean section. This study aimed to determine the incidence of immediate birth, indications, modes of anaesthesia, and short-term neonatal and maternal outcomes. METHOD: A review was performed for all women at the Royal Women's Hospital, Parkville, Australia who underwent immediate birth over a two-year period: January 1, 2013 to December 31, 2014...
June 16, 2017: International Journal of Obstetric Anesthesia
https://www.readbyqxmd.com/read/28676256/neurotoxicity-of-propofol-on-rat-hypoglossal-motoneurons-in-vitro
#13
Laura Monni, Filippo Ghezzi, Silvia Corsini, Andrea Nistri
Although propofol is a widely used intravenous general anaesthetic, many studies report its toxic potential, particularly on the developing central nervous system. We investigated its action on hypoglossal motoneurons (HMs) that control two critical functions in neonates, namely tongue muscle activity and airway patency. Thus, clinically relevant concentrations of propofol (1 and 5μM) were applied (4h) to neonatal rat brainstem slices to evaluate the expression of apoptosis-inducing factor (AIF) as biomarker of toxicity...
August 10, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28675564/activation-of-serotonergic-neurons-in-the-medullary-caudal-raphe-shortens-the-laryngeal-chemoreflex-in-anaesthetized-neonatal-rats
#14
William T Donnelly, Luxi Xia, Donald Bartlett, J C Leiter
What is the central question of this study? Does activation of serotonergic neurons in the caudal medullary raphe, some of which project to the nucleus of the solitary tract, shorten the laryngeal chemoreflex? What is the main finding and its importance? We found that serotonin originating from neurons in the caudal raphe acts through a 5-HT3 receptor located in the nucleus of the solitary tract to terminate reflex apnoea. Failure or deficiency of this arousal-related process is likely to be relevant to the pathogenesis of sudden infant death syndrome...
July 3, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/28648454/disinfection-of-gloved-hands-for-multiple-activities-with-indicated-glove-use-on-the-same-patient
#15
REVIEW
G Kampf, S Lemmen
Most hand hygiene guidelines recommend that gloves should be changed during patient care when an indication for hand disinfection occurs. Observational studies indicate that the majority of healthcare workers (HCWs) do not disinfect their hands at all during continued glove wear. The aim of this narrative review is to assess the potential benefits and risks for disinfecting gloved hands during patient care for multiple activities with indicated glove use on the same patient. Continued glove wear for multiple activities on the same patient often results in performing procedures, including aseptic procedures with contaminated gloves, especially in a setting where there are many indications in a short time, e...
June 23, 2017: Journal of Hospital Infection
https://www.readbyqxmd.com/read/28625557/-more-than-3-hours-and-less-than-3-years-safety-of-anaesthetic-procedures-in-infants-less-than-3-years-old-subected-to-surgery-for-more-the-3-hours
#16
Julián Álvarez Escudero, Rosa María Paredes Esteban, Francisco José Cambra Lasaosa, Máximo Vento, Maite López Gil, Juan Carlos de Agustín Asencio, María Teresa Moral Pumarega
An FDA alert in December 2016 on the safety of general anesthesia and sedations in patients less than 3 years of age and pregnant women has raised doubts in relation to the attitude that professionals implicated in these procedures should adopt in relation to these specific group of patients. Confronted with this situation, the following medical scientific societies: Sociedad Española de Anestesia y Reanimación (SEDAR), Sociedad Española de Cirugía Pediátrica (SECP), Sociedad Española de Cuidados Intensivos Pediátricos (SECIP) y Sociedad Española de Neonatología (SENeo), have established a working group to analyze and clarify the safety of these techniques...
June 15, 2017: Anales de Pediatría: Publicación Oficial de la Asociación Española de Pediatría (A.E.P.)
https://www.readbyqxmd.com/read/28551594/awake-caudal-anaesthesia-in-neonates-young-infants-for-improved-patient-safety
#17
Wan Yen Lim, Sujani Anuruddhika Wijeratne, Evangeline Hua Ling Lim
Caudal epidural block in a conscious infant is a recognised technique that allows the avoidance of general anaesthesia and risks associated with it. It is also technically easier to perform reliably compared with an awake subarachnoid block in skilled hands.(1) While local anaesthetic systemic toxicity is a rare complication of caudal anaesthesia, this case illustrates the potential for caudal anaesthesia done awake in enhancing patient safety through early recognition of local anaesthetic systemic toxicity...
May 27, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28480608/metabolomic-analysis-for-the-study-of-maturation-in-pediatrics-effect-of-confounding-factors-in-a-pilot-study
#18
María Encarnación Blanco, Oskar González, Oihane Elena Albóniga, María Luz Alonso, Rosa María Alonso
A pilot study for the investigation of the maturation grade of children has been carried out using plasma samples already analyzed in a previous pharmacokinetic study. By using a meticulous data treatment, possible confounding factors that may hinder the obtained results were identified. By doing so, it was possible to obtain enough evidence to support the feasibility of performing a larger study eluding some unwanted variability and minimizing not only the number of subjects involved but also the time and money spent on the study...
September 2017: Electrophoresis
https://www.readbyqxmd.com/read/28294340/neuroprotective-effects-of-artemisinin-against-isoflurane-induced-cognitive-impairments-and-neuronal-cell-death-involve-jnk-erk1-2-signalling-and-improved-hippocampal-histone-acetylation-in-neonatal-rats
#19
Guang Xu, Yun-Li Huang, Ping-le Li, Hai-Ming Guo, Xue-Ping Han
OBJECTIVE: This study was performed to assess the effect of artemisinin against isoflurane-induced neuronal apoptosis and cognitive impairment in neonatal rats. METHODS: Artemisinin (50, 100 or 200 mg/kg b.wt/day; oral gavage) was administered to separate groups of neonatal rats starting from postnatal day 3 (P3) to postnatal day 21 (P21). On postnatal day 7 (P7), animals were exposed to inhalation anaesthetic isoflurane (0.75%) for 6 h. KEY FINDINGS: Neuronal apoptosis following anaesthetic exposure was significantly reduced by artemisinin...
June 2017: Journal of Pharmacy and Pharmacology
https://www.readbyqxmd.com/read/28283552/anaesthetic-considerations-for-surgery-in-newborns
#20
REVIEW
Constance S Houck, Amy E Vinson
Almost 30 years ago, the American Academy of Pediatrics Committee on Fetus and Newborn coauthored a policy statement strongly advocating for the use of anaesthesia in all neonates stating 'local or systemic pharmacologic agents now available permit relatively safe administration of anesthesia or analgesia to neonates undergoing surgical procedures and that such administration is indicated according to the usual guidelines for the administration of anesthesia to high-risk, potentially unstable patients'. With current techniques and advanced monitoring, preterm and full-term infants routinely undergo surgical procedures under general anaesthesia to repair congenital defects that were lethal in years past...
July 2017: Archives of Disease in Childhood. Fetal and Neonatal Edition
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