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Neuromuscular blockers

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https://www.readbyqxmd.com/read/28743332/-clinical-significance-of-early-immunological-paralysis-in-patients-with-severe-h1n1-influenza-a
#1
Yongbing Qian, Hui Xie, Rui Tian, Jian Lu, Wei Jin, Ruilan Wang
OBJECTIVE: To analysis the immunological characteristics of patients with severe H1N1 influenza A, and to provide theoretical basis for predicting the prognosis of the disease. METHODS: A retrospective analysis was conducted. The clinical data of 15 patients diagnosed with severe H1N1 influenza A and admitted to Shanghai General Hospital of Nanjing Medical University from October 2015 to December 2016 were collected. All the patients were divided into survival and death groups according to 28-day survival...
July 2017: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
https://www.readbyqxmd.com/read/28701350/effectiveness-of-interventions-to-improve-medication-use-during-rapid-sequence-intubation-in-a-pediatric-emergency-department
#2
Michelle C Caruso, Jenna R Dyas, Matthew R Mittiga, Andrea S Rinderknecht, Benjamin T Kerrey
PURPOSE: Results of a study to determine whether checklist-based interventions improved the selection and administration of rapid-sequence intubation (RSI) medications in a pediatric emergency department (ED) are reported. METHODS: A retrospective study of data collected during a quality-improvement project was conducted. Data sources included the electronic health record and video review. The central intervention was use of a 21-item RSI checklist, which included guidance for the physician team leader on medication selection and timing...
July 12, 2017: American Journal of Health-system Pharmacy: AJHP
https://www.readbyqxmd.com/read/28668906/a-current-approach-to-heart-failure-in-duchenne-muscular-dystrophy
#3
REVIEW
Domenico D'Amario, Antonio Amodeo, Rachele Adorisio, Francesco Danilo Tiziano, Antonio Maria Leone, Gianluigi Perri, Piergiorgio Bruno, Massimo Massetti, Alessandra Ferlini, Marika Pane, Giampaolo Niccoli, Italo Porto, Gianluca A D'Angelo, Josip Anđelo Borovac, Eugenio Mercuri, Filippo Crea
Duchenne muscular dystrophy (DMD) is a genetic, progressive neuromuscular condition that is marked by the long-term muscle deterioration with significant implications of pulmonary and cardiac dysfunction. As such, end-stage heart failure (HF) in DMD is increasingly becoming the main cause of death in this population. The early detection of cardiomyopathy is often challenging, due to a long subclinical phase of ventricular dysfunction and difficulties in assessment of cardiovascular symptomatology in these patients who usually loose ambulation during the early adolescence...
July 1, 2017: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/28660165/the-incidence-of-hypotension-with-continuous-infusion-atracurium-compared-to-cisatracurium-in-the-intensive-care-unit
#4
Luke A VanderWeide, Mahmoud Abdel-Rasoul, Anthony Thomas Gerlach
BACKGROUND: A drug shortage of cisatracurium led to use of atracurium as an alternative neuromuscular blocker (NMB). Cisatracurium may be preferred due to less histamine release and potentially less hypotension. The study purpose is to compare the incidence of hypotension with continuous infusion atracurium to continuous infusion cisatracurium in ICU patients. MATERIALS AND METHODS: This retrospective cohort analysis reviewed 119 ICU patients who received either continuous infusion atracurium (56) or cisatracurium (63)...
April 2017: International Journal of Critical Illness and Injury Science
https://www.readbyqxmd.com/read/28658142/use-of-neuromuscular-blockers-and-neostigmine-for-general-anesthesia-and-its-association-with-neuraxial-blockade-a-retrospective-study
#5
Filipe Nadir Caparica Santos, Angélica de Fátima de Assunção Braga, Fernando Eduardo Feres Junqueira, Rafaela Menezes Bezerra, Felipe Ferreira de Almeida, Franklin Sarmento da Silva Braga, Vanessa Henriques Carvalho
This research aimed to assess the use of neuromuscular blockers (NMB) and its reversal, associated or not with neuraxial blockade, after general anesthesia.This retrospective study analyzed 1295 patients that underwent surgery with general anesthesia at Prof. Dr. José Aristodemo Pinotti Hospital in 2013. The study included patients aged >1 year, with complete, readable medical charts and anesthetic records.Rocuronium (ROC) was the most used NMB (96.7%), with an initial dose of 0.60 (0.52-0.74) mg/kg and total dose of 0...
June 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28658119/is-neuromuscular-blocker-needed-in-children-undergoing-inguinal-herniorrhaphy-a-prospective-randomized-and-controlled-trial
#6
RANDOMIZED CONTROLLED TRIAL
Bon-Wook Koo, Kyu-Whan Jung, Ah-Young Oh, Eun-Young Kim, Hyo-Seok Na, Eun-Su Choi, Kwang-Suk Seo
BACKGROUND: Intraoperative neuromuscular blocker is widely used, but is known to be associated with postoperative residual paralysis, which is known to be associated with increased risk of pulmonary complications. Hence, its use should be individualized and restricted to procedures where it is mandatory. We examined whether not using a neuromuscular blocker affects the surgical conditions in children undergoing inguinal herniorrhaphy. METHODS: Anesthesia was induced and maintained with sevoflurane in 60% nitrous oxide, and the airway was maintained using an I-gel...
June 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28608304/lambert-eaton-myasthenic-syndrome-lems-a-rare-autoimmune-presynaptic-disorder-often-associated-with-cancer
#7
REVIEW
Benedikt Schoser, Bruno Eymard, Joe Datt, Renato Mantegazza
Lambert-Eaton myasthenic syndrome (LEMS) is a rare autoimmune neuromuscular junction disorder that is related to the loss of functional P/Q-type voltage-gated calcium channels (VGCCs) on presynaptic nerve terminals. Up to 60% of cases occur as a paraneoplastic disorder (SCLC-LEMS), most commonly in association with small cell lung cancer. The remaining cases have an idiopathic non-tumor etiology but are associated with underlying autoimmune disease (NT-LEMS). Patients with LEMS invariably experience progressive proximal muscle weakness, often accompanied by general fatigue and autonomic symptoms...
June 12, 2017: Journal of Neurology
https://www.readbyqxmd.com/read/28607408/differences-in-pharmacodynamic-responses-to-rocuronium-in-normal-or-injured-orbicularis-oris-are-associated-with-expression-of-acetylcholine-receptor-subunits
#8
Yong Huang, Yian Xing, Hong Wang, Lianhua Chen, Shitong Li
Previous research has indicated that differences in sensitivities to muscle relaxants exist between facial nerve- and somatic nerve-innervated muscles. Here, we report that the 50% inhibitory concentration (IC50) values for rocuronium were significantly larger in the normal orbicularis oris than those in the gastrocnemius. Increased IC50 values and reduced twitch tension were observed after facial nerve injury. The normal orbicularis oris had a smaller muscle fiber cross-sectional area (CSA) and a larger ratio of endplate surface area (ESA) to muscle fiber CSA (ESA/CSA), but no difference was found in the density of nicotinic acetylcholine receptor (nAChR) subunits on endplates between normal orbicularis oris and gastrocnemius...
June 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28587334/effect-of-acute-peritonitis-on-rocuronium-induced-intraperitoneal-pressure-reduction-and-the-uptake-function-of-the-sarcoplasmic-reticulum
#9
Jian-You Zhang, Yuan Gong, Mei-Rong Yang, Jin Wu, Shi-Tong Li
Previous studies have reported the incomplete relaxation effect of neuromuscular blockers on skeletal muscles in acute peritonitis (AP) and other inflammatory processes; however, the underlying mechanisms responsible for this effect have not yet been satisfactorily identified. The impaired removal of cytosolic Ca(2+) through sarcoendoplasmic Ca(2+)-ATPase (SERCA) and defects in sarcoplasmic reticulum (SR) Ca(2+) uptake are the major contributing factors to diastolic dysfunction. Previous studies on the effects of neuromuscular blockers have primarily focused on neuromuscular transmission...
June 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28526162/pharmacologic-considerations-of-anesthetic-agents-in-pediatric-patients-a-comprehensive-review
#10
REVIEW
Alan D Kaye, Charles J Fox, Ira W Padnos, Ken P Ehrhardt, James H Diaz, Elyse M Cornett, Debbie Chandler, Sudipta Sen, Shilpadevi Patil
Acute pain in the pediatric population has important differences in terms of biology, intrapopulation variation, and epidemiology. Discussion as to the pharmacologic considerations of anesthetic agents, such as induction agents, neuromuscular blockers, opioids, local anesthetics, and adjuvant agents, is presented in this article. Special considerations and concerns, such as risk for propofol infusion syndrome and adverse potential side effects of anesthesia agents, are discussed. Anesthesiologists managing pediatric patients need to have a firm understanding of physiologic and pharmacologic differences compared with the adult population...
June 2017: Anesthesiology Clinics
https://www.readbyqxmd.com/read/28526149/pharmacogenomics-in-anesthesia
#11
REVIEW
Ramsey Saba, Alan D Kaye, Richard D Urman
A significant number of commonly administered medications in anesthesia show wide clinical interpatient variability. Some of these include neuromuscular blockers, opioids, local anesthetics, and inhalation anesthetics. Individual genetic makeup may account for and predict cardiovascular outcomes after cardiac surgery. These interactions can manifest at any point in the perioperative period and may also only affect a specific system. A better understanding of pharmacogenomics will allow for more individually tailored anesthetics and may ultimately lead to better outcomes, decreased hospital stays, and improved patient satisfaction...
June 2017: Anesthesiology Clinics
https://www.readbyqxmd.com/read/28460120/post-neonatal-tetanus-in-a-picu-of-a-developing-economy-intensive-care-needs-outcome-and-predictors-of-mortality
#12
Suresh Kumar Angurana, Muralidharan Jayashree, Arun Bansal, Sunit Singhi, Karthi Nallasamy
Objectives: To evaluate pediatric intensive care unit (PICU) needs, outcome and predictors of mortality in post-neonatal tetanus. Materials and methods: Review of 30 consecutive post-neonatal tetanus cases aged 1 months to 12 years admitted to a PICU in north India over a period of 10 years (January 2006 to December 2015). Results: Chronic suppurative otitis media was the commonest portal of entry. All received tetanus toxoid, human tetanus immunoglobulin (HTIG) and appropriate antibiotics; 7 (23...
April 27, 2017: Journal of Tropical Pediatrics
https://www.readbyqxmd.com/read/28433752/serotonergic-transmission-and-gap-junctional-coupling-in-proventricular-muscle-cells-in-the-american-cockroach-periplaneta-americana
#13
Ryoichi Yoshimura, Taeko Suetsugu, Yasuhisa Endo
The visceral muscle tissues of insects consist of striated muscle cells. The mechanisms responsible for delivering signals to the contractile muscles in the insect digestive tract remain unclear. We found that serotonergic nerves innervate the hemocoel surfaces of foregut and midgut muscles in the American cockroach. Electron microscopy of the neuromuscular junctions in the proventriculus (gizzard) revealed typical synaptic structures, the accumulation of large core/cored vesicles (neuropeptides) and small clear vesicle (neurotransmitter) at presynapses, and synaptic clefts...
April 19, 2017: Journal of Insect Physiology
https://www.readbyqxmd.com/read/28433474/beneficial-effect-of-tocilizumab-in-myasthenia-gravis-refractory-to-rituximab
#14
Dagur Ingi Jonsson, Ritva Pirskanen, Fredrik Piehl
Muscle fatigue associated with myasthenia gravis is caused by autoantibodies interfering with neuromuscular transmission. Immunomodulating treatment is widely used in moderate to severe myasthenia, although the use of newer biological drugs except rituximab is rare. We describe the effect of tocilizumab, a blocker of interleukin-6 signalling, in two female myasthenia patients with high titres of serum acetylcholine receptor antibodies and insufficient response to rituximab. The first patient had been treated with high dose immunoglobulins regularly for several years and the second patient had been treated both with different oral immune suppressants and immunoglobulins before testing a low dose of rituximab without significant clinical effect...
June 2017: Neuromuscular Disorders: NMD
https://www.readbyqxmd.com/read/28428630/hinge-deleted-igg4-blocker-therapy-for-acetylcholine-receptor-myasthenia-gravis-in-rhesus-monkeys
#15
Mario Losen, Aran F Labrijn, Vivianne H van Kranen-Mastenbroek, Maarten L Janmaat, Krista G Haanstra, Frank J Beurskens, Tom Vink, Margreet Jonker, Bert A 't Hart, Marina Mané-Damas, Peter C Molenaar, Pilar Martinez-Martinez, Eline van der Esch, Janine Schuurman, Marc H de Baets, Paul W H I Parren
Autoantibodies against ion channels are the cause of numerous neurologic autoimmune disorders. Frequently, such pathogenic autoantibodies have a restricted epitope-specificity. In such cases, competing antibody formats devoid of pathogenic effector functions (blocker antibodies) have the potential to treat disease by displacing autoantibodies from their target. Here, we have used a model of the neuromuscular autoimmune disease myasthenia gravis in rhesus monkeys (Macaca mulatta) to test the therapeutic potential of a new blocker antibody: MG was induced by passive transfer of pathogenic acetylcholine receptor-specific monoclonal antibody IgG1-637...
April 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28409297/the-slco1a2-189_-188insa-polymorphism-reduces-clearance-of-rocuronium-in-patients-submitted-to-elective-surgeries
#16
A C C Costa, E B Coelho, V L Lanchote, B V Correia, J T Abumansur, G R Lauretti, N V de Moraes
PURPOSE: Rocuronium (ROC) is a neuromuscular blocker mainly eliminated by biliary excretion dependent on organic anion transporting polypeptide 1A2 (OATP1A2) hepatocellular uptake. However, the influence of SLCO1A2 (gene encoding OATP1A2) genetic polymorphism on ROC pharmacokinetics was never described before. The objective of this work was to evaluate the influence of genetic polymorphisms of SLCO1A2 on the pharmacokinetics of rocuronium (ROC). METHODS: Patients undergoing elective surgeries under general anesthesia using rocuronium as a neuromuscular blocker were genotyped for SLCO1A2 polymorphisms in the coding region (41A>G, 382A>T, 404A>T, 502C>T, 516A>C, 559G>A, 830C>A, and 833delA) and in the promoter region (-1105G>A, -1032G>A, -715T>C, -361G>A, and -189_-188insA)...
August 2017: European Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28408330/muscarinic-cholinoreceptors-m1-m2-m3-and-m4-type-modulate-the-acetylcholine-secretion-in-the-frog-neuromuscular-junction
#17
Andrei N Tsentsevitsky, Irina V Kovyazina, Leniz F Nurullin, Eugeny E Nikolsky
Muscarinic cholinoreceptors regulate the neurosecretion process in vertebrate neuromuscular junctions. The diversity of muscarinic effects on acetylcholine (ACh) secretion may be attributed to the different muscarinic subtypes involved in this process. In the present study, the location of five muscarinic receptor subtypes (M1, M2, M3, M4 and M5) on the motor nerve terminals of frog cutaneous pectoris muscle was shown using specific polyclonal antibodies. The modulatory roles of these receptors were investigated via assessment of the effects of muscarine and specific muscarinic antagonists on the quantal content of endplate currents (EPCs) and the time course of secretion, which was estimated from the distribution of "real" synaptic delays of EPCs recorded in a low Ca(2+)/high Mg(2+) solution...
April 10, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28394450/effects-of-presynaptic-muscarinic-cholinoreceptor-blockade-on-neuromuscular-transmission-as-assessed-by-the-train-of-four-and-the-tetanic-fade-response-to-rocuronium
#18
Yong Beom Kim, Sangseok Lee, Kyeong Chun Lee, Ha Jung Kim, Young Jin Ro, Hong-Seuk Yang
This study investigated the effect of muscarinic M1 and M2 receptor antagonists on the rocuronium-induced train of four (TOF) fade and tetanic fade, respectively. Ex-vivo phrenic nerves and diaphragms were obtained from adult Sprague-Dawley rats and stabilized in Krebs buffer; the nerve-stimulated muscle TOF fade was observed at 20 s intervals. For the TOF study, phrenic nerves and diaphragms were incubated with pirenzepine (an M1 blocker) at concentrations of 0 nmol L(-1) (control), 10 nmol L(-1) (PZP10), or 100 nmol L(-1) (PZP100)...
July 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/28367286/effect-of-dexamethasone-on-the-onset-time-and-recovery-profiles-of-cisatracurium
#19
Keum Young So, Sang Hun Kim, Ki Tae Jung, Dong Woo Kim
BACKGROUND: The effect of dexamethasone injection on cisatracurium-induced neuromuscular block was compared according to different injection time points. METHODS: One hundred seventeen patients were randomly assigned to three groups: 8 mg of dexamethasone injected intravenously 2-3 h before anesthesia (group A), just before anesthesia induction (group B), and at the end of surgery (control group). Three minutes after anesthesia induction, intubation was performed without neuromuscular blockers, and acceleromyography was initiated...
April 2017: Korean Journal of Anesthesiology
https://www.readbyqxmd.com/read/28357836/safety-of-hyperbaric-oxygen-therapy-in-mechanically-ventilated-patients
#20
Jacques Bessereau, Jérôme Aboab, Thomas Hullin, Anne Huon-Bessereau, Jean-Luc Bourgeois, Pierre-Marie Brun, Sylvie Chevret, Djillali Annane
BACKGROUND: To evaluate the epidemiology of patients who require mechanical ventilation during hyperbaric oxygen therapy. MATERIALS AND METHODS: One-hundred-fifty patients who required mechanical ventilation during hyperbaric oxygen therapy were prospectively studied during a 6-year period in a French university hyperbaric centre. We analysed the indication of hyperbaric oxygen therapy, agent used for sedation, presence of a chest tube, need for vasopressor agents and tolerance and appearance of side effects...
2017: International Maritime Health
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