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https://www.readbyqxmd.com/read/29047247/a-simulation-study-of-propofol-effect-site-concentration-for-appropriate-sedation-in-pediatric-patients-undergoing-brain-mri-pharmacodynamic-analysis
#1
Se Hee Na, Young Song, So Yeon Kim, Hyo Jin Byon, Hwan Ho Jung, Dong Woo Han
PURPOSE: We aimed to establish the propofol effect-site concentration (Ce) for appropriate sedation by pharmacodynamic analysis and to determine the propofol Ce during occurrence of sedation-related side effects in pediatric patients undergoing brain magnetic resonance imaging (MRI). MATERIALS AND METHODS: In 50 pediatric patients scheduled for brain MRI, sedation was induced with 2.0 mg/kg propofol; additional propofol doses were 0.5-1 mg/kg. Propofol Ce was simulated by inputting the propofol administration profiles of patients into a pediatric compartmental model (Choi model)...
November 2017: Yonsei Medical Journal
https://www.readbyqxmd.com/read/29047136/apnoeic-oxygenation-with-high-flow-nasal-oxygen-for-laryngeal-surgery-a-case-series
#2
C Lyons, M Callaghan
Surgery under apnoeic conditions with the use of high-flow nasal oxygen is novel. Between November 2016 and May 2017, 28 patients underwent tubeless laryngeal or tracheal surgery under apnoeic conditions with high-flow nasal oxygen as the sole method of gas exchange. Patients received total intravenous anaesthesia and neuromuscular blocking agents for the duration of their surgery. The median (IQR [range]) apnoea time was 19 (15-24 [9-37]) min. Four patients experienced an episode of oxygen desaturation to a value between 85% and 90%, lasting less than 2 min in each case...
November 2017: Anaesthesia
https://www.readbyqxmd.com/read/29046317/vasoactivity-of-nitrite-in-the-iliac-artery-of-the-toad-rhinella-marina
#3
Leonard George Forgan, Melenaite Sofele, Bryony Alice McNeill, Melissa S Cameron, John A Donald
Nitrite (NO2(-)) causes vasodilation in mammals due to the formation of (nitric oxide) NO by endogenous NO2(-) reduction in the vascular wall. In this study, we determined if a similar mechanism operates in amphibians. Dual-wire myography of the iliac artery from Rhinella marina showed that applied NO2(-) caused a concentration-dependent vasodilation in normoxia (21% O2; EC50 438 µM). Hypoxia (0.63% O2) significantly increased the maximal dilation to NO2(-) by 5 % (P = 0.0398). The addition of oxyhemoglobin significantly increased the EC50 (P = 0...
October 18, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/29045961/-effects-of-recent-upper-respiratory-tract-infections-on-incidence-of-the-perioperative-respiratory-adverse-events-in-children-a-prospective-cohort-study
#4
C Q Li, D X Wang, T Cheng, X Y Zheng
OBJECTIVE: To investigate the effects of the recent upper respiratory tract infections (URI) on the incidence of perioperative respiratory adverse events in children scheduled to undergo general anesthesia and elective surgery. METHODS: In the study, 232 children undergoing general anesthesia with laryngeal mask airway (LMA) for elective ophthalmic surgeries at Peking University First Hospital, Beijing, China, from Nov. 1, 2015 to May 10, 2016 were enrolled. On the day of the surgery, the parents of the children were preoperatively asked to fill out a questionnaire regarding the baseline characteristics and medical history of the children, including gender, age, height, weight, history of URI within the last 2 weeks before anesthesia, history of premature, long-term passive smoking exposure, habitual sleep snoring, and history of asthma...
October 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/29045578/effectiveness-of-enhanced-pulse-oximetry-sonifications-for-conveying-oxygen-saturation-ranges-a-laboratory-comparison-of-five-auditory-displays
#5
E Paterson, P M Sanderson, N A B Paterson, R G Loeb
Background: Anaesthetists monitor auditory information about a patient's vital signs in an environment that can be noisy and while performing other cognitively demanding tasks. It can be difficult to identify oxygen saturation (SpO2) values using existing pulse oximeter auditory displays (sonifications). Methods: In a laboratory setting, we compared the ability of non-clinician participants to detect transitions into and out of an SpO2 target range using five different sonifications while they performed a secondary distractor arithmetic task in the presence of background noise...
October 13, 2017: British Journal of Anaesthesia
https://www.readbyqxmd.com/read/29045003/barbed-expansion-sphincter-pharyngoplasty-for-the-treatment-of-oropharyngeal-collapse-in-osas-a-retrospective-study-on-17-patients
#6
L Pianta, G Bertazzoni, R Morello, P Perotti, P Nicolai
Expansion Sphincter Pharyngoplasty (ESP) was introduced in 2007 and represents a promising surgical technique to treat patients with oropharyngeal walls collapse with reduced morbidity and high success rates. Between December 2012 and January 2015 17 patients underwent ESP at the department of Otorhinolaryngology of the University of Brescia (Italy), using barbed knotless sutures to improve the biomechanical effect of sutures on tissue collapse (BESP). Patients with moderate to severe OSAS and BMI < 30 kg/m(2) , who did not tolerate or refused ventilation therapy, were selected for BESP based on the presence of oropharyngeal collapse, as determined by upper airway examination and drug-induced sleep endoscopy...
October 16, 2017: Clinical Otolaryngology
https://www.readbyqxmd.com/read/29034783/cerebral-and-limb-tissue-oxygenation-during-peripheral-venoarterial-extracorporeal-life-support
#7
Nousjka P A Vranken, Anouk A M A Lindelauf, Antoine P Simons, Marcel J H Ariës, Jos G Maessen, Patrick W Weerwind
Femoral access in extracorporeal life support (ECLS) has been associated with regional variations in arterial oxygen saturation, potentially predisposing the patient to ischemic tissue damage. Current monitoring techniques, however, are limited to intermittent bedside evaluation of capillary refill among other factors. The aim of this study was to assess whether cerebral and limb regional tissue oxygen saturation (rSO2) values reflect changes in various patient-related parameters during venoarterial ECLS (VA-ECLS)...
January 1, 2017: Journal of Intensive Care Medicine
https://www.readbyqxmd.com/read/29029253/breathing-disturbances-without-hypoxia-are-associated-with-objective-sleepiness-in-sleep-apnea
#8
Henriette Koch, Logan Douglas Schneider, Laurel A Finn, Eileen B Leary, Paul E Peppard, Erika Hagen, Helge Bjarup Dissing Sorensen, Poul Jennum, Emmanuel Mignot
Study Objectives: Determine if defining two subtypes of sleep-disordered breathing (SDB) events - with or without hypoxia - results in measures that are more strongly associated with hypertension and sleepiness. Methods: A total of 1,022 subjects with 2,112 nocturnal polysomnograms (PSGs) from the Wisconsin Sleep Cohort were analyzed with our automated algorithm, developed to detect breathing disturbances and desaturations. Breathing events were time-locked to desaturations, resulting in 2 indices - desaturating (H-BDI) and non-desaturating (NH-BDI) events - regardless of arousals...
September 26, 2017: Sleep
https://www.readbyqxmd.com/read/29028081/serum-ykl-40-level-is-correlated-with-apnea-hypopnea-index-in-patients-with-obstructive-sleep-apnea-sindrome
#9
L C Mutlu, F Tülübaş, R Alp, G Kaplan, Z D Yildiz, A Gürel
OBJECTIVE: Obstructive sleep apnea syndrome (OSAS) has been associated with elevated biochemical markers of inflammation. Although the exact mechanism is unknown, both sleep deprivation and hypoxemia are believed to be important causative factors. YKL-40, also known as chitinase-like protein, has been shown to be related to various inflammatory conditions including atherosclerosis, diabetes, cancer, and asthma. The present study aimed to evaluate the relationship between YKL-40 levels and the Apnea Hypopnea Index (AHI) in patients with obstructive sleep apnea syndrome...
September 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/29028002/cyanophage-encoded-lipid-desaturases-oceanic-distribution-diversity-and-function
#10
Sheila Roitman, Ellen Hornung, José Flores-Uribe, Itai Sharon, Ivo Feussner, Oded Béjà
Cyanobacteria are among the most abundant photosynthetic organisms in the oceans; viruses infecting cyanobacteria (cyanophages) can alter cyanobacterial populations, and therefore affect the local food web and global biochemical cycles. These phages carry auxiliary metabolic genes (AMGs), which rewire various metabolic pathways in the infected host cell, resulting in increased phage fitness. Coping with stress resulting from photodamage appears to be a central necessity of cyanophages, yet the overall mechanism is poorly understood...
October 13, 2017: ISME Journal
https://www.readbyqxmd.com/read/29026001/understanding-a-role-for-hypoxia-in-lesion-formation-and-location-in-the-deep-and-periventricular-white-matter-in-small-vessel-disease-and-multiple-sclerosis
#11
REVIEW
Santiago Martinez Sosa, Kenneth J Smith
The deep and periventricular white matter is preferentially affected in several neurological disorders, including cerebral small vessel disease (SVD) and multiple sclerosis (MS), suggesting that common pathogenic mechanisms may be involved in this injury. Here we consider the potential pathogenic role of tissue hypoxia in lesion development, arising partly from the vascular anatomy of the affected white matter. Specifically, these regions are supplied by a sparse vasculature fed by long, narrow end arteries/arterioles that are vulnerable to oxygen desaturation if perfusion is reduced (as in SVD, MS and diabetes) or if the surrounding tissue is hypoxic (as in MS, at least)...
October 15, 2017: Clinical Science (1979-)
https://www.readbyqxmd.com/read/29022650/sleep-related-breathing-disorders-in-patients-with-prader-willi-syndrome-depending-on-the-period-of-growth-hormone-treatment
#12
Agnieszka Lecka-Ambroziak, Małgorzata Jędrzejczak, Marta Wysocka-Mincewicz, Mieczysław Szalecki
INTRODUCTION: Sleep-related breathing disorders (SRBD) are commonly present in patients with Prader-Willi syndrome (PWS). Recombinant human growth hormone (rhGH) treatment is reported to improve breathing function in PWS, but the findings are not explicit. MATERIAL AND METHODS: Screening polysomnography- polygraphy (PSG), assessing nasal respiratory flow, respiratory effort, and blood oxygen saturation, was used. Group 1 - before rhGH therapy (n = 11, mean age 3...
October 12, 2017: Endokrynologia Polska
https://www.readbyqxmd.com/read/29019815/an-international-multicenter-observational-study-of-cerebral-oxygenation-during-infant-and-neonatal-anesthesia
#13
Vanessa A Olbrecht, Justin Skowno, Vanessa Marchesini, Lili Ding, Yifei Jiang, Christopher G Ward, Gaofeng Yu, Huacheng Liu, Bernadette Schurink, Laszlo Vutskits, Jurgen C de Graaff, Francis X McGowan, Britta S von Ungern-Sternberg, Charles Dean Kurth, Andrew Davidson
BACKGROUND: General anesthesia during infancy is associated with neurocognitive abnormalities. Potential mechanisms include anesthetic neurotoxicity, surgical disease, and cerebral hypoxia-ischemia. This study aimed to determine the incidence of low cerebral oxygenation and associated factors during general anesthesia in infants. METHODS: This multicenter study enrolled 453 infants aged less than 6 months having general anesthesia for 30 min or more. Regional cerebral oxygenation was measured by near-infrared spectroscopy...
October 11, 2017: Anesthesiology
https://www.readbyqxmd.com/read/29019657/trans-10-cis-12-conjugated-linoleic-acid-affects-expression-of-lipogenic-genes-in-mammary-glands-of-lactating-dairy-goats
#14
Huaiping Shi, Tianying Zhang, Cong Li, Jianjue Wang, Jiangtao Huang, Zhongyang Li
The molecular mechanisms on milk fat depression (MFD) in response to trans-10,cis-12-conjugated linoleic acid (t10,c12-CLA) supplementation in ruminants were elucidated in this research with dairy goats. A total of 30 2-year-old Xinong Saanen dairy goats [40 ± 5 days in milk (DIM)] at peak lactation stage were assigned to a 3 × 3 Latin square design (14 day treatment period, followed with 14 day washout). Three CLA treatments included (a) control, fed the basal diet only without CLA supplementation; (b) orally supplemented with 8 g/day of lipid-encapsulated CLA (low dose, CLA-1); and (c) orally supplemented with 16 g/day of lipid-encapsulated CLA (high dose, CLA-2)...
October 19, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28992686/general-auxiliary-enabled-photoinduced-pd-catalyzed-remote-desaturation-of-aliphatic-alcohols
#15
Marvin Parasram, Padon Chuentragool, Yang Wang, Yi Shi, Vladimir Gevorgyan
A general, efficient, and site-selective visible light-induced Pd-catalyzed remote desaturation of aliphatic alcohols into valuable allylic-, homoallylic-, and bis-homoallylic alcohols has been developed. This transformation operates via a hybrid Pd-radical mechanism, which synergistically combines the favorable features of radical approaches, such as facile remote C-H HAT step, with that of transition metal-catalyzed chemistry (selective β-hydride elimination step). This allows achieving superior degrees of regioselectivity and yields in desaturation of alcohols com-pared to those obtained by the state-of-the-art desaturation methods...
October 9, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28991498/spontaneous-pneumomediastinum-complicating-severe-acute-asthma-exacerbation-in-adult-patients
#16
Andrea Vianello, Marco Caminati, Fulvia Chieco-Bianchi, Maria Rita Marchi, Stefania Vio, Giovanna Arcaro, Silvia Iovino, Fausto Braccioni, Beatrice Molena, Cristian Turato, Piera Peditto, Laura Battistella, Federico Gallan, Gianenrico Senna
OBJECTIVES: The real incidence of pneumomediastinum (PNM) in adult patients with severe acute asthma exacerbation continues to be unknown. The current study aims to investigate the occurrence of PNM in an adult population of patients presenting a severe asthma attack and to evaluate the risk factors associated to its development. METHODS: The 45 consecutive subjects who were admitted to our Division between January 1, 2015 and December 31, 2016 for severe acute asthma exacerbation underwent a diagnostic protocol including a standard chest X-ray and continuous monitoring of arterial oxygen saturation (SaO2) during the first 24 hours following admission...
October 9, 2017: Journal of Asthma: Official Journal of the Association for the Care of Asthma
https://www.readbyqxmd.com/read/28989720/one-enzyme-many-reactions-structural-basis-for-the-various-reactions-catalyzed-by-naphthalene-1-2-dioxygenase
#17
Daniel J Ferraro, Adam Okerlund, Eric Brown, S Ramaswamy
Rieske nonheme iron oxygenases (ROs) are a well studied class of enzymes. Naphthalene 1,2-dioxygenase (NDO) is used as a model to study ROs. Previous work has shown how side-on binding of oxygen to the mononuclear iron provides this enzyme with the ability to catalyze stereospecific and regiospecific cis-dihydroxylation reactions. It has been well documented that ROs catalyze a variety of other reactions, including mono-oxygenation, desaturation, O- and N-dealkylation, sulfoxidation etc. NDO itself catalyzes a variety of these reactions...
September 1, 2017: IUCrJ
https://www.readbyqxmd.com/read/28988489/fatty-infiltration-of-the-minor-salivary-glands-is-a-selective-feature-of-aging-but-not-sj%C3%A3-gren-s-syndrome
#18
Kerry M Leehan, Nathan P Pezant, Astrid Rasmussen, Kiely Grundahl, Jacen S Moore, Lida Radfar, David M Lewis, Donald U Stone, Christopher J Lessard, Nelson L Rhodus, Barbara M Segal, C Erick Kaufman, R Hal Scofield, Kathy L Sivils, Courtney Montgomery, A Darise Farris
OBJECTIVE: Determine the presence and assess the extent of fatty infiltration of the minor salivary glands (SG) of primary SS patients (pSS) as compared to those with non-SS sicca (nSS). METHODS: Minor SG biopsy samples from 134 subjects with pSS (n = 72) or nSS (n = 62) were imaged. Total area and fatty replacement area for each glandular cross-section (n = 4-6 cross-sections per subject) were measured using Image J (National Institutes of Health, Bethesda, MD)...
October 8, 2017: Autoimmunity
https://www.readbyqxmd.com/read/28982943/effects-of-exercise-training-on-calf-muscle-oxygen-extraction-and-blood-flow-in-patients-with-peripheral-artery-disease
#19
Wesley B Baker, Zhe Li, Steven S Schenkel, Malavika Chandra, David R Busch, Erin Kristine Englund, Kathryn H Schmitz, Arjun G Yodh, Thomas F Floyd, Emile R Mohler
We employed near-infrared optical techniques, diffuse correlation spectroscopy (DCS) and frequency-domain near-infrared spectroscopy (FD-NIRS), to test the hypothesis that supervised exercise training increases skeletal muscle microvascular blood flow and oxygen extraction in patients with peripheral artery disease (PAD) who experience claudication. PAD patients (n=64) were randomly assigned to exercise and control groups. Patients in the exercise group received three months of supervised exercise training...
October 5, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28982107/risk-factor-for-vital-signs-fluctuation-during-colonoscopy-under-conscious-sedation-consisting-of-midazolam-and-meperidine
#20
Shigeo Banno, Motohiko Kato, Yukie Sunata, Yuichiro Hirai, Yoko Kubosawa, Keiichiro Abe, Yoshiaki Takada, Tetsu Hirata, Yusaku Takatori, Michiko Wada, Satoshi Kinoshita, Hideki Mori, Kaoru Takabayashi, Masahiro Kikuchi, Toshio Uraoka
BACKGROUND: Sedatives or analgesics are widely used to relieve a patient's discomfort during colonoscopy (CS). Although cardiopulmonary adverse events are sometimes experienced during the examination, the risk factors for vital signs fluctuation (VSF) have not been fully elucidated. This study thus aimed to identify the risk factors for VSF during the examination, as well as to evaluate the frequency and the degree of VSF. SUMMARY: A total of 755 consecutive subjects who received CS under endoscopist-administrated sedation using midazolam, meperidine, or combination of both were retrospectively analyzed...
October 6, 2017: Digestive Diseases
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