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Propofol analysis

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https://www.readbyqxmd.com/read/28819211/dynamic-local-connectivity-uncovers-altered-brain-synchrony-during-propofol-sedation
#1
Rose Dawn Bharath, Rajanikant Panda, Jitender Saini, Kamath Sriganesh, G S Umamaheswara Rao
Human consciousness is considered a result of the synchronous "humming" of multiple dynamic networks. We performed a dynamic functional connectivity analysis using resting state functional magnetic resonance imaging (rsfMRI) in 14 patients before and during a propofol infusion to characterize the sedation-induced alterations in consciousness. A sliding 36-second window was used to derive 59 time points of whole brain integrated local connectivity measurements. Significant changes in the connectivity strength (Z Corr) at various time points were used to measure the connectivity fluctuations during awake and sedated states...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28813523/et-26-hydrochloride-et-26-hcl-has-similar-hemodynamic-stability-to-that-of-etomidate-in-normal-and-uncontrolled-hemorrhagic-shock-uhs-rats
#2
Bin Wang, Shouming Chen, Jun Yang, Linghui Yang, Jin Liu, Wensheng Zhang
OBJECTIVE: ET-26 HCl is a promising sedative-hypnotic anesthetic with virtually no effect on adrenocortical steroid synthesis. However, whether or not ET-26 HCl also has a sufficiently wide safety margin and hemodynamic stability similar to that of etomidate and related compounds remains unknown. In this study, the effects of ET-26 HCl, etomidate and propofol on therapeutic index, heart rate (HR), mean arterial pressure (MAP), maximal rate for left ventricular pressure rise (Dmax/t), and maximal rate for left ventricular pressure decline (Dmin/t) were investigated in healthy rats and a rat model of uncontrolled hemorrhagic shock (UHS)...
2017: PloS One
https://www.readbyqxmd.com/read/28800981/near-infrared-spectroscopy-in-adult-cardiac-surgery-patients-a-systematic-review-and-meta-analysis
#3
Matthew J Chan, Tricia Chung, Neil J Glassford, Rinaldo Bellomo
OBJECTIVES: To identify the normal baseline preoperative range of cerebral tissue oxygen saturation (SctO2) derived using near-infrared spectroscopy (NIRS) and the efficacy of perioperative interventions designed to modulate SctO2 in cardiac surgical patients. DESIGN: Systematic review and meta-analysis of relevant randomized controlled trials (RCTs) extracted from the Medline, Embase, and Cochrane Central Register of Controlled Trials databases. SETTING: Hospitals performing cardiac surgery...
August 2017: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/28790148/the-actions-of-drug-combinations-on-the-gabaa-receptor-manifest-as-curvilinear-isoboles-of-additivity
#4
Daniel J Shin, Allison L Germann, Joseph H Steinbach, Gustav Akk
Drug interactions are often analyzed in terms of isobolograms. In the isobologram, the line connecting the axial points corresponding to the concentrations of two different drugs that produce an effect of the same magnitude is termed an isobole of additivity. Although the isobole of additivity can be a straight line in some special cases, previous work has found that it is curvilinear when the two drugs differ in their maximal effects or Hill slopes. Modulators of transmitter-gated ion channels have a wide range of maximal effects as well as Hill slopes, suggesting that the isoboles for drug actions on ion channel function are not linear...
August 8, 2017: Molecular Pharmacology
https://www.readbyqxmd.com/read/28769979/safety-and-effectiveness-of-endoscopist-directed-nurse-administered-sedation-during-gastric-endoscopic-submucosal-dissection
#5
Yong Suk Cho, Sang Youn Shin, Changhyeok Hwang, Jeonghun Seo, Jong Won Choi, Byung Kyu Park, Sun Young Won, Chun Kyon Lee, Yong Kang Lee, Han Ho Jeon
BACKGROUND AND AIMS: Endoscopic submucosal dissection (ESD) is routinely performed in treating gastric neoplasia and requires long-term higher levels of sedation. Endoscopist-directed nurse-administered sedation (EDNAS) has not been well studied in ESD. This study aimed to evaluate the safety and effectiveness of EDNAS for ESD. METHODS: Patients treated with ESD for gastric tumors between 2013 and 2015 were retrospectively collected. Patients were divided into a midazolam-treated group (M group) and a midazolam plus propofol-treated group (MP group)...
2017: Gastroenterology Research and Practice
https://www.readbyqxmd.com/read/28750775/breakdown-of-long-range-temporal-correlations-in-brain-oscillations-during-general-anesthesia
#6
Dominik Krzemiński, Maciej Kamiński, Artur Marchewka, Michał Bola
Consciousness has been hypothesized to emerge from complex neuronal dynamics, which prevails when brain operates in a critical state. Evidence supporting this hypothesis comes mainly from studies investigating neuronal activity on a short time-scale of seconds. However, a key aspect of criticality is presence of scale-free temporal dependencies occurring across a wide range of time-scales. Indeed, robust long-range temporal correlations (LRTCs) are found in neuronal oscillations during conscious states, but it is not known how LRTCs are affected by loss of consciousness...
July 24, 2017: NeuroImage
https://www.readbyqxmd.com/read/28741364/propofol-sedation-implementation-utility-of-the-failure-mode-and-effect-analysis-patient-focused-quality-and-safety
#7
Adrián Huergo Fernández, Pedro Amor Martín, Fernando Fernández Cadenas
Sedation is a key component of digestive endoscopy. While ensuring procedural safety and quality represents a primary goal, a detailed assessment of patient-focused risks and improvements is lacking on most occasions. Failure mode and effect analysis (FMEA) is a useful tool in this context as a means of raising barriers and defense mechanisms to prevent adverse events from developing.
July 25, 2017: Revista Española de Enfermedades Digestivas
https://www.readbyqxmd.com/read/28729940/propofol-induced-downregulation-of-nr2b-membrane-translocation-in-hippocampus-and-spatial-memory-deficits-of-neonatal-mice
#8
Yuzhu Wang, Song Han, Ruquan Han, Yue Su, Junfa Li
BACKGROUND: Thousands of infants and children are undergoing anesthesia around the world every day. But impacts of anesthetics on the developing neural system remain unclear yet. Previous evidence showed that anesthesia might affect the developing neural system. Thus, early-life anesthesia becomes a critical issue in clinical pediatric practice. Hence, propofol, a short-acting and widely applied intravenous anesthetic, has been gaining focus upon neonatal anesthesia. METHODS: Fifty-four male C57BL/6J mice were randomly divided into following three groups: group D6 intraperitoneally (i...
July 2017: Brain and Behavior
https://www.readbyqxmd.com/read/28710219/comparison-of-propofol-and-dexmedetomidine-infused-overnight-to-treat-hyperactive-and-mixed-icu-delirium-a-protocol-for-the-basel-prodex-clinical-trial
#9
Alexa Hollinger, Katrin Ledergerber, Stefanie von Felten, Raoul Sutter, Stephan Rüegg, Lukas Gantner, Sibylle Zimmermann, Andrea Blum, Luzius A Steiner, Stephan Marsch, Martin Siegemund
BACKGROUND/OBJECTIVES: Delirium is a neurobehavioural disturbance that frequently develops particularly in the intensive care unit (ICU) population. It was first described more than half a century ago, where it was already discovered as a state that might come along with serious complications such as prolonged ICU and hospital stay, reduced quality of life and increased mortality. However, in most cases, there is still lack of proof for causal relationship. Its presence frequently remains unrecognised due to suggested predominance of the hypoactive form...
July 13, 2017: BMJ Open
https://www.readbyqxmd.com/read/28708771/effect-of-clonidine-on-hemodynamic-responses-during-laparoscopic-cholecystectomy-a-systematic-review-and-meta-analysis
#10
Yi Zhang, Xi Zhang, Yu Wang, Jiefeng Zhang
BACKGROUND: Clonidine might be beneficial to the patients undergoing laparoscopic cholecystectomy. This meta-analysis focused on the influence of clonidine on hemodynamic responses in patients undergoing laparoscopic cholecystectomy. METHODS: We searched several databases including PubMed, EMbase, Web of science, EBSCO, and Cochrane library databases. This meta-analysis included randomized controlled trials regarding the influence of clonidine versus placebo on laparoscopic cholecystectomy...
July 13, 2017: Surgical Laparoscopy, Endoscopy & Percutaneous Techniques
https://www.readbyqxmd.com/read/28689423/in-response-to-the-editorial-will-societies-of-anesthesiologists-partake-in-the-take-off-of-non-anesthesiologist-administration-of-propofol
#11
Rafael Cabadas, Julián Álvarez-Escudero
The editorial of Dr. Dumonceau comments on the discrepancies with the declarations done in regard to the article sent by titled Alvarez J. et al "Safety of the patient in deep sedation for endoscopico digestive procedures". We do not agree in the analysis of the mortality, with comparative studies between anesthesiologists and not anesthesiologists and with the conclusion of the editorial.
July 10, 2017: Revista Española de Enfermedades Digestivas
https://www.readbyqxmd.com/read/28682949/an-analysis-of-substandard-propofol-detected-in-use-in-zambian-anesthesia
#12
Hazel Mumphansha, Jason W Nickerson, Amir Attaran, Sean Overton, Sharon Curtis, Paul Mayer, M Dylan Bould
BACKGROUND: In early 2015, clinicians throughout Zambia noted a range of unpredictable adverse events after the administration of propofol, including urticaria, bronchospasm, profound hypotension, and most predictably an inadequate depth of anesthesia. Suspecting that the propofol itself may have been substandard, samples were procured and sent for testing. METHODS: Three vials from 2 different batches were analyzed using gas chromatography-mass spectrometry methods at the John L...
August 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28681569/diagnostic-use-of-endoscopic-full-thickness-wall-resection-eftr-a-novel-minimally-invasive-technique-for-colonic-tissue-sampling-in-patients-with-severe-gastrointestinal-motility-disorders
#13
P V Valli, D Pohl, M Fried, R Caduff, P Bauerfeind
BACKGROUND: Complex gastrointestinal (GI) motility disorders such as chronic intestinal pseudo-obstruction (CIPO) or Hirschsprung's disease (HD) are challenging to diagnose and treat appropriately. Thorough assessment of patient history, radiographic exams, endoscopy, and motility measurements aid in diagnostic workup, yet underlying histology is the cornerstone to enable a more distinct diagnosis of neuromuscular GI disorders. Traditionally, surgical procedures have been performed to obtain specimen suitable for accurate histologic analysis...
July 6, 2017: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
https://www.readbyqxmd.com/read/28675953/utility-of-nociceptive-flexion-reflex-threshold-and-bispectral-index-to-predict-movement-responses-under-propofol-anaesthesia
#14
Axel Jakuscheit, Matthias J Posch, Stefanos Gkaitatzis, Lisa Neumark, Mark Hackbarth, Martin Schneider, Gregor Lichtner, Jan H Baars, Falk von Dincklage
INTRODUCTION: The nociceptive flexion reflex threshold (NFRT) is a promising tool to monitor analgesia during general anaesthesia. Clinical studies have shown that the NFRT allows to predict movement responses to painful stimuli under a combined anaesthetic regime of sedative and opioid agents. Experimental studies indicated that the NFRT is also able to predict such movement responses under an exclusively sedative regime like propofol mono-anaesthesia. Therefore, we performed this study to investigate the ability of the NFRT to predict movement responses to painful stimuli in patients during a clinical propofol mono-anaesthesia...
June 2017: Somatosensory & Motor Research
https://www.readbyqxmd.com/read/28674652/the-influence-of-storage-time-and-temperature-on-propofol-concentrations-in-canine-blood-and-plasma
#15
Sherry Cox, Joan Bailey, Chika Okafor, Reza Seddighi, Tom Doherty
Propofol is an intravenous anesthetic commonly used due to its favorable pharmacokinetic and pharmacodynamic profile. There are discrepancies in the literature about the most appropriate sample for determining propofol concentrations. Although plasma has been used for determining propofol concentrations, whole blood has been the preferred sample. There is also a lack of consistency in the literature on the effect of storage time and temperature on propofol concentrations and this may lead to errors in the design of pharmacokinetic/pharmacodynamics studies...
2017: PeerJ
https://www.readbyqxmd.com/read/28672899/pathway-related-modules-involved-in-the-application-of-sevoflurane-or-propofol-in-off-pump-coronary-artery-bypass-graft-surgery
#16
Xiangmei Bu, Bo Wang, Yaoqi Wang, Zhigang Wang, Chunzhi Gong, Feng Qi, Caixia Zhang
Off-pump coronary artery bypass graft (CABG) surgery has recently emerged as a means to avoid the sequelae of extracorporeal circulation, including the whole-body inflammatory response, coagulation disorders and multiple organ dysfunction. At present, gas anesthesia, sevoflurane and intravenous anesthesia and propofol have been widely used during the CABG. To further understand the underlying mechanisms of these anesthetics on the gene level, the present study conducted pathway-related module analysis based on a co-expression network...
July 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28663055/propofol-inhibits-invasion-and-proliferation-of-c6-glioma-cells-by-regulating-the-ca-2-permeable-ampa-receptor-system-xc-pathway
#17
Xin-Yue Wang, Yan-Li Li, Hai-Yun Wang, Min Zhu, Di Guo, Guo-Lin Wang, Ying-Tang Gao, Zhuo Yang, Tang Li, Chen-Yi Yang, Yi-Meng Chen
Anesthetics are documented to affect tumors; therefore, we studied the antiglioma effect of propofol on proliferation and invasiveness of glioma cells and explored the underlying mechanism. C6 glioma cells were cultured and treated with propofol, and cell viability, invasiveness, and migration were measured. Glutamate release was measured using an enzyme-catalyzed kinetic reaction. xCT protein and α-amino-3-hydroxy-5-methylisoxazole-4-propionic acid (AMPA) receptor GluR2 subunit protein expression was assessed with Western blot analysis and immunofluorescent staining...
June 27, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28658879/attenuation-of-haemodynamic-parameters-in-response-to-pneumoperitoneum-during-laparoscopic-cholecystectomy-a-randomized-controlled-trial-comparing-infusions-of-propofol-and-dexmedetomidine
#18
Meyong Pincho Bhutia, Arati Rai
INTRODUCTION: Effective control of sympathetic response to pneumoperitoneum is vital to avoid morbidity in patients undergoing laparoscopic surgeries. This control must be achieved without any side effects of the drugs being used as well as ensuring a raid recovery from anaesthesia in order to maximise operation theatre utility. AIM: To study the effectiveness of dexmedetomidine in attenuating the haemodynamic response to pneumoperitoneum during laparoscopic cholecystectomy (using only the maintenance dose) with that of propofol and compare time to extubation, haemodynamics on extubation, sedation score after extubation and any incidence of side effects between the two study drug...
May 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28657957/a-prospective-study-of-age-dependent-changes-in-propofol-induced-electroencephalogram-oscillations-in-children
#19
Johanna M Lee, Oluwaseun Akeju, Kristina Terzakis, Kara J Pavone, Hao Deng, Timothy T Houle, Paul G Firth, Erik S Shank, Emery N Brown, Patrick L Purdon
BACKGROUND: In adults, frontal electroencephalogram patterns observed during propofol-induced unconsciousness consist of slow oscillations (0.1 to 1 Hz) and coherent alpha oscillations (8 to 13 Hz). Given that the nervous system undergoes significant changes during development, anesthesia-induced electroencephalogram oscillations in children may differ from those observed in adults. Therefore, we investigated age-related changes in frontal electroencephalogram power spectra and coherence during propofol-induced unconsciousness...
August 2017: Anesthesiology
https://www.readbyqxmd.com/read/28647806/pre-anesthetic-stroke-volume-variation-can-predict-cardiac-output-decrease-and-hypotension-during-induction-of-general-anesthesia
#20
Takashi Juri, Koichi Suehiro, Sayaka Tsujimoto, Shigemune Kuwata, Akira Mukai, Katsuaki Tanaka, Tokuhiro Yamada, Takashi Mori, Kiyonobu Nishikawa
This study aimed to assess the reliability of stroke volume variation (SVV) in predicting cardiac output (CO) decrease and hypotension during induction of general anesthesia. Forty-five patients undergoing abdominal surgery under general anesthesia were enrolled. Before induction of anesthesia, patients were required to maintain deep breathing (6-8 times/min), and pre-anesthetic SVV was measured for 1 min by electrical cardiometry. General anesthesia was induced with propofol, remifentanil, rocuronium, and sevoflurane...
June 24, 2017: Journal of Clinical Monitoring and Computing
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