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https://www.readbyqxmd.com/read/28107273/influence-of-depth-of-hypnosis-on-pupillary-reactivity-to-a-standardized-tetanic-stimulus-in-patients-under-propofol-remifentanil-target-controlled-infusion-a-crossover-randomized-pilot-study
#1
Nada Sabourdin, Jean-Baptiste Peretout, Eliane Khalil, Marie-Laurence Guye, Nicolas Louvet, Isabelle Constant
BACKGROUND: Pupillometry allows the measurement of pupillary diameter variations in response to nociceptive stimuli. This technique has been used to monitor the balance between analgesia and nociception. Under general anesthesia, the amplitude of pupillary dilation is related to the amount of administered opioids. The objective of this study was to determine whether at a constant infusion rate of opioids, the pupillary response was influenced by depth of hypnosis assessed by the bispectral index (BIS)...
January 19, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28106793/hybrid-intelligent-system-to-perform-fault-detection-on-bis-sensor-during-surgeries
#2
José-Luis Casteleiro-Roca, José Luis Calvo-Rolle, Juan Albino Méndez Pérez, Nieves Roqueñí Gutiérrez, Francisco Javier de Cos Juez
This paper presents a new fault detection system in hypnotic sensors used for general anesthesia during surgery. Drug infusion during surgery is based on information received from patient monitoring devices; accordingly, faults in sensor devices can put patient safety at risk. Our research offers a solution to cope with these undesirable scenarios. We focus on the anesthesia process using intravenous propofol as the hypnotic drug and employing a Bispectral Index (BIS(TM)) monitor to estimate the patient's unconsciousness level...
January 18, 2017: Sensors
https://www.readbyqxmd.com/read/28105832/sensitive-and-fast-humidity-sensor-based-on-a-redox-conducting-supramolecular-ionic-material-for-respiration-monitoring
#3
Hailong Yan, Li Zhang, Ping Yu, Lanqun Mao
Real-time monitoring of respiratory rate (RR) is highly important for human health, clinical diagnosis, and fundamental scientific research. Exhaled humidity-based RR monitoring has recently attracted increased attention because of its accuracy and portability. Here, we report a new design of an exhaled humidity sensor for the real-time monitoring of the RR based on a synthetic redox conducting supramolecular ionic material (SIM). The humidity-dependent conducting SIM is prepared by ionic self-assembly in aqueous solutions of electroactive 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) and 1,10-bis(3-methylimidazolium-1-yl) decane (C10(mim)2)...
January 3, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28088804/monitoring-noninvasive-ventilation-in-patients-with-obesity-hypoventilation-syndrome-comparison-between-ventilator-built-in-software-and-respiratory-polygraphy
#4
Ramon Fernandez Alvarez, Claudio Rabec, Gemma Rubinos Cuadrado, Juan Alejandro Cascon Hernandez, Patricia Rodriguez, Marjolaine Georges, Pere Casan
BACKGROUND: Polygraphy (PG) remains the standard method of assessing noninvasive ventilation (NIV) effectiveness. Built-in software (BIS) of recent NIV equipment provides estimates of some ventilator parameters, but their usefulness is unclear. OBJECTIVES: To assess the reliability of BIS compared with PG in a cohort of obesity hypoventilation syndrome (OHS) patients on NIV. METHODS: Thirty stable OHS patients on NIV were evaluated in an outpatient setting with simultaneous PG and BIS recordings...
January 14, 2017: Respiration; International Review of Thoracic Diseases
https://www.readbyqxmd.com/read/28079825/the-utility-of-bispectral-index-monitoring-for-prevention-of-rocuronium-induced-withdrawal-movement-in-children-a-randomized-controlled-trial
#5
Byung Gun Lim, Il Ok Lee, Young Sung Kim, Young Ju Won, Heezoo Kim, Myoung Hoon Kong
BACKGROUND: This study was designed to determine whether a deep hypnotic state with a bispectral index (BIS) value less than 40 could alleviate withdrawal movement (WM) upon rocuronium injection during anesthesia induction in children. METHODS: Finally, 135 healthy children (3-12 years) scheduled for minor elective surgery were studied. Without premedication, anesthesia was induced with thiopental sodium 5 mg/kg. Patients were randomized into 2 groups (control vs experimental) and then by virtue of rocuronium injection time, patients in the experimental group were allocated into 2 groups, as follows: in the control group (group C; n = 45), rocuronium 0...
January 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28078617/changes-in-the-first-postoperative-night-bispectral-index-of-patients-after-thyroidectomy-with-different-types-of-primary-anesthetic-management-a-randomized-controlled-trial
#6
Wen-Fei Tan, Zhi-Lin Wang, Hong Ma, Feng Jin, Huang-Wei Lu
Despite major advances in anesthesia management and developments in anesthetic agents, postoperative sleep disturbances remain dissatisfactory for many patients. We hypothesized that propofol might have a subtle influence on sleep after thyroidectomy compared to sevoflurane. A randomized, single-blinded, controlled trial was conducted at the First Hospital of China Medical University from October 2014 to October 2015. One hundred and twenty-four patients undergoing thyroidectomy were enrolled and received sevoflurane (sevoflurane group) or propofol (propofol group) as anesthesia maintenance...
January 12, 2017: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/28078549/functionalized-ionic-liquid-assisted-chromatography-free-synthesis-of-bis-indolyl-methanes
#7
Sunita Choudhary, Khima Pandey, Saroj Budania, Anil Kumar
A chromatography-free synthesis of bis(indolyl)methanes has been developed using sulfonic acid and sulfonyl hydrazine-functionalized ionic liquids as catalyst and scavenger, respectively. The employed excess aldehyde for completion of the reaction was scavenged by sulfonyl hydrazine-functionalized ionic liquid. Purification of products without column chromatography, ease of monitoring and shorter reaction time are the salient features of the developed protocol. The reuse and regeneration of the catalyst and scavenger have been achieved up to 5 and 2 times, respectively, without significant loss of activity...
January 11, 2017: Molecular Diversity
https://www.readbyqxmd.com/read/28076483/sedation-in-colonoscopy-by-using-three-different-propofol-infusion-methods-and-analysis-of-plasma-concentration-levels-a-prospective-comparative-study
#8
Paulo Henrique Boaventura de Carvalho, José Pinhata Otoch, Mohamad Ali Khan, Paulo Sakai, Hugo Gonçalo Guedes, Everson Luiz de Almeida Artifon
Background: The propofolemia becomes directly linked to the clinical effects of this anesthetic and is the focus for studies comparing propofol clinical use, in different administration methods routinely used in endoscopy units where sedation is widely administered to patients. Aim: To evaluate the effects of three different regimens of intravenous propofol infusion in colonoscopies. Methods: A total of 50 patients that underwent colonoscopies were consecutively assigned to three groups: 1) intermittent bolus infusion; 2) continuous manually controlled infusion; 3) continuous automatic infusion...
November 2016: Arquivos Brasileiros de Cirurgia Digestiva: ABCD, Brazilian Archives of Digestive Surgery
https://www.readbyqxmd.com/read/28063965/a-calix-4-arene-derivative-and-its-selective-interaction-with-drugs-clofibric-acid-diclofenac-and-aspirin
#9
Angela F Danil de Namor, Maan Al Nuaim, Jose A Villanueva Salas, Sophie Bryant, Brendan Howlin
The synthesis and characterisation of a partially substituted calix[4]arene, namely, 5,11,17,23-tetra-tert-butyl,25,27-bis[aminoethoxy] 26,28-dihydroxycalix[4]arene are reported. Its interaction with commonly used pharmaceuticals (clofibric acid, diclofenac and aspirin) was investigated by spectroscopic ((1)H NMR and UV), electrochemical (conductance measurements) and thermal (titration calorimetry) techniques. It is concluded on the basis of the experimental work and molecular simulation studies that the receptor interacts selectively with these drugs...
January 4, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28063863/correlation-between-observational-scales-of-sedation-and-comfort-and-bispectral-index-scores-bis
#10
Michael Barbato, Greg Barclay, Jan Potter, Wilf Yeo, Joseph Chung
CONTEXT: When palliative care patients enter the phase of unconsciousness preceding death it is standard practice to initiate or continue a subcutaneous infusion of an opioid plus or minus a sedative. The doses are determined somewhat empirically and adjustments are based on clinical assessment and observational measures of sedation and comfort. Following reports that these observational measures could be misleading, this study assesses their validity by comparing them with an objective measure of sedation, the Bispectral Index score (BIS)...
January 4, 2017: Journal of Pain and Symptom Management
https://www.readbyqxmd.com/read/28044337/the-role-and-limitations-of-eeg-based-depth-of-anaesthesia-monitoring-in-theatres-and-intensive-care
#11
REVIEW
Z Hajat, N Ahmad, J Andrzejowski
In this article we will look at some of the principles in processed EEG monitoring as applied to bispectral index (BIS). We outline why BIS should be regarded as a 'memory' monitor which in most circumstances reflects the depth of sedation or anaesthesia in particular patients. Its limitation in paralysed and non-paralysed patients must be understood in order for this monitor to be used safely. Finally, its emerging use in critical care will be explored.
January 2017: Anaesthesia
https://www.readbyqxmd.com/read/28027085/bispectral-index-can-reliably-detect-deep-sedation-in-mechanically-ventilated-patients-a-prospective-multicenter-validation-study
#12
Zhu-Heng Wang, Han Chen, Yan-Lin Yang, Zhong-Hua Shi, Qing-Hua Guo, Yu-Wei Li, Li-Ping Sun, Wei Qiao, Guan-Hua Zhou, Rong-Guo Yu, Kai Yin, Xuan He, Ming Xu, Laurent J Brochard, Jian-Xin Zhou
BACKGROUND: Excessively deep sedation is prevalent in mechanically ventilated patients and often considered suboptimal. We hypothesized that the bispectral index (BIS), a quantified electroencephalogram instrument, would accurately detect deep levels of sedation. METHODS: We prospectively enrolled 90 critically ill mechanically ventilated patients who were receiving sedation. The BIS was monitored for 24 hours and compared with the Richmond Agitation Sedation Scale (RASS) evaluated every 4 hours...
December 22, 2016: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28024636/spectroscopic-and-tddft-investigation-on-highly-selective-fluorogenic-chemosensor-and-construction-of-molecular-logic-gates
#13
Sabeel M Basheer, Saravana Loganathan Ashok Kumar, Moorthy Saravana Kumar, Anandaram Sreekanth
1,5-Bis(2-fluorene)thiocarbohydrazone (FBTC) was designed and synthesized for selective sensing of fluoride and copper ions. The binding constants of FBTC towards fluoride and copper ions have been calculated using the Benesi-Hildebrand equation, and FBTC has more binding affinity towards copper ion than fluoride ion. The (1)H NMR and (13)C NMR titration studies strongly support the deprotonation was taken from the N-H protons followed by the formation of hydrogen bond via N-H(…)F. To understand the fluoride ion sensing mechanism, theoretical investigation had been carried out using the density functional theory and time-dependent density functional theory...
March 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28017174/benefit-of-general-anesthesia-monitored-by-bispectral-index-compared-with-monitoring-guided-only-by-clinical-parameters-systematic-review-and-meta-analysis
#14
Carlos Rogério Degrandi Oliveira, Wanderley Marques Bernardo, Victor Moisés Nunes
BACKGROUND: The bispectral index parameter is used to guide the titration of general anesthesia; however, many studies have shown conflicting results regarding the benefits of bispectral index monitoring. The objective of this systematic review with meta-analysis is to evaluate the clinical impact of monitoring with the bispectral index parameter. METHODS: The search for evidence in scientific information sources was conducted during December 2013 to January 2015, the following primary databases: Medline/PubMed, LILACS, Cochrane, CINAHL, Ovid, SCOPUS and TESES...
January 2017: Brazilian Journal of Anesthesiology
https://www.readbyqxmd.com/read/28004530/intracellular-microreactors-as-artificial-organelles-to-conduct-multiple-enzymatic-reactions-simultaneously
#15
María Godoy-Gallardo, Cédric Labay, Michelle M T Jansman, Pramod K Ek, Leticia Hosta-Rigau
The creation of artificial organelles is a new paradigm in medical therapy that aims to substitute for missing cellular function by replenishing a specific cellular task. Artificial organelles tackle the challenge of mimicking metabolism, which is the set of chemical reactions that occur within a cell, mainly catalyzed by enzymes. So far, the few reported carriers able to conduct enzymatic reactions intracellularly are based on single-compartment carriers. However, cell organelles outperform by conducting multiple reactions simultaneously within confined sub-compartments...
December 22, 2016: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28001221/number-of-leprosy-reactions-during-treatment-clinical-correlations-and-laboratory-diagnosis
#16
Douglas Eulálio Antunes, Gabriela Porto Ferreira, Mariana Vitorino Candeiro Nicchio, Sergio Araujo, Ana Carolina Rodrigues da Cunha, Rafaela Resende Gomes, Adeilson Viera da Costa, Isabela Maria Bernardes Goulart
INTRODUCTION: The occurrence of leprosy reactions, a common event during treatment, may be mostly related to the action of multidrug therapy on Mycobacterium leprae. The clinical and laboratory monitoring of patients with reactions is important, since collecting data that assists in predicting the risk of reactions may help to prevent disability. METHODS: This was a sectional study, in order to correlate clinical and laboratory diagnosis with the number of reactions during treatment...
November 2016: Revista da Sociedade Brasileira de Medicina Tropical
https://www.readbyqxmd.com/read/28000121/detection-of-bacillus-and-stenotrophomonas-species-growing-in-an-organic-acid-and-endocrine-disrupting-chemical-rich-environment-of-distillery-spent-wash-and-its-phytotoxicity
#17
Ram Chandra, Vineet Kumar
Sugarcane molasses-based distillery spent wash (DSW) is well known for its toxicity and complex mixture of various recalcitrant organic pollutants with acidic pH, but the chemical nature of these pollutants is unknown. This study revealed the presence of toxic organic acids (butanedioic acid bis(TMS)ester; 2-hydroxysocaproic acid; benzenepropanoic acid, α-[(TMS)oxy], TMS ester; vanillylpropionic acid, bis(TMS)), and other recalcitrant organic pollutants (2-furancarboxylic acid, 5-[[(TMS)oxy] methyl], TMS ester; benzoic acid 3-methoxy-4-[(TMS)oxy], TMS ester; and tricarballylic acid 3TMS), which are listed as endocrine-disrupting chemicals...
January 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/27996245/ultra-sensitive-colorimetric-assay-system-based-on-the-hybridization-chain-reaction-triggered-enzyme-cascade-amplification
#18
Shasha Lu, Tao Hu, Shuang Wang, Jian Sun, Xiurong Yang
A versatile and ultrasensitive colorimetric detection platform has been developed based on the hybridization chain reaction (HCR)-triggered enzyme cascade amplification in this work. The proposal involves the preparation of two different hairpin DNA strands consisting of the H1, modified with glucose oxidase (GOx-H1) and H2, modified with horseradish peroxidase (HRP-H2). The H1 and H2 were composed of complementary sequence of nucleic acid target (T) and interlaced complementary stem-loop sequences. In the nucleic acid detection, the hybridization of T and its complementary sequence induces the autonomous assembly of GOx-H1 and HRP-H2 through the predictable HCR, accompanied by the formation of GOx/HRP enzyme pairs with a multiple enzymatic cascade...
December 20, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/27995430/eeg-artifacts-reduction-by-multivariate-empirical-mode-decomposition-and-multiscale-entropy-for-monitoring-depth-of-anaesthesia-during-surgery
#19
Quan Liu, Yi-Feng Chen, Shou-Zen Fan, Maysam F Abbod, Jiann-Shing Shieh
Electroencephalography (EEG) has been widely utilized to measure the depth of anaesthesia (DOA) during operation. However, the EEG signals are usually contaminated by artifacts which have a consequence on the measured DOA accuracy. In this study, an effective and useful filtering algorithm based on multivariate empirical mode decomposition and multiscale entropy (MSE) is proposed to measure DOA. Mean entropy of MSE is used as an index to find artifacts-free intrinsic mode functions. The effect of different levels of artifacts on the performances of the proposed filtering is analysed using simulated data...
December 19, 2016: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/27989158/step-by-step-assembly-of-polynuclear-lanthanide-complexes-with-a-phosphonated-bipyridine-ligand
#20
Nabila Souri, Pingping Tian, Alexandre Lecointre, Zoé Lemaire, Salah Chafaa, Jean-Marc Strub, Sarah Cianférani, Mourad Elhabiri, Carlos Platas-Iglesias, Loïc J Charbonnière
The synthesis of the octadentate ligand L (LH8 = ((([2,2'-bipyridine]-6,6'-diylbis(methylene))bis(azanetriyl))tetrakis(methylene))tetrakis(phosphonic acid)) is reported. The coordination of L with various lanthanide cations was monitored by absorption and luminescence spectrophotometric titration experiments (Ln = Tb, Yb), potentiometry (Ln = La, Eu, Lu), and mass spectrometry (Ln = Tb). It was found that L forms very stable mononuclear (LnL) species in aqueous solutions (log K = 19.80(5), 19.5(2), and 19.56(5) for La, Eu, and Lu, respectively) with no particular trend along the series...
December 19, 2016: Inorganic Chemistry
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