[EASYSCAN: French pilot study for securing drug administration by barcode reading]. / EASYSCAN : étude pilote française pour la sécurisation de l'administration des médicaments par lecture code-barres.

OBJECTIVES: Medication errors are common at the time of administration. To prevent them, technologies allowing consistency check by bar code technology at bedside have been developed. Our study focuses on the evaluation of a BarCode Medication Administration (BCMA) called EASYSCAN with Electronic Medication Administration Record (e-MAR) to verify both patient's identity and medication to be administrated. METHODS: A prospective observational study was conducted during seven weeks in a French medicine ward. The performance of the system was evaluated by the success rate of BCMA and by the average time for administration with and without EASYSCAN. A satisfaction questionnaire about BCMA was proposed to nurses. RESULTS: We observed 182 administrations including 87 (48%) with EASYSCAN. The verification of the patient's identity was successful in 77% of administrations and 65% of the drugs were scanned successfully. The main causes of check failures were the lack of datamatrix on the drug (81%), error messages (14%) and the lack of system functionality (5%). The average time for administration per patient was significantly increased: 4.68min/patient with versus 2.87min/patient without EASYSCAN. CONCLUSIONS: The study shows the EASYSCAN's performance in its first version. Material and software evolutions and an increase of nurses'pratices will be necessary to continue the experimentation of this system still unpublished in France.

Combined SERS/DFT studies of push-pull chromophore self-assembled monolayers: insights into their surface orientation.

Having clear and deep information on the surface/interface of deposited molecules is of crucial importance for the development of efficient optoelectronic devices. This paper reports on a joint experimental/theoretical hybrid approach based on Raman spectroscopy in order to provide information on the orientation of push-pull chromophores deposited onto a gold surface. In addition, several parameters can strongly control or impede the orientation of such molecules on the surface such as: the molecular structure, the surface itself, the method of deposition and the solvents used. From this approach, additional information has been highlighted such as perpendicularly depositing the molecule on the surface, the bithiophene compounds displaying more solvent effects compared to terthiophene molecules and so on. According to the results, the joint SERS/DFT study proves to be an effective tool for probing the arrangement of push-pull chromophores and selecting the right experimental conditions to tune the surface properties.

Longitudinal and transverse Zeeman ladders in the Ising-like chain antiferromagnet BaCo(2)V(2)O(8).

We explore the spin dynamics emerging from the Néel phase of the chain compound antiferromagnet BaCo(2)V(2)O(8). Our inelastic neutron scattering study reveals unconventional discrete spin excitations, so-called Zeeman ladders, understood in terms of spinon confinement, due to the interchain attractive linear potential. These excitations consist of two interlaced series of modes, respectively, with transverse and longitudinal polarization. The latter, which correspond to a longitudinal fluctuation of the ordered moment, have no classical counterpart and are related to the zero-point fluctuations that weaken the ordered moment in weakly coupled quantum chains. Our analysis reveals that BaCo(2)V(2)O(8), with moderate Ising anisotropy and sizable interchain interactions, remarkably fulfills the conditions necessary for the observation of discrete long-lived longitudinal excitations.

Prevalence and effects of mycotoxins on poultry health and performance, and recent development in mycotoxin counteracting strategies.

Extensive research over the last couple of decades has made it obvious that mycotoxins are commonly prevalent in majority of feed ingredients. A worldwide mycotoxin survey in 2013 revealed 81% of around 3,000 grain and feed samples analyzed had at least 1 mycotoxin, which was higher than the 10-year average (from 2004 to 2013) of 76% in a total of 25,944 samples. The considerable increase in the number of positive samples in 2013 may be due to the improvements in detection methods and their sensitivity. The recently developed liquid chromatography coupled to (tandem) mass spectrometry allows the inclusion of a high number of analytes and is the most selective, sensitive, and accurate of all the mycotoxin analytical methods. Mycotoxins can affect the animals either individually or additively in the presence of more than 1 mycotoxin, and may affect various organs such as gastrointestinal tract, liver, and immune system, essentially resulting in reduced productivity of the birds and mortality in extreme cases. While the use of mycotoxin binding agents has been a commonly used counteracting strategy, considering the great diversity in the chemical structures of mycotoxins, it is very obvious that there is no single method that can be used to deactivate mycotoxins in feed. Therefore, different strategies have to be combined in order to specifically target individual mycotoxins without impacting the quality of feed. Enzymatic or microbial detoxification, referred to as "biotransformation" or "biodetoxification," utilizes microorganisms or purified enzymes thereof to catabolize the entire mycotoxin or transform or cleave it to less or non-toxic compounds. However, the awareness on the prevalence of mycotoxins, available modern techniques to analyze them, the effects of mycotoxicoses, and the recent developments in the ways to safely eliminate the mycotoxins from the feed are very minimal among the producers. This symposium review paper comprehensively discusses the above mentioned aspects.

Coexistence and interplay of superconductivity and ferromagnetism in URhGe.

As ferromagnetism and superconductivity are usually considered to be antagonistic, the discovery of their coexistence in UGe(2), URhGe, UIr and UCoGe has attracted a lot of interest. The mechanism to explain such a state has, however, not yet been fully elucidated. In these compounds superconductivity may be unconventional: Cooper pairs could be formed by electrons with parallel spins and magnetic fluctuations might be involved in the pairing mechanism. URhGe becomes ferromagnetic below a Curie temperature of 9.5 K, with a spontaneous moment aligned to the c-axis. For temperatures below 260 mK and fields lower than 2 T, superconductivity was first observed in 2001. Recently, we discovered a second pocket of superconductivity. This new pocket of superconductivity appears at higher fields applied close to the b-axis, enveloping a sudden magnetic moment rotation transition at H(R) = 12 T. Detailed studies of the field induced metamagnetic transition and superconductivity are presented. The possibility that magnetic fluctuations emerging from a quantum critical point provide the pairing mechanism for superconductivity is discussed.

HOPE, an open platform for medical data management on the grid.

The paper describes a platform developed for the secure management and analysis of medical data and images in a grid environment. Designed for telemedicine and built upon the EGEE gLite middleware and particularly the metadata catalogue AMGA as well as the GridSphere web portal, the platform provides to healthcare professionals the capacity to upload and query medical information stored over distributed servers. A job submission environment is also available for data analysis. Security features include authentication and authorization by grid certificates, anonymization of medical data and image encryption. The platform is currently deployed on several sites in Europe and Asia and is being customized for applications in the field of telemedicine and medical physics.

Enzymatic hydrolysis of fumonisins in the gastrointestinal tract of broiler chickens.

Fumonisins (FB) are among the most frequently detected mycotoxins in feedstuffs and finished feed, and recent data suggest that the functions of the gastrointestinal tract (GIT) in poultry species might be compromised at doses ranging from 10 to 20 mg/kg, close to field incidences and below the US and EU guidelines. Strategies are therefore necessary to reduce the exposure of poultry to FB. In the present study, we assessed the efficacy of fumonisin esterase FumD (EC 3.1.1.87, commercial name FUMzyme®) to cleave the tricarballylic acid side chains of FB, leading to the formation of non-toxic hydrolyzed fumonisins in the GIT of broiler chickens. Broiler chickens were fed for 14 d (7 to 21 d of age) 3 different diets (6 birds/cage, 6 cages/diet), i) control feed (negative control group), ii) feed contaminated with 10 mg FB/kg (FB group), and iii) feed contaminated with 10 mg FB/kg and supplemented with 100 units of FUMzyme®/kg (FB+FUMzyme® group). To determine the degree of reduction of FB in the GIT, 2 characteristics were analyzed. First, the sphinganine-to-sphingosine ratio in the serum and liver was determined as a biomarker of effect for exposure to FB. Second, the concentration of fumonisin B1 and its hydrolyzed forms was evaluated in the gizzard, the proximal and distal parts of the small intestine, and the excreta. Significantly reduced sphinganine-to-sphingosine ratios in the serum and liver of the FB+FUMzyme® group (serum: 0.15 ± 0.01; liver: 0.17 ± 0.01) compared to the FB group (serum: 0.20 ± 0.01; liver: 0.29 ± 0.03) proved that supplementation of broiler feed with FUMzyme® was effective in partially counteracting the toxic effect of dietary FB. Likewise, FB concentrations in digesta and excreta were significantly reduced in the FB+FUMzyme® group compared to the FB group (P < 0.05; up to 75%). FUMzyme® furthermore partially counteracted FB-induced up-regulation of cytokine gene expression (IL-8 and IL-10) in the jejunum. The FB group showed significantly higher gene expression of IL-8 and IL-10 compared to the negative control group (IL-8: fold change = 2.9 ± 1.1, P < 0.05; IL-10: fold change = 3.6 ± 1.4, P < 0.05), whereas IL-8 and IL-10 mRNA levels were not significantly different in the FB+FUMzyme®® group compared to the other 2 groups. In conclusion, FUMzyme® is suitable to detoxify FB in chickens and maintain gut functions.

Pulmonary blood flow distribution during partial liquid ventilation.

Regional pulmonary blood flow was investigated with radiolabeled microspheres in four supine lambs during the transition from conventional mechanical ventilation (CMV) to partial liquid ventilation (PLV) and with incremental dosing of perfluorocarbon liquid to a cumulative dose of 30 ml/kg. Four lambs supported with CMV served as controls. Formalin-fixed, air-dried lungs were sectioned according to a grid; activity was quantitated with a multichannel scintillation counter, corrected for weight, and normalized to mean flow. During CMV, flow in apical and hilar regions favored dependent lung (P < 0.001), with no gradient across transverse planes from apex to diaphragm. During PLV the gradient within transverse planes found during CMV reversed, most notably in the hilar region, favoring nondependent lung (P = 0.03). Also during PLV, flow was profoundly reduced near the diaphragm (P < 0.001), and across transverse planes from apex to diaphragm a dose-augmented flow gradient developed favoring apical lung (P < 0.01). We conclude that regional flow patterns during PLV partially reverse those noted during CMV and vary dramatically within the lung from apex to diaphragm.

Normal blood-glucose concentration which range for what?

Two definitions of normality ("isolated" or "correlated") are considered. The boundaries of "isolated" normality were determined by a statistical procedure, whereas the "correlated" approach was related to a clinical or predictive definition. In the latter case, the biological variations were considered abnormal if they implied a hazard with some significant future ailment as a risk factor. In this pragmatic approach, the upper limit of normal/abnormal variations is the point beyond which medical strategy is related to the most expected benefit when applied to a definite population or to an individual patient. The capacity of a diagnostic test to discriminate between patients with a defined risk and those without risk depends strictly on the value of the parameter chosen. In medical care for the prevention of vascular complications in diabetic patients or with foetal risks in pregnant women, the limits of the so-called normal range of glycaemia and other parameters should be determined according to the objective of the preventive and/or therapeutic measures to be prescribed.

Pyruvate dehydrogenase, lipoamide dehydrogenase and citrate synthase activity in fibroblasts from patients with Friedreich's and Charlevoix-Saguenay ataxia.

The activity of lipoamide dehydrogenase and two closely related enzymes was studied simultaneously in early, mild, and late passage fibroblast cultures. Friedreich's ataxia fibroblasts tended to lose pyruvate dehydrogenase and citrate synthase activities, while lipoamide dehydrogenase activity remained constant with aging of the cells. Mean pyruvate dehydrogenase activity was lower over-all in fibroblasts from ataxics. Mean citrate synthase activity was higher in ataxic fibroblasts. Present tissue culture media do not represent the best conditions in which to reproduce cofactor binding defects such as those found in other genetic diseases with structural enzyme mutations.

Lipoamide dehydrogenase in Friedreich's ataxia fibroblasts.

Lipoamide dehydrogenase was measured in cultivated skin fibroblasts from twelve patients with Friedreich's ataxia and nine normal controls. No difference in specific activity, subcellular distribution and Vmax or Km was observed between patients and controls.

Dicarboxylic amino acid uptake in normal, Friedreich's ataxia, and dicarboxylic aminoaciduria fibroblasts.

Glutamic and aspartic acid uptake was measured in skin fibroblasts from patients with Friedreich's Ataxia, dicarboxylic aminoaciduria, and normal individuals. The results showed no difference in uptake kinetics of either dicarboxylic amino acids between Friedreich's Ataxia and normal cells, but reduced uptake velocities in dicarboxylic aminoaciduria fibroblasts. Friedreich's Ataxia fibroblasts were, however, less calcium-dependent and more magnesium and phosphate-dependent than controls in glucose-free incubation mixture. This difference might be related to some degree of glucose intolerance by Friedreich's Ataxia fibroblasts in culture.

Effect of timolol vs. acetazolamide on sodium hyaluronate-induced rise in intraocular pressure after cataract surgery.

This prospective study was done to compare the efficacy of timolol and acetazolamide in lowering the intraocular pressure (IOP) secondary to the use of sodium hyaluronate (Healon) in cataract surgery. Fifty patients undergoing extracapsular cataract extraction and implantation of a posterior chamber lens were randomly assigned to one of four treatment groups: no viscoelastic (10 patients), Healon with 0.5% timolol drops postoperatively (12 patients), Healon with acetazolamide postoperatively (16 patients), or Healon only (12 patients). The IOP was measured during the first 24 hours after surgery. Sodium hyaluronate caused a marked increase in IOP in the early (6 to 12 hours) postoperative period. Timolol proved to be more effective than acetazolamide in controlling this pressure increase.

High-frequency oscillatory ventilation in pediatric patients.

High-frequency oscillatory ventilation (HFOV) offers the potential to maintain adequate gas exchange without imposing the large pressure swings and tidal volumes associated with ventilatory-induced lung injury. This article reviews the studies evaluating the use of HFOV to treat pediatric respiratory failure, discusses the complications associated with HFOV, and details an approach to the practical application of HFOV in the non-neonatal pediatric population.

[Are theophylline determinations useful to the clinician during treatment with a sustained-release form of theophylline?]. / Les dosages de théophylline sont-ils utiles au clinicien au cours des traitements par théophylline à libération continue?

The aims of the study were the correlation between dosage and plasmatic levels of slow release theophylline and the reason for dosage adjustment. 64 pharmacokinetic studies were performed in 58 asthmatic children between 17 months and 16 years. Plasmatic levels of theophylline were performed by fluoroimmunology technique at H0 (before the dose) 2 (H2), 4 (H4), 6 (H6) and 8 (H8) hours after the dose of slow release theophylline. The best correlation between dose and plasmatic levels were observed at H4 and H6 for Armophylline and Euphylline respectively. Dosage adjustment were based both upon clinical state and plasmatic levels in 55 cases. In 9 cases the modification of dose were decided only because of plasmatic levels out the therapeutic range. The authors proposed a schema of dosage modifications based upon clinical state; plasmatic levels must be used as a guide for dose adjustment in patients clinically uncontrolled.

[What should medical decision be based on?]. / Au nom de quoi décider?

Medical decision making is basically related to three criteria: 1) estimated effectiveness in terms of objective and subjective results: 2) equity related to the concept of justice in the societal context; 3) legitimacy according to the willingness to pay of the society, its resource availability and the fraction of its income that is allowed to be spent for health care. A worsening dilemma is unescapable between a utilitarian medical project, and the traditional hippocratic rule of rescue no matter what the cost may be. Every care taker should be involved to give a clear account of medical decision in order to generate and adopt some acceptable view for a reliable implementation with respect to equity and justice.

[Must we justify our medical decisions?]. / Faut-il justifier nos décisions médicales?

To provide an equal or better health care with limited resources, is an inescapable constraint for health care providers. Every physician and clinical decision maker must now account for economical and technical resources that are to be invested in diagnostic and therapeutic procedures, in public as well as in private medical practice. Every medical decision must be endorsed in relation with the expected benefits and risks for the patient and/or the society. Methods and protocols must provide a definite efficiency and rely on a better management of resources allowed to health services and facilities. Words, concepts and basic principles of medical decision analysis are inescapable tools to cope with uncertainty, to evaluate medical decisions according to their expected consequences, objective and subjective, for a definite patient in a bedside situation, as for a larger community. In a context of economic constraint, rational decision analysis is a prerequisite for a better quality of care, optimizing expected results, personal preferences and expenses of financial, technical and human resources in order to save time, risks and suffering.

[Pain and postoperative analgesia after craniotomy]. / La douleur après une craniotomie et l'analgésie postopératoire.

Neurosurgery has for a long time been considered as a minimal painful surgery. This explains why there are few references in the literature concerning postoperative neurosurgical pain. Recent papers have demonstrated that even if postoperative pain is less important than in other specialities, such pain exists and should be taken care of. Rapid neurological recovery is now possible because of the progress in the surgical techniques and the introduction of new anaesthetic drugs. This implies a strict postoperative analgesic strategy in order to avoid both direct and indirect complications associated with pain. In this respect, the use of remifentanil or other techniques like target-controlled injection of opioids should absolutely be considered. In most cases, class I and II analgesics seem to provide optimal pain relief. However, for some patients, the use of an opioid may be required.

[Azlocillin treatment of Pseudomonas aeruginosa bronchopulmonary infections in children with cystic fibrosis]. / Traitement par l'azlocilline des infections broncho-pulmonaires à pyocyanique chez les enfants atteints de mucoviscidose.

From April, 1980 to December, 1981 ten children aged from 2 to 14 years presenting with cystic fibrosis were admitted to hospital for exacerbation of their chronic bronchial infection. Mucous Pseudomonas aeruginosa was present in sputum. Seven of the 10 strains isolated were susceptible to azlocillin and 3 were classified as intermediate. Eight children were treated with azlocillin alone in doses of 200-300 mg/kg/day and two with combined azlocillin 300 mg/kg/day and amikacin 16 and 23 mg/kg/day respectively. In both groups the antibiotics were administered 8-hourly by short (30 min) intravenous infusions and the duration of treatment ranged from 8 to 21 days (mean 14 days). Both drugs were well tolerated. Antibacterial activity was assessed as "cure" when Pseudomonas could not be isolated in sputum for at least 2 weeks after the end of the treatment, as "relapse" when that organism reappeared in sputum within the same period of time, and as "failure" when it persisted in sputum. On this account, among the 8 children treated with azlocillin alone 3 were cured, one relapsed and 4 failed. One of the two children treated with the azlocillin-amikacin association was cured, the other failed. Clinical results correlated roughly with antibacterial activity. Five distinct improvements were observed: 2 were associated with bacteriological cure, 2 with transient eradication followed by relapse and 1 occurred although the responsible organism persisted in bronchial secretions. Two children showed poor clinical results; 2 with failure and 1 with bacteriological cure. In two other children treatment was ineffective both clinically and bacteriologically. This study confirms that high parenteral doses of azlocillin have a beneficial effect on exacerbations with Ps. aeruginosa of chronic bronchial infection in cystic fibrosis. Clinical improvement usually correlates with antibacterial activity when the organism is eliminated, even temporarily, from bronchial secretions. The synergistic azlocillin-aminoglycoside association should probably be recommended, at least to reduce the risk of emergence of resistant strains.

[Comparison of two measurement methods: the Bland and Altman assessment]. / Comparaison de deux méthodes de mesure d'une même grandeur: méthode de Bland et Altman.

Bland-Altman analysis for comparison of two methods of clinical measurement is frequently used in scientific publications. This article is more appropriate than the conventional linear regression analysis. This paper gives an overview of the principles for the use of Bland-Altman analysis as well as the specific terminology attached to it. The Bland-Altman comparison analysis is mainly a tool for clinical interpretation. The bias and the agreement limits provide the variation of the values of the technique compared to the other. The difference between the two methods of measurement is plotted against the average obtained with each of the two techniques. Bland-Altman analysis can also be used to check the repeatability of a measurement technique within the same subject and to determine a repeatability coefficient. With an adaptation of the calculation of the agreement limits, the average of multiple measurements for each subject with two measurement techniques can be used for the Bland-Altman analysis.