55 research outputs found

    Detection and Evaluation of Effective of Digital Communication of Drug on Human Body

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    Nowadays, there is a wide using of mobile and internet from various ages, due to some bad systems which they work to send signals(sound wave frequency) within the music or will be spread to affect the brain of the humankind. Therefore, this paper expresses thedetection and evaluation of (the signal of sound frequency) which influence the human brain, it has been measured some frequency byprogramming in the mobile and found a trend to detect such frequencies and a way to produce a human being from it

    Étude numĂ©rique des comportements mĂ©caniques des jonctions tubulaires soudĂ©es de forme T de sections circulaire et elliptique

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    Les assemblages tubulaires soudĂ©s prĂ©sentent des discontinuitĂ©s structurales importantes et conduisent Ă  de fortes concentrations de contraintes dans les zones d’intersection des tubes mĂ©talliques. Sous un chargement quasi-statique excessif, le voisinage du cordon de soudure pourrait ĂȘtre plastifiĂ© avec le risque de l’effondrement brusque de la structure. Ainsi, la prĂ©sente Ă©tude consiste Ă  : - Ă©tudier l’évolution du coefficient de concentration de contraintes autour des cordons de soudure liant l'entretoise et le manchon pour dĂ©terminer les points chauds. - comparer l’amplitude de ce coefficient autour du pied de cordon d’une jonction de forme T Ă  entretoises circulaires avec celui d’une structure Ă  entretoise elliptique. - comparer les rĂ©ponses Ă©lasto-plastiques des deux structures vis-Ă -vis des sollicitations extĂ©rieures. Pour se faire, on a utilisĂ© les logiciels Patran et Nastran

    Diagnostic Value of (18)F-Fluorodeoxyglucose Positron Emission Tomography Computed Tomography in Prosthetic Pulmonary Valve Infective Endocarditis

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    OBJECTIVES: The aim of this study was to assess the diagnostic performances of (18)F-fluorodeoxyglucose ((18)F-FDG) positron emission tomography (PET)/computed tomography (CT) in congenital heart disease (CHD) patients with pulmonary prosthetic valve or conduit endocarditis (PPVE) suspicion. BACKGROUND: PPVE is a major issue in the growing CHD population. Diagnosis is challenging, and usual imaging tools are not always efficient or validated in this specific population. Particularly, the diagnostic yield of (18)F-FDG PET/CT remains poorly studied in PPVE. METHODS: A retrospective multicenter study was conducted in 8 French tertiary centers. Children and adult CHD patients who underwent (18)F-FDG PET/CT in the setting of PPVE suspicion between January 2010 and May 2020 were included. The cases were initially classified as definite, possible, or rejected PPVE regarding the modified Duke criteria and finally by the Endocarditis Team consensus. The result of (18)F-FDG PET/CT had been compared with final diagnosis consensus used as gold-standard in our study. RESULTS: A total of 66 cases of PPVE suspicion involving 59 patients (median age 23 years, 73% men) were included. Sensitivity, specificity, positive predictive value, and negative predictive value of (18)F-FDG PET/CT in PPVE suspicion were respectively: 79.1% (95% CI: 68.4%-91.4%), 72.7% (95% CI: 60.4%-85.0%), 91.9% (95% CI: 79.6%-100.0%), and 47.1% (95% CI: 34.8%-59.4%). (18)F-FDG PET/CT findings would help to correctly reclassify 57% (4 of 7) of possible PPVE to definite PPVE. CONCLUSIONS: Using (18)F-FDG PET/CT improves the diagnostic accuracy of the Duke criteria in CHD patients with suspected PPVE. Its high positive predictive value could be helpful in routine to shorten diagnosis and treatment delays and improve clinical outcomes.L'Institut de Rythmologie et modélisation Cardiaqu

    Goodbye Hartmann trial: a prospective, international, multicenter, observational study on the current use of a surgical procedure developed a century ago

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    Background: Literature suggests colonic resection and primary anastomosis (RPA) instead of Hartmann's procedure (HP) for the treatment of left-sided colonic emergencies. We aim to evaluate the surgical options globally used to treat patients with acute left-sided colonic emergencies and the factors that leading to the choice of treatment, comparing HP and RPA. Methods: This is a prospective, international, multicenter, observational study registered on ClinicalTrials.gov. A total 1215 patients with left-sided colonic emergencies who required surgery were included from 204 centers during the period of March 1, 2020, to May 31, 2020. with a 1-year follow-up. Results: 564 patients (43.1%) were females. The mean age was 65.9 ± 15.6 years. HP was performed in 697 (57.3%) patients and RPA in 384 (31.6%) cases. Complicated acute diverticulitis was the most common cause of left-sided colonic emergencies (40.2%), followed by colorectal malignancy (36.6%). Severe complications (Clavien-Dindo ≄ 3b) were higher in the HP group (P < 0.001). 30-day mortality was higher in HP patients (13.7%), especially in case of bowel perforation and diffused peritonitis. 1-year follow-up showed no differences on ostomy reversal rate between HP and RPA. (P = 0.127). A backward likelihood logistic regression model showed that RPA was preferred in younger patients, having low ASA score (≀ 3), in case of large bowel obstruction, absence of colonic ischemia, longer time from admission to surgery, operating early at the day working hours, by a surgeon who performed more than 50 colorectal resections. Conclusions: After 100 years since the first Hartmann's procedure, HP remains the most common treatment for left-sided colorectal emergencies. Treatment's choice depends on patient characteristics, the time of surgery and the experience of the surgeon. RPA should be considered as the gold standard for surgery, with HP being an exception

    Multimodal assessment of the healing process of atrial septal defect percutaneous closure devices

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    La fermeture percutanĂ©e est le traitement de rĂ©fĂ©rence des communications interatriales (CIA). AprĂšs son implantation, une cicatrisation du dispositif est classiquement attendue aprĂšs quelques mois ; il semble cependant qu’un recouvrement incomplet ou partiel puisse ĂȘtre observĂ© dans de rares cas, sans que l’on en connaisse les mĂ©canismes impliquĂ©s. Cette cicatrisation imparfaite du dispositif est associĂ©e Ă  la survenue de complications retardĂ©es. Dans le cadre de cette thĂšse nous avons Ă©tudiĂ© la cicatrisation de ces prothĂšses de CIA, en nous focalisant sur les processus de recouvrement et d’endothĂ©lialisation des dispositifs, Ă  travers une approche translationnelle incluant expĂ©rimentations in vitro, modĂšle animal chronique et Ă©tude clinique. A la fin de ce travail, il est possible de conclure que : 1) il existe des cas de complications au long cours aprĂšs fermeture de CIA, liĂ©es Ă  un dĂ©faut de recouvrement du dispositif, 2) sur une large cohorte pĂ©diatrique avec un suivi allant jusqu’à 18 ans aprĂšs l’implantation, l’incidence de ces complications est faible 3) les modĂšles animaux, utilisĂ©s seuls, ne peuvent suffire Ă  expliquer ni Ă  avancer dans la comprĂ©hension de ce phĂ©nomĂšne, 4) il n’existe pas de diffĂ©rences significatives concernant le processus de recouvrement entre les 3 prothĂšses analysĂ©es au cours de ce travail, 5) une Ă©valuation non invasive et individualisĂ©e du recouvrement prothĂ©tique , grĂące aux techniques d’imagerie, est une perspective prometteuse. Ces donnĂ©es montrent qu’une meilleure comprĂ©hension du processus de recouvrement prothĂ©tique passe par la rĂ©alisation conjointe d’études fondamentales et cliniques. Cependant, le dĂ©veloppement d’outils permettant une Ă©valuation individualisĂ©e du recouvrement doit ĂȘtre poursuivi, du fait de leur fort potentiel de translation clinique et de leur capacitĂ© Ă  optimiser la prise en charge du patient.The percutaneous device closure is the gold treatment of atrial septal defect (ASD). After implantation, device healing is classically expected following several months; however, an incomplete or partial covering of the device may be observed without a full knowledge of the underlying mechanisms. In this thesis we studied the healing of these intracardiac prostheses, focusing on the covering and endothelialization processes of devices, approach through a translational approach including in vitro experiments, chronic animal model and clinical study. At the end of this work, it is possible to conclude that 1) there are cases of long-term complications after closure of CIA, related to a lack of recovery of the device, 2) in a large cohort of pediatric with a follow up of up to at 18 years after implantation, the incidence of these complications is low 3) animal models, used alone, can not suffice to explain or improve the understanding of this complex process, 4) there is no significant differences in the covering process between the 3 prostheses analyzed during this work, 5) a non-invasive and individualized assessment of prosthetic recovery, using imaging techniques, is a promising perspective with significant potential for clinical translation . These data show that a better understanding of device healing process needs the joint undertake of basic and clinical studies. Moreover, the development of tools for individualized assessment of device covering should be pursued in parallel, due to their high translational potential, in order to optimize patient management

    Evaluation multimodale du processus de cicatrisation des dispositifs de fermeture percutanée des communications inter-atriales

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    The percutaneous device closure is the gold treatment of atrial septal defect (ASD). After implantation, device healing is classically expected following several months; however, an incomplete or partial covering of the device may be observed without a full knowledge of the underlying mechanisms. In this thesis we studied the healing of these intracardiac prostheses, focusing on the covering and endothelialization processes of devices, approach through a translational approach including in vitro experiments, chronic animal model and clinical study. At the end of this work, it is possible to conclude that 1) there are cases of long-term complications after closure of CIA, related to a lack of recovery of the device, 2) in a large cohort of pediatric with a follow up of up to at 18 years after implantation, the incidence of these complications is low 3) animal models, used alone, can not suffice to explain or improve the understanding of this complex process, 4) there is no significant differences in the covering process between the 3 prostheses analyzed during this work, 5) a non-invasive and individualized assessment of prosthetic recovery, using imaging techniques, is a promising perspective with significant potential for clinical translation . These data show that a better understanding of device healing process needs the joint undertake of basic and clinical studies. Moreover, the development of tools for individualized assessment of device covering should be pursued in parallel, due to their high translational potential, in order to optimize patient management.La fermeture percutanĂ©e est le traitement de rĂ©fĂ©rence des communications interatriales (CIA). AprĂšs son implantation, une cicatrisation du dispositif est classiquement attendue aprĂšs quelques mois ; il semble cependant qu’un recouvrement incomplet ou partiel puisse ĂȘtre observĂ© dans de rares cas, sans que l’on en connaisse les mĂ©canismes impliquĂ©s. Cette cicatrisation imparfaite du dispositif est associĂ©e Ă  la survenue de complications retardĂ©es. Dans le cadre de cette thĂšse nous avons Ă©tudiĂ© la cicatrisation de ces prothĂšses de CIA, en nous focalisant sur les processus de recouvrement et d’endothĂ©lialisation des dispositifs, Ă  travers une approche translationnelle incluant expĂ©rimentations in vitro, modĂšle animal chronique et Ă©tude clinique. A la fin de ce travail, il est possible de conclure que : 1) il existe des cas de complications au long cours aprĂšs fermeture de CIA, liĂ©es Ă  un dĂ©faut de recouvrement du dispositif, 2) sur une large cohorte pĂ©diatrique avec un suivi allant jusqu’à 18 ans aprĂšs l’implantation, l’incidence de ces complications est faible 3) les modĂšles animaux, utilisĂ©s seuls, ne peuvent suffire Ă  expliquer ni Ă  avancer dans la comprĂ©hension de ce phĂ©nomĂšne, 4) il n’existe pas de diffĂ©rences significatives concernant le processus de recouvrement entre les 3 prothĂšses analysĂ©es au cours de ce travail, 5) une Ă©valuation non invasive et individualisĂ©e du recouvrement prothĂ©tique , grĂące aux techniques d’imagerie, est une perspective prometteuse. Ces donnĂ©es montrent qu’une meilleure comprĂ©hension du processus de recouvrement prothĂ©tique passe par la rĂ©alisation conjointe d’études fondamentales et cliniques. Cependant, le dĂ©veloppement d’outils permettant une Ă©valuation individualisĂ©e du recouvrement doit ĂȘtre poursuivi, du fait de leur fort potentiel de translation clinique et de leur capacitĂ© Ă  optimiser la prise en charge du patient

    Evaluation du substrat arythmogÚne ventriculaire chez les patients opérés d'une tétralogie de Fallot (rÎle des isthmes anatomiques)

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    INTRODUCTION : La réparation chirurgicale de la tétralogie de Fallot (TF) induit des cicatrices sur le ventricule droit (VD) prédisposant à la survenue tardive de tachycardies ventriculaires (TV). Le mécanisme de ces TV est une réentrée impliquant des isthmes anatomiques. Nous avons évalué les caractéristiques électrophysiologiques de ces isthmes et leur corrélation à l'inductibilité chez les patients opérés d'une TF. METHODES : Nous avons inclus les patients TF admis pour un cathétérisme pré opératoire ou pour une procédure d'ablation d'arythmie. Ils ont bénéficié d'un ECG 12 dérivations, d'une échocardiographie, d'une imagerie par résonance magnétique et d'une étude électrophysiologique avec cartographie du VD et stimulation ventriculaire. En cas de déclenchement de TV, nous cartographions le circuit afin de définir l'isthme impliqué et procédons à son ablation. Nous avons ensuite calculé les vitesses de conduction ainsi que la taille des différents isthmes. RESULTATS : 18 patients (35 +- 12 ans) ont été admis pour TV soutenue (n = 2), extrasystoles ventriculaires (n = 3), flutter commun (n = 2) et cathétérisme avant valvulation pulmonaire (n = 11). 5 patients (29 % étaient inductibles (TV soutenue monomorphe, cycle moyen = 280 +- 79 ms). Le nombre moyen d'isthmes par patient était 1,9 +- 0,7. Les patients inductibles avaient une vitesse de conduction au sein des isthmes critiques en rythme sinusal significativement inférieure (p = 0,03) aux patients non inductibles. Une vitesse de conduction dans un isthme anatomique en rythme sinusal < 0,4 m/s était prédictive d'inductibilité avec une sensibilité de 100 % et une spécificité de 75 %. CONCLUSION : Une vitesse de conduction lente en rythme sinusal au sein des isthmes anatomiques est associée à l'inductibilité et pourrait constituer un facteur de risque de TV chez les patients opérés d'une TF.BORDEAUX2-BU Santé (330632101) / SudocSudocFranceF
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