Journal articles: 'Calcul in situ'

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SAUVANT, D., and P. NOZIÈRE. "La quantification des principaux phénomènes digestifs chez les ruminants : les relations utilisées pour rénover les systèmes d’unités d’alimentation énergétique et protéique." INRAE Productions Animales 26, no. 4 (August 18, 2013): 327–46. http://dx.doi.org/10.20870/productions-animales.2013.26.4.3162.

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L’évolution des systèmes d’unités d’alimentation des ruminants vers des systèmes de lois de réponses multiples nécessite d’actualiser le calcul des apports nutritifs à l’animal, afin de le rendre plus précis sur les unités agrégées (UF et PDI) et plus évolutif (prédiction des nutriments absorbés). Cette actualisation est basée sur la construction et l’interprétation par méta-analyse, de larges bases de données sur la digestion et la nutrition des ruminants. Les différentes équations utilisées pour le calcul des apports UF et PDI ont ainsi été mises à jour, ce qui permet en particulier : i) de prévoir le transit des particules et des liquides en fonction du niveau d’ingestion et de la proportion de concentré, et de prendre en compte les variations de transit dans le calcul des dégradations des protéines et de l’amidon dans le rumen, estimées à partir des données issues de mesures in situ; ii) de prendre en compte les effets des principaux facteurs d’interactions digestives (niveau d’ingestion, proportion de concentré, balance protéique du rumen) sur la digestibilité de la matière organique, les pertes d’énergie sous forme de méthane et sous forme d’urine ; iii) de calculer plus précisément l’énergie disponible dans le rumen et son efficacité d’utilisation pour la synthèse de protéines microbiennes. Ce modèle rénové de la digestion chez les ruminants conduit à considérer que les valeurs UF et PDI des aliments varient en fonction de la ration dans laquelle ils sont incorporés, les valeurs des tables étant indicatives. Il est ainsi possible de prédire plus précisément les apports sur une plus large gamme de régimes, et en particulier de mieux traiter des interactions entre les apports en énergie et en protéines.

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Champagne de Labriolle, Guillaume. "Détermination de la fenêtre de pilotage de la pression de confinement d’un tunnelier fermé dans un sol cohérent-frottant ou purement cohérent." Revue Française de Géotechnique, no. 155 (2018): 3. http://dx.doi.org/10.1051/geotech/2018005.

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La détermination de la fenêtre de pilotage de la pression de confinement lors de la conception et de l’exécution d’un tunnel au tunnelier est essentielle afin de garantir la sécurité des travaux, l’intégrité des avoisinants, et la qualité de la mise en œuvre. Dans cet article est d’abord présentée une méthodologie mettant l’accent sur la relation entre le contexte réglementaire de l’Eurocode 7, puis les différents types de calcul à mettre en œuvre. L’article présente par la suite une amélioration des méthodes analytiques existantes vis-à-vis de la stabilité du front de taille. Dans la continuité des nombreux travaux de recherche sur ce thème, on montre que notre approche est à la fois plus adaptée aux conditions rencontrées (tunnel circulaire, conditions multicouches, conditions drainées ou non drainées) et plus robuste théoriquement (nouveau choix pour le coefficient de poussée latéral, comparaison vis-à-vis des méthodes de type analyse limite définissant des bornes théoriques) tout en étant cohérente avec l’allure des mécanismes de rupture réellement observés in situ ou en laboratoire.

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Poligot-Pitsch, Stéphanie, Pierre Marchand, Aurélie Tisserand, Alexandre Pirolley, Bernard Héry, Christian Salles, Marie-Andrée Arago, Frédéric Hernandez, Claire Rodier, and Marie George Tournoud. "Hydrométrie et continuité écologique : méthodes pour un compromis entre sensibilité et franchissabilité." La Houille Blanche, no. 5-6 (October 2018): 58–65. http://dx.doi.org/10.1051/lhb/2018052.

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Dans beaucoup de régions, le contexte physique et la sévérité des étiages que les cours d'eau connaissent ont conduit les hydromètres à utiliser de nombreux seuils comme contrôles hydrauliques afin de fiabiliser les mesures des bas débits. L'amélioration de l'état écologique des cours d'eau requiert a contrario une diminution des obstacles à la continuité écologique. La DREAL Pays de la Loire s'est donc impliquée pour rechercher des solutions de compromis et une méthodologie d'étude évitant le cas par cas pour aboutir à des principes directeurs pour l'étude et le dimensionnement des modifications des seuils. Dans le même temps, l'UMR Hydrosciences de Montpellier étudiait un remodelage d'un seuil implanté près de l'exutoire du tributaire principal de l'étang de Thau, en France, la rivière Vène. L'enjeu essentiel est d'intégrer au seuil existant, un dispositif de montaison de l'anguille européenne (Anguilla anguilla) et de conserver la sensibilité de la mesure pour les conditions de crue tout en améliorant la sensibilité en période d'étiage. Lors de cette étude, on retrouve en filigrane les principes directeurs établis par la DREAL Pays de la Loire. Ceux-ci, établis par croisement des contraintes de l'hydrométrie et de la continuité écologique, consistent à privilégier un profil de seuil à crête épaisse et présentant une encoche, la concentration de l'écoulement à faible débit étant conjointement favorable. L'article propose des exemples de dimensionnement par le calcul et par prototype modifiable in-situ.

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Gademer, Antoine, Loïca Avanthey, Laurent Beaudouin, Michel Roux, and Jean-Paul Rudant. "Micro-charges utiles dédiées à l'acquisition de données par drone pour l'étude des zones naturelles." Revue Française de Photogrammétrie et de Télédétection, no. 213 (March 31, 2017): 19–31. http://dx.doi.org/10.52638/rfpt.2017.192.

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Les dernières années ont montré l'intérêt croissant de la télédétection basse altitude (TBA) pour l'étude de zones na-turelles. Mais au-delà de la problématique d'accès au milieu, la cartographie de ces zones à grande échelle pose denombreuses contraintes sur la partie capteurs d'acquisition. En effet, ce sont des milieux difficiles pour les algorithmesclassiques de traitement d'images : intrinsèquement en mouvement (aux échelles d'observations des individus), com-posés d'objets difficilement discernables, ces milieux présentent des conditions météorologiques variables, voir hostiles(éclairage, humidité, température, etc.). Cette cartographie se place généralement dans une étude thématique qui ra-joute ses propres contraintes opérationnelles (besoin d'information 3D comme le relief ou la rugosité, signature spectralespécifique, prises de vues obliques pour simplifier l'identification visuelle par les experts, etc.). Par ailleurs, l'utilisationen télédétection basse altitude de porteurs légers, comme les micro-drones, limite fortement les ressources disponiblespour les capteurs : puissance de calcul embarquée, encombrement, poids, etc.. Nous présenterons dans cet article deuxcapteurs : le capteur tri-caméras et le banc stéréoscopique uEye. Le capteur tri-caméras a été développé en 2009 pour l'ac-quisition d'images stéréoscopiques ou obliques à basse altitude. En analysant l'expérience tirée des campagnes terrainseffectuées, nous soulignerons l'importance cruciale de la synchronisation précise des prises de vues. Nous présenteronsalors notre nouveau banc stéréoscopique amphibie en développement depuis 2013, et qui vise la possibilité d'acquisitionsstéréoscopiques parfaitement synchronisées, ce qui en fait un outil idéal pour l'étude des zones littorales (pour la télédé-tection basse altitude ou in situ à faible profondeur). Nous terminerons par une présentation des premiers résultats obtenusavec ce nouveau banc.

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Pavageau, Clémence, Pierre Fischer, Gilles Porel, and Laurent Caner. "Suivi de l’infiltration sur le site expérimental hydrogéologique de Poitiers par tomographie de résistivité électrique." E3S Web of Conferences 504 (2024): 05004. http://dx.doi.org/10.1051/e3sconf/202450405004.

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Le Site Expérimental Hydrogéologique de Poitiers (SEH) a été le lieu d’implantation de deux profils de résistivité électrique, l’un de 47m et l’autre de 23m. Six acquisitions de résistivités apparentes ont été réalisées entre le 18 juillet 2023 et le 17 novembre 2023 afin de calculer les différences de résistivités avec un profil sec et d’obtenir la variation de teneur en eau du sol. Parallèlement, l’installation de différents capteurs sur une station micro-météorologique à 2 mètres de hauteur a permis l’obtention de données hydrologiques (pluviométrie, teneur en eau du sol) et la réalisation de calculs d’évapotranspiration. Après 4 mois de suivi des mesures et le calcul des différences de résistivités, une cohérence entre les données météorologiques et la géophysique est établie et les premiers résultats sont encourageants. Ils permettent d’envisager leur utilisation dans un modèle hydro-géophysique dynamique en time-lapse pour étudier le bilan hydrologique sur le SEH.

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Lopes dos Santos, Alexandre. "Prix Boussinesq 2021 : « Détermination du module de cisaillement des sols sous faibles déformations à partir d’une sonde pressiométrique innovante »." Revue Française de Géotechnique, no. 172 (2022): 5. http://dx.doi.org/10.1051/geotech/2022013.

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L’essai au pressiomètre Ménard est l’essai de référence pour la reconnaissance des sols en vue du dimensionnement des ouvrages géotechniques en France. Réalisé selon les normes en vigueur, il fournit un paramètre de déformation et de rupture du sol, respectivement le module pressiométrique Ménard et la pression limite pressiométrique. Ces paramètres peuvent être utilisés pour la conception de fondations superficielles et profondes sous chargements monotones, en s’appuyant sur des méthodes bien établies et comprises dans les normes d’application nationales françaises de l’Eurocode 7. Cependant, pour certaines structures telles que les fondations soumises à des charges cycliques répétées, les paramètres de calcul à prendre en compte correspondent à un niveau de déformation plus faible, qui ne peut être évalué à l’aide des procédures et des équipements pressiométriques usuels. Cet article présente le travail mené dans le cadre de la thèse de doctorat lauréate du Prix Boussinesq 2021 (Lopes A. 2020. Determination of soil shear modulus at low strain level using an innovative pressuremeter probe. Application to cyclic pile design. Thèse de doctorat). Cette thèse avait pour objectif le développement d’une nouvelle méthode de dimensionnement des fondations profondes sous charges axiales cycliques en utilisant l’essai pressiométrique. La recherche était inscrite dans le contexte du Projet National ARSCOP (nouvelles Approches de Reconnaissance des Sols et de la Conception des Ouvrages géotechniques avec le Pressiomètre). La démarche suivie permettant de surmonter les limitations de la pratique pressiométrique actuelle sera présentée, ainsi que la sonde innovante utilisée et les procédures d’essai et d’interprétation proposées. Les résultats obtenus, d’abord en condition d’essai contrôlée en chambre d’étalonnage au laboratoire, et puis en conditions réelles in situ, permettant de valider les procédures, sont présentés et discutés. Les applications à la pratique de l’ingénierie sont ensuite discutées.

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Gouze, Philippe, Riad Hassani, Dominique Bernard, and Anne Coudrain-Ribstein. "Calcul de l'evolution de la permeabilite des reservoirs sedimentaries contenant des argiles; application a la zone de la faille de Bray (bassin de Paris)." Bulletin de la Société Géologique de France 172, no. 4 (July 1, 2001): 427–36. http://dx.doi.org/10.2113/172.4.427.

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Abstract We propose a model for simulating the changes in porosity and permeability caused by hydrothermal diagenesis in sedimentary aquifer where salinity, temperature and fluid flow vary in space and time. Such modifications of the hydrodynamic properties of the medium are bounded to geochemical reactions and groundwater flow. Fluid velocity is particularly low in deep reservoirs (typically less than 1 m/year). Then, the local equilibrium simplification, which is justified by a set of world-wide data of the chemical composition of groundwater, can be implemented toward straightforward transient calculations. In the model presented here, the coupled processes of fluid flow, temperature and chemical species transport are solved using well established methods. The originality of the model is the development carried on to predict the permeability evolution controlled by the mineral dissolution and precipitation. Usually to simulate permeability changes modelers use the classical porosity-permeability model based on statistical analyses of in situ or laboratory measurements. However, hydraulic conductivity changes are not controlled solely by porosity changes, but also depend on pore-scale structure transformations. Depending on the mineral type, the precipitation or dissolution of the same quantity of volumetric quantity will induce very different changes in the hydraulic conductivity. Principally clay minerals depict a wide range of atypical organisations of different microstructural characteristics of the porous media. The spatial distribution of these characteristics cannot be modelled at basin scale. Away from both too complicated and too unrealistically simplified approach, the model presented here is based on the calculation of the permeability evolution from the change in the mineral fraction due to mineral precipitation and dissolution. To simplify, the minerals are divided into two groups: clay minerals and non-clay minerals. The specific contribution of clay minerals is controlled by a single weighting coefficient. This coefficient is associated to the proportion of poorly connected porosity that characterize clay structure, albeit it is presently impossible to propose any quantitative relationship between the value of this parameter and the microstructural characteristics of the diagenetic clays. The model is tested here to simulate the evolution of the porosity and the permeability in a peculiar zone of the Paris Basin. The study area of several hundred meters large is inside the Dogger aquifer, close to the Bray fault zone where invasion of saline water from Triassic formation takes place. This zone is characterised by high thermal and salinity gradient as well as by the superposition of sub-horizontal regional flow and ascendant fault-controlled flow: it is an ideal case study for examining the importance of taking into account the specific contribution by clay minerals when computing permeability evolution. This study is proposed as a parameter sensibility analysis: - to compare the relative influence of the clay weighting coefficient, the temperature, the salinity, and the cementation exponent on the computed evolution of the permeability, - to discuss the consequences of the introduction of the clay weighting coefficient in comparison to the classical porosity - permeability evolution model, - to simulate various evolution scenarios of past and future thermal and geochemical constraints and their consequences on the evolution of the permeability changes in the Bray fault zone taking into account uncertainties on the value of the clay weighting coefficient and on the cementation exponent. Forty-one simulations of one million years were necessary to cover a large spectrum of the expected variations of each parameter. The results show that: - the local variation of the permeability depends on the time evolution of temperature and of salinity, and on the values of the cementation exponent of the porosity-permeability law and of the clay weighting coefficient. Within reasonable ranges of these four parameters, their influence on the permeability changes is of the same order of magnitude, - the influence of the clay weighting coefficient on the porosity evolution is negligible. Feedback effects of permeability evolution on the porosity evolution, through the change in the flow regime, is minor, - by the use of a classical model without a clay weighting coefficient, permeability and porosity present the same pattern of evolution: they both increase or decrease. By the use of the clay weighting coefficient, in some places the permeability and porosity can show opposite evolution. One increases when the other decreases even for low values of the coefficient, - in the vicinity of the fault, the model predict an increase of permeability independently of potential temperature and salinity modifications and whatever the clay mineral weighting coefficient is: Bray fault sealing is unlikely as long as head gradient is maintained in the fracture zone.

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Breton, C., and C. Marche. "Une aide à la décision pour le choix des interventions en zone inondable." Revue des sciences de l'eau 14, no. 3 (April 12, 2005): 363–79. http://dx.doi.org/10.7202/705424ar.

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Cet article a été réalisé dans le cadre d'un projet de trois ans visant à développer une méthodologie d'analyse, de prévision et de contrôle des risques d'inondation au Québec. Il présente une approche concrète pour calculer les impacts potentiels et le risque d'inondation et utiliser ces résultats afin d'évaluer la situation du risque local, de décider si les impacts doivent être minimisés et de choisir les moyens d'intervention appropriés. Le risque d'inondation est considéré comme étant le produit de la probabilité d'occurrence des crues et des conséquences occasionnées par ces événements. Les pertes de vies potentielles et les dommages directs sont évalués en simulant les niveaux d'eau de différents scénarios d'inondation à partir d'un modèle d'écoulement unidimensionnel non permanent, et en intégrant ces résultats à un logiciel géoréférencé de calcul des dommages d'inondation. L'analyse des impacts et du risque calculé permet de dresser un portrait du montant des dommages annuels potentiels sur les sites habités le long du cours d'eau et un portrait de l'évolution des impacts en fonction de l'amplitude des crues. Cette analyse mène à l'identification des sites où existe un risque jugé inacceptable selon des critères préétablis. Pour chaque site où des interventions sont justifiées par le niveau de risque, des scénarios de minimisation des impacts tenant compte des mécanismes d'inondation sont élaborés et ensuite simulés afin d'en mesurer l'efficacité. Un exemple d'application à un site de la rivière Châteauguay illustre la méthode et les gains pouvant découler de son utilisation.

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Thampi, Silpa, Irshad Cheriya Parambil, Lakshmikanth Halegubbi Karegowda, and Priyanka Priyanka. "Comparison of Urinary Calculi Size Between Bone and Soft Tissue Window in Computed Tomography." Biomedical and Pharmacology Journal 14, no. 1 (March 30, 2021): 323–28. http://dx.doi.org/10.13005/bpj/2129.

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Computed Tomography is an important technique for imaging the urinary calculi using cross sectional images. The size and site of the calculi are significant aspect that are necessary for treatment. Therefore, present study aims to compare diameters of calculi measured using bone and soft tissue window settings in CT and also determinesmost frequent site for occurrence of calculi in urinary system. This is a retrospective study including total of 126 patients (91 males, 35 females, age range: 20-50 years). The patients who had undergone non contrast enhanced computed tomography of Kidney Ureter and Bladder (NCCT KUB) and diagnosed with urinary calculi were included in study. For each calculus found on CT image, two diameters such as maximum diameter and perpendicular diameter was measured on coronal plane using soft tissue and bone window settings. Site of calculi was also noted.To compare diameters measured using soft tissue and bone window settings Wilcoxon signed ranks test was used.Mean of maximum diameter and perpendicular diameter of the calculi measured by soft tissue and bone window settings in CT was 0.74±0.5, 0.82 ±1.8 and 0.79 ± 0.5 ,0.67 ± 0.49 respectively. It was found that there was significant difference in diameters of calculi measured using soft tissue and bone window setting (p<0.0001). The study concludes that there was mean difference of0.08 cms and 0.12 cms for maximum axial diameter and perpendicular diameter respectively measured using soft tissue and bone window settings in CT. Calculi in kidneys was most common site in our study population.

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Maheshwari, Pankaj N., and Hemendra N. Shah. "In-Situ Holmium Laser Lithotripsy for Impacted Urethral Calculi." Journal of Endourology 19, no. 8 (October 2005): 1009–11. http://dx.doi.org/10.1089/end.2005.19.1009.

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Netto, Nelson Rodrigues, Gustavo Caserta Lemos, and Joaquim F. A. Claro. "In Situ Extracorporeal Shock Wave Lithotripsy for Ureteral Calculi." Journal of Urology 144, no. 2 Part 1 (August 1990): 253–54. http://dx.doi.org/10.1016/s0022-5347(17)39425-9.

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Creagh, T. A., N. N. Williams, K. Cronin, M. J. Kerin, J. M. Smith, and J. M. Fitzpatrick. "In situ ESWL for ureteric calculi: The optimum treatment?" Irish Journal of Medical Science 162, no. 9 (September 1993): 348–50. http://dx.doi.org/10.1007/bf02942163.

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Katibov, M. I., A. B. Bogdanov, and Z. A. Dovlatov. "Giant prostatic calculi." Experimental and Сlinical Urology 15, no. 4 (December 25, 2022): 54–59. http://dx.doi.org/10.29188/2222-8543-2022-15-4-54-59.

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Introduction. Large prostatic calculi, which in total occupy almost the entire volume of the prostate gland, are extremely rare. A small number of clinical cases and a variety of treatment methods used in such cases determine the relevance of the study of this problem. Materials and methods. The review is based on articles published throughout history in scientific peer-reviewed journals included in the PubMed database and Elibrary.ru Scientific Electronic Library. The search was performed on the following keywords: «prostatic calculi», «prostate stones», «giant prostatic calculi», «large prostatic calculi», «giant prostatic stones», «large prostatic stones». At the first stage, 115 sources were found, of which 23 articles were included in the review. Results. A total of 20 publications were identified, which included a total of 24 cases of giant prostatic calculi. In 12 (50%) patients of this series of studies, the etiology of calculi was recognized as idiopathic, in 6 (25.0%) – urethral stricture, in 5 (20.8%) – neurogenic bladder, in 1 (4.2%) – eunuchoidism. In 9 (37.5%) patients, prostatic calculi were removed using an open operation: in 6 cases – using transvesical access as in adenomectomy, in 2 cases – using retropubic access as in adenomectomy, in 1 case – using radical nerve-sparing retropubic prostatectomy). In 15 (62.5%) patients, prostatic calculi were removed using endoscopic methods: in 7 cases, transurethral lithotripsy was performed without transurethral resection of the prostate (TURP), in 3 cases – transurethral lithotripsy with preliminary TURP, in 4 cases – TURP followed by extraction of prostatic calculi without crushing them, and in 1 case – in situ lithotripsy by cystotomy. Conclusions. Giant prostatic calculi are extremely rare and mostly secondary. For their removal, both open and endoscopic can be used equally successfully. The small number of works in this area necessitates further research.

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MB, Sule, Shamaki AMB, Umar AU, Gele IH, Yakubu BS, Ribah MM, and Aliyu AZ. "An Obstructive Prostatic Urethral Calculus in a Patient with Urethral Strictures: A Case Report." Journal of Clinical Research and Reports 8, no. 3 (June 24, 2021): 01–04. http://dx.doi.org/10.31579/2690-1919/178.

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Urinary calculi are the third most common affliction of the urinary tract only exceeded by urinary tract infections and pathologies of the prostate gland. Urinary tract calculi contribute to a major concern encountered in the practice of urology, it affects about 10-12% of the population with a variable incidence with respect to sex, age, occupation, geographical area, climate, dietary fluid intake, social class and race. Urethral calculus is always found on the site of prostatic urethra, bulbar and fossa navicularis. Primary urethral calculi are usually associated with urethral strictures, posterior urethral valve and a diverticulum. Urethral calculi represent 1-2% of all calculi in the urinary tract. This is a case of a 32-year-old farmer and fisherman who had a retrograde urethrocystography (RUCG) that showed an obstructive prostatic calculus, bladder wall calcification and thickening with contrast refluxing into the seminal vesicles bilaterally.

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Farsi, Hasan Mohammed Ali, Hisham Ahmed Mosli, Mohammed Alzimaity, Ahmed A. Bahnassy, and Mohammed A. Ibrahim. "In situ extracorporeal shock wave lithotripsy for primary ureteric calculi." Urology 43, no. 6 (June 1994): 776–81. http://dx.doi.org/10.1016/0090-4295(94)90133-3.

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Barr, J. D., C. J. Tegtmeyer, and A. D. Jenkins. "In situ lithotripsy of ureteral calculi: review of 261 cases." Radiology 174, no. 1 (January 1990): 103–8. http://dx.doi.org/10.1148/radiology.174.1.2294534.

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Serratrice, Jean-François. "Une méthode d'interprétation des essais effectués sur site sur des boulons à ancrage réparti sollicités en traction." Revue Française de Géotechnique, no. 171 (2022): 4. http://dx.doi.org/10.1051/geotech/2022005.

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Les boulons à ancrage réparti sont utilisés dans le domaine des soutènements et des renforcements des sols et des roches. Leur comportement s'étudie au moyen d'essais d'arrachement ou par auscultation de boulons instrumentés. Une méthode d'interprétation de ces différents types d'essais est proposée. Fondée sur un calcul au module de réaction, elle met en jeu un boulon pris individuellement et sollicité dans sa direction axiale. La méthode a été appliquée à l’interprétation d'une dizaine d'essais d'arrachement et de cinq boulons radiaux instrumentés mis en place en tunnel ou dans une paroi clouée, d'après des données issues de la littérature. L'article présente une partie des résultats de cette étude en commençant par un aperçu des travaux de recherche effectués dans ce domaine. La méthode de calcul est ensuite présentée. Les exemples d'interprétation de deux essais d'arrachement sont commentés alors, pour lesquels trois lois de réaction sont mises en œuvre (bilinéaire, exponentielle et trilinéaire). Deux procédures sont proposées pour effectuer le choix de la loi de réaction et l'identification de ses paramètres. La méthode a été appliquée ensuite à un boulon radial instrumenté mis en place en tunnel.

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Stiegmann, Gregory V. "Bile Duct Calculi – The New Challenges." HPB Surgery 10, no. 6 (January 1, 1998): 409–10. http://dx.doi.org/10.1155/1998/16548.

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Background: Morbidity and mortality after surgical treatment of bileduct stones increase with age and associated diseases. A proposed alternative therapy is endoscopic sphincterotomy (ES) with the gallbladder left in situ, and we elected to compare this option with standard open surgery in high-risk patients.Methods: 98 patients (mean age 80 years) with symptoms likely to be due to bileduct stones or a recent episode of biliary parcreatitis were randomised to be treated either by open cholecystectomy with operative cholangiography and (if necessary) bileduct exploration (n=48) or by endoscopic sphincterotomy alone (n=50).Findings: The procedure was accomplished successfully in 94% of the surgery group and 88% of the ES group, and there were no significant differences in immediate morbidity (23% vs 16%) or mortality (4% vs 6%). During mean follow-up of 17 months biliary symptoms recurred in three surgical patients, none of whom underwent repeat surgery, and in 10 ES patients, seven of whom had biliary surgery. By multivariate regression analysis endoscopic sphincterotomy was an independent predictor of recurrent biliary symptoms (odds ratio 6.9; 95% C11.46 to 32.54).Interpretation: In elderly or high-risk patients, surgery is preferably to endoscopic sphincterotomy with the gallbladder left in situ as a definitive treatment for bileduct stones or non-severe biliary pancreatitis.

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ULLAH, AMAN, QURBAN ALI SHAIKH, ABDUL RASHEED SHAIKH, and Malik Hussain Jalbani. "EXTRACORPOREAL SHOCK WAVE LITHOTRIPSY." Professional Medical Journal 15, no. 03 (March 10, 2008): 367–70. http://dx.doi.org/10.29309/tpmj/2008.15.03.2827.

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Objective: To assess efficacy of ESWL as a single modality in upperand lower ureteric calculi. Setting: department of Nephro-Urology Chandka Medical College Hospital, Larkana.Period:January 2003 to April 2006. Methods and materials: 62 patients underwent ESWL. Upper and lower ureteral calculiwere treated by using Dornier MPL-9000 Lithotripter with ultrasound localization. Results: Among 62 cases 56(90.3%)patients had upper ureteric calculi, whereas 06(9.7%) patients had lower ureteric calculi. Size of stones ranged from0.5 mm to 18mm having mean size of 10mm. All patients were followed for period of 6 weeks. Of these 62 patients 58patients were stone free at the end of 2 weeks follow up. In 2 cases stones failed to fragment, where as 2 cases failedto attend out patient department for follow up. Conclusion: This study concluded that in situ echoguided ESWL waseffective modality of treatment for upper and lower ureteric stones. Localization of ureteric stones with ultrasound hasthe advantage of elimination of radiation exposure to the patient and lithotripsy team

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Baresi, A., S. De Cenzo, R. Bonacina, and S. Perego. "Instrumental chemiolysis of uric acid stones in high risk patients." Urologia Journal 62, no. 1_suppl (January 1995): 97–99. http://dx.doi.org/10.1177/039156039506201s26.

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— The Authors report a series of 15 reno-ureteral obstructive uric acid calculi in high risk patients initially treated by percutaneous nephrostomy. After attempting stone dissolution by in-situ alkalinization, they discuss the place of such a method among the various treatments for uric acid stones.

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Kamtane, Smita, and Monali Ghodke. "Sialolithiasis: An unusually large asymptomatic submandibular salivary stone." Serbian Dental Journal 60, no. 1 (2013): 42–47. http://dx.doi.org/10.2298/sgs1301042k.

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Salivary gland calculi account for the most common disease of salivary glands. The majority of sialoliths occur in submandibular gland or its duct and they are a common cause of acute and chronic infections. This case report describes an asymptomatic patient presenting with a large submandibular duct sialolith, the subsequent non surgical management of the patient along with etiology, diagnosis and various treatment modalities available for the treatment of salivary gland calculi depending on their site and size.

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Fallourd, Renaud, Amaury Dehecq, Matthias Jauvin, Yajing Yan, Gabriel Vasile, Michel Gay, Emmanuel Trouvé, and Jean-Marie Nicolas. "Suivi des glaciers de montagne par imagerie radar satellitaire." Revue Française de Photogrammétrie et de Télédétection, no. 219-220 (January 19, 2020): 91–105. http://dx.doi.org/10.52638/rfpt.2019.471.

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Cet article présente un ensemble de résultats obtenus par télédétection radar satellitaire sur le site test Chamonix-Mont Blanc. L'objectif est d'illustrer le potentiel et les limitations de l'imagerie SAR (Synthetic Aperture Radar) pour l'observation des glaciers de montagne en zone tempérée. Après avoir rappelé certaines spécificités de ces glaciers qui conditionnent l'exploitation des données SAR, trois types de mesures sont étudiés : i/ le calcul de champs de déformation par interférométrie différentielle (D-InSAR) avec des données ERS Tandem dont les couples à un jour permettaient de mettre en œuvre cette technique en dehors de la période estivale ; ii/ le calcul de champs de déformation bidimensionnels par corrélation d'amplitude avec des données haute résolution TerraSAR-X (TSX) et la reconstruction du déplacement tridimensionnel à partir de couples acquis sur des orbites ascendantes et descendantes ; iii/ le calcul de la topographie à partir de couples TanDEM-X (TDX) en évaluant les incertitudes liées à la pénétration radar dans la neige et la glace. Enfin, nous illustrons les premiers résultats obtenus avec les données des satellites Sentinel-1 A/B, de plus faible résolution spatiale mais dont la répétitivité à 6 jours et la gratuité ouvrent de nouvelles perspectives. Ces travaux montrent à la fois le fort potentiel de l'imagerie SAR pour observer la dynamique et les variations de volume des glaciers tout en soulignant les facteurs favorables ou limitant pour une exploitation régulière des données issues des satellites radar lancés depuis les années 90.

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Angadi, Sneha, and Vinod Biradar. "Spontaneous non-traumatic common bile duct perforation presented as an acute abdomen: a rare case report." International Surgery Journal 7, no. 8 (July 23, 2020): 2773. http://dx.doi.org/10.18203/2349-2902.isj20203276.

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The spontaneous perforation of the biliary tract (SPBT) is an extremely rare cause of peritonitis, which was first described by Freeland in 1882, to date only around 70 cases have been reported. Here we present a case of spontaneous perforation of the biliary tract, in a patient with choledocholithiasis. A 45 years old male presented to us with acute abdomen with raised amylase and lipase s/o pancreatitis, imaging showed acute on chronic pancreatitis with impacted distal lumen in situ common bile duct (CBD) calculi. Patient was planned for ERCP with CBD clearance after his acute episode subsides. Meanwhile patient developed rigidity, guarding and distension. His second CECT showed a breach in the lower lateral segment in the CBD with gross ascites. Patient was planned for laparotomy, abdominal lavage and T-tube drainage. Patient had a stormy postoperative course. Patient recovered well and was discharged with T-tube clamped and subhepatic drain in situ. Spontaneous perforation of the extrahepatic bile duct is a rare but important presentation of gall stones. Conservative surgery that is decompression of the biliary tree and repair of the leak site over T-tube is the mainstay of treatment in the acute presentation.

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Islam, S., SM Khan, S. Regmi, IA Shameem, GM Chowdhury, and AKMK Alam. "In Situ ESWL and ESWL after Push Back for Upper Ureteric Calculi: A Comparative Study." Bangladesh Journal of Urology 14, no. 2 (February 24, 2020): 51–54. http://dx.doi.org/10.3329/bju.v14i2.45582.

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This prospective study has been done to compare the results of treatment of uncomplicated upper ureteral calculi by in situ ESWL and ESWL after push back. Ninety consecutive patients with single upper- ureteric stones of < 1 cm in size with no distal obstruction were selected and divided into two groups. Fifty patients in group 1 were treated by in situ ESWL while 40 patients in group 2 were treated by push back followed by ESWL. In the in situ ESWL group, 56% cases were cleared of stone otter l week of first session, 24% cases required second and 10% cases required third sessions for complete clearance of stone. Overall 90% clearance was achieved after 90 days in this group. In the ESWL after push back group, 52.5% cases were cleared of stone after- 1 week of first session, 30% cases required second and 10% cases required third sessions for complete clearance of stone. Overall 92.5% clearance was achieved after 90 days in this group. Although more clearance rate was achieved in ESWL after push back, it was not statistically significant (p>0.05). The number of average ESWL sessions required was 1.54 for stone cm and 1.77 /or stone of l crn in the in situ ESWL group, where as it was 1.46 and 1.48 respectively for stones - / cm and of 1 cm respectively in the ESWL after push back group, however this difference was not statistically significant. More shock wave and energy was needed in the in situ ESWL group than in ESWL after push back group. The mean shock wave was 1994 + 449 for in situ ESWL group and 1757.5 ± 255 for 17S117, after push back group, which was statistically very significant (p<0.01). The mean energy used was 5.07 L 0.81 in the in situ ESWL group and 4.6 0.48 in ESWL after push back group and this difference was also statistically significant (p<0.01). Post procedure complications like loin pain, noninvasive nature of ESWL has a strong appeal to the patients and physicians, and has become the first line treatment option for proximal ureteral stones. Although some urologists claim a higher success rate of ESWL after push back procedure, the invasiveness of the additional ureteral manipulation must be considered 6. On the other hand, in situ ESWL for uncomplicated upper ureteric calculi is appealing because it is noninvasive, requires no anesthesia, low morbidity, low cost and can be performed as an outpatient therapy and offers acceptable results. So, this study has been done to compare the results of treatment of uncomplicated upper ureteral calculi by in situ ESWL and ESWL after push back. Bangladesh Journal of Urology, Vol. 14, No. 2, July 2011 p.51-54

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Le Moine, Manuel, Jean-Bernard Kovarik, and Olivier Piet. "Recommandations pour le calcul aux états-limites des ouvrages en site aquatique." Revue Française de Génie Civil 7, no. 9 (September 2003): 1211–30. http://dx.doi.org/10.1080/12795119.2003.9692542.

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Santiago-Rodriguez, Tasha M., Yvonne Narganes-Storde, Luis Chanlatte-Baik, Gary A. Toranzos, and Raul J. Cano. "Insights of the dental calculi microbiome of pre-Columbian inhabitants from Puerto Rico." PeerJ 5 (May 2, 2017): e3277. http://dx.doi.org/10.7717/peerj.3277.

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Background The study of ancient microorganisms in mineralized dental plaque or calculi is providing insights into microbial evolution, as well as lifestyles and disease states of extinct cultures; yet, little is still known about the oral microbial community structure and function of pre-Columbian Caribbean cultures. In the present study, we investigated the dental calculi microbiome and predicted function of one of these cultures, known as the Saladoid. The Saladoids were horticulturalists that emphasized root-crop production. Fruits, as well as small marine and terrestrial animals were also part of the Saladoid diet. Methods Dental calculi samples were recovered from the archaeological site of Sorcé, in the municipal island of Vieques, Puerto Rico, characterized using 16S rRNA gene high-throughput sequencing, and compared to the microbiome of previously characterized coprolites of the same culture, as well modern plaque, saliva and stool microbiomes available from the Human Microbiome Project. Results Actinobacteria, Proteobacteria and Firmicutes comprised the majority of the Saladoid dental calculi microbiome. The Saladoid dental calculi microbiome was distinct when compared to those of modern saliva and dental plaque, but showed the presence of common inhabitants of modern oral cavities including Streptococcus sp., Veillonella dispar and Rothia mucilaginosa. Cell motility, signal transduction and biosynthesis of other secondary metabolites may be unique features of the Saladoid microbiome. Discussion Results suggest that the Saladoid dental calculi microbiome structure and function may possibly reflect a horticulturalist lifestyle and distinct dietary habits. Results also open the opportunity to further elucidate oral disease states in extinct Caribbean cultures and extinct indigenous cultures with similar lifestyles.

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Rassweiler, J., K. Lutz, R. Gumpinger, and F. Eisenberger. "Efficacy of in situ Extracorporeal Shock Wave Lithotripsy for Upper Ureteral Calculi." European Urology 12, no. 6 (1986): 377–86. http://dx.doi.org/10.1159/000472662.

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Hollenbeck, Brent K., Timothy G. Schuster, Gary J. Faerber, and J. Stuart Wolf. "Flexible ureteroscopy in conjunction with in situ lithotripsy for lower pole calculi." Urology 58, no. 6 (December 2001): 859–62. http://dx.doi.org/10.1016/s0090-4295(01)01500-x.

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Al Busaidy, S. S., A. R. Prem, M. Medhat, D. Giriraj, P. Gopakumar, and H. S. Bhat. "Paediatric Ureteric Calculi: Efficacy of Primary In Situ Extracorporeal Shock Wave Lithotripsy." Journal of Urology 162, no. 2 (August 1999): 634–35. http://dx.doi.org/10.1016/s0022-5347(05)68664-8.

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Clayman, Ralph V. "Flexible Ureteroscopy in Conjunction With In Situ Lithotripsy for Lower Pole Calculi." Journal of Urology 168, no. 2 (August 2002): 874. http://dx.doi.org/10.1016/s0022-5347(05)64797-0.

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AL Busaidy, Prem, Medhat, Giriraj, Gopakumar, and Bhat. "Paediatric ureteric calculi: efficacy of primary in situ extracorporeal shock wave lithotripsy." BJU International 82, no. 1 (July 1998): 90–96. http://dx.doi.org/10.1046/j.1464-410x.1998.00686.x.

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de la Hunt, M. N. "Paediatric ureteric calculi: Efficacy of primary in situ extracorporeal shock wave lithotripsy." Journal of Pediatric Surgery 34, no. 6 (June 1999): 1049. http://dx.doi.org/10.1016/s0022-3468(99)90818-7.

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El-Barky, Ehab, Yusuf Ali, Mohammed Sahsah, Ali A. Terra, and Elijah O. Kehinde. "Site of impaction of ureteric calculi requiring surgical intervention." Urolithiasis 42, no. 1 (September 22, 2013): 67–73. http://dx.doi.org/10.1007/s00240-013-0605-4.

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Le Moine, Manuel, Jean-Bernard Kovarik, and Olivier Piet. "Recommandations pour le calcul aux étatslimites des ouvrages en site aquatique. ROSA 2000." Revue française de génie civil 7, no. 9 (October 28, 2003): 1211–30. http://dx.doi.org/10.3166/rfgc.7.1211-1230.

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Farrands, R., B. W. Turney, and P. V. S. Kumar. "Factors Predicting the Success of Extracorporeal Shock Wave Lithotripsy in the Treatment of Ureteric Calculi." British Journal of Medical and Surgical Urology 4, no. 6 (November 2011): 243–47. http://dx.doi.org/10.1016/j.bjmsu.2011.06.001.

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Objective: To evaluate the success of extracorporeal shock wave lithotripsy (ESWL) in the treatment of ureteric calculi and determine the factors which influence outcome. Patients and methods: A retrospective audit of patients with a single ureteric stone receiving ESWL was performed. Success was defined as complete stone clearance on post-treatment imaging. Patient demographics and stone characteristics were correlated to ESWL outcome. Results: 108 patients met the inclusion criteria for this study. The mean age of the patients was 52.5 years (range 24–89 years). 80% (86/108) of patients were male. Stone sizes varied from 4 to 19 mm (mean 7.92 mm). The overall ESWL success rate for ureteric stones was 79%. Treatment was more effective for smaller ( p = 0.003) and more located stones ( p = 0.035). Stone size correlated with number of treatments required ( p =0.005). A JJ stent in situ at the time of ESWL reduced the success rate ( p = 0.002). Conclusions: Stone size, site in the ureter, and the presence of a JJ stent were predictors of ESWL success. Our study from a District General Hospital in the UK demonstrates that ESWL may be used with high efficacy to treat ureteric stones.

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Mukesh Chande and Jaydeep M Gadhavi. "Evaluation of the Management of Urolithiasis with Clinical Study." Academia Journal of Surgery 3, no. 1 (May 27, 2020): 107–9. http://dx.doi.org/10.47008/ajs/2020.3.1.23.

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Background: Urolithiasis encompasses both renal and ureteric stones. It is estimated that up to 5% of the world population is affected by this disease and the lifetime risk of getting urinary stone is 8-15%. The aim of this study is to look for epidemiological patterns in the disease distribution, understand the causative factors of the disease and assess the existing surgical modalities of treatment of this disease. Subjects and Methods: In the present study 68 cases of Urolithiasis fulfilling the study parameters were admitted and subsequently operated in Medical College and Research Hospital. Results: 65% of the patients were between age group 18-40. The most common site of urinary calculus was lower 1/3ureter followed by lower pole kidney. Diet, fluid intake, diabetes and obesity were significant predisposing factors for urolithiasis. PCNL was the treatment of choice for renal calculus while ECSWL was treatment of choice in upper ureteric calculi and ureteroscopy for lower ureteric calculi. Conclusion: For renal calculi, PCNL is the best treatment modality as of now, but it is associated with greater post-operative morbidity. For stone less than 1cm size, ECSWL is a good alternative to PCNL, but has poor clearance rate and thus greater need for auxiliary procedure. For ureteric calculi, both ECSWL and ureteroscopy have given good results but ECSWL is better tolerated by the patients.

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Ali, Qutubuddin, Shehtaj Khan, Gambhir Patel, Kritik Jaiswal, and Krishnanand . "Medical expulsive therapy: a cost effective evidence-based definitive treatment for ureteric stones." International Surgery Journal 7, no. 9 (August 27, 2020): 2879. http://dx.doi.org/10.18203/2349-2902.isj20203508.

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Background: The lifetime risk of kidney stones is between 5% and 10% and rates of recurrence are as high as 50%. Majority of the ureteric stones (70%) are found in the lower third of the ureter. Available setup, type, size of the stone, and expertise of the surgeon are the major factors affecting the treatment modality. Medical expulsive therapy has shown promising results in previous studies. Aim of the study was to assess the efficacy of tamsulosin and deflazacort combination therapy for stone expulsion in relation with site and size of stones.Methods: A total of 97 patients with ureteric calculi of size 10 mm or less attending the urology out-patient department were included. Received medical expulsive therapy using tamsulosin (0.4 mg) and deflazacort (30 mg) for 7 days. Patients were evaluated for stone expulsion on 7th day by non-contrast computed tomography of kidney ureter bladder. Site, side and size of stones were noted.Results: Ureteric calculi was more prevalent in the age group of 21-30 years 38 (39.2%). Male preponderance was observed (76.28%) with male female ratio being 3.2:1. Lower site 64 (65.97%) ureteric calculi were most common. The majority had a stone size of 4-6 mm (42%). Stones were expelled on 7th day in 69 (71.13%) patients. Expulsion rates were highest for the stone size of 2-4 mm (94.4%) followed by 4-6 mm (88.1%). The highest expulsion rates were observed for Lower ureteric stones (84.4%).Conclusions: Medical expulsive therapy using tamsulosin and deflazacort is an effective treatment modality for the management of ureteric stones, especially those present in lower ureter and those ≤8 mm in size.

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Bhawani, Shafqat Shabir, Majid Jehangir, Mohammad Masood, Sajjad Ahmad Dar, and Sajad Nazir Syed. "Dual-Energy Multidetector Computed Tomography: A Highly Accurate Non-Invasive Tool for in Vivo Determination of Chemical Composition of Renal Calculi." Galician Medical Journal 28, no. 3 (September 1, 2021): E202134. http://dx.doi.org/10.21802/gmj.2021.3.4.

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Introduction. Computed tomography is more accurate than excretory urography in evaluation of renal stones due to its high sensitivity and temporal resolution; it permits sub-millimetric evaluation of the size and site of calculi but cannot evaluate their chemical composition. Dual-energy computed tomography allows evaluating the chemical composition of urinary calculi using simultaneous image acquisition at two different energy levels. The objective of the research was to determine renal stone composition using dual-energy multidetector computed tomography, and its correlation with post-extraction chemical analysis of stones. Materials and Methods. This prospective study was conducted in the Department of Radiodiagnosis and Imaging from September 2017 to March 2019. A total of 50 patients with urolithiasis at the age of 18-70 years were included in the study. Dual-energy computed tomography ratios of various stones were noted, and preoperative composition of calculi was given based on their colour and dual-energy computed tomography ratio. These results were compared with the post-extraction chemical analysis of stones (using Fourier infrared transform spectroscopy as the standard comparative method.) Results. The most common type of calculi in our study population was calcium oxalate stones (78%) followed by uric acid stones (12%), cystine stones (6%) and hydroxyapatite stones (4%). The dual-energy ratio of calcium oxalate, uric acid, cystine and hydroxyapatite stones ranged from 1.38-1.59, 0.94-1.08, and 1.20-1.28 and 1.52-1.57, respectively, with the mean dual-energy ratio of 1.43, 1.01, 1.25 and 1.55, respectively. Dual-energy computed tomography was found to be 100% sensitive and specific for differentiating uric acid stones from non‑uric acid stones. The sensitivity and specificity in differentiating calcium oxalate calculus from non‑calcium oxalate calculus was 97.5% and 90.9%, respectively, with 96% accuracy and kappa value of 0.883 suggesting strong agreement. Conclusions. Dual-energy computed tomography is highly sensitive and accurate in distinguishing between various types of renal calculi. It has vital role in management as uric acid calculi are amenable to drug treatment, while most of non-uric acid calculi require surgical intervention.

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Tu, Nguyen Huu, Kenji Inoue, Parker K. Lewis, Ammar Khan, Jun Hyeong Hwang, Varun Chokshi, Branka Brukner Dabovic, et al. "Calcitonin Related Polypeptide Alpha Mediates Oral Cancer Pain." Cells 12, no. 13 (June 21, 2023): 1675. http://dx.doi.org/10.3390/cells12131675.

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Oral cancer patients suffer pain at the site of the cancer. Calcitonin gene related polypeptide (CGRP), a neuropeptide expressed by a subset of primary afferent neurons, promotes oral cancer growth. CGRP also mediates trigeminal pain (migraine) and neurogenic inflammation. The contribution of CGRP to oral cancer pain is investigated in the present study. The findings demonstrate that CGRP-immunoreactive (-ir) neurons and neurites innervate orthotopic oral cancer xenograft tumors in mice. Cancer increases anterograde transport of CGRP in axons innervating the tumor, supporting neurogenic secretion as the source of CGRP in the oral cancer microenvironment. CGRP antagonism reverses oral cancer nociception in preclinical oral cancer pain models. Single-cell RNA-sequencing is used to identify cell types in the cancer microenvironment expressing the CGRP receptor components, receptor activity modifying protein 1 Ramp1 and calcitonin receptor like receptor (CLR, encoded by Calcrl). Ramp1 and Calcrl transcripts are detected in cells expressing marker genes for Schwann cells, endothelial cells, fibroblasts and immune cells. Ramp1 and Calcrl transcripts are more frequently detected in cells expressing fibroblast and immune cell markers. This work identifies CGRP as mediator of oral cancer pain and suggests the antagonism of CGRP to alleviate oral cancer pain.

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THORNHILL, J. A., K. MORAN, S. SHEEHAN, J. SMITH, and J. M. FITZPATRICK. "Minimisation of Stone Deflection during Extracorporeal Shockwave Lithotripsy Monotherapy for Ureteric Calculi in situ." British Journal of Urology 66, no. 4 (October 1990): 438–39. http://dx.doi.org/10.1111/j.1464-410x.1990.tb14978.x.

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Rauchenwald, Michael, Thomas Colombo, Peter H. Petritsch, Peter Vilits, and Gerd Hubmer. "In Situ Extracorporeal Shock Wave Lithotripsy of Ureteral Calculi with the MPL-9000X Lithotriptor." Journal of Urology 148, no. 3 Part 2 (September 1992): 1097–101. http://dx.doi.org/10.1016/s0022-5347(17)36830-1.

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Schuster, Timothy G., Brent K. Hollenbeck, Gary J. Faerber, and J. Stuart Wolf. "Ureteroscopic Treatment of Lower Pole Calculi: Comparison of Lithotripsy In Situ and After Displacement." Journal of Urology 168, no. 1 (July 2002): 43–45. http://dx.doi.org/10.1016/s0022-5347(05)64828-8.

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Tham, Tony CK, Jo Vandervoort, Richard CK Wong, and David L. Carr-Locke. "Endoscopic sphincterotomy with gallbladder Left in situ versus open surgery for common bileduct calculi." Lancet 348, no. 9022 (July 1996): 264. http://dx.doi.org/10.1016/s0140-6736(05)65568-7.

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Yarze, Joseph Carl, Kevin J. Herlihy, Anna M. Poulos, and Howard P. Fritz. "Endoscopic sphincterotomy with gallbladder Left in situ versus open surgery for common bileduct calculi." Lancet 348, no. 9022 (July 1996): 264–65. http://dx.doi.org/10.1016/s0140-6736(05)65569-9.

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Peacock, Janet L. "Endoscopic sphincterotomy with gallbladder Left in situ versus open surgery for common bileduct calculi." Lancet 348, no. 9022 (July 1996): 265. http://dx.doi.org/10.1016/s0140-6736(05)65570-5.

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Targarona, Eduard M., Rose M. Perez Ayuso, Emili Ros, Josep Teres, and Manel Trias. "Endoscopic sphincterotomy with gallbladder Left in situ versus open surgery for common bileduct calculi." Lancet 348, no. 9022 (July 1996): 265–66. http://dx.doi.org/10.1016/s0140-6736(05)65571-7.

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Baguelin, François. "Écrouir le fluage des sols mous par préchargement." Revue Française de Géotechnique, no. 173 (2022): 4. http://dx.doi.org/10.1051/geotech/2023002.

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Dans le cas de construction d’un remblai sur un site de sols mous, le préchargement est souvent utilisé, conjointement avec des drains verticaux, pour réduire, d’une part, le délai de construction et, d’autre part, l’amplitude du tassement en service. Une méthode de calcul de l’écrouissage du fluage est présentée dans ces conditions sur la base du modèle de fluage de Bjerrum (1967 : Engineering geology of Norvegian normally-consolidated marine clays as related to settlements of buildings. Géotechnique 17: 81–118). On illustre son application sur le chantier des parkings du magasin IKEA à Bayonne, avec sa confrontation aux mesures de tassement sur un an.

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Acevedo Barrios, Rosa. "Diagnóstico preeliminar ambiental de playas de Cartagena de Indias, Caribe colombiano." Teknos revista científica 17, no. 1 (July 30, 2017): 38. http://dx.doi.org/10.25044/25392190.891.

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El establecimiento de un sistema de alerta temprana de contaminación en las playas tiene un efecto muy importante en la protección de la calidad de las playas. En este estudio, se evaluó la calidad ambiental de las playas del sector turístico de Cartagena de Indias mediante la caracterización de parámetros fisicoquímicos in situ (temperatura, pH, salinidad, conductividad y oxígeno disuelto) y ex situ (nitritos, nitratos, fosfatos, sólidos totales, DBO, Coliformes totales, fecales, metales pesados e hidrocarburos totales) y de bacterias indicadores; además, se calculó índice de calidad ambiental (ICAM ) para identificar puntos críticos y las zonas de mayor vulnerabilidad de playas. Los resultados de este estudio PPF contribuyen con la evaluación de la calidad ambiental de las playas de Cartagena de Indias, aportando bases y recomendaciones conducentes a la gestión integral de estos ecosistemas estratégicos.

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Jagannath, Kailash, Ashwin Kanakaraja Gupta, and Narayanaswamy Srinivasan. "A study on ureteric calculi in a rural tertiary care centre." International Surgery Journal 6, no. 4 (March 26, 2019): 1312. http://dx.doi.org/10.18203/2349-2902.isj20191268.

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Background: Urolithiasis is one of the most common afflictions of genito-urinary tract affecting almost 5-15% of the world population. Nearly 50% of patients affected will have recurrence within 5 years, making it a lifetime disease. This study was undertaken to know the clinical epidemiology and to evaluate different management modalities with immediate postoperative outcomes of ureteric calculi.Methods: This was a descriptive prospective observational study done at PES Institute of Medical Sciences and Research, Kuppam for a period of 2 years. A set of inclusion and exclusion criteria were defined and followed. Initial assessment, basic investigations with specific investigations for ureteric calculi confirmation were done. Relevant operative procedure was done and patients were managed post operatively.Results: The most common age group affected was between 31-50 years with male predominance in our study. Pain abdomen was the presenting complaints seen in all the patients. Lower 1/3rd of ureter was the commonly involved site. URSL (ureteroscopic lithotripsy) was the choice of treatment for ureteric and vesico-ureteric junction calculi and PCNL/PBPCNL (percutaneous nephrolithostomy/push back percutaneous nephrolithostomy) was the treatment of choice for calculi at pelvi-ureteric junction and upper 1/3rd of ureter with size >1 cm. The success rate of the surgical procedures done in our study was 80-100%.Conclusions: Increasing prevalence of calculi in younger age group and in female population may be due to westernization, modern lifestyle and change in dietary habits. Having the knowledge of newer techniques will help surgeons to individualise the treatment which will improve success rate and reduce morbidity.

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Regmi, Sunil, Sunil Chandra Adhikari, Rabin Raj Singh, Rabi Bastakoti, and Saroj Yadav. "In Situ Extracorporeal Shock Wave Lithotripsy (ESWL) and ESWL after Push Back For Upper Ureteric Calculi: A Comparative Study." Journal of Nobel Medical College 6, no. 1 (August 22, 2017): 72–76. http://dx.doi.org/10.3126/jonmc.v6i1.18090.

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Abstract:

Background: ESWL is one of the most important modality for the treatment of urolithiasis. In situ ESWL is a non-invasive and safe procedure for renal and upper ureteric stones in selected cases & can be performed on outpatient basis. However, some urologists claim a higher success rate of ESWL after push back procedures for upper ureteric calculi.Materials & Methods: This prospective study was done to compare the results of treatment of upper ureteral calculi by in situ ESWL and ESWL after push back. 90 consenting patients with single upper ureteric stones of ≤ 1 cm in size with no distal obstruction were selected and divided into two groups. 50 patients in group 1 were treated by in situ ESWL while 40 patients in group 2 were treated by push back followed by ESWL.Results: Better clearance was achieved with ESWL after push back (92.5% clearance after 90 days) than with in situ ESWL (90% clearance after 90 days) but it was not statistically significant (p>0.05). The mean shock wave was 1994 ± 449 for in situ ESWL group and 1757.5 ± 255 for ESWL after push back group, which was statistically very significant (p<0.01). The mean energy used was 5.07 ± 0.81 in the in situ ESWL group and 4.6 ± 0.48 in ESWL after push back group and this difference was also statistically significant (p<0.01). Post procedure complications like loin pain, hematuria, lower urinary tract symptoms (LUTS) and fever were more common in ESWL after push back group than in the in situ ESWL group and the differences were statistically significant.Conclusion: In situ ESWL is a better option than ESWL after push back for the management of upper ureteric stones in selected group of patients. Journal of Nobel Medical CollegeVolume 6, Number 1, Issue 10 (January-June, 2017), page: 72-76

Journal articles on the topic 'Calcul in situ'

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