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Surgical Myocardial Revascularization in a Sub-Saharan African Country: Indications and Results

World Journal of Cardiovascular Surgery 2021年第11期11卷 95-103页

作者： kouassi Antonin Souaga Gnamien Randolph Niava Eric Koutoua Katché Kwadjau Anderson Amani Yoboua Aimé Kirioua-Kamenan Jean Calaire Degré Arnau Ekou Aka Roland N’guetta Joseph Kouamé Landry Kohou-Koné Yapo Paul Yapo kouassi Flavien Kendja kouassi michel kangah Cardiovascular Surgery Department of the Abidjan Heart Institute Abidjan C&#244te d’Ivoire Hemodynamics Department of the Abidjan Heart Institute Abidjan C&#244te d’Ivoire Anesthesia and Intensive Care Department of the Abidjan Heart Institute Abidjan C&#244te d’Ivoire

Introduction: Despite the advances of interventional catheterization, surgery remains the treatment of choice for some coronary lesions. Objective: To report the indications and results of surgical revascularization of the myocardium at the Abidjan Heart Institute. Patient and Methods: This is a retrospective study of patients with coronary insufficiency who underwent surgical myocardial revascularization between March 2014 and May 2020 in the Cardiovascular Surgery Department of the Abidjan Heart Institute. There were 17 patients, 11 of whom were men (64.7%) and 6 women (35.3%), The mean age of the patients was 57.5 years ± 8.8. All patients were symptomatic with disabling angina in class III of the Canadian Cardiac Society (CCS). This sym- ptomatology had been evolving on average for 5 years and 6 patients had a history of acute coronary syndrome, 2 of whom had undergone prior angioplasty. Coronary angiography revealed mono-truncated (17.6%), bi-truncated (23.5%) and tri-truncated (58.8%) lesions. Results: The patients were operated under cardiopulmonary bypass (CPB) 15 cases (88.2%) and off pump in 2 cases (11.8%). They underwent a single bypass in 23.5% of cases, a double bypass in 47.1% of cases and a triple bypass in 29.4% of cases. We observed 3 cases of complications (17.6%), namely transient acute renal failure, mediastinitis and postoperative bleeding. The operative and hospital mortality was nil. After a mean follow-up of 3 ± 1.8 years, all patients were

关键词： Myocardial Revascularization Coronary Surgery Bypass

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Surface Water Sediments Characterization Using Metallic Trace Elements (MTEs): Case of the Artisanal Gold Mining Sites of Kokumbo (Côte d’Ivoire)

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Journal of Environmental Protection 2020年第9期11卷 649-663页

作者： kouassi Ernest Ahoussi Armand Patrick Yapo Amani michel kouassi Yao Blaise Koffi Training and Research Unit of Earth Sciences and Mining Resources (Laboratory of Soil Water and Geomaterial Sciences) Universiyé Félix Houphou&euml t Boigny Cocody Abidjan C&ocirc te d’Ivoire Department of Earth Sciences and Mining Resources Institute National Polytechnique Félix Houphou&euml t Boigny (INP-HB) Yamoussoukro C&ocirc te d’Ivoire

The main purpose of this study is to characterize the surface sediments of the Kokumbo artisanal gold mining sites in Metallic trace Elements (MTEs). A total of 12 samples of surface water sediments were collected for this study. The samples were analyzed using the Atomic Absorption Spectrophotometer (AAS). The mean concentrations of Mn (611.37 mg/kg) and Zn (955.86 mg/kg) in the sediments were very high compared to the standard in unpolluted sediments. The enrichment factor (EF) shows that there is an enrichment of Mn at some sites (EF (Mn) > 2). The presence of As, Mn, and Zn is also highlighted by the geo-accumulation index (I-geo) which shows slight pollution in Mn (0 3). This study shows that the presence of Zn in the sediments is linked to artisanal gold mining activities. Indeed, Zn is much used for gold recovery. The statistical analysis (PCA) shows, on the one hand, natural mineralization of the sediments and addition of metals linked to anthropic activities corresponding to the erosion of mining discharges. The surface sediments of the Kokumbo mining sites show pollution in As, Mn, and Zn.

关键词： Artisanal Mining Enrichment Factor (EF) MTEs Pollution Sediment

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Use of the Inverse Slope Method for the Characterization of Geometry of Basement Aquifers: Case of the Department of Bouna (Ivory Coast)

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Journal of Geoscience and Environment Protection 2019年第6期7卷 166-183页

作者： Rock Armand michel Bouadou Kouamé Auguste kouassi Francis Williams kouassi Adama Coulibaly Théophile Gnagne Laboratory of Geosciences and Environment UFR of Sciences and Management of the EnvironmentUniversity of Nangui AbrogouaAbidjanIvory Coast Department of Science and Technology of Water and Environmental En-gineering UFR of Earth Sciences and Mineral ResourcesUniversity of Félix Houphouet-BoignyAbidjanIvory Coast

The inverse slope method (ISM) was used to interpret electric sounding data to determine the geoelectric parameters of the alteration zones (continuous media) and rocky environments (discontinuous environments) of the Bouna Department. Having both qualitative and quantitative interpretation, the inverse slope method (ISM) has the ability to determine the different geoelectric layers while characterizing their resistivities and true thicknesses. In the Bouna department, this method allowed us to count a maximum of four (4) geoelectric layers with a total thickness ranging from 12.99 m to 24.66 m. The alteration thicknesses calculated by the ISM in comparison with those measured in the boreholes showed a linear agreement of the coefficient of determination R2 = 0.8269 with the support of the Nash criterion which showed that this method gave thicknesses of alteration close to 76.76% of that obtained during the drillings.

关键词： Inverse Slope Electric Sounding Geometry of Aquifers Bouna Ivory Coast

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Sedimentary Inputs and Morphology Characterization of the Bottom Agropastoral Lake of Nafoun (North Ivory Coast)

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Journal of Water Resource and Protection 2020年第5期12卷 389-400页

作者： Anzoumanan Kamagate Yao Blaise Koffi kouassi Ernest Ahoussi michel Amani kouassi Hermann Essan Ehui kouassi Serge Aristide Yao Seydou Diallo Training and Research Unit for Earth Sciences and Mining Resources Soil Water and Geomaterials Laboratory Université Félix Houphouet-Boigny Abidjan Ivory Coast Departments of Earth Sciences and Mineral Resources Civil Engineering Geosciences and Geographic Sciences Laboratory Yamoussoukro Ivory Coast Environmental Science and Management Training and Research Unit Laboratory Geosciences and Environment Université Nangui Abrogoua Abidjan Ivory Coast

A bathymetric and sedimentological analysis carried out respectively in July 2017 and April 2018 made it possible to characterize the sediments and the morphology of Lake Nafoun. The sediments of the lake consist of vases, fine to very coarse sands with average particle sizes ranging from 475.67 and 2111 μm. There is a predominance of very coarse elements (43.50%). The standard deviation of the lake sand is between 1.21 and 1.86 and is poorly classified. The skewness fluctuates between ?0.06 and 0.41. The sediments were deposited at the bottom of the lake due to a progressive decline in the flow of water that carried them. Moreover, this study made it possible to realize the first bathymetric chart of Lake Nafoun, 42 years after its impoundment in 1975.

关键词： Sediments Morphology Nafoun Lake Bathymetry

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Sensitivity of Statistical Models for Extremes Rainfall Adjustment Regarding Data Size: Case of Ivory Coast

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Journal of Water Resource and Protection 2021年第8期13卷 654-674页

作者： Relwindé Abdoul-Karim Nassa Amani michel kouassi Makouin Louise Toure National Polytechnic Institute Félix Houphouë t-Boigny (INP-HB) Polytechnic Doctoral School (EDP) Yamoussoukro Ivory Coast National Polytechnic Institute Félix Houphouë t-Boigny (INP-HB) Department of Earth Sciences and Mineral Resources (STeRMi) Laboratory of Civil Engineering Geosciences and Geographical Sciences Yamoussoukro Ivory Coast National Polytechnic Institute Félix Houphouë t-Boigny (INP-HB) Superior School of Mines and Geology (ESMG) Yamoussoukro Ivory Coast

The objective of this study is to analyze the sensitivity of the statistical models regarding the size of samples. The study carried out in Ivory Coast is based on annual maximum daily rainfall data collected from 26 stations. The methodological approach is based on the statistical modeling of maximum daily rainfall. Adjustments were made on several sample sizes and several return periods (2, 5, 10, 20, 50 and 100 years). The main results have shown that the 30 years series (1931-1960;1961-1990;1991-2020) are better adjusted by the Gumbel (26.92% - 53.85%) and Inverse Gamma (26.92% - 46.15%). Concerning the 60-years series (1931-1990;1961-2020), they are better adjusted by the Inverse Gamma (30.77%), Gamma (15.38% - 46.15%) and Gumbel (15.38% - 42.31%). The full chronicle 1931-2020 (90 years) presents a notable supremacy of 50% of Gumbel model over the Gamma (34.62%) and Gamma Inverse (15.38%) model. It is noted that the Gumbel is the most dominant model overall and more particularly in wet periods. The data for periods with normal and dry trends were better fitted by Gamma and Inverse Gamma.

关键词： Sensitivity of Models Sample Size Statistical Models of Extremes Ivory Coast

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Influence of Anthropogenic Activities of Groundwater from Hand Dug Wells within the Precarious Settlements of Southern Abidjan,Cote d’Ivoire:Case of the Slums of Anoumabo(Marcory)and Adjouffou(Port-Bouet)

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Journal of Water Resource and Protection 2013年第4期5卷 427-439页

作者： Isimemen Osemwegie Yei Mairie-Solange Oga kouassi Ernest Ahoussi Yao Blaise Koffi Amani michel kouassi Jean Biemi Technical University of Darmstadt DarmstadtGermany Universite Felix Houphouet-Boigny de Cocody-Abidjan Unite de Formation et de Recherche(UFR)des Sciences de la Terre et des Ressources Minieres(STRM)AbidjanCote d’Ivoire Institut National Polytechnique Felix Houphouet-Boigny(INP-HB) Departement des Sciences de la Terre et des Ressources Minieres(STeRMi)Laboratoire du Genie Civildes Geosciences et des Sciences GeographiquesYamoussoukroYamoussoukroCote d’Ivoire

This study aims to examine the quality and quantity of the groundwater resources from hand-dug wells, within two of these slums—Anoumabo (Marcory) and Adjouffou (Port-Bouet), both located in the southern part of the city. Twenty-eight representative groundwater samples were collected from different domestic wells within the study area. In addition, water samples were collected from the adjoining surface water bodies—the ébrié lagoon and the Atlantic Ocean. The water samples were also tested for microbial indicators of fecal contamination using the conventional membrane filtration method. The groundwater samples are alkaline to acidic with pH ranging between 4.4 and 8.1. They are slightly mineralized with electrical conductivity, EC values ranging between 388 μS/cm and 1494 μS/cm. The dominant hydrochemical facies are Na-Cl, Na-SO4, Ca-Cl and Ca-SO4. Although, majority of the water samples have anions and cations concentrations conforming to the World Health Organization, alerting levels of nitrate contamination was recorded in the area. About 67 percent of the tested samples have nitrate values greater than the recommended WHO limit for drinking water (NO3 > 50 mg/ι). Exceeding high nitrate concentrations in drinking water have been medically proven to be detrimental to infant health. Microbial analyses reveal bacterial contamination at varying degrees in all of the water wells. The presence of these microbial organisms in the samples is also indicative of the presence of some other disease causing pathogens, responsible for sicknesses like cholera, diarrhea, typhoid, etc. The water wells located within Anoumabo have relatively higher levels of groundwater contaminants in comparison to those located within Adjouffou. This is obviously due to the poor well designs and prevalent unhygienic and poor sanitary habits of its inhabitants. These waters though completely unsuitable for drinking and domestic purposes, can be used for irrigation purposes with very little or no

关键词： Anthropogenic Activities Assessment Groundwater Pollution Well

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Surgical Site Infections in Trauma and Orthopaedics at Bouaké Teaching Hospital (Côte d’Ivoire)

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Open Journal of Orthopedics 2024年第9期14卷 381-390页

作者： Loukou Blaise Yao Koffi Léopold Krah Aya Adelaïde Natacha kouassi Kouamé Innocent M’bra Kouamé Jean-Eric kouassi michel Kodo Department of Trauma and Orthopaedics Bouak Teaching Hospital Bouak Cte dIvoire

Background: Surgical site infections are serious healthcare problems. The aim was to describe the epidemiological, diagnostic, therapeutic, and prognostic aspects of surgical site infections in Trauma and Orthopaedics at Bouaké Teaching Hospital. Method: This retrospective, descriptive, and analytical study was conducted from January 2019 to December 31, 2021. The data studied included prevalence, initial lesions, type of surgical intervention, type of SSI, bacteria involved, treatment, and outcomes. Results: Forty-four (11%) of the 399 patients included in the study developed a surgical site infection. The mean age was 27 years, with 36 male and 8 female. Initial lesions were predominantly open fractures (n = 31;70%), with a mean delay of 48 hours for surgical management. Emergency interventions accounted for 70% (n = 31) of cases. The NNISS infection risk score was 1 in 80% (n = 35) of cases. Superficial infections (n = 34;77%) appeared early, on a mean 6 days postoperatively. Bacteriological analysis primarily identified Pseudomonas aeruginosa (n = 10;23%), sensitive to Imipenem and Chloramphenicol but resistant to Amoxicillin-clavulanic acid, Ceftriaxone, Gentamicin, and Ciprofloxacin. Multidrug-resistant bacteria were found in 89% (n = 8) of cases, with all bacteria resistant to Ceftriaxone. Surgical revision was performed in 10 patients (23%), primarily involving debridement with hardware retention (n = 7;70%). Chloramphenicol was the most commonly used antibiotic post-antibiogram (61%). Outcomes were favourable in 98% of cases. Identified risk factors included the type of lesion according to NRC classification, the delay in managing open fractures, and the NNISS score. Conclusion: The prevalence of surgical site infection was 11%, favoured by the delayed operation of open fractures.

关键词： Surgical Site Infection Open Fractures Pseudomonas aeruginosa Ceftriaxone

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Using Optical Tweezers to Study the Friction of the Red Blood Cells

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Advances in Bioscience and Biotechnology 2024年第2期15卷 100-111页

作者： Edoukoua Jean michel Konin Pavel Yale Abadê Ange-Boris N’guessan kouassi Benoit Kouakou Abaka michel Kouacou Eugene Megnassan Département des Sciences et Techniques Université Alassane Ouattara Bouaké C&#244te d’Ivoire Laboratoire d’Instrumentation Image et Spectroscopie (L2IS) Institut National Polytechnique Félix Houphou&#235t-Boigny (INPHB) Yamoussoukro C&#244te d’Ivoire Classes préparatoires aux grandes Ecoles Université de San Pedro San Pedro C&#244te d’Ivoire Laboratoire de Physique Fondamentale et Appliquée Université Nangui Abrogoua (UNA) Abidjan C&#244te d’Ivoire

In the last two decades the study of red blood cell elasticity using optical tweezers has known a rise appearing in the scientific research with regard to the various works carried out. Despite the various work done, no study has been done so far to study the influence of friction on the red blood cell indentation response using optical tweezers. In this study, we have developed a new approach to determine the coefficient of friction as well as the frictional forces of the red blood cell. This approach therefore allowed us to simultaneously carry out the indentation and traction test, which allowed us to extract the interfacial properties of the microbead red blood cell couple, among other things, the friction coefficient. This property would be extremely important to investigate the survival and mechanical features of cells, which will be of great physiological and pathological significance. But taking into account the hypothesis of friction as defined by the isotropic Coulomb law. The experiment performed for this purpose is the Brinell Hardness Test (DB).

关键词： Friction Indentation Optical Tweezers Tribology Red Blood Cells

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Influence of Spatial Distribution on the Regeneration of <i>Piptadeniastrum africanum</i>and <i>Ocotea usambaernsis</i>in Kalikuku, Lubero, North Kivu, Democratic Republic of Congo

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Open Journal of Ecology 2021年第7期11卷 527-539页

作者： Lutumba Suika Achille Kebin Zhang Kambale Muhesi Eloge Christian Jonathan Anona kouassi Mbangilwa Mukombe michel College of Soil and Water Conservation and Desertification Combating Beijing Forestry University Beijing China Institut Supérieur d’Etudes Agronomiques Vétérinaires et Forestières de Butembo Butembo Democratic Republic of Congo Key Laboratory of Sustainable Forest Ecosystem Management Ministry of Education School of Forestry Northeast Forestry University Harbin China

The aim of our study is to highlight the spatial structure of the trees and to determine its influence on the natural regeneration of the Kalikuku dense forest, with a view of its optimal conservation and enhancement. Data collection was done by measuring diameter at breast height along 10 plots of 0.5 ha in size. In analyzing these data, the Dajoz test was used to determine the horizontal spatial distribution pattern of the two most abundant tree species in the forest (Piptadeniastrum africanum and Ocotea usambarensis). The χ2 test was used to compare the frequency distribution of diameter classes for the two species tested. To estimate the difference between the number of seedlings in aggregate versus non-aggregate areas, the Wilcoxon signed-rank test was used. In addition, the equability index was used to test the preponderance of proportions between diameter classes. Finally, the natural regeneration index was evaluated.

关键词： Spatial Distribution Natural Regeneration Seedlings Diameter Class

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Ankle Arthrodesis in the Treatment of Neglected Ankle Fractures

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Open Journal of Orthopedics 2022年第4期12卷 123-130页

作者： M’bra Kouamé Innocent Krah Koffi Leopold kouassi Kouamé Jean-Eric Yao Loukou Blaise Akobé Jean Regis Achie Ochou Pierre Germain Jr Sery Bada Justin Léopold kouassi Aya Adélaïde michel Kodo Traumatology and Orthopedics Surgery of the University Hospital of Bouaké Bouaké C&ocirc te d’Ivoire

Introduction: Neglected ankle fractures are common in our regions. Patients first consult traditional healers and it is when the signs persist that they consult the surgeon for a swollen and painful ankle. Initially we always performed anatomical repairs with osteosynthesis, but the majority of patients still complained of pain and disability. We wondered whether a primary arthrodesis would not be indicated in old ankle fractures to avoid disabling pain for patients. We therefore performed a series of arthrodesis on neglected post-traumatic ankles. The objective of our study was to describe the results of arthrodesis on an old post-traumatic ankle and to propose a therapeutic indication in the face of any neglected ankle fracture. Material and Method: This was a prospective study over 8 years between December 2012 and November 2020, involving 36 cases of neglected ankle fractures treated by arthrodesis using Meary’s technique. We used AOFAS (American Orthopedic Foot and Ankle Score) preoperatively and postoperatively for an objective assessment. Results: The average follow-up was 4.2 years and our results were satisfactory (94.4%) with an average AOFAS score ranging from 27.8 preoperatively to 76.7 postoperatively. The fusion rate was 97.2%. Discussion: Arthrodesis appears here as an important alternative in the treatment of neglected ankle fractures with significant trophic disorders.

关键词： Arthrodesis Ankle Neglected Fracture Osteosynthesis Traditional Healers

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