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Open Journal of Orthopedics 2024年第9期14卷 404-410页

作者： tafsir camara Amira Aboud Ibrahima Sory Bangoura Madjirabe Nassaradengar Hippolyte Mohamed Youla Urbain Judicael Adou Kouassi Bah Mohamed Lamine Léopold Lamah Orthopedics-Traumatology Department of Ignace Deen University Hospital Conakry Guinea Orthopedics-Traumatology Department of Donka University Hospital Conakry Guinea

Introduction: Mechanical complications after osteosynthesis are spontaneous and harmful modifications of the joint compromising the consolidation process. The aim of this study is to report on the frequency of these complications and their management in the Orthopaedic-Traumatology Department of CHU Ignace Deen. Patients and Methods: we conducted a retrospective descriptive and analytical cross-sectional study from January 2017 to December 2022. It focused on the records of patients hospitalized and treated in the department for a mechanical complication after osteosynthesis. Results: The frequency of mechanical complications was 1.2%, with an average age of 44.2 years and a sex ratio of 3.2 in favor of men. Non-compliance with postoperative instructions, non-compliance with surgical technique, postoperative infection and early loading were the main contributing factors. Disassembly of the screw-plate was the most common cause in 6 cases (35.5%), with a mean delay of 4.1 months. Revision osteosynthesis was carried out using screw plates in 8 cases (47.1%). Conclusion: Mechanical complications of osteosynthesis are less frequent traumatic conditions in our department. Several factors contribute to their occurrence.

关键词： Mechanical Complications Frequency Therapeutics Osteosynthesis

Open Fractures of Limbs by the Bite of Domestic Donkeys: An Unusual Aetiology

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Open Journal of Orthopedics 2022年第12期12卷 485-492页

作者： Mohamed Sidibé Mohamed Lamine Bah Fodé Mahamoud Sylla tafsir camara Serge Ntungwanayo Orthopedic-Traumatology Department of the Tambacounda Regional Hospital Tambacounda Senegal Orthopedic-Traumatology Department of the Ignace Deen National Hospital in the Republic of Guinea Conakry Guinea

Introduction: The aim of this study is to describe the epidemiological, lesional, therapeutic and evolutionary profile of open fractures of limbs by bites of domestic donkeys. Patients and Methods: This is a prospective descriptive study over 28 months made in the Orthopedics-Traumatology department of the Tambacounda Regional Hospital in Senegal, concerning patients bitten by donkeys, resulting in an open fracture of the thoracic and pelvic limbs. Results: Twelve male patients were included. The average age was 10.50 years ± 2.60. The most common circumstance was the bite when two donkeys were separated. The thoracic limbs were the most affected by the occurrence of the arm. Cauchoix-Duparc type II and AO A2 and B2 were predominant. The essential trimming/osteosynthesis was carried out within 24 hours of the bite. Serovaccination was systematic, but on the other hand, a single dose of anti-rabies serum was administered. Pinning was the most commonly used bone synthesis. Complications were mainly infectious, followed by a case of radial nerve palsy and non-union on pins. Conclusion: The typical profile of an open donkey bite fracture is a male child/adolescent who is bitten during the separation of two fighting donkeys. The lesions are most often found in the thoracic limbs with a predominance of Cauchoix-Duparc type II and type A2 and B2 fractures of the AO, whose treatment consisted of trimming and pinning. The infectious complications of the soft tissues marked the evolution.

关键词： Open Fractures Limbs Bite Donkeys

Familial Lateral Sclerosis with Juvenile Onset: About 3 Cases and Review of the Literature

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Journal of Biosciences and Medicines 2023年第10期11卷 55-62页

作者： camara Mamady Barry Souleymane Djigué Dore Male Toure Mohamed Lamine Diallo Mohamed tafsir Toure Laïla Youla Seny Konate Ibrahimasory Barry Louceny Fatoumata camara Mohamed Salif camara Idrissa Doumbouya Idrissa Djibo Hamani Bachir Conde Mohamed Lamine Cisse Fodé Abass Department of Neurology Ignace Deen National Hospital Conakry University Hospital Conakry Guinea

Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disease deadly. In Africa, little data exists on this condition and the form familial is the most common with a younger age of onset. Our observations relate to three brothers, born from a consanguineous marriage. The diagnosis of amyotrophic lateral sclerosis was certain placed in all patients according to the criteria of Awaji. The average age of patients was 16.66 years, and the average age of onset of symptoms was 10.33 years old. The female gender was the most represented with a sex ratio of 0.5. Our patients benefited from rilusole, vitamin D and physiotherapy. A only patient presented with dysphagia. However, no cases have been observed at this day.

关键词： ALS Familial Juvenile

Study and Optimization of a Photovoltaic Mill System Functioning on the Course of the Sun

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Energy and Power Engineering 2017年第4期9卷 260-272页

作者： tafsir Abdoulaye Gaye Biram Dieng Senghane Mbodji Ousmane Sow Grégoire Sissoko Department of Physics UFR Applied Sciences and Information and Communication Technologies Alioune Diop University of Bambey Bambey Senegal Universitary Institute of Technology University of Thies Thies Senegal Department of Physics Faculty of Science and Technology Cheikh Anta Diop University of Dakar Dakar Senegal

This paper dealt with the optimization of the performance of a photovoltaic mill system operating on the sun race. Depending on the characteristics of the powered load which is a DC motor driving a grain mill and on the weather conditions (temperature and illumination), we noted a very big difference between the potential maximum power and that actually transferred to the load. In order to improve the overall efficiency of the system, we use an adaptation circuit consisting of a boost converter controlled by a numerical MPPT (Maximum Power Point Tracking) command. With the Perturb & Observe (P & O) algorithm, the MPPT control measure the photocurrent, the photo tension and the power released by the photovoltaic generator. From this result, the MPPT control adjusts the duty cyclic of the converter to bring the system to the optimum operating point. Hence, using MATLAB/Simulink software, we did the modeling and the simulation of the system which is composed by a PV generator, a boost converter, a Pulse Width Modulation and a DC motor.

关键词： PV Generator Boost Converter PWM Signal MPPT Control Perturbation & Observation DC Motor Mill