The Effect Of Culture System On Embryonic Development and Aneuploidy Rate For Icsi Cases

Background: Patients undergoing intracytoplasmic sperm injection (ICSI) or in vitro fertilization (IVF)cycles often suffer from recurrent implantation failure (RIF). To ensure live birth and embryonic viability, culture systems should be optimized in all ICSI and IVF cycles. The success of IVF can be affected by the culture systems employed for embryonic development. It has been argued that covering micro drops with oil in culture systems can prevent microbial infection, ensure suitable osmotic and pH conditions, and prevent the evaporation of the medium. Objectives: Comparing the embryonic development, euploidy rate ,and clinical outcome of using GPS Dishes covered with paraffine oil and SPL Dishes with mineral oil for patients with previous RIF. Patients and methods: the study was a prospective randomized controlled trial and the sample size consisted of 174 patients undergoing ICSI cycles at a private fertility center during the period between April 2017 and March 2020. Patients’ embryos were randomly assigned into one of the two of the aforementioned groups. Results: The two groups weren’t statistically significantly different in male age, female age, collected oocyte number, number of mature oocytes, and number of blastocysts undergoing preimplantation genetic diagnosis (PGD-A). For the preimplantation parameters of the embryos, fertilization, cleavage, and high-quality blastocyst rates were statistically significantly higher in the GPS Dishes with paraffin oil group than in the SPL Dishes covered with mineral oil group (77.5, 80.1, and 79.45%) (p = 0.012, and 0.001). Conclusion: we conclude that embryonic development can be enhanced by using GPS Dishes with paraffin oil overlying

Dysplasie fibreuse polyostotique unilatérale du membre supérieur

La dysplasie fibreuse est une maladie osseuse sporadique rare d’étiologie inconnue qui représente environ 2,5 % des maladies osseuses et 7 % des tumeurs osseuses bénignes. Cette lésion bénigne pseudotumorale se caractérise par la présence dans l’os d’une prolifération de tissu fibreux et de tissu osseux immature dépourvu de couronne ostéoblastique. Elle peut atteindre un ou plusieurs os ; l’atteinte du membre supérieur est rarement décrite, nous rapportons ici un cas rare de dysplasie fibreuse polyostotique unilatérale du membre supérieure.Key words: Dysplasie fibreuse, unilatérale, polyostotique, membre supérieu

Ostéome ostéoide intra-articulaire du genou simulant un tableau d’arthrite du genou

L'ostéome ostéoïde est une tumeur bénigne ostéoblastique relativement rare, constituée d'une petite lésion de tissu charnu et vascularisé, appelé nidus, cernée d'une ostéocondensation réactionnelle. Il représente 2 à 3% de l'ensemble des tumeurs osseuses et 10 à 20 % des tumeurs osseuses bénignes et survient généralement entre 10 et 25 ans (extrêmes : 5-53 ans), avec une nette prédominance masculine. La localisation intra-articulaire est rare représentant environ 10 à 13% descas. La clinique et les images radiologiques, souvent  atypiques, rendent son diagnostic ardu. Le risque de traitement inadéquat est important. Jusqu'à 40% d'arthroscopies inappropriées ont été rapportés. Le cas rapporté illustre cette situation.Key words: Ostéome, genou, arthrit

Les fractures péri-prothétiques fémorales de la hanche: étude rétrospective à propos de 15 cas

La prise en charge d'une fracture au voisinage d'une prothèse de la hanche dépend de différents facteurs. En marge des facteurs liés à l'état physiologique du patient ou à l'expérience du chirurgien l'analyse précise de la fracture et de ses conséquences est essentielle.Le but de cette étude est d'évaluer les résultats des différents méthodes, proposer des indications en fonction des critères liés au terrain, au type et à la localisation de la fracture et à l'état de la fixation prothétique au moment de la fracture.Pan African Medical Journal 2016; 2

La place du clou Telegraph court dans le traitement des fractures de l’extrémité supérieure de l’humérus: à propos de 19 cas

La fracture de l'extrémité supérieure de l'humérus est la troisième fracture en fréquence chez les sujets âgés et leur répartition est bimodale touchant préférentiellement le sujet âgé ostéoporotique après un traumatisme à faible énergie ou plus rarement le sujet jeune par mécanisme à forte cinétique. Le traitement des fractures complexes de l'humérus proximal est le sujet de nombreuses controverses Le clou Telegraph constitue une approche thérapeutique très efficace pour les fractures déplacées de l'extrémité supérieure de l'humérus, de technique chirurgicale facile mais avec une courbe d'apprentissage et permettant un protocole de rééducation dans l'immédiat de l'intervention. C'est un matériel d'enclouage antérograde de 15 cm de long, plein verrouillé en proximal et en distal, le verrouillage proximal est assuré par 4 vis spongieuses, de filetage long, stables dans le clou et cela confère une solidité tout-à-fait remarquable à ce montage alors que le verrouillage distal est assuré au niveau du V deltoïdien en zone avasculaire et là où il n'y a pas de passage nerveux. L'étude présentée concerne 19 patients traités par un clou Telegraph court dans le traitement des fractures de l'extrémité supérieure de l'humérus entre 2013 et 2015 et elle a pour but d'analyser les résultats radio-cliniques et d'évaluer la répercussion de cette technique sur la fonction de l'épaule. Le clou Telegraph proposé depuis plus de 12 ans à peu près, a rencontré et continue de rencontrer un réel succès. Il permet de traiter très efficacement les fractures simples type 2 et 3, mais aussi les fractures impactées en valgus à 4 fragments. L'ostéosynthèse par clou Telegraph est une solution efficace, rapide et reproductible dans le traitement chirurgical des fractures de l'extrémité supérieur de l'humérus même en cas des fractures complexes et permet une reprise rapide de la mobilité de l'épaule.Pan African Medical Journal 2016; 2

TDMA-aware Routing Protocol for Multi-hop Communications in Vehicular Ad Hoc Networks

International audienceVehicular Ad-Hoc Networks (VANETs) have become an emerging technology due to the variety of their applicationsin Intelligent Transportation Systems (ITS). By creating a vehicular network, each vehicle can exchange information toinform drivers in other vehicles about the current status of the traffic flow or a dangerous situation. Multi-hop communicationsis an effective method that can be used for information exchange over distances greater than the transmission range of thetransmitting vehicle. However, it is a great challenge to ensure a stable multi-hop communication link with a low delivery delaydue to the high mobility of the vehicles involved. The goal of this paper is to design a TDMA aware Routing Protocolfor Multi-hop wireless vehicular ad hoc networks (TRPM) in order to provide the ability to transmit/receive packets over longdistances. The proposed routing scheme is based on a medium access control protocol, in which the intermediate vehicles areselected based on the TDMA scheduling. The simulation results reveal that our routing protocol significantly outperforms otherprotocols in terms of average end-to-end delay, average number of relay vehicles and the average delivery ratio

TDMA-based MAC Protocols for Vehicular Ad Hoc Networks: A Survey, Qualitative Analysis and Open Research Issues

International audience—Vehicular Ad-hoc NETworks (VANETs) have attracted a lot of attention in the research community in recent years due to their promising applications. VANETs help improve traffic safety and efficiency. Each vehicle can exchange information to inform other vehicles about the current status of the traffic flow or a dangerous situation such as an accident. Road safety and traffic management applications require a reliable communication scheme with minimal transmission collisions, which thus increase the need for an efficient Medium Access Control (MAC) protocol. However, the design of the MAC in a vehicular network is a challenging task due to the high speed of the nodes, the frequent changes in topology, the lack of an infrastructure, and various QoS requirements. Recently several Time Division Multiple Access (TDMA)-based medium access control protocols have been proposed for VANETs in an attempt to ensure that all the vehicles have enough time to send safety messages without collisions and to reduce the end-to-end delay and the packet loss ratio. In this paper, we identify the reasons for using the collision-free medium access control paradigm in VANETs. We then present a novel topology-based classification and we provide an overview of TDMA-based MAC protocols that have been proposed for VANETs. We focus on the characteristics of these protocols, as well as on their benefits and limitations. Finally, we give a qualitative comparison, and we discuss some open issues that need to be tackled in future studies in order to improve the performance of TDMA-based MAC protocols for vehicle to vehicle (V2V) communications

Using Road IDs to Enhance Clustering in Vehicular Ad hoc Networks

International audience—Vehicular ad hoc networks (VANETs) where vehicles act as mobile nodes is an instance of Mobile Ad hoc NETworks (MANETs), which are essentially developed for intelligent transportation systems. A challenging problem when designing communication protocols in VANETs is coping with high vehicle mobility, which causes frequent changes in the network topology and leads to frequent breaks in communication. The clustering technique is being developed to reduce the impact of mobility between neighboring vehicles. In this paper, we propose an Adaptive Weighted Cluster Protocol for VANETs, which is a road map dependent and uses road IDs and movement direction in order to make the clusters structure as stable as possible. The experimental results reveal that AWCP outperforms four other most commonly used clustering protocols in terms of control packet overhead, the packet delivery ratio, and the average cluster lifetime, which are the most usual metrics used for comparing performance

A Fully Distributed TDMA based MAC Protocol for Vehicular Ad Hoc Networks

—The Vehicular Ad-Hoc NETwork (VANET) consists of a set of vehicles moving on roads which can communicate with each other through ad hoc wireless devices. VANET has attracted a lot of attention in the research community in recent years with the main focus on its safety applications. One of the challenges for vehicular network is the design of an efficient Medium Access Control (MAC) protocol due to the hidden node problem, the high speed of the nodes, the frequent changes in topology, the lack of an infrastructure, and various QoS requirements. Motivated by this observation, we design a fully distributed and location-based TDMA scheduling scheme for VANETs networks, named DTMAC. The main goal of this work is to propose a MAC protocol that can provide fairness in accessing the transmission medium, as well as reduce access collision and merging collision under various conditions of vehicular density without having to use expensive spectrum and complex mechanisms such as CDMA or OFDMA. An analytical model of the average access collision probability and throughput are derived which can be used to evaluate the performance of DTMAC protocol as well as to validate the simulation results under different traffic conditions