ABSTRACT
Les brides rétractiles post-brûlure au niveau du pied sont considérées comme graves en raison de leurs retentissement fonctionnel et esthétique potentiellement importants. Nous rapportons un cas pédiatrique âgé de 13 ans présentant des brides rétractiles au niveau des deux pieds, négligées depuis 10 ans et responsables d'une déformation très importante, avec désaxation marquée des orteils. Le patient souffrait d'une importante limitation des activités et d'une impossibilité de chaussage. La libération chirurgicale des brides par plusieurs plasties en Z associées à la réaxation des orteils luxés a permis d'obtenir un bon résultat avec un retour à une fonction quasi normale. La prévention des brides rétractiles et leur prise en charge précoce restent le meilleur moyen d'éviter des déformations grave et leurs conséquences chez un patient en croissance.
Post-burn retractile contractures of the foot are considered serious given their potentially significant functional and aesthetic repercussions. We report a 13-year-old paediatric case with retractile contractures in both feet neglected for 10 years and responsible for a very significant deformity with marked misalignment of the toes. The patient suffered from a severe limitation of activities and an inability to put on shoes. The surgical release of the contractures by several Z-plasties associated with the realignment of the dislocated toes allowed a good result to be obtained with a return to almost normal function. The prevention of retractable contractures and their early management remains the best way to avoid serious deformities and their consequences in a growing patient.
ABSTRACT
The molecular electronic density theory (MEDT) was invested to elucidate the chemo-, regio- and stereo-selectivity of the 1,3-dipolar cycloaddition between Diazomethane (DZM) and Psilostachyin (PSH). The DFT method at B3LYP/6-31 + G (d,p) level of theory was used. Reactivity indices, transition structures theory, IGM and ELF analysis were employed to reveal the mechanism of the reaction. The addition of DZM to PSH takes place through a one-step mechanism and an asynchronous transition states. Eight possible addition channels of reaction were investigated (addition of C (sp2) to Diazomethane at C4, C5, C6 or C7). The addition of C (sp2) at C5 leading to P1 product is the preferred channel. The addition of ether does not affect the chemo-, regio- and stereo-selectivity of the reaction. Analysis of transfer of charges along the IRC path associated with the P1 product shows a polar character for the studied reaction. We have also used the noncovalent interaction (NCI) which is very helpful to reveal the most favored addition channel of the reaction, by analyzing the weak interactions in different TSs. Finally, we investigate about the potential of inhibition of some pyrazoline compounds against COVID-19-Mpro by performing a molecular docking calculations.
