Corneal opacity is one of the main causes of monocular blindness in the world. Various modifications of keratoplasty are considered radical, effective - and in some cases the only - way of visual rehabilitation of this category of patients. The article describes a case of using the original surgical method of ipsilateral automated anterior lamellar rotational autokeratoplasty. Application of the described surgical technique made it possible to preserve the advantages of the known methods of ipsilateral rotational penetrating autokeratoplasty (IRA) and to level out their main disadvantages. In addition, the use of anterior lamellar rotational autokeratoplasty allowed the endothelial layer of the cornea to remain intact; its decompensation is one of the main reasons for unsatisfactory outcomes of penetrating keratoplasty. The use of a microkeratome device and the formation of an interface between the layers of its own tissues made it possible to achieve clinically insignificant violation of light scattering in this zone. With the right choice of a patient with shallow local central corneal opacity and careful planning of the original method, ipsilateral lamellar rotational automated autokeratoplasty can be an alternative to both standard penetrating and lamellar allokeratoplasty.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.17116/oftalma2019135052209 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Mechanisms of alignment of lamellar-forming block copolymer under shear flow.
Soft Matter
December 2024
Departament de Física de la Matèria Condensada, Universitat de Barcelona, Martí i Franqués 1, 08028 Barcelona, Spain.
The potential applications of block copolymer thin films, utilising their self-assembly capabilities, are enhanced when achieving long-range ordering. In this study we explain the experimental alignment of lamellae under shear flow findings [S. Pujari , 2012, , 5258] and classify the alignment mechanisms based on shear rate and segregation, uncovering similarities to the systems subjected to electric fields, suggesting a common pathway of lamellae orientations.
View Article and Find Full Text PDFFabrication and characterization of potato short amylose, zein, and pectin ternary composite particles stabilized pickering emulsions and their application on nuciferine delivery.
Food Res Int
December 2024
Department of Food Science and Engineering, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, PR China. Electronic address:
Article Synopsis
- Nuciferine has potential health benefits like lowering blood sugar and fat but faces challenges due to poor water solubility and low bioavailability.
- Researchers created a ternary composite using short amylose, zein, and pectin to stabilize Pickering emulsions that can effectively deliver nuciferine, significantly improving its stability and bioavailability.
- The optimal conditions for preparing these emulsions, which achieved a high encapsulation rate for nuciferine, resulted in small particle sizes and demonstrated good stability against various environmental factors, supporting better delivery and effectiveness of the active ingredient.
Evaluation of digital radiographic measurements for the diagnosis of acute laminitis.
Equine Vet J
November 2024
Department of Clinical Studies-New Bolton Center, School of Veterinary Medicine, University of Pennsylvania, Kennett Square, Pennsylvania, USA.
Background: Traditional radiographic measurements of distal phalanx (Pd) displacement based on the outer hoof wall are not useful for diagnosis of acute laminitis.
Objectives: We hypothesised that the distance between the inner hoof wall and Pd ('lamellar lucent zone'; LLZ) measured on lateromedial digital radiographs would be increased in horses with acute and subacute laminitis compared with healthy horses.
Study Design: Retrospective cohort study and in vivo experimental study.
Plastic strain localization in Bouligand structures.
J Mech Behav Biomed Mater
January 2025
Shanghai Key Laboratory of Mechanics in Energy Engineering, Shanghai Institute of Applied Mathematics and Mechanics, School of Mechanics and Engineering Science, Shanghai University, Shanghai, 200444, PR China.
The Bouligand structure represents helicoidal stacking of aligned fibers; such a structure is widely observed in biological composites. Despite the progress in characterization of toughening caused by Bouligand arrangement of fibers, the inelastic deformation mechanisms of this structure remain elusive. In this study, we carry out calculations for plastic deformation of Bouligand structure, crossed-lamellar structure and the single lamellar structure.
View Article and Find Full Text PDFSolvent-adaptive hydrogels with lamellar confinement cellular structure for programmable multimodal locomotion.
Nat Commun
October 2024
Institute of Innovative Materials, Department of Chemistry, College of Science, Southern University of Science and Technology, Shenzhen, P. R. China.
Biological organisms can perform flexible and controllable multimodal motion under external stimuli owing to the hierarchical assembly of anisotropic structures across multiple length scales. However, artificial soft actuators exhibit the limited response speed, deformation programmability and movement capability especially in harsh environments because of insufficient anisotropic hierarchy and precision in structural design. Here, we report a programmed assembly directed confinement polymerization method for the fabrication of environmentally tolerant and fast responsive hydrogels with lamellar assembly-confined cellular structure interpenetrated with highly aligned nanopillars by the directional freezing-assisted polymerization in the predesigned anisotropic laminar scaffold.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!