Corneal Endothelium
Mostrando 13-24 de 92 artigos, teses e dissertações.
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13. Avaliação clínica e pela microscopia eletrônica de varredura do adesivo de fibrina, comparativamente ao fio de sutura na oclusão da incisão de córnea: estudo experimental em coelhos
As técnicas de remoção de catarata evoluíram nas últimas décadas. Na tentativa de oclusão da córnea após incisão para remoção da catarata, diversas técnicas têm sido propostas. Objetivou-se avaliar experimentalmente a viabilidade do emprego do adesivo de fibrina na oclusão da incisão de córnea em coelhos. Além disso, comparar os efeitos do
Publicado em: 2009
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14. Estudo clínico observacional da facoemulsificação com ultra-som torsional na microincisão coaxial de 2,2 mm
Objective: to clinically evaluate the performance of the phacoemulsification cataract surgery using the torsional technology Infiniti Vision SystemTM - OZilTM U/S Torsional with 2,2 mm clear corneal microcoaxial incision. Methods: observational clinical study comprising 96 eyes with nuclear or cortico-nuclear cataract grade 2 according to Lens Opacities Clas
Publicado em: 2008
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15. Relação da pressão intra-ocular e paquimetria corneal com os diferentes estágios de desenvolvimento das cataratas diabéticas e não diabéticas em cães da raça Poodle / Relationship of intraocular pressure and corneal thickness to diabetic and nondiabetic cataracts in Poodles
Diabetes mellitus (DM) causes different alterations in all corneal layers, such as deficient control of hydration, what makes them prone to decompensate after injury. Lens induced uveitis (LIU) occurs mainly in dogs presenting hypermature cataracts, what causes irreversible damages to the corneal endothelium and may lead to stromal edema, usually transient.
Publicado em: 2008
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16. Collagens and proteoglycans of the corneal extracellular matrix
The cornea is a curved and transparent structure that provides the initial focusing of a light image into the eye. It consists of a central stroma that constitutes 90% of the corneal depth, covered anteriorly with epithelium and posteriorly with endothelium. Its transparency is the result of the regular spacing of collagen fibers with remarkably uniform diam
Brazilian Journal of Medical and Biological Research. Publicado em: 2003-08
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17. Transplantation of cultured bovine corneal endothelial cells to rabbit cornea: clinical implications for human studies.
Rabbit corneas denuded of their endothelium were coated with bovine corneal endothelial cells (from steers) previously maintained in tissue culture for short (20 generations) or prolonged (200 generations) periods. When grafted back into female rabbits, the corneal buttons remained clear and showed no edema. In contrast, denuded corneas coated with bovine ke
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18. STUDIES ON THE CORNEAL AND TRABECULAR ENDOTHELIUM I. CEMENT SUBSTANCE OF THE CORNEAL ENDOTHELIUM*
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19. Expression of SV40 virus large T antigen by recombinant adenoviruses activates proliferation of corneal endothelium in vitro.
Infection with the Ad5-SVR4 virus was used to introduce the large T antigen encoding region of the SV40 virus into bovine and human corneal endothelial cells. Expression of large T antigen occurred in 40% of bovine corneal endothelial cells after a 24-h incubation time versus 12% after 8 h of incubation. By 48 h after infection, almost all (92.8%) bovine cor
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20. Non-invasive assessment of the donor corneal endothelium using ocular redox fluorometry.
AIMS: To investigate the usefulness of ocular redox fluorometry for evaluating donor corneal endothelial viability. METHODS: Corneas from 42 recipients of penetrating keratoplasty and four donor corneas were examined by ocular redox fluorometry. Autofluorescence from reduced pyridine nucleotides (PN) and oxidised flavoproteins (Fp) of the human corneal endot
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21. Clinical observations on the corneal thickness and the corneal endothelium in diabetes mellitus.
The corneal thickness was measured by pachometry and the corneal endothelium was photographed by specular microscopy in 81 insulin-dependent juvenile diabetic outpatients. The corneal thickness of a normal group, diabetics without and with proliferative retinopathy was (mean +/- SD): 0.527 +/- 0.028, 0.544 +/- 0.028, and 0.566 +/- 0.027 mm, respectively (2p
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22. Topical aldose reductase inhibitor for correcting corneal endothelial changes in diabetic patients.
BACKGROUND--Marked variations in cell size (polymegethism) and shape (pleomorphism) are characteristic of the corneal endothelium in diabetic patients and animals. METHOD--Wide field specular microscopy was used to evaluate the clinical efficacy of treating the diabetic corneal endothelium with topical instillation of 0.5% aldose reductase inhibitor, CT-112.
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23. The apparent reflexion coefficient of the leaky corneal endothelium to sodium chloride is about one in the rabbit.
1. Rabbit corneal thickness changes were measured after some of the NaCl in the bathing Ringer solution was substituted by a neutral sugar. 2. The response had three phases which could be closely modelled by three exponentials of different amplitudes and rate constants, originating from the time of the substitution. 3. The first, fastest, phase was interpret
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24. Paracellular ionic and transcellular water diffusions across rabbit corneal endothelium.
1. Corneal endothelial cell membrane electrical resistance is estimated at about 400 M omega by using intracellular micro-electrodes. 2. If all ion diffusion across the endothelium were transcellular, electrical resistance of the endothelial monolayer would be about 1300 omega cm2, as there are about 3000 cells mm-2. 3. Measured endothelial monolayer resista