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Manifestações oftalmológicas de doenças sistémicas

Anestesia em oftalmologia

Descrevem-se as várias técnicas anestésicas usadas em oftalmologia. História, indicações e diferentes tipos de anestesia.

Heterogeneidade Clínica de 6 Casos com a Mutação «MELAS» A3243G do DNA Mitocond...

Os autores descrevem três casos com apresentação clínica atípica de MELAS, assim como dois membros oligossintomáticos e um assintomático das duas famílias portadores da mutação A3243G do tRNAL"(" do DNA mitocondrial. Em todos os casos, esta mutação pontual associada a doenças com hereditariedade materna, estava presente em heteroplasmia.

Neuropatía óptica isquémica secundaria al uso de interferon

Introducción:La neuropatía óptica isquémica anterior (NOIA) es una disfunción visual provocada por la reducción temporal o permanente de perfusión sanguínea del segmento anterior del nervio óptico. Se manifiesta como una pérdida indolor de la visión evolucionando en horas o días, con característicos cambios altitudinales del campo visual. Oftalmoscopicamente se caracteriza por edema del disco óptico por veces c...

Orbital lymphangioma: a surgical challenge

Lymphangioma is an uncommon venolymphatic lesion with dead-end lymphatic channels, also defined as vascular hamartoma of lymphatic origin. Orbital lymphangiomas present management challenges to the ophthalmologist due to the tendency to recur locally unless it is completely excised, this is often difficult, because lymphangiomas tend to be infiltrative. The recurrence of hemorrhage and expansion can lead to vis...

Postenucleation socket syndrome: surgical repair

Introduction: A contracted eye socket is a functional and cosmetic misfortune to the patient. It makes impossible to the patient to wear an eye prosthesis, but also becomes a source of chronic infection, discharge and irritation. There are several surgical techniques to deal with the postenucleation socket syndrome. Methods: Six consecutive patients with postenucleation socket syndrome underwent reconstruction ...

Dacryocystorhinostomy: drill technique

Introduction: Dacryocystorhinostomy or DCR is a bypass procedure with an anastomosis between the lacrimal sac and the nasal mucosa via a bony ostium. It may be performed through an external skin incision or intranasally with or without endoscopic visualization. The success rates for endoscopic and external dacryocystorhinostomy vary widely (external 70-95%; endonasal 59-99%). Video: In the “classic” Dupuy-Dutem...

Controlled RNA contamination and degradation and its impact on qPCR gene expres...

RNA quality is of utmost importance to perform gene expression quantification by qPCR. The classical methods used to determine \RNA\ quality are based on electrophoresis and spectrophotometer assessment, namely A260/A280 and A260/A230 ratios. It was previously shown that due to the complex nature of Staphylococcus epidermidis biofilms, \RNA\ extraction procedures could impact mRNA quality and thus accurate quan...

The deformation of cylindrical shells subjected to radial loads using mixed for...

The objective of this work is to contribute with a simple and reliable numerical tool for the stress analysis of cylindrical vessels subjected to generalized forces using a mixed formulation. Variational techniques coupled with functional analysis are used to obtain an optimized solution for the shell displacement and further stress field evaluation using a combination of unknown analytic functions with Fourier...

Comportamento tribocorrosivo de sistemas metalocerâmicos odontológicos de Ni-Cr...

Partial fixed prosthodontic restoration is used to rehabilitate both the form and function of partial or total compromised teeth and must remain permanently joined to the remaining teeth. The most useful material in prosthodontics is feldspar porcelain, commercialized as aluminosilicate powders. Dental porcelains depict limited mechanical strength to rehabilitate extensive spaces. The association of porcelain w...