Introduction: The oculoauriculovertebral spectrum (OAVS) are anomalies of the first and second pharyngeal arches, causing craniofacial changes, principally facial asymmetry, as well as anomalies in the spine, that can be a cause of instability of the craniocervical junction - manipulation of an unstable spine can result in morbimortality. However, few studies have related OAVS to craniocervical instability. Objectives: Correlate patients with OAVS through radiography with craniocervical instability and prediction of its occurrence. Material and Methods: Through a radiographic study of the cervical spine, the assessment of vertebral malformations and the presence of craniocervical instability was performed and clinical assessment using the OMENS score as a phenotypic criteria for patients with OAVS, by a specialized multidisciplinary team. Student’s t test, Kolmogorov-Smirnova, and χ2 were performed. Results: Twenty-six patients with OAVS were evaluated, 7 (26.9%) had craniocervical instability, the OMENS score was 3 times higher, but without statistical significance. All patients with instability also had spinal malformations, and of those without craniocervical instability (19 patients), 57.8% had spinal malformations. Vertebral malformations had a similar incidence in those with and without instability, the most common being scoliosis. There was no statistical significance in the presence or absence of spinal malformations with the presence or absence of craniocervical instability. Extracraniofacial findings were found in all patients with instability; 71.4% of them were radial. Conclusions: Patients with higher OMENS scores had more craniocervical instability but without statistical significance. It also did not show statistical relevance between the presence of malformations and craniocervical instability.

Lipid layer thickness decrease due to meibomian gland dysfunction leads to tear film instability and reflex tear secretion. Ann Med 2022;54:893-899 8. Lee SM, Chung SJ, Lew H. Evaluation of tear film lipid layer thickness measurements obtained using an ocular surface interferometer in nasolacrimal duct obstruction patients.

O concreto, enquanto novo e íntegro, possui pH elevado e alta resistividade elétrica. Essas características conferem excelente proteção contra a corrosão para as ferragens de aço nele embutidas. Com o passar do tempo o concreto pode absorver água, CO2, cloretos e outros poluentes. Essa contaminação reduz o pH e a resistividade elétrica do concreto, fazendo com que as ferragens passem a operar na faixa de corrosão do Diagrama Potencial x pH, também conhecido como Diagrama de Pourbaix. Quando isso acontece o aço fica despassivado, pemitindo o funcionamento das pilhas de corrosão. Para proteger as ferragens nessas condições a única soluçâo, eficiente e econômica, consiste na utilização de anodos de proteção catódica, desenvolvidos especialmente para essa finalidade. Os anodos podem ser instalados durante a construção, durante os serviços de recuperação do concreto ou nos casos em que a corrosão ainda não aflorou mas já foi diagnosticada pelas medições dos potenciais de corrosão das ferragens, conforme a ASTM ferragem, corrosão, proteção catódica.

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