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Dive into the research topics where Thiago Gonçalves dos Santos Martins is active.

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Featured researches published by Thiago Gonçalves dos Santos Martins.


International Journal of Ophthalmology | 2016

Mitomycin C in pterygium treatment.

Thiago Gonçalves dos Santos Martins; Ana Luiza Fontes de Azevedo Costa; Milton Ruiz Alves; Roger Chammas; Paulo Schor

Pterygium is a benign lesion usually growing from the nasal side of the conjunctiva onto the cornea. Most cases of pterygium does not cause problem or requires specific treatment. The exact cause of pterygium is not clear yet, but some factors are pointed as causes, being the most important the long-term ultraviolet ray exposure. Pterygium surgery is usually considered when there are symptoms that do not respond to conservative treatment. Recurrence is the main complication of the surgery, and much has been done to avoid it. Mitomycin C (MMC) has been used as a fibroblast proliferation inhibitor during the surgery to reduce the chance of recurrence of the pterygium. This review describes the use of MMC as an adjunctive, the optimal dosage, the duration of administration of MMC and possible complications, when used during, after and before the surgery. Most studies suggest that increased exposure (dose or duration) of MMC is associated with a lower recurrence, but with higher risks of complications.


Strabismus | 2017

Third Cranial Nerve Palsy after a Chikungunya Virus Infection

Ana Luiza Fontes de Azevedo Costa; Thiago Gonçalves dos Santos Martins; Diogo Gonçalves dos Santos Martins

ABSTRACT Chikungunya fever is a disease caused by a virus from the same family as dengue and Zika. It is endemic in several parts of the world and has recently spread to Latin America. We report the case of a patient, aged 58 years, from Rio de Janeiro, Brazil, who in 2013 developed an acute bilateral third cranial nerve palsy sparing the pupil. After extensive investigation, it was diagnosed as caused by chikungunya infection. The patient was treated with pulse therapy and after 5 months of the onset of the condition, the patient showed improvement.


International Journal of Ophthalmology | 2016

Ophthalmologic manifestations of celiac disease

Thiago Gonçalves dos Santos Martins; Ana Luiza Fontes de Azevedo Costa; Maria Kiyoko Oyamada; Paulo Schor; Aytan Miranda Sipahi

Celiac disease is an autoimmune disorder that affects the small intestine of genetically predisposed individuals. Ophthalmic manifestations are within the extra-intestinal manifestations, and can be divided into those of autoimmune disorders or those due to absorptive disabilities. This article reviewed the ophthalmologic manifestation of celiac disease. Ophthalmic symptoms are rare, but should be investigated in patients with celiac disease and taken into consideration as the first systemic manifestation.


Revista Brasileira De Ensino De Fisica | 2014

Modelo para o ensino da oftalmoscopia direta

Thiago Gonçalves dos Santos Martins; Ana Luiza Fontes de Azevedo Costa; Ricardo Vieira Martins; Elizabeth Nogueira Martins; Milton Ruiz Alves; O. Helene; Paulo Schor

Este trabalho apresenta um modelo de olho humano de simples construcao para ser usado no ensino da tecnica de oftalmoscopia direta para estudantes de medicina. O modelo facilita o aprendizado e contribui para a formacao de medicos adequadamente preparados para diagnosticar problemas que podem levar a cegueira, permitindo o rapido encaminhamento dos pacientes para os servicos especializados. Discutimos aqui alguns aspectos basicos da optica do olho humano e do oftalmoscopio direto, bem como do seu uso.


Einstein (São Paulo) | 2012

Contact lens use with intraestromal hemorrhage secondary to corneal neovascularization

Thiago Gonçalves dos Santos Martins; Ana Luiza Fontes de Azevedo Costa; Milton Ruiz Alves; Maristella Mendes Gonçalves

Uso de lente de contato com hemorragia intraestromal secundaria a neovascularizacao corneana


The Open Ophthalmology Journal | 2018

Teaching Ophthalmology for Machines

Thiago Gonçalves dos Santos Martins; Maria Carolina Francisco Kuba; Thomaz Gonçalves dos Santos Martins

In 1996, a survey conducted in Canada found that more than half of the curricula of medical schools in that country did not have a mandatory internship in ophthalmology [2]. In the United Kingdom, the average duration of medical curriculum of ophthalmology is 7.6 days, with 21% of medical schools not having compulsory education in ophthalmology [3]. The same could be true for nursing curriculum. Therefore, the resolution of all ophthalmological problems is concentrated in about 2% of trained physicians. In some countries, there is an aggravating factor including the unequal distribution of the medical doctors within the territory [4].


Strabismus | 2018

Response to this letter to the editor

Ana Luiza Fontes de Azevedo Costa; Thiago Gonçalves dos Santos Martins; Diogo Gonçalves dos Santos Martins

Dear editor, Thank you for the inquiry, it is very pertinent. In the first work-up of the patient in the emergency room, dengue serology was requested and it came negative. Dengue and Chikungunya are genetically distant, and cross-reaction is unlikely. In fact, dengue can cause joint pain. However, it is much more common and severe in chikungunya infection. In addition, dengue is asymptomatic in approximately 75% of cases while chikungunya causes symptoms in 75–95% of cases. The patient had been correctly vaccinated with the MMR according to the Brazilian National Program of Vaccines. She had no history of contact with anybody infected with measles. Brazil had eliminated measles since 2001. In December 2013, there was an epidemic that lasted for 20 months. Since July 2015, no more cases have been reported. For this reason, we believe that measles is also an unlikely differential diagnosis for this patient.


Revista Brasileira De Oftalmologia | 2017

Evaluation of preoperative subconjunctival single application of mitomycin C in primary pterygium

Thiago Gonçalves dos Santos Martins; Ana Luiza Fontes de Azevedo Costa; Karina Mie Furuzawa; Milton Ruiz Alves; Roger Chammas

Pterygia are usually benign lesions that do not require specific treatment. It is a fibrovascular growth onto the nasal side of the cornea. It`s cause has not been fully elucidated yet, but seems to be related to long -term ultraviolet ray exposure. When symptoms are not controlled with conservative treatment surgery is considered, but the recurrence rate is still high, and efforts have been made to avoid it. Mitomycin C (MMC) is a fibroblast proliferation inhibitor that can be used as adjuvant to surgery to reduce recurrence. We report here a case that describes pterygium surgery performed in both eyes of the same patient, being one with MMC and the other eye without it. Both pterygium were sent to laboratory analysis. The results and proliferation index were compared between the eyes. keywords: Mitomycin/therapeutic use; Pterygium/surgery; Pterygium/drug therapy; Recurrence DOI 10.5935/0034-7280.20170032 158 Martins TGS, Costa ALFA, Karina Mie Furuzawa KM, Alves MR, Chammas R Rev Bras Oftalmol. 2017; 76 (3): 157-60 IntRodução O pterígio é classicamente definido como uma doença degenerativa da superfície ocular, com formação triangular de tecido fibrovascular, que cresce a partir da conjuntiva em direção à superfície da córnea.(1) Embora sua patogênese ainda não tenha sido completamente elucidada, é muito provável que o pterígio represente uma resposta degenerativa do tecido conjuntivo fibroso a diferentes estímulos. Entre os fatores de risco para seu desenvolvimento, a exposição à radiação ultravioleta parece desempenhar um papel importante na indução de dano às células tronco do limbo. Como resultado, ocorre uma migração de tecido fibrovascular em direção à córnea.(2) Outros fatores de risco relacionados com o desenvolvimento do pterígio são os micro-traumas na região do limbo e fatores hereditários. O principal fator de risco é a exposição aos raios ultravioleta, e uma possível explicação para este fato seria a localização do pterígio, principalmente na fissura interpalpebral, que é mais exposta aos raios solares e a poeira, que gera inflamação da superfície ocular. Recentemente foi sugerido que há uma mutação no gene p53 do cromossoma 17 relacionado com o desenvolvimento do pterígio, e alterações na expressão de vários fatores de crescimento, tais como o fator de crescimento endotelial vascular A (VEGFA). O pterígio é caracterizado pela degeneração elastótica da substância própria conjuntival, com depósitos eosinofílicos e basófilos além da proliferação de fibroblastos. (1) O pterígio é duas vezes mais comum em homens.(2) Essa patologia foi descrita pela primeira vez em 1000 d.C por Susruta, o primeiro cirurgião oftálmico de acordo com a literatura.(3) Com o passar dos anos, muitos tratamentos médicos foram usados, tais como bile, urina, ácidos, radioterapia, tiotepa, 5-fluorouracil e mais recentemente, a mitomicina C (MMC). No passado, o uso de crina de cavalo foi descrito para remover pterígio.(4) A cirurgia é indicada quando o paciente sente desconforto apesar do uso de lubrificante ocular, quando há restrição da motilidade ocular, crescimento no eixo visual e queixas estéticas. Atualmente, o transplante de conjuntiva tem sido a técnica cirúrgica de eleição. Algumas técnicas cirúrgicas consistem na excisão do pterígio deixando exposta a esclera, mas a taxa de recorrência é de até 88%. (5,6) O objetivo do uso de mitomicina C como tratamento adjuvante é para evitar a recorrência do pterígio após a cirurgia.(7) Relato de caso Paciente EFM, sexo feminino, 57 anos, procurou o serviço de oftalmologia referindo um tecido de crescimento progressivo cobrindo ambos os olhos há 10 anos. Negava trauma, cirurgia ocular ou qualquer doença sistêmica. Ao exame apresentava a melhor acuidade visual corrigida de 20/20 em ambos os olhos. Pela biomicroscopia, pterígio nasal grau II em OD e grau II em OE. Pressão intraocular de 12 mmHg em ambos os olhos e fundoscopia sem alteração. Após uma semana da consulta no ambulatório de oftalmologia, a paciente foi submetida à exérese do pterígio de OD com transplante conjuntival e envio do tecido para análise laboratorial. Após dois meses da primeira cirurgia , fez-se injeção de 0,1 ml de mitomicina C 0,02% no corpo do pterígio do olho esquerdo e após duas semanas realizou-se exérese do pterígio com envio do tecido para análise. Após três meses da primeira cirurgia, o pterígio do olho direito recidivou. O acompanhamento total foi de quatro anos e não houve recidiva no olho esquerdo. Ambas as cirurgias foram realizadas sem intercorrências pelo mesmo cirurgião utilizando a mesma técnica de transplante conjuntival. Foi realizada a análise imunohistoquímica e avaliação da proliferação celular através da detecção do anticorpo Ki-67 (Clone MIB-1,Dako, M7240, Glostrup, Dinamarca). A paciente apresentou um índice de proliferação celular no olho direito de 1,50% e no olho esquerdo de 4,3%. (Figuras 1 e 2). Não apresentou nenhuma complicação ocular devido ao uso da mitomicina nos quatro anos de acompanhamento.


Revista Brasileira De Oftalmologia | 2017

Interstitial keratitis in patients with Cogan's Syndrome

Thiago Gonçalves dos Santos Martins; Ana Luiza Fontes de Azevedo Costa; Thomaz Gonçalves dos Santos Martins

Cogans syndrome is characterized by interstitial keratitis non-syphilis associated with vertigo, tinnitus and sensorineural hearing loss. We report a case that illustrates a model of multidisciplinary intervention in the diagnosis and treatment of disease.


European Journal of Ophthalmology | 2017

Comments to: Comparison of eyedrop instillation technique with and without a delivery device in inexperienced patients

Ana Luiza Fontes de Azevedo Costa; Thiago Gonçalves dos Santos Martins; Paulo Schor

with 58%, while 6% preferred the special sleeves with odors and 36% with both (5). At the end of the study, participants informed us what type of sleeve would be more useful and easier for proper identification of the bottles. Fifty-eight percent of the participants preferred the special sleeves with textures, 6% the special sleeve with scents, and 36% the special sleeves with both odors and scents. The use of special sleeves with different textures and odors facilitated the identification of the different eyedrop bottles, reducing the risk of misuse of the drugs. Although the 3 types of sleeves reduced the risks of eyedrop misidentification, most participants preferred just the special sleeves with different textures. Thus, the study showed how we could take advantage of the intact senses of patients with visual impairments to avoid eyedrop misidentification that may cause harmful effects. The improper use of eyedrops and incorrect identification of eyedrops are problems that need to be resolved (5).

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Paulo Schor

Federal University of São Paulo

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O. Helene

University of São Paulo

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Ricardo Vieira Martins

Federal University of Rio de Janeiro

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Roger Chammas

University of São Paulo

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Aytan Miranda Sipahi

Federal University of São Paulo

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Elizabeth Nogueira Martins

Federal University of São Paulo

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Grace Peng

Federal University of São Paulo

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