Implementação de um sistema para simulação por Monte Carlo da passagem de fotões através do olho humano mediante a utilização da plataforma GEANT4 – II

Dissertação para obtenção do Grau de Mestre em Engenharia Biomédica

Potential immunological markers for diagnosis and therapeutic assessment of toxocariasis

In human toxocariasis, there are few approaches using immunological markers for diagnosis and therapeutic assessment. An immunoblot (IB) assay using excretory-secretory Toxocara canis antigen was standardized for monitoring IgG, IgE and IgA antibodies in 27 children with toxocariasis (23 visceral, three mixed visceral and ocular, and one ocular form) for 22-116 months after chemotherapy. IB sensitivity was 100% for IgG antibodies to bands of molecular weight 29-38, 48-54, 95-116, 121-162, >205 kDa, 80.8% for IgE to 29-38, 48-54, 95-121, > 205 kDa, and 65.4% for IgA to 29-38, 48-54, 81-93 kDa. Candidates for diagnostic markers should be IgG antibodies to bands of low molecular weight (29-38 and 48-54 kDa). One group of patients presented the same antibody reactivity to all bands throughout the follow-up study; in the other group, antibodies decayed partially or completely to some or all bands, but these changes were not correlated with time after chemotherapy. Candidates for monitoring patients after chemotherapy may be IgG antibodies to > 205 kDa fractions, IgA to 29-38, 48-54, 81-93 kDa and IgE to 95-121 kDa. Further identification of antigen epitopes related to these markers will allow the development of sensitive and specific immunoassays for the diagnosis and therapeutic assessment of toxocariasis.

Evaluation of seroepidemiological toxoplasmosis in HIV/AIDS patients in the south of Brazil

Toxoplasmosis is considered one of the opportunistic infections for individuals with the Acquired Immunodeficiency Syndrome (AIDS), and is also a major cause of morbidity and mortality. The aim of this study was to evaluate the prevalence of neurotoxoplasmosis, ocular toxoplasmosis and antibodies for Toxoplasma gondii in HIV-positive patients attending the SAE (Specialized Assistance Service for HIV/AIDS), as well as to associate their serological profile with epidemiological and clinical data. A total of 250 patients participated in the study from December, 2009 to November, 2010. Serological analysis was performed using the indirect immunofluorescent technique; epidemiological data were gathered by a questionnaire, and clinical history was based on the analysis of medical charts. Prevalence of seropositivity was 80%, with history of neurotoxoplasmosis in 4.8% and of ocular toxoplasmosis in 1.6% of the patients. The Highly Active Antiretroviral Treatment (HAART) was not used by 32% of the patients, 18.4% of the patients had CD4+ T- lymphocyte count less than 200 cells/mm³ and 96.8% of them were not aware of the modes of disease transmission. These findings led us to conclude that the study population is at high risk of clinical toxoplasmosis, because of both reactivation of infection in the seropositive patients who do not make a regular use of HAART, and primo-infection in seronegative patients worsened by an unawareness of the modes of infection reported in this study.

Sulfite Oxidase Deficiency – An Unusual Late and Mild Presentation

Introduction: Sulfite oxidase deficiency (SOD) is an autosomal recessive inherited disease usually presenting in the neonatal period with severe neurological symptoms including seizures, often refractory to anticonvulsant therapy, and a rapidly progressive encephalopathy resembling neonatal hypoxic ischemia, with premature death. Most patients develop dislocated ocular lenses. Later or milder presentations of SOD are being reported with increasing frequency. These presentations include neurological regression with loss of previously acquired milestones or movement disorders. Case report: We report a four years old girl presenting with intermittent ataxia and uncoordinated limb movements. A similar episode of ataxia had occurred previously, one year before, with complete neurologic recovery and normal developmental milestones. Bilateral lens dislocation had been recently diagnosed. Cranial MRI demonstrated bilateral globus pallidus enhancement. Low homocysteine was found in plasma and SulfitestR was positive. Further investigations led to confirmation of isolated sulfite oxidase deficiency with no enzyme activity detected on skin fibroblasts culture. Discussion: This case illustrates the clinical variability of SOD and it is not only atypical but also seems to be the mildest form described so far. The association of ectopia lentis with a movement disorder, even without psychomotor regression, should prompt us to look for this diagnosis.

A go-to-market strategy for green extration and impregnation

Dissertação para obtenção do Grau de Mestre em Biotecnologia

Alterações da função visual e da qualidade de vida relacionada com a saúde em indivíduos idosos

RESUMO: Introdução: A visão é um sentido fundamental na relação do indivíduo com os mais variados ambientes, sendo elemento central na funcionalidade e independência do idoso, qualquer perturbação da função visual provoca limitações na qualidade de vida. As alterações demográficas em curso caracterizam-se pelo envelhecimento progressivo da população, paralelamente constata-se um aumento da prevalência de perturbações do sistema visual com alteração da função e do funcionamento visual. Considerando que os indivíduos idosos são mais dependentes da visão, e que não existem para esta área estudos desenvolvidos em Portugal, esta investigação tem como fundamento analisar a influência que a perturbação da função visual em indivíduos com 65 ou mais anos tem na qualidade de vida relacionada com a saúde. Estudaram-se também as características sócio-demográficas dos indivíduos participantes, da saúde visual e a percepção da saúde geral, bem como identificaram se junto dos idosos participantes e de Médicos especialistas em Medicina Geral e Familiar perspectivas sobre perturbações da função visual e envelhecimento. Desenho de estudo: Estudo transversal, caso-controlo e descritivo-exploratório. Materiais e Métodos: A partir de uma população de 112 indivíduos com 65 ou mais anos, frequentadores de várias instituições de apoio social do Concelho de Loures e de idosos frequentadores/institucionalizados da Mansão de Santa Maria de Marvila, unidade orgânica da Fundação D. Pedro IV, foram incluídos no estudo 90 (80,4%). Após consentimento informado, procedeu-se à avaliação da função visual nos Laboratórios de Ortóptica da Escola Superior de Tecnologia de Saúde de Lisboa, onde também se aplicaram o Questionário de Funcionamento Visual VFQ-25 e uma questão aberta para o tipo de dificuldades de visão sentidas durante o último ano. Aplicou-se ainda, em ambiente virtual, uma pergunta aberta a Médicos especialistas em Medicina Geral e Familiar para aspectos relacionados com o diagnóstico/suspeita relativamente tardio de perturbações da função visual. Procedeu-se ao tratamento descritivo das características sócio-demográficas, da percepção de saúde geral e da saúde visual e das respostas dos idosos e dos médicos. Analisou-se a relação entre função visual e qualidade de vida relacionada com a saúde aplicando o teste não-paramétrico de Mann-Whitney. Resultados: Constatou-se que os indivíduos da amostra são maioritariamente do género feminino (71,1%), casados (41,1%), detentores de baixos níveis de escolaridade em que 63,3% apenas frequentou/concluiu o 1º ciclo do ensino básico e quase na sua totalidade reformados (88,9%). Verifica-se que 77,8% dos idosos percepciona a sua saúde geral como razoável ou boa. Da mesma forma, 86,7% dos indivíduos têm a função visual alterada devido principalmente à alteração da acuidade visual para longe (86,7%), registando-se que 65,5% dos olhos tinham uma acuidade visual igual ou superior a 5/10. Outras dimensões que contribuíram para a alteração da função visual contam-se a sensibilidade ao contraste (63,3%), estereopsia (51,1%), visão cromática (38,9%) e a motilidade ocular (25,6%). Obtiveram-se assim maiores pontuações para as diversas escalas do questionário VFQ-25 em indivíduos com função visual alterada exceptuando nas escalas actividades de perto, condução e dependência. Verificou-se portanto existir relação entre alteração da função visual e perturbação da qualidade de vida relacionada com a saúde. À questão colocada aos idosos, 42,6% não manifestou qualquer razão para que visse mal/sentisse dificuldades de visão durante o último ano. A diminuição da acuidade visual para longe/perto foi referida por 20,5% dos indivíduos, seguido pela deterioração do estado de saúde geral e ocular por 15%. As respostas do Médicos especialistas em Medicina Geral e Familiar sobre razões para a suspeita/diagnóstico relativamente tardia das perturbações da função visual, indicam a iliteracia dos idosos para a saúde da visão e semiologia ocular (34%), a baixa formação/informação dos Médicos de Medicina Geral e Familiar na área da saúde da visão (22%) e a pouca acessibilidade e resposta demorada/ineficaz dos serviços de oftalmologia do SNS (20%) como principais motivos para os assuntos questionados.Conclusões: As alterações do sistema visual com impacto na função e no funcionamento visual alteram a qualidade de vida relacionada com a saúde, devido principalmente à alteração da acuidade visual para longe. Os idosos do estudo não valorizam a saúde visual ao percepcionarem positivamente a saúde geral e a saúde visual relativamente à avaliação da função visual. É fundamental definir estratégias e programas de literacia para a saúde da visão para toda a população, não apenas destinados a idosos. Sugere-se repensar o modelo de formação base dos Médicos com especial incidência na área da saúde da visão, com necessidades sentidas de formação/informação. As respostas obtidas dos idosos e dos Médicos indicaram existir fragilidades na saúde da visão, necessário repensar o modelo de prestação de cuidados de saúde nesta área. Esta investigação permitiu ao autor uma reflexão sobre as temáticas relacionadas com o envelhecimento levando a uma mudança de atitudes e comportamento na abordagem profissional a indivíduos idosos, promovendo autonomia nas escolhas e decisões em questões de saúde, na criação de estratégias para lidar com o problema de visão e na adaptação à nova condição de saúde da visão.---------------ABSTRACT:Purpose: The vision is a fundamental sense in the individual's relationship with the most varied environments, a central element in the functionality and independence of the elderly, any disturbance of visual function causes limitations in quality of life. The current demographic changes are characterized by progressive aging of population, there has been a parallel increase in the prevalence of disorders of the visual system by changing the visual function and functioning. Whereas the elderly are more dependent on vision, and there are no studies in this area developed in Portugal, this research is based analyze the influence that the disturbance of visual function in subjects aged 65 years or more has on the health related quality of life. We studied also the socio-demographic characteristics of the subjects, the eye health and general health perception, and identified themselves with the elderly participants and medical specialists in Family General Medicine perspective on disorders of visual function and aging. Design: Cross-sectional study, case control, descriptive and exploratory. Methods: From a population of 112 people with 65 or more years, regulars of various social welfare institutions of the Municipality of Loures and elderly regulars/institutionalized the Mansion of Santa Maria de Marvila, organic unity of the Foundation D. Pedro IV, were included 90 (80.4%). After informed consent, proceeded to the assessment of visual function in the Laboratories of Orthopticsof the School of Health Technology of Lisbon, where he also applied the Visual Functioning Questionnaire VFQ-25 and an open question for the type of vision difficulties experienced during the last year. Was applied also in a virtual environment, an open question to Doctors specialists in family general medicine related to the diagnosis/suspected relatively late disturbance of visual function. We carried out the descriptive treatment of socio-demographic characteristics, perception of general health and eye health and the responses of older people and doctors. We analyzed the relationship between visual function and quality of life related to health by applying the nonparametric Mann-Whitney test. Results: We found that individuals in the sample are mostly female (71.1%), married (41.1%), holders of low levels of education in which only 63.3% frequented / completed the 1st cycle of primary and almost entirely retired (88.9%). It is found that 77.8% of the elderly perceive their general health as fair or good. Likewise, 86.7% of individuals have altered vision mainly due to the change in visual acuity away (86.7%),up to 65.5% of eyes had a visual acuity of 5/10 or greater. Other dimensions that contributed to the alteration of visual function include contrast sensitivity (63.3%), stereopsis (51.1%), color vision (38.9%) and ocular motility (25.6%). There was thus obtained the highest scores for different scales of the questionnaire VFQ-25 in patients with altered vision except for scales related to near activities, driving and dependence. It is therefore a relationship between alteration in visual function and disturbance of quality of life related to health. To question for the elderly, 42.6% expressed no reason to see evil/feel difficulty seeing over the last year. The decrease in visual acuity for distance/near was reported by 20.5% of subjects, followed by the deterioration of general health and eye for 15%. The responses of medical specialists in general practice about reasons for the suspicion/diagnosis relatively late disturbance of visual function, indicate the illiteracy of the elderly for healthy vision and ocular semiology (34%), low education/information for Doctors in the health of vision (22%) and poor accessibility and response timeconsuming/ inefficient NHS ophthalmology services (20%) as main reasons for the subjects questioned. Conclusion: Changes in the visual system with an impact on visual function and the functioning change the health related quality of life, mainly due to the change in distance visual acuity. Older people do not value the visual health perceiving the general health and eye health positively relatively of visual function. It is essential to define strategies and literacy programs for eye health for the entire population, not just for the elderly. It is suggested reconsider the model of basic training of Doctors with special focus on the health of the vision, with special needs sensed training/information. The responses of older people and doctors have indicated there is weakness in eye health, need to rethink the model of health care in this area. This research allowed the author to reflect on issues related to aging leading to a change in attitudes and behavior in professional approach to the elderly, promoting autonomy in choices and decisions in health issues, creating strategies to deal with the problem of vision and adaptation to new conditions of eye health.

Lesões Oculares por Processionária

Introdução: A Processionária (thaumetopoea pityocampa Schiff), vulgarmente conhecida como “lagarta do pinheiro” é um inseto dos pinheiros e cedros, endémico em meios rurais mas também em meios urbanos em Portugal. A toxicidade ocular, rara nas últimas décadas pelo desenvolvimento de métodos de erradicação eficazes, é provocada pelos seus pelos e prevê-se mais frequente com o recrudescimento deste inseto. Revemos a epidemiologia da Processionária e as suas lesões oculares a partir de 3 casos clínicos. Material e métodos: Caso 1: Doente de 64 anos recorre ao Serviço de Urgência (SU) com olho direito vermelho e sensação de corpo estranho após prática de jardinagem. A observação revela VODc: 0.5, erosão epitelial, presença de 1 filamento no estroma corneano profundo, flare (++) e Tyndall (+++). Caso 2: Doente de 28 anos, recorre ao SU por dor intensa no olho direito acompanhada de hiperémia após contacto com lagarta. Apresenta VODc: 0.6 e Tyndall (+++) com presença de múltiplos filamentos (mais de 20) a diferentes profundidades da córnea. Caso 3: Doente de 26 anos, recorre ao SU por sensação de corpo estranho e lacrimejo constante no olho direito, após ter estado a realizar exercícios militares num parque urbano. Apresenta VODc: 0.3, múltiplas erosões epiteliais punctiformes na metade nasal da córnea que recobriam filamentos de cor laranja e Tyndall (+). Foi instituída terapêutica com corticoide tópico e vigilância sintomática a cada um dos casos. Resultados: A patologia ocular por Processionária decorre da toxicidade dos seus pelos, cuja migração ocorre preponderantemente no sentido intraocular. Inclui por isso lesões precoces (conjuntivite, queratite e uveíte) e tardias (catarata, pars planite, vitrite e retinite). Os casos apresentados possuíam lesões iniciais, tendo recuperado totalmente do quadro inflamatório após 6 meses mas mantendo os pelos inativos no estroma corneano. A gravidade destes casos prende- -se com a possibilidade de migração intraocular, que pode ocorrer anos após o episódio inicial, obrigando a uma vigilância ao longo da vida. Conclusões: O recrudescimento da Processionária tanto em meios rurais como urbanos em Portugal justifica o conhecimento das lesões oculares que pode causar e do seu tratamento.

Position Statement on Bioresorbable Vascular Scaffolds in Portugal

BACKGROUND: Bioresorbable vascular scaffolds (BVS) were recently approved for percutaneous coronary intervention in Europe. The aim of this position statement is to review the information and studies on available BVS, to stimulate discussion on their use and to propose guidelines for this treatment option in Portugal. METHODS AND RESULTS: A working group was set up to reach a consensus based on current evidence, discussion of clinical case models and individual experience. The evidence suggests that currently available BVS can produce physiological and clinical improvements in selected patients. There are encouraging data on their durability and long-term safety. Initial indications were grouped into three categories: (a) consensual and appropriate - young patients, diabetic patients, left anterior descending artery, long lesions, diffuse disease, and hybrid strategy; (b) less consensual but possible - small collateral branches, stabilized acute coronary syndromes; and (c) inappropriate - left main disease, tortuosity, severe calcification. CONCLUSION: BVS are a viable treatment option based on the encouraging evidence of their applicability and physiological and clinical results. They should be used in appropriate indications and will require technical adaptations. Outcome monitoring and evaluation is essential to avoid inappropriate use. It is recommended that medical societies produce clinical guidelines based on high-quality registries as soon as possible.

A Novel Autosomal Recessive GJA1 Missense Mutation Linked to Craniometaphyseal Dysplasia

Craniometaphyseal dysplasia (CMD) is a rare sclerosing skeletal disorder with progressive hyperostosis of craniofacial bones. CMD can be inherited in an autosomal dominant (AD) trait or occur after de novo mutations in the pyrophosphate transporter ANKH. Although the autosomal recessive (AR)form of CMD had been mapped to 6q21-22 the mutation has been elusive. In this study, we performed whole-exome sequencing for one subject with AR CMD and identified a novel missense mutation (c.716G>A, p.Arg239Gln) in the C-terminus of the gap junction protein alpha-1 (GJA1) coding for connexin 43 (Cx43). We confirmed this mutation in 6 individuals from 3 additional families. The homozygous mutation cosegregated only with affected family members. Connexin 43 is a major component of gap junctions in osteoblasts, osteocytes, osteoclasts and chondrocytes. Gap junctions are responsible for the diffusion of low molecular weight molecules between cells. Mutations in Cx43 cause several dominant and recessive disorders involving developmental abnormalities of bone such as dominant and recessive oculodentodigital dysplasia (ODDD; MIM #164200, 257850) and isolated syndactyly type III (MIM #186100), the characteristic digital anomaly in ODDD. However, characteristic ocular and dental features of ODDD as well as syndactyly are absent in patients with the recessive Arg239Gln Cx43 mutation. Bone remodeling mechanisms disrupted by this novel Cx43 mutation remain to be elucidated.

Detecção de artefactos em imagens da retina

Dissertação para obtenção do Grau de Mestre em Engenharia Biomédica

FACTORS RELATED TO ORAL CANDIDIASIS IN ELDERLY USERS AND NON-USERS OF REMOVABLE DENTAL PROSTHESES

This study examined the association between oral candidiasis in elderly users and nonusers of prosthesis and its predisposing factors. To this end, we performed a cross-sectional study where saliva samples from 48 patients were collected they used prosthesis and 43 patients (control group) who did not use. Among the 91 patients, Candida spp were isolated in 40 (83.3%) who used prosthesis and in 23 (53.5%) in the control group. A statistically significant association was determined between the two groups, the isolation of yeasts and dental prosthesis (p < 0.05, OR = 4.3). The most common etiological agent was Candida albicans (37 isolates), with 23 (62.2%) in the denture group and 14 (37.8%) (control group). Among patients who presented clinical manifestations of oral candidiasis (n = 24), 83.3% (n = 20) belonged to the group that wore dentures, while only 16.7% (n = 4) belonged to the control group. Elderly patients with diabetes had 4.4 times higher estimated risk of developing oral candidiasis when compared with individuals without this condition. There was no statistically significant association between being user prostheses and have diabetes with the onset of candidiasis. No statistically significant association was determined between xerostomia, use of prosthesis and oral candidiasis. The use of prosthetics and poor oral hygiene in elderly patients predisposes to the development of oral candidiasis.

Lesões Oculares por Processionária (Thaumetopoea Pityocampa Schiff): Relatos de Casos

A Processionária (Thaumetopoea pityocampa Schiff ), vulgarmente conhecida como “lagarta do pinheiro” é um inseto dos pinheiros e cedros, endêmico em meios rurais mas também em meios urbanos. A toxicidade ocular, rara nas últimas décadas pelo desenvolvimento de métodos de erradicação eficazes, é provocada pelos seus pelos e prevê-se mais frequente com o recrudescimento deste inseto. Revemos a epidemiologia da Processionária e as suas lesões oculares a partir de 3 casos clínicos. Caso 1: Doente de 64 anos recorre ao Serviço de Urgência (SU) com olho direito vermelho e sensação de corpo estranho após prática de jardinagem. A observação revela AVODc: 0,5, erosão epitelial, presença de um filamento no estroma corneano profundo, flare (++) e Tyndall (+++). Caso 2: Doente de 28 anos, recorre ao SU por dor intensa no olho direito acompanhada de hiperemia após contato com lagarta. Apresenta AVODc: 0,6 e Tyndall (+++) com presença de múltiplos filamentos (mais de 20) a diferentes profundidades da córnea. Caso 3: Doente de 26 anos, recorre ao SU por sensação de corpo estranho e lacrimejamento constante no olho direito, após realizar exercícios militares num parque urbano. Apresenta AVODc: 0,3, múltiplas erosões epiteliais puntiformes na metade nasal da córnea que recobriam filamentos de cor laranja e Tyndall (+). Foi instituída terapêutica com corticoide tópico e vigilância sintomática a cada um dos casos. A patologia ocular por Processionária decorre da toxicidade dos seus pelos, cuja migração ocorre preponderantemente no sentido intraocular. Inclui por isso lesões precoces (conjuntivite, queratite e uveíte) e tardias (catarata, pars planite, vitreíte e retinite). Os casos apresentados possuíam lesões iniciais, tendo recuperado totalmente do quadro inflamatório após seis meses mas mantendo os pelos inativos no estroma corneano. A gravidade destes casos prende-se à possibilidade de migração intraocular, que pode ocorrer anos após o episódio inicial, obrigando a uma vigilância ao longo da vida. Conclusão: O recrudescimento da Processionária, tanto em meios rurais como urbanos,justifica o conhecimento das lesões oculares que pode causar e o seu tratamento.

Familial Abdominal Aortic Aneurysm Is Associated With More Complications After Endovascular Aneurysm Repair

OBJECTIVE: A familial predisposition to abdominal aortic aneurysms (AAAs) is present in approximately one-fifth of patients. Nevertheless, the clinical implications of a positive family history are not known. We investigated the risk of aneurysm-related complications after endovascular aneurysm repair (EVAR) for patients with and without a positive family history of AAA. METHODS: Patients treated with EVAR for intact AAAs in the Erasmus University Medical Center between 2000 and 2012 were included in the study. Family history was obtained by written questionnaire. Familial AAA (fAAA) was defined as patients having at least one first-degree relative affected with aortic aneurysm. The remaining patients were considered sporadic AAA. Cardiovascular risk factors, aneurysm morphology (aneurysm neck, aneurysm sac, and iliac measurements), and follow-up were obtained prospectively. The primary end point was complications after EVAR, a composite of endoleaks, need for secondary interventions, aneurysm sac growth, acute limb ischemia, and postimplantation rupture. Secondary end points were specific components of the primary end point (presence of endoleak, need for secondary intervention, and aneurysm sac growth), aneurysm neck growth, and overall survival. Kaplan-Meier estimates for the primary end point were calculated and compared using log-rank (Mantel-Cox) test of equality. A Cox-regression model was used to calculate the independent risk of complications associated with fAAA. RESULTS: A total of 255 patients were included in the study (88.6% men; age 72 ± 7 years, median follow-up 3.3 years; interquartile range, 2.2-6.1). A total of 51 patients (20.0%) were classified as fAAA. Patients with fAAA were younger (69 vs 72 years; P = .015) and were less likely to have ever smoked (58.8% vs 73.5%; P = .039). Preoperative aneurysm morphology was similar in both groups. Patients with fAAA had significantly more complications after EVAR (35.3% vs 19.1%; P = .013), with a twofold increased risk (adjusted hazard ratio, 2.1; 95% confidence interval, 1.2-3.7). Secondary interventions (39.2% vs 20.1%; P = .004) and aneurysm sac growth (20.8% vs 9.5%; P = .030) were the most important elements accounting for the difference. Furthermore, a trend toward more type I endoleaks during follow-up was observed (15.6% vs 7.4%; P = .063) and no difference in overall survival. CONCLUSIONS: The current study shows that patients with a familial form of AAA develop more aneurysm-related complications after EVAR, despite similar AAA morphology at baseline. These findings suggest that patients with fAAA form a specific subpopulation and create awareness for a possible increase in the risk of complications after EVAR.

The Impact of Multifocal Intraocular Lens in Retinal Imaging with Optical Coherence Tomography

Multifocal intraocular lenses (MF IOLs) have concentric optical zones with different dioptric power, enabling patients to have good visual acuity at multiple focal points. However, several optical limitations have been attributed to this particular design. The purpose of this study is to access the effect of MF IOLs design on the accuracy of retinal optical coherence tomography (OCT). Cross-sectional study conducted at the Refractive Surgery Department of Central Lisbon Hospital Center. Twenty-three eyes of 15 patients with a diffractive MF IOL and 27 eyes of 15 patients with an aspheric monofocal IOL were included in this study. All patients underwent OCT macular scans using Heidelberg Spectralis®. Macular thickness and volume values and image quality (Q factor) were compared between the two groups. There were no statistically significant differences between both groups regarding macular thickness or volume measurements. Retinal OCT image quality was significantly lower in the MF IOL group (p < 0.01). MF IOLs are associated with a significant decrease in OCT image quality. However, this fact does not seem to compromise the accuracy of spectral domain OCT retinal measurements.

Mid-Term Results of EVAR in Severe Proximal Aneurysm Neck Angulation.

OBJECTIVE: To determine if mid-term outcome following endovascular aneurysm repair (EVAR) with the Endurant Stent Graft (Medtronic, Santa Rosa, CA, USA) is influenced by severe proximal neck angulation. METHODS: A retrospective case-control study was performed using data from a prospective multicenter database. All measurements were obtained using dedicated reconstruction software and center-lumen line reconstruction. Patients with neck length >15 mm, infrarenal angle (β) >75°, and/or suprarenal angle (α) >60°, or neck length >10 mm with β >60°, and/or α >45° were compared with a matched control group. Primary endpoint was primary clinical success. Secondary endpoints were freedom from rupture, type 1A endoleak, stent fractures, freedom from neck-related reinterventions, and aneurysm-related adverse events. Morphological neck variation over time was also assessed. RESULTS: Forty-five patients were included in the study group and were compared with a matched control group with 65 patients. Median follow-up time was 49.5 months (range 30.5-58.4). The 4-year primary clinical success estimates were 83% and 80% for the angulated and nonangulated groups (p = .42). Proximal neck angulation did not affect primary clinical success in a multivariate model (hazard ratio 1.56, 95% confidence interval 0.55-4.41). Groups did not differ significantly in regard to freedom from rupture (p = .79), freedom from type 1A endoleak (p = .79), freedom from neck-related adverse events (p = .68), and neck-related reinterventions (p = .68). Neck angle reduction was more pronounced in patients with severe proximal neck angulation (mean Δα -15.6°, mean Δβ -30.6°) than in the control group (mean Δα -0.39°, mean Δβ -5.9°) (p < .001). CONCLUSION: Mid-term outcomes following EVAR with the Endurant Stent Graft were not influenced by severe proximal neck angulation in our population. Despite the conformability of the device, moderate aortic neck remodeling was identified in the group of patients with angulated neck anatomy on the first computed tomography scan after implantation with no important further remodeling afterwards. No device integrity failures were encountered.