Factores de riesgo de la endoftalmitis posquirúrgica en la cirugía de catarata / Risk factors for postsurgical endophthalmitis in the cataract surgery

OBJETIVO: identificar factores de riesgo asociados a la endoftalmitis poscirugía de catarata. MÉTODOs: se realizó un estudio retrospectivo-observacional analítico de caso-control de enero de 2011 a diciembre de 2013. Se incluyeron pacientes operados de cirugía de catarata. La muestra quedó conformada por 33 casos que sufrieron endoftalmitis posquirúrgica y los controles por 65 pacientes. La información se obtuvo de las hojas de trazabilidad quirúrgica y de la planilla de casos infectados del Instituto Cubano de Oftalmología "Ramón Pando Ferrer". RESULTADOS: el sexo masculino representó un riesgo mayor que el femenino (p= 0,014; OR= 2,91). La cirugía practicada en la estación de verano incrementó el riesgo de endoftalmitis (p= 0,000; OR= 9,91), así como un volumen quirúrgico mayor de 10 casos por posición (p= 0,000; OR = 27,8). La ruptura de cápsula posterior representó un riesgo mayor (p= 0,016; OR= 7,00). La técnica de Blumenthal resultó un riesgo mayor que la faco (p= 0,008; OR= 3,60). Otras variables como la edad, la diabetes mellitus y el tiempo quirúrgico, destacadas en otras series, no tuvieron significación estadística en este estudio. CONCLUSIONES: el sexo masculino, el clima elevado y la técnica de Blumental representan un mayor riesgo en la aparición de la endoftalmitis posquirúrgica.

OBJECTIVE: to identify the risk factors associated to endophthalmitis after cataract surgery. METHODS: case-control analytical observational and retrospective study conducted from January 2011 through December 2013, which included those patients operated on for cataract. The final sample was made up of 33 cases who suffered postsurgery endophthalmitis and 65 patients were included as controls. The information was collected from surgical traceability sheets and from the infected case forms at "Ramon Pando Ferrer" Cuban Institute of Ophthalmology. RESULTS: males were at greater risk for the disease than females (p= 0,014; OR= 2,91). The surgery performed at summer time increased the risk of suffering endophthalmitis (p= 0,000; OR= 9,91) as well as a surgical volume over 10 cases per surgical position (p= 0,000; OR= 27,8). The posterior capsule rupture was the major risk (p= 0,016; OR=7,00). Blumenthal technique resulted in greater risk for endophthalmitis than the phaco technique (p= 0,008; OR= 3,60). Other variables such as age, diabetes mellitus and surgical time, which were remarkable in other case series, had no statistical significance in this study. CONCLUSIONS: males, the high climate and the Blumenthal technique represent a greater risk in the apparition of the postsurgery endophthalmitis.

Prevalence of myopic shifts among patients seeking cataract surgery / Prevalencia de cambios miópicos en pacientes con catarata

Modern cataract surgery by phacoemulsification is a widely accepted procedure with a rapid recovery time. The prescription of specific intraocular lens, implanted during surgery, makes it possible to anticipate whether the patient will need reading glasses after the procedure. The present study analyses a sample of cataract surgery patients to show the frequency of myopic shifts related to nuclear opacity, which can result in clear near vision before surgery. A non-selected sample of consecutive patients who underwent elective cataract surgery in a private clinic was studied retrospectively. The myopic shift in refraction was assessed by comparing the old prescription with the spectacle correction at the time of interviewing.The mean age of the 229 subjects studied was 71.5 ± 10.4 years (109, 47.6%, males). A myopic shift in refraction, defined as at least - 0.5 diopters, was present in 37.1% of subjects (95% CI: 30.8%-43.4%). The mean change in refraction in these subjects was -2.52 ± 1.52 diopters. The percentage of subjects who had developed a myopic shift was significantly greater in those who presented greater nuclear opalescence. There were also differences in the mean myopic shift by refractive group, with the emmetropes having the greatest myopic shift. In this study of patients seeking cataract surgery in a clinical setting, more than one third had myopic shifts in refraction. This must be taken into account in order that patients maintain the benefit of clear near vision after surgery.

La cirugía moderna de facoemulsificación del cristalino tiene una recuperación muy rápida. La elección correcta del lente intraocular que se coloca en la cirugía permite, muchas veces, anticipar si el paciente va a precisar anteojos luego de la cirugía. Este estudio analiza una muestra de pacientes con catarata, mostrando la frecuencia relativa de cambios miópicos que permiten a los pacientes ver de cerca sin lentes antes de la cirugía. Se estudiaron retrospectivamente una serie de pacientes consecutivos que realizaron cirugía electiva de catarata. El cambio refractivo miópico fue documentado comparando las prescripciones antiguas con la medición subjetiva al momento del estudio. Los sujetos fueron agrupados de acuerdo a la presencia o ausencia de cambios miópicos, y se estudiaron las proporciones con respecto a su grado de opacidad nuclear. La edad promedio de los 229 sujetos estudiados fue de 71.5 ± 10.4 años, 109 (47.6%) varones. Se halló un cambio miópico, definido como un cambio mayor de - 0.5 dioptrías, en 85 (37.1%, IC95%: 30.8-43.4%). El porcentaje de sujetos con cambio miópico fue significativamente mayor en aquellos que tenían mayor opacidad nuclear al tiempo del examen. En este estudio de pacientes no seleccionados que buscaban realizar cirugía de catarata, más de un tercio tuvo cambios miópicos en la refracción. Si el paciente lograba ver bien de cerca antes de la cirugía, esto debería ser tenido en cuenta a la hora de elegir un correcto lente intraocular para que el sujeto no pierda este beneficio de la catarata.

Current trends in cataract surgery in Thailand--2004 survey.

OBJECTIVES: To survey and investigate the current trend of cataract surgery in Thai ophthalmologists in 2004. MATERIAL AND METHOD: Questionnaires were sent to 600 ophthalmologists who were the members of the Ophthalmological Society and Royal Colleges of Ophthalmologists of Thailand. Data received from 248 (41.3%) of the recipients were analyzed and compared with those from the previous survey. RESULTS: The majority of respondents were male (63.3%) while 36.7% were female. In cataract surgery, 99.2% were still doing cataract surgery, the average number of cataract surgery procedures per surgeon per month was 25.6, 89.8% preferred phacoemulsification, and 42.5% preferred acrylic lens. The posterior capsular tear was the most common complication. CONCLUSION: There are trends toward more cataract surgical procedures performed by a surgeon, increasing preference of topical anesthesia, small incision wound and foldable acrylic lenses which reflected the popularity of phacoemulsification.

Second eye cataract surgery: perceptions of a population assisted at a university hospital

OBJETIVO: Identificar dificuldades na vida diária percebidas por pacientes com catarata senil, antes e após a cirurgia de catarata no segundo olho. MÉTODOS: Estudo longitudinal prospectivo de 84 pacientes consecutivos atendidos por "Projeto Catarata", com acuidade visual maior ou igual a 20/30 no olho pseudofácico e menor ou igual a 20/40 with the best possible optical correction no olho com catarata. Aplicou-se questionário por entrevista. RESULTADOS: Antes da cirurgia 60,7% declararam dificuldade visual (média ou muita); após, 92,8% nenhuma dificuldade. Atividades rotineiras, de mobilidade e lazer alteraram-se significativamente após a cirurgia (p= 0,001). CONCLUSÃO: Na percepção dos pacientes, após a cirurgia de catarata do segundo olho houve redução importante das dificuldades visuais.

Valor preditivo da glicemia de jejum pré-operatória de pacientes diabéticos quanto ao resultado cirúrgico da cirurgia de catarata / Predictive value of preoperative fasting glucose test of diabetic patients regarding surgical outcome in cataract surgery

OBJETIVO: Determinar o valor preditivo do resultado da glicemia de jejum pré-operatória de pacientes diabéticos tipo 2, com idade superior a 40 anos, sobre a acuidade visual pós-operatória e a ocorrência de complicações clínicas peroperatórias, em facectomias sob anestesia local, num centro médico acadêmico. MÉTODOS: Foram analisados pacientes diabéticos tipo 2, maiores que 40 anos de idade, com facectomias indicadas entre 10 de fevereiro de 2000 e 10 de janeiro de 2001 em hospital universitário, cujo Serviço de Oftalmologia assiste a região em torno da cidade de Campinas, São Paulo, Brasil. Os pacientes foram avaliados por um clínico uma semana antes da cirurgia, além de realizarem os exames glicemia de jejum e eletrocardiograma. Os pacientes com resultados de glicemia de jejum anormal não tiveram as cirurgias postergadas, ou seja, o resultado do exame laboratorial, isoladamente, não foi considerado motivo para suspender a cirurgia. De acordo com o resultado da glicemia de jejum, o paciente era designado para um dos grupos: grupo de glicemia normal (60-115 mg/dL) e grupo de glicemia anormal (>115 mg/dL). Acuidade visual pós-operatória corrigida e complicações clínicas peroperatórias eram registradas em formulário padronizado. RESULTADOS: A amostra incluiu um total de 193 pacientes diabéticos tipo 2, desses 67 (34,7 por cento) tiveram o resultado da glicemia de jejum dentro dos limites normais (grupo glicemia normal) e 126 (65,3 por cento) fora destes limites (grupo glicemia anormal). A média do resultado da glicemia de jejum nos pacientes com glicemia normal foi de 98,5±17,3 mg/dL e a do grupo com glicemia anormal foi de 166,5± 48,9 mg/dL (p< 0,001). Ocorreram complicações intra-operatórias em 21 (10,7 por cento) pacientes, todos casos de hipertensão arterial. Desses, 7 (10,5 por cento) em pacientes com glicemia normal e 14 (11,1 por cento) pacientes com glicemia anormal (p<0,888). Não houve diferença estatisticamente significante, entre os grupos, em relação à acuidade visual pós-operatória corrigida. CONCLUSÕES: Não se observou influência da glicemia de jejum pré-operatória nas complicações clínicas intra-operatórias ou na acuidade visual final.

Appropriateness Ratings in Cataract Surgery

This study aimed to evaluate the appropriateness of cataract surgery and identify the characteristics of patients and surgeons, clinical and functional outcomes, and surgical methods associated with appropriate cataract surgery. For this purpose, Korean cases of cataract surgery were rated as either 'necessity', 'appropriate', 'uncertain' or 'inappropriate', based on RAND/UCLA Ratings. For this assessment, the cases of 222 patients who underwent cataract surgery, on either one or both eyes, were studied. The surgeries were performed by 20 ophthalmologists practicing at one of fourteen medical institutions (university hospitals and general hospitals). Patients were interviewed and clinical data collected. The Doctors were questioned with self-entered questionnaire forms. The medical records were also examined to gain an understanding of the surgical process. The ratings were as follows: 30.6% (68 patients) of surgeries belonged to the bracket "necessity", 46.4% (103 patients) to "appropriate", 15.3% (34 patients) to "uncertain" and 7.7% (17 patients) to "inappropriate". In this study, "necessity" and "appropriate" were defined as "appropriate" (77.0%, 171 patients), and "uncertain" and "inappropriate" as "inappropriate" (23.0%, 51 patients). The low preoperative Snellen visual acuity and visual function, advanced age and male patients were associated with appropriate surgery. It is concluded that appropriate surgery was related to the clinical and functional outcomes (visual acuity and visual function) and patient characteristics (age and male).