Comparación de la biometría ultrasónica de inmersión e interferometría de coherencia parcial, mediante la refracción esperada, según el cálculo del lente implantado y la refracción obtenida
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Fecha
2011
Profesor/a Guía
Facultad/escuela
Idioma
es
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Universidad Andrés Bello
Nombre de Curso
Licencia CC
Licencia CC
Resumen
En el transcurso de los años, ha sido de suma importancia el estudio de la implantación
de lentes intraoculares (LIOs). En Noviembre de 1949, Harold Ridley realiza la primera
implantación exitosa de un LIO, sin embargo el índice de fracaso fue de un 50% debido a que
las características de estos no eran las adecuadas.
Actualmente la implantación del LIO se utiliza en cristalino claro y cataratas, esta
corresponde a una opacidad parcial o total del cristalino, la cual se reconoce mundialmente
como la primera causa de ceguera reversible. En el censo INE 2002 la prevalencia de ceguera
total en Chile fue de 0.28%, el 50% de estos casos son provocados por catarata bilateral.
En la presente unidad de investigación, se comparan los métodos de biometría
ultrasónica de inmersión (BUI) e interferometría de coherencia parcial (ICP), mediante la
refracción esperada para cada técnica, según el cálculo del LIO multifocal SN6AD3 y la
refracción obtenida. Planteando como hipótesis que ambas técnicas no tienen diferencias
significativas en la refracción esperada para el cálculo del LIO implantado.
Para la obtención de los datos se utilizó la técnica de BUI mediante el equipo
" UltraScan" de Alean, e ICP a través de un equipo " lo! Master 500" de Zeiss.
La metodología de este estudio es de tipo retrospectiva, donde se analizaron exámenes
y fichas médicas de un total de 40 pacientes (80 ojos) operados dentro del periodo 2008 -
primer semestre 2011 en Instituto Oftalmológico Integral, región Metropolitana. Sólo se
analizaron pacientes operados y examinados por el mismo médico cirujano oftalmólogo y el
mismo tecnólogo médico con especialidad en Oftalmología respectivamente.
Dentro de los resultados más importantes encontramos que existe una diferencia
estadísticamente significativa en los valores de refracción, que apuntan a que los resultados
del cálculo del LIO por ICP son más cercanos a la emetropía que mediante la técnica de BUI.
During the pass of the years the intraocular lens (IOL) implantation study has been very important subject. In November 1949, Harold Ridley, make the first successful implantation of I0L, however the failure rate was like 50%, because the conditions of these wasn't the appropriate. In Present, the implantation process of IOL is used for "clear lens" and "cataracts", this mean a partial opacity o total of the crystalline, wich is worldwide recognized like the first cause of reversible total blindness. During the INE Census of 2002 the prevalence of total blindnees in Chile was like 0.28%. the 50% of these cases arc caused by bilateral cataracts. In this investigation unit, we compare the ultrasonic biometrical methods of immersion and interferometry of partial coherence, by the refraction method for each technique, according to the calculation of multifocal IOL SN6AD3 and the obtained refraction. Hypothesized both techniques don't have big significant differences in the expected refractive for the calculation of the implanted IOL. To obtain the data was used the ultrasonic biometrics technique of immersion, using the "UltraScan- equipment of Alcon, and partial coherence interferometry through the "lot Master 500" equipment of Zeiss. The methodology of this study is retrospective, were analyzed exams and medical profiles with a total of 40 patients ( 80 eyes) operated within the period of 2008. first semester of 2011 of Instituto Oftalmológico Integral, Capital City. Only was analyzed the operated patients and examined for the same ophthalmology medical and the same medical technologist specializing in ophthalmology respectively. Among the most important results we find a statistically significant difference in the values of refraction. which suggests that the results of calculation of the IOL by ICP are closer to emetropia that through the BUI technique.
During the pass of the years the intraocular lens (IOL) implantation study has been very important subject. In November 1949, Harold Ridley, make the first successful implantation of I0L, however the failure rate was like 50%, because the conditions of these wasn't the appropriate. In Present, the implantation process of IOL is used for "clear lens" and "cataracts", this mean a partial opacity o total of the crystalline, wich is worldwide recognized like the first cause of reversible total blindness. During the INE Census of 2002 the prevalence of total blindnees in Chile was like 0.28%. the 50% of these cases arc caused by bilateral cataracts. In this investigation unit, we compare the ultrasonic biometrical methods of immersion and interferometry of partial coherence, by the refraction method for each technique, according to the calculation of multifocal IOL SN6AD3 and the obtained refraction. Hypothesized both techniques don't have big significant differences in the expected refractive for the calculation of the implanted IOL. To obtain the data was used the ultrasonic biometrics technique of immersion, using the "UltraScan- equipment of Alcon, and partial coherence interferometry through the "lot Master 500" equipment of Zeiss. The methodology of this study is retrospective, were analyzed exams and medical profiles with a total of 40 patients ( 80 eyes) operated within the period of 2008. first semester of 2011 of Instituto Oftalmológico Integral, Capital City. Only was analyzed the operated patients and examined for the same ophthalmology medical and the same medical technologist specializing in ophthalmology respectively. Among the most important results we find a statistically significant difference in the values of refraction. which suggests that the results of calculation of the IOL by ICP are closer to emetropia that through the BUI technique.
Notas
Tesis (Tecnólogo Médico, Especialidad en Oftalmología)
Palabras clave
Refracción Ocular, Optometría, Lente intraocular, Interferometría de Coherencia Parcial, Biometría Ultrasónica de Inmersión