ABSTRACT
@#AIM:To compare the two techniques of pre-chop and non-pre-chop, and discuss the technical advantages of the capsulorhexis forceps assisted pre-chop.METHODS:Totally 149 cases of age-related cataract were randomly divided into using pre-chop (Group A) and non-pre-chop (Group B) techniques groups, for Group A patients received phacoemulsification after pre-chop by using capsulorhexis forceps.The ultrasonic energy, average phacoemulsification time, intraoperative complications, 1d, 1wk uncorrected visual acuity (UCVA) and 1d, 3d,1wk postoperative corneal edema were recorded and compared.RESULTS:The subgroups of the same group of nuclei were compared in the two groups.The ultrasonic time in Group A was lower than that of Group B, and the difference was significant(P<0.01).Also the corneal edema in the former was lighter than that of the latter(P<0.05).There was difference in uncorrected visual acuity(UCVA) between groups(P<0.05).CONCLUSION:Compared with non-pre-chop, the time of ultrasound in pre-chop group was shorter, the degree of corneal edema was lighter and early postoperative UCVA was better.
ABSTRACT
Objetivo: evaluar los cambios endoteliales y resultados visuales en los ojos de pacientes con diagnóstico de catarata senil, operados por técnica de facoemulsificación por pre chop o extracción extracapsular del cristalino por túnel esclerocorneal.Métodos: se realizó un estudio descriptivo y prospectivo de 100 pacientes (ojos) atendidos en el Instituto Cubano de Oftalmología Ramón Pando Ferrer, de septiembre a diciembre de 2010. La mitad fueron operados por facoemulsificación y el resto por túnel esclerocorneal. Se analizaron las variables: mejor agudeza visual corregida y sin corrección, dureza del cristalino, conteo celular endotelial, hexagonalidad, coeficiente de variabilidad, astigmatismo medio inducido y tiempo efectivo de ultrasonido...
Objective: to evaluate the endothelial changes occurred and the visual results achieved in the eyes of patients diagnosed with senile cataract, who were operated on either by the prechop phacoemulsification technique or by the extracapsular extraction of the crystalline through the scleracorneal tunnel.Methods: a prospective and descriptive study of 100 patients (eyes) seen at Ramón Pando Ferrer Cuban Institute of Ophthalmology from September to December 2010 was conducted. One half was operated on by phacoemulsification whereas the other underwent scleracorneal tunnelized extraction. The analyzed variables were: best uncorrected and corrected visual acuity, endothelial cellular count, hexagonality, variability coefficient, mean induced astigmatism and effective phaco time...
Subject(s)
Humans , Male , Female , Endothelium, Corneal/physiopathology , Cataract Extraction/adverse effects , Cataract Extraction/methods , Phacoemulsification/methods , Limbus Corneae/surgery , Epidemiology, Descriptive , Prospective StudiesABSTRACT
Este estudio se propuso determinar los resultados obtenidos con la técnica de Pre-Chop en la cirugía de catarata por facoemulsificación en el Centro de Microcirugía Ocular del Hospital Oftalmológico Docente "Ramón Pando Ferrer" en el 2001. El universo de trabajo estuvo constituido por todos los pacientes (ojos) con diagnóstico de catarata presenil y senil y recibieron tratamiento quirúrgico con la técnica de Pre-Chop por facoemulsificación. Se analizaron como variables: edad, sexo, agudeza visual con corrección, microscopia endotelial y cilindro refractivo, todos en el pre y posoperatorio, así como el tiempo de ultrasonido y complicaciones más frecuentes. Estos datos se analizaron a través de tablas de contingencia con frecuencias absolutas y relativas, medias y se utilizó la prueba T de Student para su comparación. Se encontró que la catarata predominó en el sexo masculino entre los 46 y los 60 años; la agudeza visual con corrección mejoró a 0.64 (20/40) como promedio, el cilindro refractivo apenas se modificó, el tiempo de ultrasonido aplicado estuvo dentro de valores normales, la pérdida de células endoteliales no fue importante y la complicación transoperatoria más frecuente fue rotura de cápsula posterior con salida de vítreo y queratitis.
The aim of this paper was to determine the results obtained with the Pre Chop technique in the cataract surgery by phacoemulsification at the Center of Ocular Microsurgery of "Ramón Pando Ferrer" Ophthalmological Teaching Hospital in 2001. All the patients (eyes) with diagnosis of presenile and senile cataract that received surgical treatment with the Pre Chop technique by phacoemulsification were included in the study. Variables such as age, sex, visual acuity with correction, endothelial microscopy, refractive cylinder in the pre- and postoperative, time of ultrasound and the most frequent complications, were analyzed through contingency tables with mean absolute and relative frequencies. The T student test was used for their comparison. It was observed that cataract predominated among males aged 46-60. The visual acuity with correction improved by 0.64 (20/40) as an average. The refractive cylinder hardly changed, the time of ultrasound applied was within the normal values, the loss of endothelial cells was not significant and the commonest transoperative complication was the rupture of the posterior capsule with protrusion of vitreous and keratitis.