Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 15 de 15
Filter
1.
Rev. cuba. oftalmol ; 28(3): 0-0, jul.-set. 2015. tab
Article in Spanish | LILACS | ID: lil-769455

ABSTRACT

Objetivo: determinar la repercusión sobre el endotelio corneal, con la aplicación de las técnicas de prechop vs. phacochop en la cirugía de catarata por facoemulsificación. Métodos: se realizó un estudio prospectivo analítico de casos y controles, en el Servicio de Catarata adjunto al Centro de Microcirugía Ocular del Hospital Oftalmológico Docente Ramón Pando Ferrer, con el diagnóstico de catarata unilateral o bilateral, desde enero de 2013 hasta enero de 2014. A cincuenta pacientes se les aplicó el procedimiento prechop y a otros cincuenta phacochop. Las variables bajo estudio fueron la edad, el sexo, la dureza del núcleo del cristalino y el tiempo de aplicación del ultrasonido; y tanto en el preoperatorio como en el posoperatorio se tuvieron en cuenta la densidad celular, la hexagonalidad y el coeficiente de variabilidad. Resultados: al comparar los resultados posoperatorios en el grupo en que se aplicó prechop con los obtenidos por phacochop, hubo diferencias en la pérdida de densidad celular y de la hexagonalidad. Estas fueron mayores en el grupo phacochop. También hubo diferencias en el coeficiente de variabilidad y en el tiempo efectivo de facoemulsificación, los cuales fueron mayores en el grupo phacochop. Conclusiones: los resultados posoperatorios corroboran que los pacientes a quienes se les aplica prechop presentan mejor conservación del endotelio corneal que los que reciben phacochop(AU)


Objective: to determine the impact of the application of the techniques of prechop vs phacochop techniques on the corneal endothelium in the cataract surgery using phacoemulsification. Methods: a prospective, analytical case-control study in the cataract service of the Center of Ocular Microsurgery Ocular in Ramón Pando Ferrer teaching ophthalmological hospital, with the diagnosis of unilateral or bilateral cataract, and conducted from January 2013 to January 2014. Fifty patients underwent the prechop procedure and 50 were applied the phacochop method. The variables under study were age, sex, crystalline lens hardness and length of time of ultrasound application; both in the preoperative and postoperative phase, the cell density, hexagonality and the coefficient of variability were took into account. Results: when comparing the postoperative results in the prechop group with those of the phacochop one, there were differences in the loss of cell density and hexagonality, being greater in the phacochop group. There were also differences in the coefficient of variability, and the effective time of phacoemulsificación, which were greater in the phacochop group. Conclusions: the postoperative results corroborate that the group of patients under prechop procedure has better preservation of their corneal endothelium than those in the phacochop group(AU)


Subject(s)
Humans , Cataract Extraction/methods , Endothelium, Corneal/surgery , Phacoemulsification/adverse effects , Case-Control Studies , Prospective Studies
2.
Arq. bras. oftalmol ; 77(6): 382-387, Nov-Dec/2014. tab, graf
Article in English | LILACS | ID: lil-735805

ABSTRACT

Purpose: To describe quantitative and qualitative features of eyes with advanced bullous keratopathy assessed using ultrasound biomicroscopy, before and after anterior stromal puncture (ASP) or amniotic membrane transplantation (AMT) procedures to relieve chronic pain. Methods: The present descriptive comparative study included 40 eyes of 40 patients with chronic intermittent pain due to bullous keratopathy who were randomly assigned to one of the two treatments (AMT or ASP). Ultrasound biomicroscopy (Humphrey, UBM 840, 50 MHz transducer, immersion technique) was used, and a questionnaire about pain intensity was completed preoperatively and postoperatively at days 90 and 180, respectively. Exclusion criteria were age<18 years, presence of concurrent infection, ocular hypertension, and absence of pain. Results: In a 180-day follow-up, the AMT group exhibited mean central corneal thickness (CCT), 899.4 µm preoperatively and 1122.5 µm postoperatively (p<0.001); mean epithelial thickness (ET), 156.4 µm preoperatively and 247.8 µm postoperatively (p<0.001); and mean stromal thickness (ST), 742.9 µm preoperatively and 826.3 µm postoperatively (p=0.005). The ASP group exhibited mean CCT, 756.7 µm preoperatively and 914.8 µm postoperatively (p<0.001); mean ET, 102.1 µm preoperatively and 245.2 µm postoperatively (p<0.001); and mean ST, 654.6 µm preoperatively and 681.5 µm postoperatively (p<0.999). Correlations between CCT and pain intensity in the AMT group (p=0.209 pre- and postoperatively) and the ASP group (p=0.157 preoperatively and p=0.426 at the 180-day follow-up) were not statistically significant. Epithelial and stromal edema, Descemet’s membrane folds, epithelial bullae, and the presence of interface fluid were frequently observed qualitative features. Conclusion: CCT increased over time in both groups. The magnitude of CCT did not correlate with pain intensity in the sample studied. The presence of interface ...


Objetivo: Descrever as características quantitativas e qualitativas da biomicroscopia ultrassônica (UBM) em olhos com ceratopatia bolhosa avançada, antes e após os procedimentos de punção estromal anterior (ASP) ou transplante de membrana amniótica (AMT) para alívio de dor crônica. Métodos: Estudo comparativo descritivo incluindo 40 olhos de 40 pacientes com dor crônica intermitente devido a ceratopatia bolhosa, randomizados em duas modalidades de tratamento (AMT e ASP). Biomicroscopia ultrassônica (Humphrey, UBM 840, transdutor de 50 MHz, técnica de imersão) foi utilizada, e um questionário de avaliação da intensidade da dor foi aplicado no pré-operatório, e após 90 e 180 dias de pós-operatório. Critérios de exclusão foram: idade abaixo de 18 anos, presença de infecção, hipertensão ocular, e ausência de dor. Resultados: No seguimento de 180 dias, o grupo Transplante de membrana amniótica apresentou: média da espessura corneana central (CCT): 899,4 µm (pré), 1.122,5 µm (pós-operatório) (p<0,001); média da espessura epitelial (ET): 156,4 µm (pré), 247,8 µm (pós-operatório) (p<0,001); média da espessura estromal (ST): 742,9 µm (pré), 826,3 µm (pós-operatório) (p=0,005), e, grupo ASP apresentou: CCT média: 756.7 µm (pré), 914,8µm (pós-operatório) (p<0,001); ET média: 102,1 µm (pré), 245,2 µm (pós-operatório) (p<0,001); ST média: 654,6 µm (pré), 681.5 µm (pós-operatório) (p<0,999). A correlação entre intensidade da dor e espessura corneana central no grupo AMT (p=0,209 pré e pós-operatórios) e no grupo ASP (p=0,157 pré-operatório e p=0,426 aos 180 dias de seguimento) não foi significativa. Edema epitelial e estromal, dobras na membrana de Descemet, bolhas epiteliais, e presença de fluido na interface foram características qualitativas frequentemente observadas. Conclusão: A espessura corneana central aumentou ao longo do tempo em ambos os grupos. A magnitude da espessura corneana central não interfere na intensidade da dor ...


Subject(s)
Adult , Aged , Aged, 80 and over , Female , Humans , Male , Middle Aged , Young Adult , Corneal Diseases/surgery , Corneal Diseases , Amnion/transplantation , Blister/surgery , Corneal Pachymetry , Corneal Stroma/pathology , Corneal Stroma/surgery , Corneal Stroma , Endothelium, Corneal/pathology , Endothelium, Corneal/surgery , Endothelium, Corneal , Eye Pain/surgery , Microscopy, Acoustic/methods , Pain Measurement , Postoperative Period , Preoperative Period , Punctures , Pain Management/methods , Palliative Care/methods , Statistics, Nonparametric , Surveys and Questionnaires , Time Factors , Treatment Outcome
3.
Arq. bras. oftalmol ; 76(5): 301-304, set.-out. 2013. ilus
Article in Portuguese | LILACS | ID: lil-690609

ABSTRACT

OBJETIVO: Reportar complicações precoces numa série de transplantes endoteliais realizados por estagiários de córnea. MÉTODOS: Revisão retrospectiva dos transplantes endoteliais realizados por estagiários de córnea do segundo ano. Descritas as complicações precoces e respectivo tratamento. RESULTADOS: Foram realizados 34 transplantes endoteliais pelos estagiários de córnea entre julho de 2007 e agosto de 2008. Destes, 29 foram realizados pela técnica de "Descemet stripping endothelial keratoplasty" e 5 "Descemet stripping automated endothelial keratoplasty". Foram realizadas 15 cirurgias combinadas, 14 associadas a facoemulsificação com implante de lente intraocular e 1 associada a facectomia com implante de lente intraocular. A principal indicação foi por distrofia de Fuchs com 18 casos, 11 foram indicados por ceratopatia bolhosa após cirurgia de catarata, 4 por falência primária após transplante endotelial e 1 por distrofia endotelial congênita hereditária. A complicação mais encontrada foi descolamentos do botão doado em 8 olhos (23,5%). Falência primária foi encontrado em 7 olhos (20,6%). Glaucoma agudo por bloqueio pupilar foi encontrado em 1 paciente (2,9%). CONCLUSÕES: O alto número de complicações encontradas nestas cirurgias, que foram as primeiras de um grupo de 6 estagiários de córnea, mostra a longa curva de aprendizado para este procedimento cirúrgico. A orientação das primeiras cirurgias por cirurgiões mais experientes pode diminuir a curva de aprendizado e a taxa de complicações.


PURPOSE: To report early complications in endothelial keratoplasty performed by cornea fellows. METHODS: Retrospective study of endothelial keratoplasty performed by second-year cornea fellows. Described the early complications and its treatments. RESULTS: Thirty four endothelial keratoplasty were performed by cornea fellows, from July 2007 to August 2008. From this, 29 were Descemet stripping endothelial keratoplasty and 5 Descemet stripping automated endothelial keratoplasty; 14 combined with phacoemulsification and 1 with extracapsular cataract surgery. The main indication was Fuchs' dystrophy (18 cases), followed by bullous keratopathy (11 cases), primary failure after endothelial keratoplasty (4 cases) and congenital hereditary endothelial dystrophy (1 case). Main surgery complication was donor button detachment in 8 eyes (23.5%), followed by primary graft failure in 7 eyes (20.6%) and acute glaucoma after pupillary block in 1 eye (2.9%). CONCLUSIONS: The complication rate in this series, which were the first ever in a group of six cornea fellows, was high. This shows the steep learning curve for this surgical procedure. The assistance of an experienced surgeon could help to achieve a less steep learning curve with a lower complication rate.


Subject(s)
Humans , Descemet Stripping Endothelial Keratoplasty/adverse effects , Endothelium, Corneal/surgery , Fuchs' Endothelial Dystrophy/etiology , Postoperative Complications/epidemiology , Glaucoma/etiology , Learning Curve , Lens Implantation, Intraocular/methods , Phacoemulsification/methods , Pupil Disorders/etiology , Retrospective Studies , Refractive Surgical Procedures/methods
4.
Rev. cuba. oftalmol ; 25(2): 202-211, oct.-dic. 2012.
Article in Spanish | LILACS | ID: lil-657924

ABSTRACT

Métodos: se realizó un estudio observacional, descriptivo y prospectivo. El universo lo constituyó 15 pacientes (15 ojos) sometidos a cirugías de catarata y vítreo de forma simultánea. El estudio se efectúo en el Instituto Cubano de Oftalmología Ramón Pando Ferrer de enero a noviembre de 2010...


Methods: a prospective, descriptive and observational research was carried out in Ramón Pando Ferrer Cuban Institute of Ophthalmology from January to November 2010. The sample was made up of 15 eyes from 15 patients, who had undergone cataract surgery and vitrectomy simultaneously...


Subject(s)
Middle Aged , Endothelium, Corneal/surgery , Cataract Extraction/adverse effects , Microscopy, Electron/methods , Vitrectomy/methods , Epidemiology, Descriptive , Observational Studies as Topic , Prospective Studies
5.
Indian J Ophthalmol ; 2012 Jan; 60(1): 59-60
Article in English | IMSEAR | ID: sea-138792

ABSTRACT

A 20-year-old patient, diagnosed with posterior polymorphous corneal dystrophy, developed corneal edema for which he underwent Descemet membrane endothelial keratoplasty with a stromal rim (DMEK-S) in the right eye. No intra- or postoperative complications were noted. At the last follow-up 2 years and 9 months after the procedure, the best corrected visual acuity was 1.0 and endothelial cell density declined from 3533 cells/mm2 to 1012 cells/mm2. Despite the endothelial cell loss, DMEK-S appears to be a good alternative to other surgical techniques for the treatment of corneal endotheliopathies, and it may be of benefit to young patients.


Subject(s)
Adolescent , Corneal Stroma/pathology , Corneal Stroma/surgery , Descemet Membrane/surgery , Descemet Stripping Endothelial Keratoplasty/methods , Endothelium, Corneal/surgery , Follow-Up Studies , Fuchs' Endothelial Dystrophy/surgery , Humans , Male , Time Factors , Visual Acuity
6.
Indian J Ophthalmol ; 2012 Jan; 60(1): 35-40
Article in English | IMSEAR | ID: sea-138786

ABSTRACT

Purpose: To compare the status of corneal endothelium and central corneal thickness within the first four postoperative years after deep anterior lamellar keratoplasty (DALK) and penetrating keratoplasty (PK) in patients with keratoconus. Materials and Methods: Thirty-nine eyes (Group A) which had PK and 44 eyes (Group B) which had DALK for the treatment of keratoconus were included in this retrospective study. The endothelial cell density (ECD), the mean endothelial cell area and the coefficient of variation of cell area were assessed with a non-contact specular microscope, and the central corneal thickness (CCT) was measured with an ultrasound pachymeter. Results: Mean ECD loss rate at two years was 36.24% in Group A and 18.12% in Group B (P<0.001). Mean ECD loss rate at four years was 47.82% in Group A and 21.62% in Group B (P<0.001). Mean annual ECD loss rate was calculated 14.12% per year in Group A and 5.78% per year in Group B. In the PK group, increase in mean CCT was 15.60% in two years and 15.03% in four years, while in the DALK group, mean CCT increased by 8.05% in two years and 9.31% in four years. Conclusions: As the majority of ectatic disorders such as keratoconus occur in young people, long-term endothelial cell survival following treatment with keratoplasty is essential for the long-term visual ability. Our finding that corneal endothelial cell loss in the DALK group occurs at a slower rate than in the PK group suggests DALK as a safer alternative to PK in these selected patients.


Subject(s)
Adolescent , Adult , Endothelium, Corneal/pathology , Endothelium, Corneal/surgery , Follow-Up Studies , Graft Survival , Humans , Keratoconus/pathology , Keratoconus/surgery , Keratoplasty, Penetrating/methods , Middle Aged , Retrospective Studies , Time Factors , Treatment Outcome , Visual Acuity , Adolescent , Adult , Endothelium, Corneal/pathology , Endothelium, Corneal/surgery , Follow-Up Studies , Graft Survival , Humans , Keratoconus/pathology , Keratoconus/surgery , Keratoplasty, Penetrating/methods , Retrospective Studies , Time Factors , Treatment Outcome , Visual Acuity
7.
Indian J Ophthalmol ; 2012 Jan; 60(1): 23-28
Article in English | IMSEAR | ID: sea-138784

ABSTRACT

Purpose: To evaluate the safety, efficacy and potential risks of Artiflex foldable iris-fixated phakic intraocular lens (pIOL) implantation for the management of myopia. Materials and Methods: Seventy-eight eyes of 40 consecutive patients with a mean spherical refraction of –11.70 ± 3.77 diopters (D; range –5.50 to –17.5 D) were included in this prospective, noncomparative, interventional case series. Main parameters assessed were uncorrected visual acuity (UCVA), best-spectacle corrected visual acuity (BSCVA), corneal topography (Orbscan II, BauchandLomb, Rochester, NY, USA), manifest and cycloplegic refractive errors, endothelial cell density (ECD) and applanation tonometry. Results: After 2 years, BSCVA was 20/40 or better in 82% of the eyes and UCVA was 20/40 or better in 84% of the eyes. After 1 month, 1 year, and 2 years, 51.3% (37 of 72 eyes), 58.9% (46 of 78 eyes) and 76.0% (38 of 50 eyes) of eyes gained 1 line or more of BSCVA, respectively. Compared to preoperative values, the mean endothelial cell loss was 2.6% at 1 month, 4.9% at 1 year and 7.4% at 2 years. Pigmented or non-pigmented precipitates were observed in17 eyes (21.7%) which were treated with topical corticosteroids. At the second postoperative year, pigmented precipitates persisted in nine eyes. However, this was not associated with a loss of BSCVA. Conclusion: The implantation of Artiflex pIOL is an effective surgical option for the management of high myopia. The most common complication observed within 2 years of follow-up was accumulation of pigmented precipitates with no effect on the final BSCVA.


Subject(s)
Adult , Endothelium, Corneal/surgery , Follow-Up Studies , Humans , Iris/surgery , Male , Myopia/physiopathology , Myopia/surgery , Patient Satisfaction , Phakic Intraocular Lenses , Prospective Studies , Prosthesis Design , Refraction, Ocular , Treatment Outcome , Visual Acuity
8.
Arq. bras. oftalmol ; 73(6): 508-510, nov.-dez. 2010. ilus, tab
Article in English | LILACS | ID: lil-572214

ABSTRACT

Purpose: To compare the extent of corneal endothelial (CE) cell loss changes in two groups of eyes submitted to phacoemulsification, with the conventional bevel-up tip position in one eye and with the bevel-down tip position in the fellow eye. Methods: This prospective clinical trial comprised 25 patients with bilateral cataracts subjected to lens removal by phacoemulsification with the conventional bevel-up tip position (GI) in one eye and with the bevel-down tip position (GII) in the fellow eye. The nuclei were graded clinically on the basis of hardness. The endothelial cell count (ECC) was evaluated preoperatively and 1, 3 and 6 months postoperatively. Total surgical time, effective ultrasound time and complications were also compared between the groups. Statistical analysis was performed by the Tukey Studentized Range test, with repeated measures for the selected periods. For the other parameters a paired t test was used. Data are presented as mean ± SD, with the level of significance set at p<0.05. Results: The mean effective ultrasound time was 8.08 ± 6.75 seconds in group I and 7.00 ± 5.75 seconds in GII (P=0.1792) and total surgical time was 10.01 ± 2.46 minutes in GI and 9.86 ± 2.17 minutes in GII (p=0.6267), respectively. The paired t test revealed no statistical differences between the groups. Complications were also similar between the groups. Mean endothelial cell count loss was 6.9 percent in GI and 2.8 percent in GII at one month; 6.9 percent in GI and 3.6 percent in GII at three months and 11.9 percent in GI and 7.6 percent in GII at six months postoperatively. Comparison of endothelial cell count (ECC) showed a statistically significant difference between the groups during the postoperative period. Conclusion: The conventional bevel-up tip position has a negative effect on corneal endothelial cells compared with the bevel-down position. Since the results of other surgical parameters were similar, the bevel-down tip position should be considered as an option in non-complicated phacoemulsification.


Objetivo: Comparamos duas técnicas de cirurgia de catarata. A técnica cirúrgica tradicional, em que direciona a abertura do bisel da ponteira de facoemulsificação para o endotélio corneano, com a técnica oposta, onde a reversão da posição de abertura permite o direcionamento da energia de emulsificação para o núcleo. Estudamos seus efeitos sobre a córnea e possíveis complicações. Métodos: O trabalho foi divido em quatro tempos: pré-operatório e após 30, 60 e 180 dias. Os pacientes foram divididos em dois grupos: o grupo 1, tratado com a técnica cirúrgica tradicional, com a abertura da ponteira direcionada para o endotélio, e grupo 2, que recebeu tratamento com técnica oposta, direcionada diretamente para o núcleo ou para os fragmentos nucleares. Após as cirurgias, foram estudados: perda endotelial após 30, 60 e 180 dias, tempo total de cirurgia e tempo efetivo de faco. Resultados: Os resultados intraoperatórios apresentaram o tempo efetivo de facoemulsificação no GI teve média de 8,08 segundos (DP=6,75) e no GII, média de 7,0 segundos (P=0,1792) e o tempo total de cirurgia de 10,01 ± 2,46 minutos no GI e 9,86 ± 2,17 minutos no GII (p=0,6267) respectivamente. O teste pareado não revelou diferença estatística entre os grupos. As complicações foram similares nos dois grupos. A média de perda de células endoteliais foi de 6,9 por cento no GI e2,8 por cento in GII com um mês; 6,9 por cento no GI e 3,6 por centonoGIIcom trêsmeses e 11,9 por cento no GI e 7,6 por cento no GII com seis meses de pós-operatório. Conclusão: Concluímos que a variação da manobra apresentada é segura e pode minimizar perdas no endotélio corneano, podendo ser uma opção na cirurgia da catarata, de acordo com as preferências pessoais do cirurgião.


Subject(s)
Aged , Aged, 80 and over , Humans , Middle Aged , Endothelium, Corneal/surgery , Phacoemulsification/methods , Cell Count , Follow-Up Studies , Postoperative Period , Prospective Studies , Phacoemulsification/adverse effects , Phacoemulsification/instrumentation , Time Factors , Treatment Outcome
9.
Rev. cuba. oftalmol ; 23(supl.1): 780-493, 2010.
Article in Spanish | LILACS | ID: lil-615585

ABSTRACT

OBJETIVO: Determinar la correlación entre la localización del lente intraocular en cámara posterior por biomicroscopia ultrasónica, diferentes parámetros quirúrgicos en pacientes operados de catarata. MÉTODOS: Se realizó un estudio descriptivo, prospectivo y transversal en el Instituto Cubano de Oftalmología Ramón Pando Ferrer durante el período de enero a junio del 2007. Se estudiaron variables como: edad, sexo, etiología de la catarata, técnica quirúrgica, localización del lente intraocular según biomicroscopia ultrasónica, así como complicaciones transoperatorias y posoperatorias. RESULTADOS: El 79 por ciento de todos los pacientes operados tenían entre 60 y 79 años de edad y algo más de la mitad correspondió al sexo femenino con un 59 por ciento. La catarata senil fue la etiología que predominó con un 74 por ciento y en el 68 por ciento de los casos el lente se localizó por biomicroscopia ultrasónica en el saco capsular. En los ojos donde el lente intraocular se localizó fuera del saco, la proporción de complicaciones transoperatorias y posoperatorias fueron significativamente mayoritarias, mientras que en los ojos donde el lente intraocular se encontraba en el saco, la mayoría no presentó complicaciones transoperatorias ni posoperatorias. CONCLUSIONES: Las diferencias entre las distintas localizaciones del lente intraocular se encontraron con significación estadística en el tipo de catarata, la presencia de complicaciones transoperatorias y posoperatorias, sin embargo, no se encontró relación estadística significativa entre la localización del lente intraocular con la técnica quirúrgica utilizada


OBJECTIVE: To determine the correlation between the location of the intraocular lens in the posterior chamber using ultrasonic biomicroscopy and the different surgical parameters in patients operated from cataract. METHODS: A prospective, descriptive and cross-sectional study was carried out in Ramón Pando Ferrer Cuban Institute of Ophthalmology in the period of January to June 2007. The studied variables were age, sex, etiology of cataracts, surgical technique, location of the intraocular lens using ultrasonic biomicroscopy, as well as transoperative and postoperative complications. RESULTS: Seventy nine percent of all the surgical patients were 60-79 years of age and 59 percent were females. The senile cataract was the prevailing etiology for 74 percent and the lens was located in the capsular sac using ultrasonic biomicroscopy in 68 percent of the cases. In those eyes where the intraocular lens was off the sac, the ratio of transoperative and postoperative complications was significantly higher, whereas most of the eyes with the IOL placed in the sac did not have either transoperative or postoperative complications. CONCLUSIONS: The differences between the different locations of the intraocular lens were statistically significant in terms of the type of cataract; however, there was not any significant statistical association between the location of the intraocular lens and the surgical technique


Subject(s)
Humans , Male , Female , Middle Aged , Anterior Chamber/surgery , Lens Capsule, Crystalline/physiopathology , Endothelium, Corneal/surgery , Cataract Extraction/methods , Lens Implantation, Intraocular/methods , Cross-Sectional Studies , Epidemiology, Descriptive , Prospective Studies
10.
Arq. bras. oftalmol ; 63(3): 235-9, jun. 2000.
Article in Portuguese | LILACS | ID: lil-268577

ABSTRACT

O aumento no volume de cirurgia de catarata na segunda metade do século XX proporcionou uma série de descobertas e melhoramentos tecnológicos nesta área, inclusive e importância do endotélio corneano. Por incrível que pareça, o conhecimento das funções endoteliais de barreira à entrada de fluídos e de bomba ativa de transporte de íons e água para fora do estroma corneano, foi desvendado somente a partir da década de 50, principalmente por estudos de Davson, Mishuma e Hebdy e Maurice. Até há pouco tempo (décadas de 80 e 90) a ceratopatia bolhosa pseudo-fácica era a principal causa de transplante penetrante de córnea nos Estados Unidos da América e Europa, devido ao relativo desconhecimento da importância do endotélio corneano na manutenção da transparência da córnea e ao grande uso de lentes intra-oculares inadequados após a cirurgia da catarata, especialmente as de câmara anterior com alças rígidas e as de fixação irianas.


Subject(s)
Humans , Adult , Endothelium, Corneal/anatomy & histology , Endothelium, Corneal/surgery , Cataract Extraction/methods , Phacoemulsification/methods , Ocular Hypertension/surgery , Ocular Hypertension , Lenses, Intraocular/statistics & numerical data
11.
Rev. oftalmol. venez ; 56(2): 6-16, jun. 2000. tab
Article in Spanish | LILACS | ID: lil-349116

ABSTRACT

La lidocaína intracamerular ha sido utilizada como complemento a la anestesia tópica en la cirugía de catarata. Este estudio analiza los efectos de la administración intracamerular de 0.2 ml de lidocaína sin preservativo sobre el endotelio corneal en conejos albinos de Nueva Zelanda. Se administró ringer lactato, lidocaína al 1,2 o 4 por ciento. Se estudia en forma seriada el grosor corneal, volumen y densidad celular por microscopia especular. No hubo diferencias estadísticamente significativas en el grosor corneal, tamaño, volumen y densidad celular a las 72 horas de la administración del anestésico al comparar las concentraciones del lidocaína al 1 y 2 por ciento con el grupo control. Se observó un incremento del tamaño, volumen y una disminución de la densidad celular en el grupo de lidocaína al 4 por ciento. A la microscopía electrónica, irregularidad de la membrana celular con disminución de los organelos y edema celular en los grupos de lidocaína al 2 y 4 por ciento, más acentuados en este último. Se concluye que la lidocaína al 1 por ciento libre de preservativo puede ser utilizada con seguridad en forma intracamerular como coadyuvante a la anestesia tópica


Subject(s)
Animals , Rabbits , Cataract , Endothelium, Corneal/surgery , Lidocaine/adverse effects , Ophthalmology , Venezuela
12.
Rev. bras. oftalmol ; 58(10): 771-6, out. 1999. ilus, tab, graf
Article in Portuguese | LILACS | ID: lil-280266

ABSTRACT

Objetivo: O objetivo do estudo foi observar a perda de células endotelias da área central da córnea (PCEC) em pacientes com catarata, submetidos à técnica de facoemulsificaçäo "Bowl Up/Down", com incisäo límbicatemporal tunelizada de 3mm comanestesia tópica e intra-ocular com Bupivacaina 0.75 por cento e comparar esses resultados com a perda endotelial em diferentes técnicas utilizadas na literatura.Local: Instituto de Oftalmologia Tadeu Cvintal - Säo Paulo.Método: Foram estudados, prospectivamente, 51 olhos de outubro de 1997 a setembro de 1998, e utilizada a microscopia especular de contato para a contagem das células endoteliais no pré e pós-operatório (1-3 meses e 3-6 meses).Resultados: Observamos uma perda endotelial de 9, 3 por cento no pós-operatório de 1-3 meses e de 11, 8 por cento no pós-operatório de 3-6 meses em relaçäo aos valores encontrados inicialmente no pós-operatório.Conclusäo: notamos que os valores obtidos säo semelhantes a algumas técnicas de facoemulsificaçäo encontradas na literatura e em outras os nossos resultados foram até melhores.Por isso, concluímos que a Bupivacaina 0.75 por cento, utilizada como anestésico tópico intracamerular, näo foi prejudicial ao endotélio corneano e que em curto e médio períodos de seguimento näo leva a uma perda endotelial maior que as encontradas por outros autores em outras técnicas, além do que a nova técnica tem a vantagem de ser realizada com uma só mäo.


Subject(s)
Humans , Male , Female , Cataract/pathology , Endothelium, Corneal/surgery , Cataract/complications
13.
Rev. bras. oftalmol ; 56(5): 351-353, maio 1997.
Article in Portuguese | LILACS | ID: lil-353786

ABSTRACT

O objetivo dos autores foi o de avaliar o endotélio corneano nos pacientes submetidos à vitrectomia pars plana com implante de óleo de silicone. Foram selecionados 11 olhos submetidos à cirurgia. Realizou-se microscopia especular no pré-operatório e no 3o. e 6o. mês pós-operatório. A perda de células endoteliais no pós-operatório é mostrada nos olhos fácicos e afácicos.


Subject(s)
Humans , Male , Female , Middle Aged , Endothelium, Corneal/surgery , Silicone Oils/pharmacology , Vitrectomy , Endothelium, Corneal/physiopathology
14.
New Egyptian Journal of Medicine [The]. 1994; 11 (3): 171-173
in English | IMEMR | ID: emr-34777

ABSTRACT

This study included 30 eyes of 22 patients. They underwent excimer photorefractive keratectomy for the correction of myopic errors ranging from -2.0 to 6.0 diopters [mean 4.8]. The corneal endothelium was studied preoperatively, 3 and 9 months after the procedure. There was no statistically significant difference between the endothelial cell count before the procedure and 3 or 9 months later. Also, there was no change in cell morphology. This proves that excimer laser photokeratectomy for correction of myopic errors up to -6.0 causes no endothelial cell damage


Subject(s)
Humans , Male , Female , Lasers, Excimer/methods , Endothelium, Corneal/surgery
15.
Rev. mex. oftalmol ; 67(1): 18-22, ene.-feb. 1993. tab
Article in Spanish | LILACS | ID: lil-124652

ABSTRACT

Se presentan los resultados y experiencias en 19 pacientes miopes (20 ojos) de -9.00 a -22.00 dioptrías; con una observación mínima que va de 6 meses a 2 años. Se describen los estudios y requisitos preoperatorios efectuados, la técnica quirúrgica empleada y los resultados obtenidos, señalando los controles empleados en el postoperatorio, así como complicaciones cuando las hubo. Se hace énfasis en lo seguro, predecible y sencillo del procedimiento.


Subject(s)
Humans , Male , Female , Lenses, Intraocular/instrumentation , Lenses, Intraocular/rehabilitation , Myopia/surgery , Myopia/rehabilitation , Endothelium, Corneal/surgery
SELECTION OF CITATIONS
SEARCH DETAIL