Publications by authors named "Rodrigo B Fernandes"

Background And Objective: To investigate whether the confocal near-infrared reflectance (NIR) imaging modality could detect the in vivo presence of retinal pigment epithelium cells derived from embryonic human stem cells (hESC-RPE) implanted into the subretinal space of the Royal College of Surgeons (RCS) rat.

Materials And Methods: Monthly NIR images were obtained from RCS rats implanted with either hESC-RPE seeded on a parylene membrane (n = 14) or parylene membrane without cells (n = 14). Two independent, masked investigators graded the images.

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Purpose: The purpose of the study was to determine the performance of dual pneumatic ultra high-speed 23-gauge cutters operated with variable duty cycle (DC) settings.

Methods: Frame-by-frame analysis of high-speed video was used to determine the DC in core, 50-50, and shave modes. Using three cutters at various cycles per minute and aspiration levels, mass of water or vitreous removed from a vial was measured within a specified time period.

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Purpose: To evaluate flow rates and duty cycle for different sizes of ultra-high-speed pneumatic vitreous cutters.

Methods: A precision balance measured the mass of water and vitreous removed from a vial. Porcine vitreous was obtained within 12 hours of killed at a local slaughterhouse and kept at 4 °C.

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Background: Dual pneumatic systems use two separate air line tubes to open and close the cutter and can achieve high cut rates. The purpose of this study is to evaluate the influence of gauge size, cut rate and aspiration on the flow rate performance of ultra high-speed cutters operated with a commercially available dual pneumatic vitrectomy system.

Methods: Analysis of a high-speed video was used to determine duty cycle.

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