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Three Monthly Ranibizumab for ME Secondary to BRVO: 12-month Outcomes

Purpose: To assess 12-month efficacy of the three monthly intravitreal injections of ranibizumab for the treatment of macular oedema (MO) secondary to branch retinal vein occlusion (BRVO) in comparison with combined treatment (a single intravitreal injection of ranibizumab followed by grid laser treatment). Methods: Subjects were 19 patients (19 eyes) with unilateral vision loss attributable to macular oedema following BRVO. Duration of the...

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Flow Control Vitrectomy : Ratio Risk-benefit with Current Pumps

The individualized evaluation of the ratio benefit-risk is defined by the maximal gel amount that can be effectively aspirated in the minimal amount of time (the “benefit”), without iatrogenic browsing of the retina or the ciliary epithelium (the “risk”). For a given vitrectomy machine, the aspiration flow of the vitreous (a viscoplastic medium not susceptible to distortion) varies inversely with its viscosity (Poiseuille law of...

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Stellaris PC: A Ventury Pump for Fellows in Training

The Stellaris PC is a ventury pump vitrectomy machine. As you know, the control of the vacuum is the main parameter of the setting available in the software. The new interface gives you the opportunity to optimize and increase the security during the procedures. Purpose: The communication aims to explain how to use the different combinations to give the best sensations to the surgeon, well adapted to the way he manages the...

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Let’s Try to Understand

The EVRS RD study, analyzed by the French National Institute of Statistics, demonstrated that vitrectomy performed with a Venturi pump machine almost triples the failure rate compared to the use a flow-control pump, independently of the surgeon’s experience, age and nationality. Let’s try to explain why. Since a Venturi pump does not allow to control the quantity of liquid entering the hand piece, a low cutting speed cannot be used...

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Flow Controlled Vitrectomy and EVA – The Clinical Experience

Purpose: Much lively discussion continues regarding the effectiveness of conventional vitrectomy using a vacuum based system as compared to a flow based system. In the last year, a combination system with both vacuum and flow capabability, (EVA® DORC) was released for use in the United States. This new technology has allowed for a comparison of the two platforms using the same unit. In addition, this unit also has anterior segment...

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The Smaller, The Safer

Advantages: The use of 25ga+ and 27ga+ surgery with Constellation enables a more delicate and precise surgical manipulation on the retina surface, making vitrectomy safer. Methods: 1. The duty cycle (Core or Shave) and the fast cutting rate (5000 cpm)  are advantageous namely for beginners, however, it is mainly the smaller flow, thanks to the smaller gauge, which makes the surgery safer. 2. Both the vacuum and the flow can be precisely...

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