Michel Eid Farah, MD, PhD (São Paulo, Brazil), Octaviano Magalhães Jr., MD (São Paulo, Brazil), Mauricio Maia, MD (São Paulo, Brazil), André Maia, MD (São Paulo, Brazil), Paulo Augusto de Arruda Mello-Filho, MD (São Paulo, Brazil), Marcos P. Avila, MD (Goiania Go, Brazil)


To compare the infusion and extrusion fluid volumes from different 25-gauge vitrectomy systems.


Infusion and aspiration rates of different 25- gauge systems: Alcon (Dallas Forth Worth, TX); Bausch & Lomb (St. Louis, MO); and DORC (Netherlands) were measured “in vitro” using balanced saline solution (BSS) in different levels of infusion bottle height (40, 60, 80, 100, 120 centimeters) using different cutter velocities (cutter-off, 800 cuts/minute, 1100 cuts/minute, 1500cuts/minute) and aspiration power (100, 200, 300, 400, 500 mmHg).


All infusion flow velocities were different among all systems tested (p<0,001). The aspiration rates from Alcon and Bausch &  Lomb systems were lower than DORC system (p<0,001). The best “safe zone for vitrectomy” (SZFV) was obtained in Alcon system that may result in a “safer vitrectomy;” this should be a good system to be used in situations that require low traction and low “aspiration power” as retinal detachment in high myopic patients or vitreous shaving procedures.


The 25-gauge infusion and extrusion fluid rates from different vitrectomy systems were different. These results may be helpful to optimize the ideal parameters of aspiration and infusion among the 25-gauge vitrectomy systems in vitreoretinal diseases.