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PERFORMANCE ANALYSIS OF ULTRAHIGH-SPEED VITREOUS CUTTER SYSTEM

2013; Lippincott Williams & Wilkins; Volume: 33; Issue: 5 Linguagem: Inglês

10.1097/iae.0b013e31826f069e

1539-2864

Ramiro Ribeiro, Anderson Teixeira, Bruno Diniz, Rodrigo Brant, Yuxiang Zhong, R. Kerns, Mark S. Humayun,

Vascular Malformations Diagnosis and Treatment

To evaluate flow rates and duty cycle for different sizes of ultra-high-speed pneumatic vitreous cutters.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. Twenty-, 23- and 25-gauge (n = 3 of each gauge) pneumatic cutters were tested at 0 (water), 1,000, 2,000, 3,000, 4,000, and 5,000 cuts per minute with aspiration levels of 100, 200, 300, 400, 500, and 600 mmHg. Frame-by-frame analysis of high-speed video was used to determine the duty cycle.Larger gauge cutters associated with higher aspiration levels produced greater vitreous and water flow rates (P < 0.05). As the cut rate increased, the vitreous flow rate increased (maximum flow at 5,000 cuts per minute) and the water flow rate decreased (P < 0.05). The duty cycle of the new-generation cutters decreased as cut speeds increased, using all 3 gauges (P < 0.001). Vitreous flow rates averaged 10 times less than water flow rates using the same cutter at the same settings.Ultra-high-speed vitreous cutters produce consistent vitreous and water flow rates across the tested range of cuts per minute and aspiration levels.