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    New blade design allows higher flow, greater cut rates

    With a duty cycle of 100% and dual cuts, tool shows promise for vitrectomy procedures

    Take-home message: A modified vitreous cutter blade design has been found to allow surgeons a much higher flow while doubling cute rate.


    Genoa, Italy—A modified vitreous cutter blade design allows the amount of open-port surface to remain constant throughout the duty cycle, thereby giving surgeons a much higher flow while doubling the cut rate, said Tommasso Rossi, MD.

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    Typical blades have asynchronous suction and cutting action that may result in limited efficiency and create issues with retinal traction, said Dr. Rossi, director of ophthalmology, San Martino Hospital, Genoa, Italy.

    The new design “will increase safety and efficacy, especially with small gauge probes,” he said.

    The device (Constant Flow Blade) is commercially available in Europe, and “differs from all guillotine blades so far used in vitreous cutters in that it does not completely occlude the cutting port,” he said.

    The duty cycle is, therefore, at 100% “since the open surface available for suction is invariant throughout the duty cycle and the blade has a double bevel that cuts vitreous on both sided of the port during its cutting cycle,” he said.

    The modified design allows for two cuts—one distal and one proximal—during each of the cutting cycles (Figure 1).

    Further, the cutter can be used in any type of vitrectomy surgery, including pucker, macular hole, and retinal detachment cases.

    Next: Study details


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