Patent ID: 9381113
Filing Date: 2016-07-05
CPC Classification: A61B,A61F,F04C

Claim Text:
1. A system for conducting a vitrectomy, comprising: a gas source; a vitrector including a cutting mechanism that opens and closes according to a pressure and a spring force at the vitrector; and a pulse-generating system receiving gas from the gas source and generating pulses at the vitrector, the pulses causing the pressure at the vitrector to vary according to a cycle, the varying pressure and a spring force at the vitrector causing the cutting mechanism of the vitrector to open and close, wherein, at a first time in the cycle, the pulse-generating system, generates a pulse and raises the pressure at the vitrector to a maximum pressure, to close the cutting mechanism, and at a second time in the cycle, the pulse-generating system reduces the pressure at the vitrector to a minimum pressure that is greater than ambient, the pressure at the vitrector being maintained at least at the minimum pressure and the spring force causing the cutting mechanism to open.