| 摘要 |
An eye treatment system for performing an ocular surgical procedure conta ins an eye treatment probe or handpiece, a treatment console, an eye treatme nt cassette, and a pump formed by the engagement of the treatment cassette w ith the treatment console. The handpiece is configured to provide at least i rrigation fluid to, and aspiration of fluid from, a subject eye. The treatme nt console comprises a controller configured to control the eye treatment pr obe. The eye treatment cassette engages the treatment console to couple the eye treatment probe with the treatment console. The pump comprises a pump he ad having a plurality of projections disposed to rotate about an axis, a ram p disposed near the rotating projections, and a resilient channel configured to transfer fluid when engaged by the ramp and the plurality of projections . The ramp is configured to reduce pressure fluctuations with the eye during a surgical procedure and comprises and entrance portion, a central portion, and an exit portion. The ramp is configured such that the arcuate extent of the entrance portion is unequal to the arcuate extent of the exit portion.< /SDOAB> |
