Apparatuses, systems, and methods are provided for rapid venting of vacuum to mitigate occlusion break surge within a phaco fluidics aspiration system. The aspiration system may utilize a positive displacement pump to generate flow and a vent valve to vent or moderate the pressure or vacuum level based on pressure sensor feedback detected within the eye and at the pump. Embodiments described herein provide a quick-opening vent valve that produces a quick-opening flow response upon angular rotation of the quick-opening vent valve. The flow performance at the quick-opening vent valve is improved by increasing the effective cross-sectional area of the valve at near-closed valve positions. In particular, the increase in the cross-sectional area is achieved by forming a concaving edge portion to complement a circular edge of and opening of a flow channel formed through the vent valve.本案提供用於使真空快速通氣以在超音波晶體乳化流體學抽吸系統內減緩堵塞破壞湧浪之設備、系統及方法。抽吸系統可基於在眼睛內及在泵處偵測到的壓力感測器反饋，利用正排量式泵來產生流量以及利用通氣閥來使壓力或真空水平通氣或減緩。本文所述實施例提供速啟通氣閥，該速啟通氣閥根據速啟通氣閥之角旋轉產生速啟流動響應。藉由在近乎閉合的閥位置處增大閥之有效截面面積來改良該速啟通氣閥處的流動效能。詳言之，藉由形成凹狀邊緣部分來達成橫截面積之增大以補充貫穿通氣閥形成的流動通道之環形邊緣與流動通道之開口。
