Patent ID: 8241242

Claim:
A device for achieving high vacuum stability during eye surgery, said device comprising: a main aspiration line connected to a vacuum source and configured to enable a fluid flow from a surgical handpiece to a drainage reservoir; a first tubing segment disposed in fluid communication with said main aspiration line, said first tubing segment having a lumen and a bore restriction inside a portion of said lumen of said first tubing segment, wherein said bore restriction has a cross sectional flow area less than a cross sectional flow area of said lumen when said first tubing segment is fully open and uncollapsed; a second tubing segment disposed in fluid communication with said main aspiration line and substantially parallel to said first tubing segment, the said second tubing segment having a cross sectional flow area larger than said a-cross sectional flow area of the said bore restriction when said second tubing segment is fully open and uncollapsed; and a valve, disposed adjacent to said second tubing segment, and configured to control fluid flow through the said first and second tubing segments by deforming said second tubing segment to limit vacuum surge in the said main aspiration line upon clearing of an occlusion in the surgical handpiece.