Aspiration flow resistor
AssigneeBausch & Lomb Incorporated
InventorsLaurence J. Cull, James T. Perkins, Matthew J. Fitzgerald
Life of this patent
Estimating the term…
Abstract
An aspiration flow resistor 10 includes an inlet 12 and an outlet 14. A housing 16 is connected to the inlet 12 and outlet 14. A series of spaced walls 18 are disposed between the inlet 12 and the outlet 14. The walls 18 and the inlet 12 and the outlet 14 together with the housing 16 define a plurality of aspiration flow chambers 22. As aspirant flows from the inlet 12 to the outlet 14, a pressure decrease in the aspirant flow occurs at each wall 18 to provide resistance to aspirant flow.
Claims12
An aspiration flow resistor comprising:
- an inlet and an outlet;
- a housing connected to the inlet and outlet
- a series of spaced walls disposed between the inlet and outlet, wherein each wall has at least one orifice for allowing aspirant to follow through the wall;
- wherein the walls and the inlet and outlet together with the housing define a plurality of aspiration flow chambers such that as aspirant flows from the inlet to the outlet a pressure decrease in the aspirant flow occurs at each wall and therefore provides resistance to aspirant flow.
An ophthalmic surgery system comprising:
- a surgical control console;
- an irrigation device;
- a surgical instrument for performing an surgical operation on an eye and connected to the irrigation device and the instrument is controlled by the console;
- an aspiration device connected to the surgical instrument for aspirating fluid and tissue from the eye to a collection cassette associated with the aspiration device;
- and
- an aspiration flow resistor connected between the aspiration device and the surgical instrument wherein the resistor includes:
- an inlet and an outlet;
- a housing connected to the inlet and outlet;
- a series of spaced walls disposed between the inlet and outlet, wherein each wall has at least one orifice for allowing aspirant to follow through the wall;
- wherein the walls and the inlet and outlet together with the housing define a plurality of aspiration flow chambers such that as aspirant flows from the inlet to the outlet a pressure decrease in the aspirant flow occurs at each wall and therefore provides resistance to aspirant flow.
An aspiration flow resistor comprising:
- an inlet and an outlet;
- an elongated housing connected between the inlet and the outlet;
- a series of spaced rings contained within the housing;
- wherein a plurality of aspiration flow chambers are formed such that as aspirant flows from the inlet to the outlet and through each ring, pressure decrease in the aspirant flow occurs at each ring and therefore provides resistance to aspirant flow.
Dependencies are inferred from the claim text.