Fluid pressure sensing chamber
First Claim
Patent Images
1. A cassette, comprising:
- a) a body;
b) a pressure sensing chamber formed in the body; and
c) a tubing extension extending through the pressure sensing chamber, the tubing extension having a reduced diameter portion within the pressure sensing chamber, at least one hole in the reduced diameter portion that fluidly communicates with the pressure sensing chamber, and at least one other hole within the pressure sensing chamber outside of the reduced diameter portion.
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Accused Products
Abstract
A pressure sensing chamber having a tubing extension with a reduced diameter portion extending through the chamber. The tubing contains a plurality of ports so as to allow the purging of air from the chamber, but the ports are sized so that bubbles entering the tubing cannot easily flow into the chamber. The reduced diameter portion creates a pressure differential between the holes. This differential pressure creates flow through the chamber under high liquid flow and turbulent liquid flow events.
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Citations
16 Claims
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1. A cassette, comprising:
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a) a body; b) a pressure sensing chamber formed in the body; and c) a tubing extension extending through the pressure sensing chamber, the tubing extension having a reduced diameter portion within the pressure sensing chamber, at least one hole in the reduced diameter portion that fluidly communicates with the pressure sensing chamber, and at least one other hole within the pressure sensing chamber outside of the reduced diameter portion. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A cassette, comprising:
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a) a body; b) a pressure sensing chamber formed in the body the pressure sensing chamber being formed as a hollow void in the body enclosed by a pressure sensing diaphragm; and c) a tubing extension integrally formed in the body and extending through the pressure sensing chamber, the tubing extension having a reduced diameter portion within the pressure sensing chamber and a plurality of holes within the pressure sensing chamber that fluidly communicate with the pressure sensing chamber, the plurality of holes including at least one hole in the reduced diameter portion that fluidly communicates with the pressure sensing chamber and at least one other hole within the pressure sensing chamber outside of the reduced diameter portion. - View Dependent Claims (8, 9, 10)
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11. A surgical system, comprising:
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a) a surgical console having a cassette receiving portion; b) a surgical cassette received by the console in the cassette receiving portion, the cassette having i) a body; ii) a pressure sensing chamber formed in the body; and iii) a tubing extension extending through the pressure sensing chamber, the tubing extension having a reduced diameter portion within the pressure sensing chamber and a plurality of holes within the pressure sensing chamber that fluidly communicate with the pressure sensing chamber, the plurality of holes including at least one hole in the reduced diameter portion that fluidly communicates with the pressure sensing chamber and at least one other hole within the pressure sensing chamber outside of the reduced diameter portion. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification