Fluid pressure sensing chamber

• US 20070098579A1
• Filed: 10/05/2006
• Published: 05/03/2007
• Est. Priority Date: 10/27/2005
• Status: Abandoned Application

• Current Assignee: Alcon Incorporated
• Original Assignee: Alcon Incorporated
• Inventors: Boukhny, Mikhail, Sorensen, Gary, Morgan, Michael, Liao, Grace, Oliveira, Mel
• Application Number:
  US11/543,715
• Publication Number:
  US 20070098579A1
• Time in Patent Office: Days
• US Class Current: 417/477.2
• CPC Class Codes: A61M 1/72 Cassettes forming partially or totally the fluid circuit
• CPC Class Codes: A61M 1/73 comprising sensors or indicators for physical values
• CPC Class Codes: A61M 1/74 Suction control underwater drainage A61M1/61
• CPC Class Codes: A61M 2205/12 with interchangeable cassettes forming partially or totally the fluid circuit
• CPC Class Codes: A61M 2210/0612 Eyes
• CPC Class Codes: F04B 2205/05 Pressure after the pump outlet
• CPC Class Codes: F04B 43/12 having peristaltic action

Abstract

A pressure sensing chamber having a canted 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.

Claims

1. A cassette, comprising:

a) a body having a vertical centerline;

b) a pressure sensing chamber formed in the body; and

c) a tubing extension extending through the pressure sensing chamber, the tubing extension being canted relative to the vertical centerline.

2. The cassette of claim 1 wherein the pressure sensing chamber comprises a hollow void formed in the body enclosed by a pressure sensing diaphragm.

3. The cassette of claim 1 wherein the cassette further comprises a peristaltic pump, the tubing extension fluidly communicating with the peristaltic pump.

4. The cassette of claim 1 wherein the tubing extension is canted at an angle of between 5°

and 45°

.

5. The cassette of claim 1 wherein the tubing extension is integrally formed in the body.

6. The cassette of claim 1 further comprising an aspiration tubing connected to the cassette and the tubing extension is formed as a part of the aspiration tubing.

7. The cassette of claim 3 further comprising an aspiration tubing connected to the cassette and in fluid communication with the peristaltic pump and the tubing extension is formed as a part of the aspiration tubing.

8. The cassette of claim 1 wherein the tubing extension is canted at an angle of between 10°

and 20°

.

9. A cassette, comprising:

a) a body having a vertical centerline;

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 being canted relative to the vertical centerline and having a reduced diameter portion and a plurality of holes that fluidly communicate with the pressure sensing chamber.

10. The cassette of claim 9 wherein the cassette further comprises a peristaltic pump, the tubing extension fluidly communicating with the peristaltic pump.

11. The cassette of claim 9 wherein the holes are between approximately 0.0002 square inches to 0.02 square inches in area.

12. The cassette of claim 9 further comprising an aspiration tubing connected to the cassette.

13. The cassette of claim 10 further comprising an aspiration tubing connected to the cassette and in fluid communication with the peristaltic pump.

14. The cassette of claim 9 wherein the holes are sized and shaped so that any air bubbles entering the tubing extension does not enter the pressure sensing chamber.

15. A surgical system, comprising:

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 having a vertical centerline;

ii) a pressure sensing chamber formed in the body; and

iii) a tubing extension extending through the pressure sensing chamber, the tubing extension being canted relative to the vertical centerline.

16. The surgical system of claim 15 wherein the pressure sensing chamber comprises a hollow void formed in the body enclosed by a pressure sensing diaphragm.

17. The surgical system of claim 15 wherein the cassette further comprises a peristaltic pump, the tubing extension fluidly communicating with the peristaltic pump.

18. The surgical system of claim 15 wherein the tubing extension is canted at an angle of between 5°

and 45°

.

19. The surgical system of claim 15 wherein the tubing extension is integrally formed in the body.

20. The surgical system of claim 15 further comprising an aspiration tubing connected to the cassette and the tubing extension is formed as a part of the aspiration tubing.

21. The surgical system of claim 17 further comprising an aspiration tubing connected to the cassette and in fluid communication with the peristaltic pump and the tubing extension is formed as a part of the aspiration tubing.

22. The surgical system of claim 15 wherein the tubing extension is canted at an angle of between 10°

and 20°

.