Fluidics cassette for ocular surgical system

Patent metadata

Field	Value
Publication number	US-9522221-B2
Application number	US-93745607-A
Country	US
Kind code	B2
Filing date	Nov 8, 2007
Priority date	Nov 9, 2006
Publication date	Dec 20, 2016
Grant date	Dec 20, 2016

Abstract

An eye treatment cassette includes a handpiece, a vacuum source, a holding tank, a collection bag, and a displacement-based pump. The handpiece is configured to aspirate fluids from a patient's eye. The vacuum source communicates with the handpiece. The holding tank is interposed between the handpiece and the vacuum source, and is configured to hold the aspirated fluids. The collection bag is connected to the holding tank for collecting the aspirated fluids. The pump is coupled to the holding tank and is configured to operate while the vacuum source continues to aspirate fluids via the handpiece to drain the aspirated fluids from the holding tank.

First claim

What is claimed is:

1. A method for venting a handpiece of an eye treatment cassette, comprising:
operating the eye treatment cassette such that a vacuum is induced at the handpiece by a vacuum source fluidly connected to the handpiece and a holding tank;
venting the handpiece by closing a valve
interposed between the vacuum source and the handpiece to push fluid toward the handpiece; and
operating a volumetric pump to increase pressure in the handpiece.

2. The method of claim 1 , wherein operating the volumetric pump to increase the pressure in the handpiece comprises operating the volumetric pump in a reverse direction.

3. The method of claim 1 , wherein operating the volumetric pump to increase the pressure in the handpiece comprises operating the volumetric pump in a reverse direction, wherein a forward direction the volumetric pump provides aspiration via the handpiece.

4. The method of claim 1 , wherein the valve is a variable restrictor valve.

5. The method of claim 1 , wherein the volumetric pump is a displacement pump.

6. A method for draining aspirated fluids collected in a holding tank of an eye treatment cassette, comprising:
operating a vacuum source connected to a handpiece via the holding tank, wherein the vacuum source and the handpiece are fluidly connected by a single valve; and
operating a displacement-based pump fluidly connected between the holding tank and a collection bag to drain the aspirated fluids from the holding tank while continuing operation of the vacuum source connected to the handpiece.

7. An eye treatment cassette, comprising:
a handpiece configured to aspirate fluids from an eye;
a vacuum source communicating with the handpiece;
a holding tank interposed between the handpiece and the vacuum source configured to hold the aspirated fluids, wherein the handpiece and the vacuum source are fluidly connected by a single valve;
a collection bag connected to the holding tank for collecting the aspirated fluids; and
a displacement-based pump fluidly coupled between the holding tank and the collection bag, and configured to operate while the vacuum source continues to aspirate fluids via the handpiece to drain the aspirated fluids from the holding tank.

8. The cassette of claim 7 , further comprising a second displacement-based pump fluidly coupled between the handpiece and the holding tank.

9. The cassette of claim 8 , wherein the second displacement-based pump is configured to provide aspiration via the handpiece when operated in a forward direction and is configured to vent the handpiece when operated in a reverse direction.

10. The cassette of claim 9 , wherein the second displacement-based pump is configured to act as a pinch valve when not operating to vent or aspirate the handpiece.

11. The cassette of claim 8 , wherein the second displacement-based pump comprises a peristaltic pump.

12. An eye treatment cassette, comprising:
a handpiece configured to aspirate fluids from an eye;
a vacuum source communicating with the handpiece;
a holding tank interposed between the handpiece and the vacuum source configured to hold the aspirated fluids;
a collection bag connected to the holding tank for collecting the aspirated fluids;
a displacement-based pump fluidly coupled between the holding tank and the collection bag, and configured to operate while the vacuum source continues to aspirate fluids via the handpiece to drain the aspirated fluids from the holding tank; and
a second displacement-based pump fluidly coupled between the handpiece and the holding tank.

13. The cassette of claim 12 , further comprising a second displacement-based pump fluidly coupled between the handpiece and the holding tank.

14. The cassette of claim 13 , wherein the second displacement-based pump is configured to provide aspiration via the handpiece when operated in a forward direction and is configured to vent the handpiece when operated in a reverse direction.

15. The cassette of claim 14 , wherein the second displacement-based pump is configured to act as a pinch valve when not operating to vent or aspirate the handpiece.

16. The cassette of claim 13 , wherein the second displacement-based pump comprises a peristaltic pump.

Assignees

• Muri John I
• Edwards Craig
• Abbott Medical Optics Inc

Inventors

• Muri John I
• Edwards Craig

Classifications

• A61M3/0201

  Cassettes therefor · CPC title

• A61M1/72

  Cassettes forming partially or totally the fluid circuit · CPC title

• A61M1/77 Primary

  Suction-irrigation systems (aspiration tips supplying fluids A61M1/85; specific for negative pressure wound therapy A61M1/92; combined with tracheal tubes A61M16/0463) · CPC title

• A61F9/00745

  using mechanical vibrations, e.g. ultrasonic · CPC title

• A61M2205/3331

  Pressure; Flow · CPC title