PHACOEMULSIFICATION HAND PIECE WITH INTEGRATED ASPIRATION AND IRRIGATION PUMP

• US 20140163455A1
• Filed: 10/10/2013
• Published: 06/12/2014
• Est. Priority Date: 12/11/2012
• Status: Active Grant

• Current Assignee: Alcon Incorporated
• Original Assignee: Alcon Research Limited (Nestle SA)
• Inventors: WILSON, DANIEL J., CHANDRAKANT, PARTHA
• Granted Patent: US 9,445,943 B2
• Time in Patent Office: Days
• US Class Current: 604/22
• CPC Class Codes: A61B 2017/00973 pedal-operated
• CPC Class Codes: A61B 2218/002 Irrigation
• CPC Class Codes: A61B 2218/007 Aspiration
• CPC Class Codes: A61F 9/00745 using mechanical vibrations, e.g. ultrasonic
• CPC Class Codes: A61M 1/743 by changing the cross-section of the line, e.g. flow regulating valves A61M1/7413 takes precedence
• CPC Class Codes: A61M 1/774 Handpieces specially adapted for providing suction as well as irrigation, either simultaneously or independently
• CPC Class Codes: A61M 2205/3303 Using a biosensor
• CPC Class Codes: A61M 2205/3337 Controlling, regulating pressure or flow by means of a valve by-passing a pump
• CPC Class Codes: A61M 2205/3344 Measuring or controlling pressure at the body treatment site
• CPC Class Codes: A61M 2205/50 with microprocessors or computers
• CPC Class Codes: A61M 2210/0612 Eyes
• CPC Class Codes: A61M 3/0201 Cassettes therefor
• CPC Class Codes: A61M 3/0202 with electronic control means or interfaces

Abstract

A method of irrigating a surgical site and aspirating fluid from the surgical site. The method includes directing a fluid through an aspiration conduit in a phacoemulsification hand piece using a vacuum pressure created from a pump in the hand piece interfacing with the aspiration conduit and directing an irrigation fluid through an irrigation conduit in the hand piece using a pressure created from the pump interfacing with the irrigation conduit. The method also includes increasing an irrigation fluid flow through the irrigation conduit by activating the pump in the hand piece, detecting a pressure associated with a surgical site using a sensor, and controlling intraocular pressure (IOP) by adjusting the pump speed based on the detected pressure.

Claims

1. A phacoemulsification hand piece comprising:

a body having a distal end and a proximal end;

an ultrasonic tip disposed at the distal end of the body and configured to aspirate an aspiration fluid from a surgical site;

a sleeve disposed at the distal end of the body configured to irrigate the surgical site with an irrigation fluid;

a removable cartridge disposed in the body and in fluid communication with the ultrasonic tip and the sleeve, wherein the cartridge comprises;

an aspiration conduit configured to contain the aspiration fluid; and

an irrigation conduit configured to contain the irrigation fluid; and

a pump disposed within the body and interfacing with the aspiration conduit and with the irrigation conduit, such that upon activation of the pump, the irrigation fluid within the irrigation conduit flows in a direction towards the sleeve and away from the proximal end, and the aspiration fluid within the aspiration conduit flows in a direction away from the tip and towards the proximal end.

2. The hand piece of claim 1, further comprising a valve disposed within the body and configured to interface with the aspiration conduit, the valve configured to control a flow rate of aspiration fluid within the aspiration conduit.

3. The hand piece of claim 2, further comprising a sensor disposed within the body and configured to detect a flow rate or a pressure representative of pressure at the surgical site.

4. The hand piece of claim 3, wherein the sensor is located within the hand piece along the irrigation conduit, along the aspiration conduit, or near the distal end of the hand piece body.

5. The hand piece of claim 3, further comprising a controller in communication with the pump, the valve, and the sensor, wherein the controller controls the pump and the valve based on information received from the sensor.

6. The hand piece of claim 1, wherein the pump is a peristaltic pump.

7. The hand piece of claim 2, wherein the valve is located between the pump and the tip.

8. The hand piece of claim 2, wherein the valve is located between the pump and a drain reservoir of aspiration fluid, the drain reservoir in fluid communication with the aspiration conduit.

9. The hand piece of claim 1, wherein the irrigation conduit comprises a first cross-sectional area and the aspiration conduit comprises a second cross-sectional area, the first cross-sectional area being larger than the second cross-sectional area.

10. The hand piece of claim 1, wherein the body forms an opening to receive the cartridge.

11. A method of irrigating a surgical site and aspirating fluid from the surgical site, comprising:

directing a fluid through an aspiration conduit in a phacoemulsification hand piece using a vacuum pressure created from a pump in the hand piece interfacing with the aspiration conduit;

directing an irrigation fluid through an irrigation conduit in the hand piece using a pressure created from the pump interfacing with the irrigation conduit;

increasing an irrigation fluid flow through the irrigation conduit by activating the pump in the hand piece;

detecting a pressure associated with a surgical site using a sensor; and

controlling intraocular pressure (IOP) by adjusting the state of an aspiration valve based on the detected pressure.

12. The method of claim 11, further comprising controlling IOP by adjusting a pump speed based on the pressure.

13. The method of claim 11, wherein the sensor is located within the hand piece along the irrigation conduit or along the aspiration conduit or both.

14. The method of claim 11, wherein controlling the IOP by adjusting the state of the aspiration valve comprises:

determining, based on the detected pressure, if the aspiration flow should be increased or decreased;

increasing the aspiration flow using the aspiration valve if the aspiration flow should be increased; and

decreasing the aspiration flow using the aspiration valve if the aspiration flow should be decreased.

15. The method of claim 12, wherein the aspiration valve is located between the pump and the surgical site.

16. The method of claim 12, wherein the aspiration valve is located between the pump and a drain reservoir of the aspiration fluid.

17. The method of claim 12, further comprising:

communicating the detected pressure associated with a surgical site to a controller;

controlling the operation of the pump with the controller; and

controlling the operation of the aspiration valve with the controller.

18. The method claim 11, wherein the irrigation conduit comprises a first cross-sectional area and the aspiration conduit comprises a second cross-sectional area, the first cross-sectional area being larger than the second cross-sectional area.

19. An aspiration and irrigation system for irrigating the eye and aspirating fluid from the eye during an ocular surgery comprising:

a phacoemulsification hand piece comprising;

a graspable body having a distal end and a proximal end;

an aspiration conduit configured to transport an aspiration fluid away from a surgical site;

an irrigation conduit configured to transport an irrigation fluid towards the surgical site;

a pump disposed within the hand piece, wherein at least a portion of the pump interfaces with the aspiration conduit and the irrigation conduit, such that upon activation of the pump, the irrigation fluid within the irrigation conduit flows in a direction towards the surgical site, and the aspiration fluid within the aspiration conduit flows in a direction away from the surgical site;

a valve disposed within the hand piece configured to interface with the aspiration conduit, the valve configured to control a flow rate of aspiration fluid within the aspiration conduit; and

a sensor detecting pressure representative of a surgical site pressure; and

a controller in communication with the pump, the valve, and the sensor,

wherein the controller is configured to control the operation of the pump and the valve based on information from the sensor; and

wherein the controller is configured to change intraocular pressure (IOP) at the surgical site.

20. The system of claim 19, wherein the controller is configured to change IOP by adjusting the pump speed or by adjusting the state of the valve or both.

21. The system of claim 19, wherein the valve is located between the pump and a tip located at the distal end.

22. The system of claim 19, wherein the valve is located between the pump and a drain reservoir of the aspiration fluid.

23. The method of claim 19, wherein the sensor is located within the hand piece along the irrigation conduit or along the aspiration conduit or both.

24. The system of claim 19, wherein the irrigation conduit comprises a first cross-sectional area and the aspiration conduit comprises a second cross-sectional area, the first cross-sectional area being larger than the second cross-sectional area.

25. The system of claim 19, wherein the hand piece further comprises:

a removable cartridge disposed in the body having at least a portion of the aspiration conduit and at least a portion of the irrigation conduit.

26. The system of claim 19, comprising a second controlled valve controlling flow through a line connecting the irrigation line to the aspiration line to facilitate IOP control.