SYSTEMS AND METHODS FOR TRANSVERSE PHACOEMULSIFICATION

• US 20100069828A1
• Filed: 10/07/2009
• Published: 03/18/2010
• Est. Priority Date: 05/24/2007
• Status: Active Grant

• Current Assignee: Johnson & Johnson Surgical Vision, Inc. (Johnson & Johnson)
• Original Assignee: Abbott Medical Optics Incorporated (Johnson & Johnson)
• Inventors: Steen, Mark E., Muri, John I., Broomfield, George, Raney, Rob
• Granted Patent: US 10,478,336 B2
• Time in Patent Office: Days
• US Class Current: 604/22
• CPC Class Codes: A61B 2017/320098 with transverse or torsional motion
• CPC Class Codes: A61F 9/00745 using mechanical vibrations, e.g. ultrasonic

Abstract

The invention is generally directed to phacoemulsification handpiece for providing transverse phacoemulsification. In accordance with one embodiment, a phacoemulsification handpiece is provided having a needle, wherein the handpiece is configured to vibrate the distal end of the needle in a transverse direction power is applied to the handpiece.

Claims

1. A handpiece for phacoemulsification, comprising:

a needle, wherein the needle has a distal end and a proximal end, wherein the distal end of the needle is configured to vibrate in at least a transverse direction when power is applied to the handpiece; and

a horn, wherein the horn has a distal end configured to engage the proximal end of the needle and wherein the horn has one or more notches distributed around an outer surface of the horn.

2. The handpiece of claim 1, wherein the at least one of the one or more notches is substantially asymmetric.

3. The handpiece of claim 2, wherein there is a single notch on a single side of the horn.

4. The handpiece of claim 1, wherein a distance between the distal end of the horn and the one or more notches is approximately 1.635 inches.

5. The handpiece of claim 1, wherein at least one notch has a length of about 0.1875 inches.

6. The handpiece of claim 1, wherein at least one notch has a core diameter of about 0.155 inches.

7. The handpiece of claim 1, further comprising one or more piezoelectric rings, wherein the one or more piezoelectric rings are coupled with the proximal end of the horn.

8. The handpiece of claim 7, wherein the horn and the one or more piezoelectric rings define a lumen, wherein the lumen is off-set from a central longitudinal axis of the horn.

9. The handpiece of claim 8, wherein the one or more piezoelectric rings are in a stacked formation, wherein the one or more piezoelectric rings in the stacked formation are staggered.

10. The handpiece of claim 1, wherein the handpiece is configured to operate at a frequency between 20 kHz and 40 kHz.

11. The handpiece of claim 10, wherein the frequency is between 20 kHz and 30 kHz.

12. The hand piece of claim 10, wherein the frequency is between 30 kHz and 40 kHz.

13. The handpiece of claim 1, wherein at least one notch is configured and dimensioned to create transversal vibration at the distal end of the needle between 26 kHz and 38 kHz.

14. The handpiece of claim 13, wherein the transversal node is at about 28 kHz.

15. The handpiece of claim 1, wherein at least one notch is configured and dimensioned to create a transversal node that is a resonant frequency.

16. A handpiece for phacoemulsification, comprising:

a needle having a distal end, wherein the distal end of the needle is configured to vibrate in a transverse direction when power is applied to the handpiece.

17. The handpiece of claim 16, wherein the power is a single effective operation frequency.

18. The handpiece of claim 16, wherein the needle is substantially straight and has a center of mass that is offset from a longitudinal axis of the needle.

19. The handpiece of claim 16, wherein the needle further comprises a needle base, wherein the needle base is substantially asymmetric.

20. The handpiece of claim 16, wherein the needle further comprises a needle base, wherein the needle base is substantially asymmetric and wherein the needle is substantially straight.

21. The handpiece of claim 19, wherein the needle base has an asymmetric configuration along a longitudinal axis of the needle.

22. The handpiece of claim 19, wherein the needle base has a substantially flattened side along a longitudinal axis of the needle.

23. The handpiece of claim 19, wherein a cross-section of the needle base along a longitudinal axis of the needle has a substantially crescent shape.

24. The handpiece of claim 19, wherein a cross-section of the needle base has a lumen offset from a center line of a longitudinal axis of the needle.

25. The handpiece of claim 16, wherein the needle further comprises an interface adaptor, wherein the interface adaptor is off-center from a center line of a longitudinal axis of the needle.

26. The handpiece of claim 16, wherein the needle further comprises an interface adaptor, wherein the interface adaptor is concentric with a lumen of the needle and off-center with respect to a center line of the lumen along a longitudinal axis of the needle.

27. The handpiece of claim 16, wherein the needle comprises a lumen and an outside wall that is parallel with the longitudinal axis of the needle, and wherein the lumen is angled with respect to the longitudinal axis of the needle.