Automatic control of phacoemulsification needle trajectory

Patent metadata

Field	Value
Publication number	US-12415028-B2
Application number	US-202217748091-A
Country	US
Kind code	B2
Filing date	May 19, 2022
Priority date	Aug 7, 2021
Publication date	Sep 16, 2025
Grant date	Sep 16, 2025

Abstract

A system and method that includes inserting a needle of a phacoemulsification handpiece into an eye of a patient and vibrating the needle in a first trajectory. Matter from the eye is aspirated via an aspiration line while the needle is vibrated in the first trajectory. An indication is received, of a vacuum level in the aspiration line. Determined is, that the vacuum level has changed by at least a preset vacuum level change, and in response vibrating the needle is switched to a second trajectory, different from the first trajectory.

First claim

The invention claimed is:

1. A method, comprising:
inserting a needle of a phacoemulsification handpiece into an eye of a patient, and vibrating the needle in a first trajectory;
aspirating matter from the eye via an aspiration line while the needle is vibrated in the first trajectory;
receiving an indication of a vacuum level in the aspiration line; and
determining that the vacuum level has changed by at least a preset vacuum level change, and in response switching to vibrate the needle in a second trajectory, different from the first trajectory;
wherein determining that the vacuum level has changed by at least a preset vacuum level change comprises determining that the vacuum level has changed by at least the preset vacuum level change during a time period less than or equal to a preset time period.

2. The method according to claim 1 , wherein the first trajectory comprises a longitudinal vibration, and the second trajectory comprises an elliptical vibration.

3. The method according to claim 1 , wherein switching to vibrate the needle in the second trajectory comprises vibrating the needle in the second trajectory for a predefined period of time.

4. The method according to claim 3 , further comprising returning to vibrating the needle in the first trajectory upon completion of the predefined period of time.

5. A system, comprising:
a needle of a phacoemulsification handpiece configured for insertion into an eye of a patient, and being vibrated in a first trajectory;
an aspiration line coupled with the needle and configured for aspiration of matter from the eye via the needle while the needle is vibrated in the first trajectory; and
a processor, which is configured to:
receive an indication of a vacuum level in the aspiration line; and
determine that the vacuum level has changed by at least a preset vacuum level change, and in response switching to vibrate the needle in a second trajectory, different from the first trajectory;
wherein the processor is configured to determine that the vacuum level has changed by determining that the vacuum level has changed by at least the preset vacuum level change during a time period less than or equal to a preset time period.

6. The system according to claim 5 , wherein the first trajectory comprises a longitudinal vibration, and the second trajectory comprises an elliptical vibration.

7. The system according to claim 5 , wherein the processor is configured to switch to vibrate the needle in the second trajectory by vibrating the needle in the second trajectory for a predefined period of time.

8. The system according to claim 7 , wherein the processor is further configured to return to vibrating the needle in the first trajectory upon completion of the predefined period of time.

9. The method according to claim 1 , wherein the first trajectory is a longitudinal trajectory and the second trajectory is an elliptical trajectory.

10. The system according to claim 5 , wherein the first trajectory is a longitudinal trajectory and the second trajectory is an elliptical trajectory.

Assignees

• Johnson & Johnson Surgical Vision Inc

Inventors

• Govari Assaf
• Beeckler Christopher Thomas
• Gliner Vadim
• Sitnitsky Ilya
• Fuchs Amit

Classifications

• G01R27/02

  Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant (by measuring phase angle only G01R25/00) · CPC title

• B06B2201/76

  Medical, dental · CPC title

• B06B1/0614 Primary

  for generating several frequencies · CPC title

• B06B1/0284

  with consecutive, i.e. sequential generation, e.g. with frequency sweep · CPC title

• G06F3/04847

  Interaction techniques to control parameter settings, e.g. interaction with sliders or dials · CPC title