Combination ultrasound and laser method and apparatus for removing cataract lenses

• US 6,544,254 B1
• Filed: 06/28/2000
• Issued: 04/08/2003
• Est. Priority Date: 02/24/1988
• Status: Expired due to Term

• Current Assignee: Patricia Era Bath
• Original Assignee: Patricia Era Bath
• Inventors: Bath, Patricia Era
• Primary Examiner(s): Shay, David M.
• Application Number:
  US09/604,892
• Time in Patent Office: 1,014 Days
• Field of Search: 606/1, 606/2, 606/3-6, 606/10-17, 604/22, 604/20
• US Class Current: 606/6
• CPC Class Codes: A61B 2017/22017 the ultrasonic transmitting members being fibres
• CPC Class Codes: A61F 2009/0087 Lens
• CPC Class Codes: A61F 9/00745 using mechanical vibrations, e.g. ultrasonic
• CPC Class Codes: A61F 9/008 using laser
• CPC Class Codes: A61F 9/00802 for photoablation
• CPC Class Codes: A61F 9/00825 for photodisruption

Abstract

The present invention is a method and apparatus for removing the lens of the eye in which pulsed ultrasound and laser energy are transmitted by means of an optical fiber delivery system to the lens of the eye for therapeutic purposes. The parameters of laser radiation are chosen to optimize the processes of photo-phacoablation and photo-phacodisruption. The vibrational frequencies of ultrasound are selected to optimize sono-fragmentation sono-cavitation. Both laser radiation and ultrasound energy are delivered in effective combinations to maximize the precise removal of cataractous lens material.

Claims

1. A method for removing cataractous lenses from an eye, comprising the steps of:

transmitting laser radiation to a cataract,

transmitting ultrasound energy to the cataract,

observing the size of the particles generated by the transmission steps and

adjusting the relative proportion of the laser and the ultrasound to optimize the size of the generated particles.

2. The method of claim 1, including the steps of:

irrigating said generated particles with a fluid,

aspirating said fluid entrained with particles from said cataractous lens.

3. A method for removing cataractous lenses from an eye, comprising the steps of:

transmitting laser radiation to a cataract,

transmitting ultrasound energy to the cataract,

observing the size of the particles generated by the transmission steps and,

adjusting the laser parameters of wavelength, power, and frequency to optimize the size of the particles generated by the transmission steps.

4. The method of claim 3 including the steps of:

irrigating said generated particles with a fluid,

aspirating said fluid entrained with particles from said cataractous lens.

5. A method for removing cataractous lenses from an eye, comprising the steps of:

transmitting laser radiation to a cataract,

transmitting ultrasound energy to the cataract,

observing the size of the particles generated by the transmission steps and,

adjusting the ultrasound parameters of amplitude, power, and frequency to optimize the size of the particles generated by the transmission steps.

6. The method of claim 5, including the steps of:

irrigating said generated particles with a fluid,

aspirating said fluid entrained with particles from said cataractous lens.

7. A method for removing cataractous lenses from an eye, comprising the steps of:

transmitting laser radiation to a cataract,

observing the size of the particles generated by the laser transmission step and,

adjusting the laser parameters of wavelength, power, and frequency to optimize the size of the particles generated by the transmission step.

8. The method of claim 7 including the steps of:

irrigating said generated particles with a fluid,

aspirating said fluid entrained with particles from said cataractous lens.

9. A method for removing cataractous lenses from an eye, comprising the steps of:

transmitting ultrasound energy to a cataract,

observing the size of the particles generated by the transmission step and,

adjusting the ultrasound parameters of amplitude, power, and frequency to optimize the size of the particles generated by the transmission step.

10. The method of claim 9, including the steps of:

irrigating said generated particles with a fluid,

aspirating said fluid entrained with particles from said cataractous lens.