Apparatus for endolaser microsurgery

• US 4,963,142 A
• Filed: 10/28/1988
• Issued: 10/16/1990
• Est. Priority Date: 10/28/1988
• Status: Expired due to Fees

• Current Assignee: Hanspeter Loertscher
• Original Assignee: Hanspeter Loertscher
• Inventors: Loertscher, Hanspeter
• Primary Examiner(s): Hindenburg, Max
• Application Number:
  US07/264,438
• Time in Patent Office: 718 Days
• Field of Search: 128/303.1, 128/395-398, 350/96.32, 606/13, 606/14
• US Class Current: 606/14
• CPC Class Codes: A61F 2009/00868 Ciliary muscles or trabecular meshwork
• CPC Class Codes: A61F 2009/00891 Glaucoma
• CPC Class Codes: A61F 9/00802 for photoablation
• CPC Class Codes: A61M 1/84 Drainage tubes; Aspiration tips for negative pressure wound therapy A61M1/90; for surgical cutting instruments A61B17/32

Abstract

A method and apparatus for performing endolaser microsurgery is disclosed, the apparatus including a laser delivery system coupled to a probe capable of transmitting the laser energy through a suitable medium such as sapphire. The probe includes a coaxial canal for aspiration of ablated tissue and/or fluids. The method involves steps of ablating tissue by laser and aspirating the ablated tissue and/or fluids, the method being useful for sclerostomy, vitrectomy and as a substitute for ultrasonic phacoemulsification among others.

Claims

1. A probe for performing endolaser microsurgery and removing ablated tissues in which said probe is connected to a laser delivery system for delivering pulsed laser energy, said system having an optical fiber delivery means with an end surface abutting said probe for conducting said energy, said probe comprising a walled tubular member for guiding the laser energy through said walls by way of providing multiple reflections at the cylindrical surfaces of said walls and including a central canal through said tubular member for aspiration of liquids and ablated tissue debris.

2. A probe as defined in claim 1 in which said tubular member is composed of sapphire having an outer diameter of one to one and one-half millimeters.

3. A probe as defined in claim 1 in which said tubular member is composed of sapphire and includes inner and outer cylindrical surfaces with a reflective coating surrounding said surfaces for reflecting the laser energy therewithin.

4. A probe as defined in claim 1 in which said tubular member is composed of sapphire and includes inner and outer cylindrical surfaces with a cladding for surrounding said surfaces for total reflection of said laser energy.

5. An intraocular probe as defined in claim 1 in which said tubular member is composed of sapphire and includes inner and outer cylindrical surfaces, and said Probe further includes coaxial metal tubes surrounding said inner and outer cylindrical surfaces and including a sealed air space therebetween for total reflection.

6. An intraocular probe as defined in claim 1 in which said optical fiber delivering means includes a container means having a coaxially arranged bundle of optical fibers therein with one end of said optical fiber bundle being coupled to said laser delivery system and said container means including an annular sapphire window at the end opposite said laser delivery means, said window also including a coaxial canal formed therein.

7. An intraocular probe as defined in claim 1 in which said optical fiber delivery means includes an optical fiber and said laser delivery system includes a conical reflecting prism coupled between said optical fiber and said probe, and said tubular member includes a secondary passageway communicating with said coaxial canal for aspiration of ablated material and fluids.

8. An intraocular probe as defined in claim 7 in which said laser delivery system delivers pulsed laser energy having a penetration depth of less than 300 microns in the tissue to be ablated.

9. An intraocular probe as defined in claim 7 in which said tubular member is composed of sapphire and includes inner and outer cylindrical surfaces, and reflective coating surrounding said surfaces for reflecting the laser energy therewithin.

10. An intraocular probe as defined in claim 7 in which said tubular member is composed of sapphire and includes inner and outer cylindrical surfaces with a cladding for surrounding said surfaces for total reflection of said laser energy.

11. A probe as defined in claim 1 in which the laser delivery system includes a laser apparatus generating pulsed laser energy having a penetration depth in water of less than 300 microns and a wavelength between 2 to 3 microns.

12. An intraocular probe as defined in claim 11 in which said tubular member is composed of sapphire and includes inner and outer cylindrical surfaces with a cladding for surrounding said surfaces for total reflection of said laser energy.

13. An intraocular probe as defined in claim 11 in which said tubular member is composed of sapphire and includes inner and outer cylindrical surfaces with reflective coating surrounding said surfaces for reflecting the laser energy therewithin.

14. An intraocular probe as defined in claim 1 in which said laser delivery system includes a laser apparatus having an optical fiber extending therefrom and a reflecting prism coupling said optical fiber to said probe for splitting the laser energy into multiple beams.

15. An intraocular probe as defined in claim 14 in which said tubular member is composed of sapphire and includes inner and outer cylindrical surfaces include reflective coating surrounding said surfaces for reflecting the laser energy therewithin.

16. An intraocular probe as defined in claim 14 in which said tubular member is composed of sapphire and includes inner and outer cylindrical surfaces with a cladding for surrounding said surfaces for total reflection of said laser energy.

17. A probe as defined in claim 1 in which said probe has a surface for delivering said laser energy being approximately an order of magnitude larger than said end surface of said optical fiber delivery means.