Medical laser device and method

• US 5,074,861 A
• Filed: 06/15/1990
• Issued: 12/24/1991
• Est. Priority Date: 05/23/1988
• Status: Expired due to Fees

• Current Assignee: Richard H. Keates, Richard T. Schneider
• Original Assignee: Richard H. Keates, Richard T. Schneider
• Inventors: Keates, Richard H., Schneider, Richard T.
• Primary Examiner(s): Kamm, William E.
• Assistant Examiner(s): Getzow, Scott M.
• Application Number:
  US07/539,383
• Time in Patent Office: 557 Days
• Field of Search: 128/303, 128/1, 128/395-398, 219/121.6, 219/121.74, 219/121.75, 372/108, 372/70, 372/72, 372/79, 606/3, 606/4, 606/6, 606/15-17, 600/2
• US Class Current: 606/17
• CPC Class Codes: A61B 18/20 using laser
• CPC Class Codes: A61B 2018/0097 Cleaning probe surfaces
• CPC Class Codes: A61B 2018/2005 with beam delivery through an interstitially insertable device, e.g. needle
• CPC Class Codes: A61F 2009/0087 Lens
• CPC Class Codes: A61F 2009/00887 Cataract
• CPC Class Codes: A61F 9/008 using laser

Abstract

An apparatus and method for conducting laser emulsification surgery are disclosed. Laser energy is generated within the hand held member (10) and is transmitted to the probe cylinder (15) at the distal end of the device (2). The apparatus is a hand held device which contains a laser light source and flashlamp (12) for generating and emitting the laser radiation. Preferably, an Erbium YAG laser is utilized. A light horn arrangement (18) or mirror arrangement (51) transmits the light energy from the source (12) to the proximal end of a probe extension member (15). The distal tip (31) of the probe extension member (15) is directed to the cataract or other target to be emulsified.

Claims

1. An apparatus for conducting laser emulsification surgery, said apparatus comprising:

(a) a laser source within a housing for emitting laser light;

(b) a probe extension mounted on said housing, said probe extension having a proximal end proximate said laser source and an opposite distal end; and

(c) transmission means for transmitting light energy from said laser source to said proximal end of said probe extension, said transmission means including a plurality of light horns, each light horn having a proximal end which is proximate to said laser source, said light horns receiving laser radiation from said laser source and amplifying said radiation by converging it.

2. The apparatus for conducting laser emulsification surgery according to claim 1, wherein said laser source emits laser light having a wavelength of approximately 2.9 to 3.1 micrometers.

3. The apparatus for conducting laser emulsification surgery according to claim 2, wherein said laser light

4. The apparatus for conducting laser emulsification surgery according to claim 2, wherein said light horns have straight walls of conically tapering cross-section.

5. The apparatus for conducting laser emulsification surgery according to claim 2, wherein said light horns have curved walls of tapering cross-section.

6. The apparatus for conducting laser emulsification surgery according to claim 2, further comprising an elongate optical cylinder element removably mounted in said probe extension and retained therein by a probe extension mounting and release mechanism, said optical cylinder having a probe tip projecting outwardly from said probe extension.

7. The apparatus for conducting laser emulsification surgery according to claim 6, wherein said cylinder element is made of calcium fluoride.

8. The apparatus for conducting laser emulsification surgery according to claim 7, wherein said laser source is positioned within a source housing and includes a central longitudinal flashlamp which is surrounded by a plurality of parallel laser rods, wherein said source housing includes a reflective inner wall.

9. The apparatus for conducting laser emulsification surgery according to claim 8, wherein said rods are positioned so as to be in close proximity to said inner wall and to each other.

10. An apparatus for conducting laser emulsification surgery according to claim 6, further comprising a lens which receives light from said light hours and which converges light onto said optical cylinder element.

11. An apparatus for conducting laser emulsifications surgery according to claim 6, wherein the optical cylinder element is constructed of material selected from the group consisting of magnesium flouride, zinc sulfide, zinc selenide, magnesium oxide, and cadmium teleride.

12. The apparatus for conducting laser emulsification surgery according to claim 2, wherein said light horns have curved walls of tapering cross-section.

13. An apparatus for conducting laser emulsification surgery, said apparatus comprising:

(a) a plurality of laser rods for emitting laser light, said plurality of laser rods being positioned within a housing in a manner parallel to and surrounding a central longitudinal flashlamp, said housing having a reflective inner walls;

(b) a probe extension mounted on said housing, said probe extension having a proximal end proximate said plurality of laser rods and an opposite distal end; and

(c) transmission means for transmitting light energy from each of said laser rods to said proximal end of said probe extension, said transmission means including a plurality of mirrors, said mirrors receiving laser radiation from said plurality of laser rods and amplifying said radiation by converging it; and

(d) a lens which receives light from said mirrors; and

(e) an optical cylinder element removably mounted in said probe extension;

said lens converging light onto said optical cylinder element.

14. The apparatus for conducting laser emulsification surgery according to claim 13, wherein each of said laser rods emits laser light having a wavelength of approximately 2.9 to 3.1 micrometers.

15. The apparatus for conducting laser emulsification surgery according to claim 14, wherein each of said laser rods in an Erbium YAG laser.

16. The apparatus for conducting laser emulsification surgery according to claim 13, wherein said rods are positioned so as to be in close proximity to each other.

17. An apparatus for conducting laser emulsification surgery, said apparatus comprising:

(a) means for emitting laser light, said emitting means including a longitudinal flashlamp and a plurality of laser rods positioned within a housing, said laser light emitting means generating laser light having a wavelength of approximately 2.9-3.1 micrometers;

(b) a probe extension mounted on said housing, said probe extension having a proximal end proximate said laser light emitting means and an opposite distal end;

(c) transmission means for transmitting said light from said laser emitting means to said proximal end of said probe extension including a plurality of light horns, each light horn having a proximal end which is proximate to an end of one of said laser rods, said light horns receiving laser radiation from said laser rods and amplifying said radiation by converging it; and

(d) cooling means proximate said laser rods for cooling said laser light emitting means.

18. The apparatus for conducting laser emulsification surgery according to claim 17, further comprising:

(a) a lens which receives light from said light horns; and

(b) an optical cylinder element removably mounted in said probe extension;

said lens converging light onto said optical cylinder element.

19. The apparatus for conducting laser emulsification surgery according to claim 17, wherein said light horns have straight walls of conically tapering cross-section.

20. The apparatus for conducting laser emulsification surgery according to claim 17, wherein said light horns have curved walls of tapering cross-section.

21. An apparatus for conducting laser emulsification surgery, said apparatus comprising:

a) light emitting means comprising a flashlamp and a plurality of parallel laser rods surround said flashlamp, said laser rods being positioned within a housing to minimize interstitial spacing between adjacent rods;

b) a probe extension mounted on said housing, said probe extension having a proximal end proximate said laser light emitting means and opposite distal end;

c) an elongate optical cylinder element constructed of calcium fluoride mounted in said probe extension, said optical cylinder element having a probe tip projecting outwardly from said probe extension; and

d) transmission means for transmitting said laser light from said laser light emitting means to said proximal end of said probe extension.

22. A handheld apparatus for conducting laser emulsification and microsurgery, said apparatus, comprising:

(a) handheld means for emitting laser light comprising a housing containing a plurality of laser rods surrounding a longitudinal flashlamp;

(b) a solid inflexible probe extension with a first end proximate said laser rods and a second end constructed and arranged for operative use at emulsification and surgical sites; and

(c) coupling means for coupling said laser light emanating from said laser rods into said probe extension, whereby said laser light is transmitted to said emulsification and surgical site.

23. A handheld apparatus for conducting laser surgery, said apparatus comprising:

(a) means for emitting laser light comprising a plurality of Erbium YAG laser rods positioned around and parallel to a flashlamp, said flashlamp and said laser rods being located in a common housing suitable for manipulation by a surgeon'"'"'s hand independent of any other support;

(b) a probe extension mounted on said housing, said probe extension having a proximal end proximate said means for emitting laser light and an opposite distal end; and

(c) transmission means for transmitting said laser light from said laser rods to said proximal end of said probe extension.

24. A handheld apparatus for conducting laser emulsification surgery, comprising:

(a) means for emitting laser light comprising a flashlamp and a laser rod each positioned with a common housing, said common housing comprising an ergonomically constructed housing suitable for manipulation and use by a user'"'"'s hand independent of any other support structure;

(b) a probe extension mounted on said housing, said probe extension having a proximal end proximate said means for emitting laser light and an opposite distal end, said probe extension comprising an extension cylinder probe constructed of solid material; and

(d) transmission means for transmitting said laser light from said laser rod to said proximal end of said probe extension whereby said laser light is then transmitted to a laser emulsification surgical site.

25. A handheld apparatus for conducting laser emulsification surgery according to claim 24 wherein said extension cylinder probe comprises solid material selected from the group consisting of calcium fluoride, magnesium fluoride, zinc sulfide, zinc selenide, magnesium oxide, and cadmium teleride.

26. A handheld apparatus for conducting laser emulsification surgery, comprising:

(a) means for emitting laser light comprising a flashlamp and a laser rod each positioned within a common housing, said common housing comprising an ergonomically constructed housing suitable for manipulation and use by a user'"'"'s hand independent of any other support structure;

(b) a probe extension mounted on said housing, said probe extension having a proximal end proximate said means for emitting laser light and an opposite distal end, said probe extension comprising;

(i) an extension cylinder probe constructed of solid material; and

(ii) a mounting and release mechanism for mounting said extension cylinder probe in said probe extension and for selectively and readily releasing said extension cylinder probe to facilitate sterilization; and

(c) transmission means for transmitting said laser light from said laser rod to said proximal end of said probe extension whereby said laser light is then transmitted to a laser emulsification surgical site.

27. A handheld apparatus for conducting laser emulsification surgery, comprising:

(a) means for emitting laser light comprising a central longitudinal flashlamp and a plurality of laser rods positioned parallel to said flashlamp, said flashlamp and said laser rods being located within a housing comprising a reflective inner wall, said laser rods being positioned in close proximity to said reflective inner wall and to adjacent rods, said housing being constructed and arranged for operative support and surgical manipulation by a user'"'"'s hand independent of any other support;

(b) a probe extension mounted on said housing, said probe extension having a proximal end proximate said means for emitting laser light and an opposite distal end; and

(c) transmission means for transmitting said laser light from said laser rods to said proximal end of said probe extension.