Multiwavelength medical laser method

• US 5,304,167 A
• Filed: 07/17/1992
• Issued: 04/19/1994
• Est. Priority Date: 11/10/1988
• Status: Expired due to Term

• Current Assignee: BL Acquisition II Inc., Pfizer Hospital Products Group, Inc. (Pfizer Inc.)
• Original Assignee: Premier Laser Systems, Inc.
• Inventors: Freiberg, Robert J.
• Primary Examiner(s): Cohen, Lee S.
• Application Number:
  US07/917,589
• Time in Patent Office: 641 Days
• Field of Search: 606/3, 606/7-12, 606/15, 606/16, 128/395-398
• US Class Current: 606/3
• CPC Class Codes: A61B 17/11 for performing anastomosis; Buttons for anastomosis
• CPC Class Codes: A61B 17/24 for use in the oral cavity, larynx, bronchial passages or nose for medical inspection of cavities or tubes in the body A61B1/00; Tongue scrapers
• CPC Class Codes: A61B 18/201 with beam delivery through a hollow tube, e.g. forming an articulated arm through a flexible conduit A61B18/22; Hand-pieces therefor
• CPC Class Codes: A61B 18/24 with a catheter A61B18/26, A61B18/28 take precedence
• CPC Class Codes: A61B 2017/00508 using laser
• CPC Class Codes: A61B 2017/00973 pedal-operated
• CPC Class Codes: A61B 2018/00017 with gas
• CPC Class Codes: A61B 2018/2025 with a pilot laser
• CPC Class Codes: A61B 2018/2075 mixing three wavelengths

Abstract

A medical system for transmitting and delivering to a tissue site multiwavelength therapeutic radiant energy along a common optical pathway. Also included is a laser catheter suitable for engaging multiple sources of laser energy and transmitting multiwavelength therapeutic laser energy along a common optical path for delivery to a worksite.

Claims

1. A surgical method, comprising:

generating a first beam of pulsed electromagnetic energy having a first wavelength of approximately three microns;

generating a second beam of electromagnetic energy having a second wavelength in a visible portion of the optical spectrum;

coupling the electromagnetic energy of the first and second wavelengths to a fluoride optical fiber such that said first and second wavelengths are simultaneously transmitted through said fiber;

directing energy from a distal end of the fluoride optical fiber into an optically transparent member comprised of material different than said optical fiber;

using said optically transparent member to focus the first beam of energy; and

placing said optically transparent member into contact with tissue and using the energy at the first wavelength to perform surgery on the tissue.

2. The method of claim 1, wherein said second beam comprises an aiming beam produced by a continuous wave helium neon laser.

3. The method of claim 1, wherein the first wavelength is about 2.9 microns.

4. A surgical method, comprising:

generating a first beam of pulsed electromagnetic energy having a first wavelength of approximately three microns;

generating a second beam of electromagnetic energy having a second wavelength in a visible portion of the optical spectrum;

coupling the electromagnetic energy of the first and second wavelengths to a fluoride optical fiber such that said first and second wavelengths are simultaneously transmitted through said fiber;

generating a third beam of energy having a third wavelength of approximately one micron, and coupling said third beam to said fluoride optical fiber;

directing energy from a distal end of the fluoride optical fiber into an optically transparent member comprised of material different than said optical fiber; and

placing said optically transparent member into contact with tissue and using the energy at the first wavelength to perform surgery on the tissue.

5. The method of claim 4, wherein said third beam is a continuous wave beam.

6. A surgical method, comprising:

generating a first beam of pulsed electromagnetic energy having a first wavelength of approximately three microns;

generating a second beam of electromagnetic energy having a second wavelength in a visible portion of the optical spectrum;

coupling the electromagnetic energy of the first and second wavelengths to an optical fiber comprised of a compound that includes a metal such that said first and second wavelengths are simultaneously transmitted through said fiber;

directing energy from a distal end of the optical fiber into an optically transparent member comprised of material different than said optical fiber;

using said optically transparent member to focus the first beam of energy; and

directing energy of said first wavelength from said optically transparent member against tissue to perform surgery on the tissue.

7. The method of claim 6, wherein the step of using said optically transparent member to focus comprises passing the first beam of energy through a spherical surface on said optically transparent member.

8. The method of claim 6, wherein the step of using said optically transparent member to focus comprises passing the first beam of energy through the optically transparent member and concentrating energy of said first wavelength at a location proximal to an energy exit surface of said transparent member.

9. The method of claim 6, wherein said metal comprises zirconium, and wherein the step of coupling comprises directing the first and second beams into an end of the optical fiber.

10. The method of claim 6, wherein said metal comprises zirconium and said optical fiber comprises zirconium fluoride and wherein the step of coupling comprises directing the first and second beams into an end of the zirconium fluoride optical fiber.

11. The method of claim 6, wherein said second beam comprises an aiming beam produced by a continuous wave helium neon laser.

12. The method of claim 6, additionally comprising the steps of generating a third beam of energy having a third wavelength of approximately one micron, and coupling said third beam to said optical fiber.

13. The method of claim 12, wherein said third beam is a continuous wave beam.

14. The method of claim 6, wherein the first wavelength is about 2.9 microns.

15. A surgical method, comprising:

generating a first beam of pulsed electromagnetic energy having a first wavelength of approximately three microns;

generating a second beam of electromagnetic energy having a second wavelength in a visible portion of the optical spectrum;

coupling the electromagnetic energy of the first and second wavelengths to an optical fiber comprised of a compound that includes a metal such that said first and second wavelengths are simultaneously transmitted through said fiber;

generating a third beam of energy having a third wavelength of approximately one micron, and coupling said third beam to said optical fiber;

directing energy from a distal end of the optical fiber into an optically transparent member comprised of material different than said optical fiber;

directing energy of said first wavelength from said optically transparent member against tissue to cut the tissue; and

directing energy of the third wavelength from said optically transparent member against tissue to coagulate the tissue.