US5403306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laser surgery method
Assignee: Vanderbilt University
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Filing: 1993-06-22
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Granted: 1995-04-04
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Expires: 2013-06-22
Abstract
Abstract A laser surgery method is disclosed for use in efficient ablation of tissue with little or no thermal damage to adjacent tissues. The wavelength of the surgical laser is tuned to an absorption peak of a proteinaceous material or functional groups contained therein, the amides for example. A suitable power level is chosen to either vaporize or liquify the targeted tissue.
Inventors
- 👤 Glenn S. Edwards
- 👤 Regan A. Logan
- 👤 Denis M. O'Day
- 👤 Michael Copeland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:27
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/18; A61B18/20
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
64 words
A method of ablating human or animal tissue, said method comprising directing a beam of radiation from said laser at said tissue to be ablated, said laser radiation having a wavelength which approximately corresponds to an energy absorption peak of at least one amide band of said tissue, said amide band selected from the group consisting of Amide I, Amide II, and Amide III.
Claim 2
Independent Claim
64 words
A method of ablating human or animal tissue, said method comprising directing a beam of radiation from said laser at said tissue to be ablated, said laser radiation having a wavelength which approximately corresponds to an energy absorption peak of at least one amide band of said tissue, said amide band selected from the group consisting of Amide I, Amide II, and Amide III.
Claim 3
Independent Claim
40 words
A method of ablating tissue comprising the steps of: a. aiming a source capable of producing laser radiation at said tissue to be ablated; and b. operating said source at a wavelength wherein said radiation wavelength is approximately 6.45 microns.
Claim 4
Independent Claim
40 words
A method of ablating tissue comprising the steps of: a. aiming a source capable of producing laser radiation at said tissue to be ablated; and b. operating said source at a wavelength wherein said radiation wavelength is approximately 6.45 microns.
Claim 5
Independent Claim
40 words
A method of ablating tissue comprising the steps of: a. aiming a source capable of producing laser radiation at said tissue to be ablated; and b. operating said source at a wavelength wherein said radiation wavelength is approximately 6.0 microns.
Claim 6
Independent Claim
40 words
A method of ablating tissue comprising the steps of: a. aiming a source capable of producing laser radiation at said tissue to be ablated; and b. operating said source at a wavelength wherein said radiation wavelength is approximately 6.0 microns.
Claim 7
Independent Claim
40 words
A method of ablating tissue comprising the steps of: a. aiming a source capable of producing laser radiation at said tissue to be ablated; and b. operating said source at a wavelength wherein said radiation wavelength is approximately 7.7 microns.
Claim 8
Independent Claim
40 words
A method of ablating tissue comprising the steps of: a. aiming a source capable of producing laser radiation at said tissue to be ablated; and b. operating said source at a wavelength wherein said radiation wavelength is approximately 7.7 microns.
Claim 9
Independent Claim
73 words
A method of liquefying tissue comprising the steps of: a. aiming a source capable of producing laser radiation at said tissue to be liquified; b. operating said source at a radiation wavelength of 7.7 microns; c. exposing said tissue to said radiation for a duration and at an energy level sufficient to liquify but not vaporize said tissue, and without causing significant thermal damage to adjacent tissues; and d. removing said liquefied tissue.
Claim 10
Independent Claim
73 words
A method of liquefying tissue comprising the steps of: a. aiming a source capable of producing laser radiation at said tissue to be liquified; b. operating said source at a radiation wavelength of 7.7 microns; c. exposing said tissue to said radiation for a duration and at an energy level sufficient to liquify but not vaporize said tissue, and without causing significant thermal damage to adjacent tissues; and d. removing said liquefied tissue.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-04-03 | 1998-10-03 | 1999-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-04-03 | 2002-10-03 | 2003-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-04-03 | 2006-10-03 | 2007-04-04 | $7700.00 | Window Closed / Lapsed |