US5558667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for treating vascular lesions
Assignee: ESC MEDICAL SYSTEMS Inc
•
Filing: 1995-01-06
•
Granted: 1996-09-24
•
Expires: 2015-01-06
Abstract
Abstract An apparatus and method is disclosed for treating vascular lesions. In the preferred embodiment, an intracavity, frequency doubled Nd:YAG laser is used to generate output pulses having a duration of 0.5 to 10.0 milliseconds. This laser output is used to irradiate the lesions. The laser energy is absorbed in the blood of the vein, causing it to coagulate and collapse. The long pulse duration helps to minimize bleeding while controlling thermal damage to surrounding tissue.
Inventors
- 👤 J. Michael Yarborough
- 👤 R. Rox Anderson
- 👤 George Marcellino
- 👤 Gerald M. Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:54
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/18; A61B18/20; A61B18/203; A61B17/00; A61B2017/00743; A61B2017/00747; A61B2017/00756; A61B2018/00315; A61B2018/00452; A61B2018/00458; A61N; A61N5/00; A61N5/06; A61N5/067
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
74 words
A method of treating vascular lesions with an intracavity doubled solid state laser, said laser having a neodymium doped solid state gain medium and a flashlamp for optically pumping the gain medium comprising of steps of: energizing the flashlamp with pulses having a duration between 0.5 and 10.0 milliseconds and a wavelength of 532 nm; and irradiating the lesion with said output pulses at a fluence level in excess of 1 joules/cm 2 .
Claim 2
Independent Claim
74 words
A method of treating vascular lesions with an intracavity doubled solid state laser, said laser having a neodymium doped solid state gain medium and a flashlamp for optically pumping the gain medium comprising of steps of: energizing the flashlamp with pulses having a duration between 0.5 and 10.0 milliseconds and a wavelength of 532 nm; and irradiating the lesion with said output pulses at a fluence level in excess of 1 joules/cm 2 .
Claim 3
Dependent Claim
18 words
A method as recited in claim 1 wherein said pulses have a duration between 5.0 and 10 milliseconds.
Claim 4
Dependent Claim
19 words
A method as recited in claim 1 wherein said fluence level is in excess of 10 joules/cm 2 .
Claim 5
Dependent Claim
19 words
A method as recited in claim 1 wherein said fluence level is between 10 and 20 joules/cm 2 .
Claim 6
Dependent Claim
18 words
A method as recited in claim 1 wherein said pulses have a repetition rate greater than 1 Hz.
References Cited (Backward Citations)
EP0075860A2
Cited
US5025446A
Cited
WO1990012545A1
Cited
US5282797A
Cited
EP0429297A2
Cited
WO1991013652A1
Cited
US5312395A
Cited
US5312396A
Cited
US5130997A
Cited
EP0527050A1
Cited
US5290273A
Cited
US5217455A
Cited
US5344418A
Cited
US5287380A
Cited
US5304170A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-09-24 | 2000-03-25 | 2000-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-09-24 | 2004-03-25 | 2004-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-09-24 | 2008-03-25 | 2008-09-24 | $7700.00 | Window Closed / Lapsed |