US5644585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High repetition rate Eribum-YAG laser for tissue ablation
Assignee: ESC MEDICAL SYSTEMS Inc
•
Filing: 1996-07-22
•
Granted: 1997-07-01
•
Expires: 2016-07-22
Abstract
Abstract A medical laser system is disclosed for ablating biological material. The system includes an Erbium:YAG gain medium capable of generating a pulsed output having a wavelength of 2.9 microns. The laser is optimized to generate a pulsed output having a repetition rate of at least 50 hertz and preferably at least 100 hertz. The output is delivered to the target tissue via an optical fiber. Preferably, a suction source is provided to aspirate the tissue as it is being ablated. The erbium laser system provides accurate ablation with minimal damage to surrounding tissue
Inventors
- 👤 Gerald M. Mitchell
- 👤 Edward D. Reed
- 👤 Greg J. Spooner
- 👤 Michael Hmelar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:24
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/05; H01S3/06; H01S3/0602; H01S3/0615; A; A61; A61F; A61F9/00; A61F9/007; A61F9/008; A61F9/00802; A61F9/00825; H01S3/08; H01S3/23; H01S3/2383; A61B; A61B18/00; A61B18/18; A61B18/20; A61B18/22; A61B18/26; A61F2009/00861; A61F2009/0087; A61F2009/00885; A61F2009/00887; A61F9/00736; H01S3/005; H01S3/08072; H01S3/09; H01S3/091; H01S3/0915; H01S3/092; H01S3/10; H01S3/102; H01S3/14; H01S3/16; H01S3/1601; H01S3/1603; H01S3/1608
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
162 words
A laser system comprising: a first erbium doped solid state gain medium located with a first resonant cavity, wherein said first cavity has a first output coupler; a second erbium doped solid state gain medium located within a second resonant cavity, wherein said second cavity has a second output coupler; an optical pump means for periodically exciting said gain media to generate laser output pulses; a power supply for energizing said pump means at a predetermined repetition rate and duration and wherein the transmission of each of the output couplers are selected to control the energy threshold input for lasing and wherein the design parameters of the cavities are selected to compensate for thermal lens effects such that stable laser output pulses are generated at a repetition rate of at least 50 hertz from each cavity; means for combining the laser output pulses from the two gain medium to achieve an interleaved output having a repetition rate of at least 100 hertz.
Claim 2
Dependent Claim
162 words
A laser system comprising: a first erbium doped solid state gain medium located with a first resonant cavity, wherein said first cavity has a first output coupler; a second erbium doped solid state gain medium located within a second resonant cavity, wherein said second cavity has a second output coupler; an optical pump means for periodically exciting said gain media to generate laser output pulses; a power supply for energizing said pump means at a predetermined repetition rate and duration and wherein the transmission of each of the output couplers are selected to control the energy threshold input for lasing and wherein the design parameters of the cavities are selected to compensate for thermal lens effects such that stable laser output pulses are generated at a repetition rate of at least 50 hertz from each cavity; means for combining the laser output pulses from the two gain medium to achieve an interleaved output having a repetition rate of at least 100 hertz.
Claim 3
Dependent Claim
28 words
A system as recited in claim 1 wherein said delivery means further includes a means for aspirating the tissue which has been cut, vaporized, ablated, incised or emulsified.
References Cited (Backward Citations)
US4521194A
Cited
US4862886A
Cited
US4818230A
Cited
US5048034A
Cited
US4744360A
Cited
US4846172A
Cited
US5112328A
Cited
US5342198A
Cited
EP0335714A2
Cited
US5423798A
Cited
WO1989011261A1
Cited
US5074861A
Cited
US5222952A
Cited
US5304167A
Cited
US5139494A
Cited
US4988163A
Cited
US5005180A
Cited
JPH03233986A
Cited
US5263950A
Cited
US5243615A
Cited
US5246436A
Cited
US5246435A
Cited
US5349590A
Cited
US5290274A
Cited
EP0575274A1
Cited
US5274728A
Cited
US5401171A
Cited
US5363387A
Cited
US5435724A
Cited
US5387211A
Cited
US5387211B1
Cited
US5375132A
Cited
EP0626229A1
Cited
US5422899A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-06-30 | 2000-12-30 | 2001-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-06-30 | 2004-12-30 | 2005-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-06-30 | 2008-12-30 | 2009-07-01 | $7700.00 | Window Closed / Lapsed |