US5344418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical system for treatment of vascular lesions
Assignee: Individual
•
Filing: 1991-12-12
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Granted: 1994-09-06
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Expires: 2011-12-12
Abstract
Abstract An improved optical system for treatment of disorders of the skin, especially vascular lesions, such as PortWine Stains. The system irradiates the skin with radiation at a predetermined wavelength and cools the skin during a predetermined time interval in coordination with delivery of the radiation. The absorption of the radiation by the skin and the change in temperature of the skin is monitored by the system and the operation of the radiation delivery system is controlled to optimize treatment of the vascular lesion. The source of irradiation is an arc lamp and the cooling system delivers a cooling gas to a lens in contact with the skin. The cooling gas can be carbon dioxide, freon, or any other appropriate gas. The lens used has a high heat conductivity and may be formed of sapphire.
Inventors
- 👤 Shahriar Ghaffari
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:02
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/18; A61B18/20; A61B18/203; A61B17/00; A61B2017/00017; A61B2017/00022; A61B2017/00057; A61B2017/00743; A61B2017/00747; A61B2017/00756; A61B2018/00005; A61B2018/00011; A61B2018/00029; A61B2018/00315; A61B2018/00452; A61B2018/1807; A61B18/22; A61B2018/2255; A61B2018/2266; A61B2018/2272; A61F; A61F7/00; A61F2007/0059; A61F2007/0063; A61F2007/0064; A61F2007/0065
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
131 words
An optical system for treating vascular lesions, comprising: irradiating means for irradiating skin with electromagnetic radiation; monitoring means coupled to said irradiating means for monitoring absorption of said radiation by said skin; controlling means coupled to said monitoring means and said irradiating means for controlling the operation of said irradiating means to deliver a predetermined dose of radiation to said skin; and cooling means coupled to said irradiating means for cooling the surface of said skin, said cooling means comprising: a lens having one side in contact with said skin, wherein said lens is comprised of a material that is transparent to visible light and has a high thermal conductivity; and means for circulating a cooling gas to contact with said lens on the side not in contact with said skin.
Claim 2
Dependent Claim
131 words
An optical system for treating vascular lesions, comprising: irradiating means for irradiating skin with electromagnetic radiation; monitoring means coupled to said irradiating means for monitoring absorption of said radiation by said skin; controlling means coupled to said monitoring means and said irradiating means for controlling the operation of said irradiating means to deliver a predetermined dose of radiation to said skin; and cooling means coupled to said irradiating means for cooling the surface of said skin, said cooling means comprising: a lens having one side in contact with said skin, wherein said lens is comprised of a material that is transparent to visible light and has a high thermal conductivity; and means for circulating a cooling gas to contact with said lens on the side not in contact with said skin.
Claim 3
Dependent Claim
13 words
The system of claim 1, wherein said irradiating means comprises an arc lamp.
Claim 4
Dependent Claim
19 words
The system of claim 2, wherein said monitoring means comprises means for measuring the time of absorption of radiation.
Claim 5
Dependent Claim
20 words
The system of claim 2, wherein said monitoring means comprises means for measuring the reflection of radiation from the skin.
Claim 6
Dependent Claim
11 words
The system of claim 1, wherein said cooling gas comprises freon.
Claim 7
Dependent Claim
12 words
The system of claim 1, wherein said cooling gas comprises carbon dioxide.
Claim 8
Dependent Claim
11 words
The system of claim 1, wherein said lens material is sapphire.
Claim 9
Dependent Claim
11 words
The system of claim 1, wherein said lens material is diamond.
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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) | 1997-09-05 | 1998-03-07 | 1998-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-09-05 | 2002-03-07 | 2002-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-09-05 | 2006-03-07 | 2006-09-06 | $7700.00 | Window Closed / Lapsed |