Alexandrite laser system for treatment of dermatological specimens
US6273883A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 8, 1997 |
| Grant date | Aug 14, 2001 |
| Priority date | — |
| Expiry date | Apr 8, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S2301/08
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A long pulse alexandrite laser system for treating dermatological specimens is disclosed. The use of alexandrite allows operation in the near-infrared, specifically in a 50 nm range surrounding 755. Infrared in this range allows good penetration while still achieving an acceptable ratio of hemoglobin to melanin absorption. In operation, the laser generates pulses; having a durations between 5 and 100 msec and fluences between 10 and 50 J/cm.sup.2. A light delivery system is provided that transmits the laser light output pulse to dermatological targets of a patient. The system is also directed to a hair removal. Here, it is desirable to use an index-matching application on the skin sections to be treated, and a visual indicator is thermo- or photo-responsive or otherwise responsive to the laser light pulse to generate a visible change. This provides the operator with a record of those parts of the skin that have already been treated. Finally, the system is directed to a combined sclerotherapy and light treatment method and kit for unwanted veins. Substantially increased success, in the range of 90-100% has been achieved by implementing a dwell time of between 12 hours and 6 months b…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.