Laser Parameters for Medicine
The development of medical l =9.6 mm laser and special purpose accessories.
Tech Area / Field
8 Project completed
Senior Project Manager
Lapidus O V
Design Bureau of Instrument-Making, Russia, Tula reg., Tula
- Laser Medizin-Zentrum GmbH, Germany, Berlin\nUniversity College of Dublin / Department of Large Animal Clinical Studies, Ireland, Dublin\nNational Technical University of Athens / Physics Laboratory, Greece, Athens
Project summaryLaser medicine is a new minimum intervention approach to treat a wide range of diseases.
Many applications of lasers in different fields of the surgery and many kinds of laser apparatus for this applications are well known today.
CO2-laser, Ar-laser and Nd:VAG-laser enable to make successful surgical operations on skin, muscle or nerve tissues. But there is no effective laser for the surgery of bone tissues, in particular for the stomatology.
The Laser-Medizin-Zentrum (Berlin) investigation in optical properties of biological tissues and the action to that by laser radiation show, that infrared radiation at 9,6 mm has a high absorption in any tissue and a highest absorption in the tissues of bone or teeth.
We propose to get such radiation by waveguide CO2 laser. Due to the small size of the waveguide and high pressure of active medium waveguide laser has a wide range of the wavelength tuning. Usually this tuning has been achieved by difraction grating. Low efficiency of the grating and the absorption and thermal phenomena in Brewster window material lead to decreasing of the output power and changing of laser mode. Our proposition is to use output mirror coating as a filter of radiation wavelength. A special structure of the waveguide and its surfaces provide a single mode beam with high intensity and long lifetime. An original method of the optimization of the gas mixture by a symplex planning of the experiment increase the laser effectiveness.
The most difficult problems of the development:
1) Research and development of the mirror coating;
2) Research of the correlation between the state of the waveguide surfaces and the stability of the mode structure and output power;
3) Development of the symplex method of the optimization of gas mixture;
4) Design of laser construction with high thermal conductivity and mechanical stability;
5) Research and development of the light transporting system at 9,6 mm and 0,67 mm.
Solution of this problems will enable to develop a compact and effective laser apparatus which combine properties of the known apparatus and to make the surgical operations on bone or dental tissues as well as on skin, muscle or nerve tissues. A variety of suitable accessories to be used with laser systems ensure ideal sterility, effective bleeding coagulation, quick healing of outer and inner tissues under treatment. The instrument development is a separate scientific and technical task. The problems to be solved:
- serviceability under high laser beam density conditions;
- maximum tool miniaturization while maintaining high reliability;
- transmission of undistorted power distribution in the spot while bending the waveguide great angles;
- ease of different purpose handling.
This development provides a new system that has equivalents nowhere in the world and can be used in dermatology, angioplasty, for operation on teeth and bones.
The International Science and Technology Center (ISTC) is an intergovernmental organization connecting scientists from Kazakhstan, Armenia, Tajikistan, Kyrgyzstan, and Georgia with their peers and research organizations in the EU, Japan, Republic of Korea, Norway and the United States.
ISTC facilitates international science projects and assists the global scientific and business community to source and engage with CIS and Georgian institutes that develop or possess an excellence of scientific know-how.