*IN THE NAME OF GOD* summary Basics of laser in surgery from Incision time to Restoration Dr.Alborz Mirzadeh Th e development of non-invasive, non-toxic, and non-pollutant methods for the treatment of diff erent illnesses represents a constant concern of scientists from the medical fi eld worldwide. In this category fi t the methods based on the use of laser systems, which are successfully applied both in human and veterinary medicine due to the special properties of laser radiation: monocromaticity, coherence, intensity, and directionality. Th e aim of this paper is to present the laser systems used in several domains of veterinary medicine and some experimental results obtained by diff erent authors. Fields of laser use in veterinary medicine Protecting life and human and animal health is a constant concern of both doctors and specialists in various fi elds (biochemistry, biophysics, biology, etc.). Th eir joint eff orts have led to the development of new methods of treatment based on new discoveries and technology including laser. The first use of lasers in veterinary medicine was in larynx surgery in dogs (1) and horses (2). Th e results obtained in these early studies paved the way for the current use of the laser in general surgery, small animal targeting liver lobe resection, partial excision of the kidneys, and tumor excision or resection (intra-abdominal, intra-thoracic, breast, brain). At the same time, experiments on the use of laser for photodynamic therapy of tumors in animals and laser phototherapy have begun. What’s in a Name? • Low-intensity-level • Therapeutic Laser Laser • Low Level Laser • Photobiostimulation Therapy Laser • Low Power Laser • Photobiomodulation Therapy Laser • Low Level Laser • • Mid-Laser Low Power Laser • Low-energy Laser • Medical Laser • Soft Laser • Biostimulating Laser • Low-reactive-level • Bioregulating Laser Laser What is Laser Therapy? Light Amplification by the Stimulated Emission of Radiation Laser Compressed light of a wavelength from the cold, red part of the spectrum of electromagnetic radiation • Monochromatic - single wavelength, single color • Coherent - travels in straight line • Polarized - concentrates its beam in a defined location/spot What Does It Do? Laser light waves penetrate the skin with no heating effect, no damage to skin & no side effects. Laser light directs biostimulative light energy to the body’s cells which convert into chemical energy to promote natural healing & pain relief. Optimizes the immune responses of blood & has anti-inflammatory & immunosuppressive effects. Laser surgery Laser surgery is a type of surgery that uses a laser (in contrast to using a scalpel) to cut tissue. Laser surgery is commonly used on the eye. Techniques used include LASIK, which is used to correct near and far-sightedness in vision, and photorefractive keratectomy, a procedure which permanently reshapes the cornea using an excimer laser to remove a small amount of the human tissue. Types of surgical lasers include carbon dioxide, argon, Nd:YAG laser, and potassium titanyl phosphate, from among others Equipment Surgical laser systems, sometimes called "laser scalpels", are differentiated not only by the wavelength, but also by the light delivery system: flexible fiber or articulated arm, as well as by other factors. CO2 lasers were the dominant soft-tissue surgical lasers as of 2010. Applications Eye surgery Various types of laser surgery are used to treat refractive error. LASIK, in which a knife is used to cut a flap in the cornea, and a laser is used to reshape the layers underneath, is used to treat refractive error. IntraLASIK is a variant in which the flap is also cut with a laser. 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