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Laser Technologies in Medical
Transcript of Laser Technologies in Medical
State of the Art
Laser effect on eye
Laser Radiation Effects on Skin
Skin damage occurs from exposure to UV-B, UV-A, Visible,
IR-A, and IR-B with the greatest penetration depth from IR-A (ex. Nd:YAG 1064nm and 1320nm).
Penetration length of a laser radiation strongly depends on its wavelength.
Market is increasing tremendously !
Overview and State
of the art
Reported biological effects.
What about market ?
Laser Technologies in Medical
1- Ahmed Adel Abd El-monim
2- Ahmed Magdy Ibrahim
3- Mohamed Ahmed Hassan
4- Mohamed Ahmed said
5- Mohamed Anwar Fouly
6- Mohamed Yasser Abuella
Medical Applications of Laser
Lasers Heal and Reshape the Eyes
Cancer early detection and treatment
Cleaning Arteries with Light
dentists now employ laser instead of a drill for most cavities.
The laser treatment takes advantage of the fact that the material that forms in a cavity is much softer than the enamel
Does it hurt? Why?
Thank You !!
Any Questions ?!
Laser irradiation of the eye may cause damage to the cornea, lens, or retina, depending on the wavelength of the light and the energy absorption characteristics of the ocular tissues.
Damage can occur when a laser beam encounters tissue, depending on the combined characteristics of both the incident laser beam and the properties of the tissue involved.
Key factors are:
• Laser wavelength, power density, and pulse duration
• Tissue propensity to reflect, transmit, or selectively absorb the laser radiation
UV rays, depending on their type (UV-A or UV-B), penetrate at different depths inside skin layers. UV-B rays are absorbed in the external layer - the epidermis – and are responsible for red blotches similar to sun burns. UV-A rays penetrate more deeply than the previous ones, and are responsible for many skin diseases. Both types are responsible for skin affections including ageing, erythema (red blotches), pigmentation increase, light-sensitization or even cancer.
Visible and infrared radiations act on deeper layers through thermal effects. These radiation types can then induce vessels dilatation and red blotches, leading to skin burns from the surface to deeper layers.
3- Lumenis was founded in 1991. It is a global leader in providing energy-based clinical solutions. The company operates through three segments: Surgical Business, Aesthetic Business, and Ophthalmology Business.
Operation of lasers
How many of you have benefited from laser applications ?
the number of uses for medical lasers multiplied over the years
Traditional operations are risky !
bursts of light will burn away the plaque.
the exhaust vapors are sucked back through a tiny hollow tube with optical fiber
laser must be aimed very carefully because a slight miss could cut through the wall of the artery and cause serious bleeding
burning away extraneous blood vessels that can form on the retina that block light from the surface of the membrane
The laser can also repair a detached retina
glaucoma causes that eye fluid doesn't drain properly so The laser punches a hole in a preplanned spot and the fluid drains out.
The patient's eyeglass is carved inside the cornea with the beam of a laser.
A small flap of the cornea is first removed and then put back into place again after the prescription is carved
,the procedure has become increasingly popular each year.
The changes it makes in the cornea are permanent, and the danger of unexpected damage is ever present
Cosmetic Uses of Lasers
removing port-wine stain and certain kinds of birthmarks.
Unwanted hair permanently removal
Lasers have a major role to play in the early detection of cancer by looking at infrared spectroscopy using IR lasers.
It can be used with fiber optics to treat areas of the body that are often difficult to access.
Theory of laser
Different types of laser
Aging population & Rise in Eye Disorders Fuel demand for Ophthalmic Laser.
Rise in Non-Surgical Cosmetic Procedures Drivers Sales of Aeschetic Laser Systems.
Diagnostic Use of Lasers Brings in New Opportunities for Growth.
Innovation in Lasers Opens New Applications in Dentistry.
Fiber-Lasers Grow in Popularity Microsurgery.
Treatment of many cutaneous conditions, pigmented lesions, and congenital defects as well as the removal of tattoos and unwanted hair.
These procedures cause minimal pain and are therefore preferred by patients.
Drivers & Trends
Vendors in this market
1- AngioDynamics: is a medical diagnostic company that designs, manufactures, and sells a wide range of surgical and diagnostic devices for the treatment of disorders such as peripheral vascular disease and for use in surgical oncology.
2- Founded in 1989, IRIDEX is headquartered in Mountain View, California. It develops, manufactures, markets, and services medical laser systems and related instrumentation across the world, for the treatment of eye diseases that carry the risk of loss of vision. The company conducts its business through only one segment; Ophthalmology.
1- Mohamed Anwar Fouly
1- Ahmed Adel Abd El-monim
• Increasing the selectivity of the laser exposure
• Minimizing the thermal damage effect on the surroundings
Mohamed Ahmed Said
From LASIC to femto LASIC surgeries Why?
1. Reduced incidence of flap complications like buttonholes, free caps, irregular cuts etc.
2. Greater surgeon choice and control over flap diameter and thickness, side cut angle, hinge position and length
3. Increased precision with improved flap safety and better thickness predictability
4. Capability of cutting thinner flaps to accommodate thin corneas and high refractive errors
Improvements in eye surgeries
Improvements in cancer theraphy
Mohamed Ahmed Hassan
1- Gas Lasers (Argon, Krypton, etc . . . )
2-Liquid Dye Lasers
High Cost of Laser Procedures.
The risk factors during treatment using medical laser systems .
cancer and healthy tissue may have different transmissions in the IR range