laser hair removal devices

The History of Laser Hair Removal

The lasers used for laser hair removal developed from a theory instituted by the Nobel prize-winning physicists Albert Einstein and Max Planck. This theory, first introduced in the 1920s, defined stimulated emission, or laser. The word laser is an acronym for light amplification by stimulated emission of radiation. However, it wasn’t until the 1960s that the first true laser was built and patented by Gordon Gould, an American physicist.

Laser hair removal devices of the 1960s sent out a continuous wavelength which caused damage to the surrounding skin tissue. In the late 1960s, Dr. Leon Goldman was the first to begin testing a ruby laser for hair removal. It was also in this time frame that the Q switch with developed for use with a laser. With the development of the Q switch it was possible to control the energy of the laser beam to be sent to out in controlled pulses. The Q switch worked much in the same way as a camera shutter.

Early devices for laser hair removal proved to be ineffective. In order to remove the hair follicle, there was severe damage to the surrounding skin area. The ruby laser, as well as the argon laser, are no longer used for laser hair removal.

Throughout the next several decades, researchers and physicists continued to experiment and test lasers for successful hair removal. It wasn’t until the 1980s that the first laser was introduced as a safe and effective method of hair removal. This discovery actually happened by chance when scientists noted that birthmarks treated with certain types of lasers caused the hair in that area to disappear and not grow back.

The FDA cleared the first laser for hair removal in 1995 . This laser, called the Soft Light, was a NeoDymium Yttrium Aluminum Garnets laser and was manufactured by Thermolaise. This laser was used with a chromophore of carbon-based lotion. After the skin was waxed, the carbon-based lotion would be rubbed onto the skin and enter the hair follicle. The beam of light produced by the laser would heat the carbon quickly and destroy the hair follicle. However, this type of laser treatment could easily damage nearby skin cells. Eventually, this type of laser hair removal proved to be less effective than targeting the natural pigmentation that existed in the skin.

In 1997, several types of laser hair removal devices were cleared by the F DA. One of these was the ruby laser, which used a shorter wavelength system. However, clinical research eventually showed that the laser did not produce damage far enough down the hair shaft to result in permanent hair loss. Researchers also found that if a t the ruby laser was used on people with dark or tan skin there was a high risk of hyperpigmentation. Other types of laser hair removal devices today include alexandrite, diode, and NeoDymium Yttrium Aluminum Garnets lasers.

Research and development in the area of laser hair removal are still in the early stages. However, continuing research, testing and development in this area continues to produce safer and more effective equipment.

Safety Issues Regarding Laser Hair Removal

Safety issues regarding laser hair removal relate to both clients and technicians. These safety issues are very different than those involving other forms of epilation. There are no concerns of drawing blood, contaminating probes, or risking infection. However, there are concerns regarding burns and eye safety. Several organizations have laid down guidelines to ensure the safety of both the clients and technicians. These organizations include The Occupational Safety and Health Administration, The American National Standards Institute, The Food and Drug Administration, The Center for Devices and Radiological Health, and The Society for Clinical and Medical Hair Removal.

All laser hair removal devices in the United States are subject to very strict mandatory performance standards. They also must meet the federal laser product performance standard, which includes specifying their safety features, both for the benefit of the patient and technician.

It is best to purchase new laser hair removal equipment. If used equipment must be purchased, it should only be bought from a qualified distributor with the assurance that it has been thoroughly checked and serviced. The equipment should also be guaranteed..

The room that is used for laser hair removal can be used for other treatments. However, it must be set up in accordance with the strict guidelines that are associated with the use of laser equipment. Setting up the room the proper way is usually done by the equipment distributor or the manufacturer.

The laser hair removal room should have a door that can be locked during treatment. There should be a warning light outside the door to let others know that treatment is being done and they should not enter. There should be protective eyewear, outside of the door for people who may need to enter during a treatment. They should not be any windows in the room, however if there are windows they should be blacked out with protective coverings. It is very important to that the electrical outlet has its own circuit breaker. It also must be grounded, and have the proper amperage and voltage. The room should not have any mirrors or reflective surfaces in it.

Laser hair removal equipment should be on a flat surface and have plenty of ventilation around it. This equipment should only be serviced and calibrated according to the manufacturer’s guidelines for that particular device. It should be regularly cleaned of any carbon buildup that may occur. When the laser equipment is not in use the key should be removed.

It is important that the operator of the laser hair removal device be well trained and qualified. This training should be in all areas including histology and client care. The technician should not wear any reflective clothing or jewelry. The technician, along with any other person in the room, is required to wear ANSI approved protected our eyewear in order to avoid laser blindness.

The client should receive a thorough and detailed consultation, pre and post care instructions, and a patch test before the laser hair removal treatment begins. It is also important that the client understands the benefits and risks of the treatment. During the laser hair removal process the client should wear ANSI approved protective eyewear and be instructed to keep the eyewear on throughout the treatment.

There are several different types of laser hair removal devices available today. These are alexandrite lasers, diode lasers, ruby lasers, and NeoDymium Yttrium Aluminum Garnets, which is commonly referred to as Nd:YAGs.

Alexandrite lasers became available for use in laser hair removal in 1997 when they were cleared by the FDA. Alexandrite lasers produce light beams in the red spectrum of visible light.
Their wavelength is 755 nanometers which is very effective but only safe on light skin. Generally, alexandrite lasers are considered long pulsed and because of this produce greater depth penetration. Five different types of the alexandrite laser are available. These include the Apogee, GentleLase, Epicare, Epitouch Alex, and Ultrawave II-III.

The FDA also cleared diode lasers for use in 1997 as an effective method of permanent hair reduction. Diode lasers produce a wavelength of 800 nanometers with pulse widths of 5-400 milliseconds. This type of laser has proved successful in the treatment of ingrown eyelashes and works very well on dark hair. The Light SheerXC is a diode laser that is extremely powerful. Other diode lasers include EpiStar, Apex-800, Iridex, and Mediostar.

Ruby lasers were also cleared by the FDA for laser hair removal in 1997, however, they did not prove as effective. Clinical research showed that the laser damage did not extend far enough down into the hair shafts to result in permanent laser hair removal. Originally there were five types of ruby lasers, of which only two are still available for commercial use. A Ruby lasers operate on a shorter wavelength system of only 694 nanometers.

NeoDymium Yttrium Aluminum Garnets have a longer wavelength which makes them more effective for longer term, and according to some people, even permanent laser hair removal. There are two types of Nd:YAGs lasers. These are the Q switched and the long pulse. All Nd:YAGs produce a wavelength of 1064 nanometers. The Q, switched NeoDymium Yttrium Aluminum Garnets has a very short pulse of about one nanosecond. Long pulse NeoDymium Yttrium Aluminum Garnets have a pulse of about a millisecond and can be used on all skin types.

The pulse duration, or pulse width, of lasers used for hair removal is the timing of the light energy. It is usually measured in milliseconds. Most lasers used for hair removal have a maximum pulse duration in the 20 to 40 millisecond range. Longer pulse widths are generally considered more effective and produce fewer side effects.

Each type of laser produces a specific spot size which is measured in millimeters. The spot size is the size, or width, of the beam of light at the laser sends out. A spot size of seven to 10 mm is considered acceptable for laser hair removal.

Most lasers have three main parts, an energy source, and active medium, and an optical cavity, also known as a resonator. The energy source is a device that supplies energy to the active medium. Laser hair removal devices use electricity as their energy source. The element of the active medium contains atoms that can both absorb and store the energy. The optical cavity is the part of the laser that contains the active medium. Lasers are defined by the elements they use.