The laser should not be used on the thyroid gland or on a pregnant uterus. However, using the laser away from the abdomen and uterus in a pregnant mother is safe. Relative contraindications include hypersensitivity to lasers and photosensitizing drugs or skin creams, although there are many that react with the UV spectrum, very few react with the infrared. Some autoimmune disorders and severe lupus can cause hypersensitivity to laser therapy.
Cold laser therapy should not be used on any suspected cancerous lesion or thyroid carcinoma in pregnant patients, and there should be no direct irradiation of the eyes, as the laser can cause permanent eye damage. The cosmetic application of laser therapy is a well-known field of laser therapy that has attracted much attention in dermatology and related fields.16 It is necessary to optimize several parameters of an applied laser to achieve a suitable therapeutic tool. Laser wavelength and pulse duration are the two important properties of laser therapy. It has been reported that there are complications associated with laser therapy, such as burns, infections, dispigmentation, ophthalmic lesions, the Koebner phenomenon, scarring, prolonged erythema, acne, milia and contact dermatitis.
Therefore, it should be noted that the prevention of these effects requires precautions to reduce long-term consequences. Patients with hemophilia and other blood and coagulation diseases should not receive laser treatment at this time, as we don't know enough about the effect it has on their ability to clot. However, this is more of a warning and advice than a contraindication. Lasers can be used for many medical purposes.
Because the laser beam is so small and precise, it allows healthcare providers to treat tissue safely without damaging the surrounding area. MLS laser therapy penetrates deep into foot tissue, rejuvenates different cell types, increases vascular function, stimulates enzyme production, and promotes collagen formation to reduce scar tissue. It can be concluded that laser therapy has attracted the attention of experts in almost all fields of medicine. The main reason why laser safety measures are followed is the possibility of thermal injury to the retina with a direct or reflected laser.
A laser whose power exceeds class 3R (5 mW but does not exceed 500 mW) is called a class 3B laser. Laser treatment applications also determine the shape of the lens and the need for additional protection. Laser therapy with a multiwave locking system (MLS) is a conservative, non-invasive intervention approved by the FDA for use in podiatry. The eye's lens effectively magnifies the laser beam, so a relatively low-power laser has the potential to damage the retina with brief exposure.
Low-level lasers, such as krypton, argon, He, Ne and ruby, are types of lasers that affect biological systems by non-thermal means. It's not because laser therapy doesn't have a stimulating effect, but because the law only allows specialists to treat cancer. The three most important points in laser safety are the maximum allowable exposure (MPE), the nominal danger zone (NHZ) and the optical density (OD) of the protective goggles. Following pre-established timed protocols for laser dosing will prevent some, if not all, of the potential adverse responses to treatment.
The NHZ describes a space or distance in which the level of direct, reflected or scattered radiation during normal operation of the laser exceeds the maximum exposure allowed.
