Medical Lasers and their Functions

There are several types of lasers used in the medical field, each with its own unique properties and applications.  Each type of laser has its own advantages and disadvantages, and the choice of laser depends on the specific medical procedure. As medical lasers continue to advance, the potential for new and innovative applications in healthcare is virtually limitless

Carbon Dioxide (CO2) Lasers: These lasers emit a wavelength of 10.6 micrometres, making them useful for surgical procedures requiring tissue removal or cutting. Carbon Dioxide (CO2) lasers are used in a variety of medical procedures, including:

• CO2 Laser Resurfacing: This procedure uses targeted beams of light to remove the superficial layer of your skin. It can address cosmetic skin issues, such as fine or deep lines, wrinkles, and acne scars, and treat areas of skin discoloration, like sunspots and age spots.

• Treatment of Skin Conditions: CO2 lasers can precisely remove thin layers of skin with minimal damage to the surrounding structures. They are used to treat sun damage, wrinkles, scars, warts, birthmarks, and other skin conditions.

• Soft-Tissue Procedures: CO2 lasers are best suited for soft-tissue procedures in human and animal specialties. They are used in gynecology, dentistry, oral and maxillofacial surgery, and many others.

• Removal of Skin Lesions and Tumors: CO2 lasers have been used for the removal of skin lesions and the treatment of acne scars.

• Welding Human Tissue: More recently, CO2 lasers have been used to “weld” human tissue in place of sutures

Argon Lasers: These lasers emit a blue-green light and are useful for treating skin conditions and in ophthalmology to treat glaucoma and retinal diseases. Argon lasers are used in a variety of medical procedures, including:

• Narrow-Angle Glaucoma Treatment: An argon gas laser is used for trabeculoplasty for narrow-angle glaucoma. It improves the drainage of the aqueous humor (eye fluid).

• Repairing Retinal Tears and Small Retinal Breaks: Small tears in the retina in individuals with high myopia or other diseases can be repaired with an argon laser. This prevents the risk of retinal detachment in the future.

• Proliferative Retinopathy in People with Diabetes: Abnormal blood vessel growth over the retina in people with diabetes with uncontrolled sugar levels can cause swelling and scarring of the retina. These blood vessels can be burnt with an argon laser, thus improving vision.

• Choroidopathies Treatment: A group of diseases (maybe due to birth defects or acquired causes such as increased blood pressure) can cause abnormal leaky blood vessels to grow over the retina. This causes swelling over the retina. These can be burnt with an argon laser as well.

• Trabeculoplasty: Argon laser trabeculoplasty (ALT) is used to increase aqueous outflow facility through the trabecular meshwork ™ in order to lower intraocular pressure (IOP) in cases of ocular hypertension and glaucoma.

• Dermatological Procedures: Argon lasers have been used to treat ulcers, lesions, and polyps.

• Raman Spectroscopy: This technique is commonly used in chemistry and solid-state physics and has many advantages over microscopic analysis

Diode Lasers: Diode lasers are used in a variety of medical applications, including dermatology, dentistry, and vascular surgery. Diode lasers are used in a variety of medical procedures, including:

• Hair Removal: Diode lasers are commonly used for hair removal procedures.
• Skin Growth Stimulus: They can stimulate skin growth, helping to treat certain skin conditions.
• Tattoo Ablation: Diode lasers are used in tattoo removal procedures.
• Vascular Lesion Treatments: They can be used to treat vascular lesions.
• Dental Procedures: Diode lasers are used in various dental procedures, such as gingival recontouring, gingival depigmentation, periapical surgery, operculectomy, and pro-prosthetic surgical procedures.
• Removal of Oral Benign Lesions: Diode lasers are recommended for the removal of oral benign lesions, such as ranula, mucocele, pyogenic granuloma, gingival hyperplastic lesions, fibrous hyperplasia, and epulis fissuratum².
• Gingivectomy Procedure: Diode lasers are used in gingivectomy procedures, which involve the removal of gum tissue

Dye Lasers: Dye lasers are tunable lasers which can be used in a variety of medical applications, including dermatology and vascular surgery. Dye lasers are used in a variety of medical procedures, including:

• Pulsed Dye Laser Treatment: This treatment minimizes redness in the skin using beams of laser light. These beams target and destroy blood vessels without damaging the surrounding skin. Pulsed dye lasers, such as the Vbeam, are commonly used to treat red-colored malformations (known as port-wine stains), hemangiomas (a birthmark created by a bundle of red blood vessels), red moles (called cherry angiomas), capillaries, and other vascular lesions.

• Laser Eye Surgery: Dye lasers are used in laser eye surgery procedures.
• Dermatological Treatments: Dye lasers are used for dermatological treatments. Their ability to be precisely tuned to specific wavelengths allows for targeted treatment, minimizing damage to surrounding tissues *.

• Spectroscopy and Ultrashort Pulse Generation: With their unique properties, dye lasers have been instrumental in the development of many pioneering laser techniques and have found widespread use in fields such as spectroscopy and ultrashort pulse generation

 

Excimer Lasers: Excimer lasers are used in procedures such as LASIK eye surgery to reshape the cornea and improve vision¹⁴.

Fiber Lasers: Fiber lasers are used in a variety of medical applications, including dermatology, dentistry, and vascular surgery¹⁴.

 

Gas Lasers: Gas lasers, such as helium-neon lasers, are used in a variety of applications, including dermatology and ophthalmology¹⁴.

 

Free Electron Lasers (FEL): FELs are capable of generating high-energy, tightly focused beams of light that can be used for precision surgery and radiation therapy¹.

 

Semiconductor Diode Lasers: These lasers are used in a variety of medical applications, including dermatology, dentistry, and vascular surgery¹⁴.

 

Nd:YAG Lasers: These lasers are used for a variety of medical applications, such as treating varicose veins, removing tattoos, and correcting vision problems. YAG lasers are used in a variety of medical procedures, including:

• YAG Laser Capsulotomy: This is a type of laser eye surgery used to treat cloudy vision after cataract surgery *.

• YAG Peripheral Iridotomy: This procedure is used for the treatment or prevention of a certain type of glaucoma.
• Sealing Leaking Blood Vessels: YAG lasers can be used to seal leaking blood vessels in the eye*
• Reducing Eye Pressure: They can also be used to reduce pressure in the eye.
• Cornea Replacement: YAG lasers can be used in procedures to replace the cornea.
• Iris Removal: Part of the iris can be removed using a YAG laser.

• Dermatological Procedures: YAG lasers are used to treat wrinkles, visible veins, brown spots, and scars. They are also used for laser hair removal and tattoo removal.