Which laser type is characterized by its ability to cut tissue with a specific color light?

• A. Argon laser
• B. KTP laser
• C. Nd:YAG laser
• D. Diode laser

Answer: (B)

The KTP (potassium titanyl phosphate) laser is distinguished by its specific ability to cut tissue using a green light wavelength, which is around 532 nanometers. This wavelength is particularly effective for various procedures, especially in dermatology and surgical applications, as it is well absorbed by hemoglobin and melanin. This property allows for efficient cutting and coagulation of tissue with minimal thermal damage to surrounding structures, making it valuable in a range of medical treatments.

The argon laser emits blue and green light but is not as commonly associated with cutting tissue as the KTP laser is. The Nd:YAG (neodymium-doped yttrium aluminum garnet) laser has a longer wavelength that is absorbed differently, making it preferable for deeper tissue penetration rather than specific cutting. The diode laser, on the other hand, has a range of wavelengths and applications but typically does not target tissue in the same manner as the KTP laser, which is known specifically for its effective cutting properties using a particular color light.