A KTP laser is a solid-state laser that uses a potassium titanyl phosphate (KTP) crystal as its laser medium. The KTP laser medium is energised through a beam generated by a neodynium:yitrium aluminium garnet (Nd: YAG) laser. This is directed through the KTP crystal to produce a beam in the green visible spectrum and has a wavelength of 532 nm.
How does a KTP laser work?
The KTP laser works on the principle of selective thermolysis.
The selected wavelength of laser light is absorbed to a high degree by the target structure (called a chromophore), and is absorbed less by surrounding tissue.
The skin chromophores targeted by the KTP laser are melanin and oxyhaemoglobin.
The pulse duration of laser energy is shorter than the target structure’s thermal relaxation time, which is the time taken for the target to cool by 50% of its peak temperature after irradiation.
This ensures that the impact of thermal energy is limited to the target structure and does not affect the surrounding tissue.
When KTP laser light hits the skin, it is reflected, transmitted, or absorbed.
Absorbed energy is most responsible for the clinical effect because it is converted to thermal energy (heat) by the intended targets (chromophores), thereby killing the target cells.
Complications result when energy intended for the target chromophore is nonselectively diffused and absorbed by surrounding tissues and structures.
The effects of the KTP laser on the skin can be modified by altering the pulse width and degree of cooling.
What is KTP laser used for?
The following skin disorders may be treated with KTP lasers:
- Cutaneous vascular lesions such as port wine stains, cherry angiomas, telangiesctasis
- Pigmented and non-vascular skin lesions such as freckles, melasma, lentigos
- Removal of raised spots such as seborrhoeic keratoses, dermatosis papulosa nigra, skin tags
- Acne and acne scarring
|Treatment Type||Light Therapies|
|Treatment Problem or Condition||Acne Scarring, Active Acne, Age Spots/Sun Damage, Angiomas, Hyperpigmentation/Uneven Skintone, Melasma/Freckles, Port Wine Stains, Rosacea/Redness|
|Skin Type||Acneic Skin, Aging Skin, Hyperpigmented|