What are the different modes of tissue reaction by Laser? What is “swiftlase” and what are their indication in otorhinolaryngology?

The following are the modes of different tissue  reaction by LASER.

a. Photo-ablative Reactions:

  • It occurs when molecule bonds are divided. e.g. ruby laser can split the molecular bonds of tattoo ink c minimal thermal damage. Macrophages remove the tattoo ink after the molecular bonds are broken.

b. Photo-chemical Reaction :

  • occurs when infrared visible or UV laser light interact with photosensitizes to produce chemical and physical r×ns
  • Bans for photodynamic therapy.

c. Photo-chemical Effect:

  • Laser is pulsed to disrupt tissue or stones by the mechanism of slow waves.

d. Photo-thermal reaction:

  • Absorbed laser light is converted to heat producing tissue effect line – cutting, coagulation, vaporization.


Swiftlase is a new technology (swiftlase CO2 laser flash scanner) for char-free ablation of superficial tissue layer.

  • It swirls the focused beam in a 3mm spot thus ablating tissue more quickly.
  • This can be easily installed onto the existing CO2 laser units and provides a high power density.
  • Advantages are :
    • Increase speed and excellent control
    • very shallow thermal damage
    • less post operative pain
  • Indication in otorhinolaryngology:
    • Reduction of nasal polyposis
    • Reduction of hypertrophied inferior turbinate causing nasal obstruction
    • Uvuloplasty
    • Tonsil cryptolysis.
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