Cryo surgery implies destruction of diseased tissues by use of very cold producing substances. The implication is that cold produced tissue necrosis results in less scarring as compared to heat and chemicals.
- (Liquid Nitrogen- temp achieved –190`C. Liquid Nitrogen appears to be first choicebecause of the achievement of very low temperature , is faster and has deeper destruction.
- Co2 snow, Ice slush temp achieved -9`C . Less effective compared to Liquid Nitrogen.Good for Facial warts or Rhinophyma.
Indication of Cryosurgery
- Molluscum contagiosum
- Nodulo Cystic lesions of acne
- Liquid Nitrogen is stored in a container from which it can be taken out either in a Vacuume flask or in a Cryojet fitted with different spray nozzles. Cotton tipped sticks are dipped in to the flask & applied till the tissue become frozen & extending upto peripheral area of 2 –3 mm around the lesion. Freezing is repeated again when the frosting clears. 2 – 3 applications are required for larger lesions.
Complication and side effects
- Pain is - common: Analgesics if required
- Infection – occasional
- Hypo/Hyper pigmentation
- On the whole cryosurgery is fast, comparatively painless, bloodless and gives fairly good cosmetic results