Feeling that necrosis produces less scarring, cryosurgery by liquid nitrogen - 196°C has become a good tool in the practice of dermatology. Easily available, the technique is easy to perform and post-operative wound care is simple. Useful in patients allergic to local anesthesia and people who are afraid of surgery. Less popular is cryosurgery by nitrous oxide and CO2 snow.
Tissue Sensitivity :
|More sensitive tissues||Less sensitive tissues|
Depth of freeze: Controlled by rate of flow and the distance of the spray unit from the lesion and the time of contact. Development of freezing (circle) and then thawing help to decide the duration of exposure.
1. Storage tank/cylinder
2. Cotton swab
4. Spray unit
5. Thermocouple devices
Basal cell epithelioma
Most important is depigmentation and scar formation which is seen more frequently. Post-operative oedema, bullous formation and a throbbing sensation may be seen.
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|Laser surgery||Liposuction surgery||Radiotherapy||Ultra violet||Curettage & cautery|
|Skin Biopsy||Skin grafting||Diathermy||Hair transplantation||Tissue Tightening Treatments|
Microlipoinjection (Fat Transfer)
Photodynamic Therapy (PDT)
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