Application of liquid nitrogen in dermatology

Liquid nitrogen is also used in dermatological treatments, so how is it applied?

Dermatological liquid nitrogen cryotherapy is suitable for hemangiomas, common warts (hypoparathyroid warts, plantar warts), nodular prurigo, local neurodermatitis, local chronic eczema, keloids, seborrheic keratosis, lichen planus, Kernel keratosis, discoid lupus erythematosus, pigmentation, sebaceous adenoma, basal cell carcinoma, squamous cell carcinoma, etc.

Contraindications: 1. Lesions adjacent to large blood vessels and major neural trunks. 2. Patients with scar quality should be used with caution.


 

Operation method

(1) Contact method: Use a freezing head to directly contact the lesion and freeze.

(2) Spray method: spray the refrigerant directly to the lesion with a fog point.

(3) Penetration method: The frozen probe is inserted into the diseased tissue and frozen.

(4) Pour method: Pour the refrigerant directly into the lesion.

(5) Immersion method: Immerse the lesion directly in the refrigerant. This method is generally used for finger or toe malignancy.

 

  Precautions

1. Patients with palmar plantar warts should be thinned before freezing.

2. If there is bleeding after treatment in patients with hemangiomas, the hemostasis can be compressed with sterile gauze.

3. The freezing dose of the fingers and toes should be small to avoid nerve damage and even bone necrosis.

4. After freezing of hand, foot and facial lesions, there are occasional local numbness, pain, facial paralysis and other neurological dysfunction, which can generally be recovered within 3 months.

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