Liquid nitrogen cryotherapy of common warts: cryo‐spray vs. cotton wool bud

@article{Ahmed2001LiquidNC,
  title={Liquid nitrogen cryotherapy of common warts: cryo‐spray vs. cotton wool bud},
  author={I. Ahmed and Sanjay Agarwal and Andrew Ilchyshyn and S. Charles-Holmes and J Berth-Jones},
  journal={British Journal of Dermatology},
  year={2001},
  volume={144}
}
Background Viral warts represent a large workload for dermatology departments. Cryotherapy with liquid nitrogen is the most widely used method of treatment by dermatologists and is increasingly used by general practitioners in the U.K. Existing data relating to the response to cryotherapy are virtually all derived from the use of a cotton wool bud as the applicator. There is an increasing trend to use the cryo‐spray to freeze warts and it has been assumed that this is equally effective. In view… 

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References

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It is suggested that swabs should not be dipped repeatedly into the flask of liquid nitrogen but that a small aliquor of nitrogen should be decanted into a smaller ‘clean’ vessel and a new cotton swab used for each patient.

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