Snippet from the article:
The machines work by lowering the temperature of the head and scalp by a few degrees before, during and after chemotherapy.
This reduction in scalp temperature restricts the amount of blood reaching the hair follicles protecting them from the effects of chemotherapy drugs in the bloodstream, meaning that hair loss is not inevitable.
Although the scalp coolers have been around for some years some hospitals still do not have them, or if they do, they do not have enough of them to save everyone’s hair.
Read the full story at BBC News
The article also mentions that this isn’t an appropriate treatment for all cancers or chemotherapy drugs, but I still would worry a bit about lowering body temperature due to the scalp’s very high blood supply. Just a thought though, as this is an interesting piece.