My girlfriend tried this when she was getting chemo. The logistics were pretty daunting - buy a cooler full of dry ice in the morning, show up at the hospital,

My girlfriend tried this when she was getting chemo. The logistics were pretty daunting - buy a cooler full of dry ice in the morning, show up at the hospital, and then keep changing caps on the half hour, out of a huge wheeled Igloo cooler. We had to monitor their temperature with a big gun-style IR thermometer, and it was very difficult to keep them in the range where they were both still pliable and cold enough to be effective. Cold caps were an excellent way to make an already miserable experience much worse. She gave up after three chemo sessions.