Some cancer patients have a stoma. This means they don't breathe through their mouth or nose but through a tube cut into their throat. It is covered by a filter which has to be changed daily. Water getting into the tube would go straight to the lung which would be fatal. It is not really a tube but the original airway cut into the throat. Some do have a tube fitted to keep it open but it is not always necessary.

How can such patients immerse into a mikva? I suppose it is possible to straight away pump the water out, but it still would be very dangerous. Although this is not necessarily a halacha question but more likely a practical question it is still very relevant.

  • Offhand, I'm not sure if full immersion is needed. I.e., you might fulfill the requirement without immersing your head. If this is permitted, would this solve the problem for you?
    – DanF
    Commented Nov 22, 2017 at 17:25
  • 1
    @DanF no part of the body can be above water. Parts could sometimes be covered and be underwater (cf. the laws of Chatzitza), but never above water.
    – Double AA
    Commented Nov 22, 2017 at 17:44
  • This case seems very similar to R Moshe's case of water in her ears
    – Double AA
    Commented Nov 22, 2017 at 17:50
  • Could the tube be covered during immersion? Wouldn't work with a finger but maybe the tube can be closed for a few seconds?
    – mbloch
    Commented Nov 22, 2017 at 17:52
  • 1
    Sounds like a question for your local Orthodox rabbi.
    – ezra
    Commented Nov 22, 2017 at 17:53


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