For diabetics with a continual glucose intradermal probe inserted, can tefillin be put on the right arm even though the person is right-handed as the probe does not allow the Shel Yad to be put on correctly?

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    – mbloch
    Commented Dec 11, 2023 at 6:41
  • 1
    It will be important to explain to the rav what area of the biceps remains uncovered, if any, as one can sometimes place the tefilin on the left arm, in an uncovered area, without a blessing (Nishmat Avraham)
    – mbloch
    Commented Dec 11, 2023 at 6:45
  • The answer to your question is definitely no, the tefillin has to be on the correct arm. But there's still potentially an interesting question of what to do in this case, but it's hard for anyone to answer since we don't necessarily know what this medical device looks like or where it blocks.
    – Double AA
    Commented Dec 11, 2023 at 12:43
  • Right handed people put tefillin on the left hand
    – Efraym
    Commented Dec 11, 2023 at 19:17
  • @Efraym the question in this case is what to do if the left arm is not "available" because o the medical device covering part/all the area
    – mbloch
    Commented Dec 12, 2023 at 3:58


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