Q. Is it necessary to stand during the saying of Selichos or is it enough to do so only when reciting the 13 Middos?
Can one laying on a stretcher in a hospital minyan recite the 13 middos?

A. Poskim write that it is preferable to stand while reciting Selichos. However when it is difficult due to age or health issues one should try at least to stand for the Yud Gimel Middos.

Horav Shlomo Miller’s Shlit’a opinion is that if one is unable even to seat when in the stretcher, one may recite the Yud Gimel Middos. However, if possible he should lift the back of the stretcher a bit
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Rabbi A. Bartfeld as revised by, Horav Dovid Pam, Horav Aharon Miller, Horav Chanoch Ehrentreu and Horav Kalman Ochs Shlit’a