Just seen your previous post, seems you've already petitioned your mother? So a B is far less likely to be granted, as she's shown immigrant intent. https://www.visajourney.com/forums/topic/830853-filed-for-mom-but-she-is-sick/#comment-11057496
You can try, but be prepared for it to be refused. Also, you do need to show funds for the medical care (as mentioned in the link above), as explained in your last thread, your insurance wouldn't normally cover your mother's care. So you'll need to have cash in the bank, that kind of treatment isn't going to be cheap.
When did you file the I-130 for your mother?