can people die during a sleep test ??

I'm so worried my mom is having a sleep test going on right now from 9 pm to 6 am at this sleep station to run test and see why she hasn't been breathing right I heard some people died during this test they put hundreds of wiring on a person during I'm so scared i love my mom so much i would die if something happened to her I'm praying so hard right now please someone tell me can people actually die during this test ???? The last thing my mom told me was if I die I want u to know I love u so much 😥😥😥😥😥