Hello
My husband is totally vent dependent and he still gets a shower 3x a week. We don't use a shower chair, mostly because they are too big and bulky and they lean him back. I didn't want him to lean back for fear the water would get in his traech. First, your concern about protecting the vent. We use the travel vent. Our DME provider automatically includes a 2nd trilogy vent in the monthly rental. Even when we have used the regular vent, we do it the same way. I make sure the vent is covered with a towel and outside the shower. There is nothing else I need to do with the vent.
Yes, we did covert the bathroom, we tore out the bathtub and built a tile shower in its place, one that has just a 1 inch lip that we can lift the chair up and over.
Next is him. back to the shower chair, not shower chair. We use a bar height outdoor swivel mesh chair. They are the kind you see everywhere for summer outdoor furniture. We picked this mostly because it drains water, swivels and is a good height to transfer him from. The transfer to it it just like to a wheelchair. We put a pillow case under his bottom so we can hold it on either side and adjust him back further. His final position in the shower is with his head bent forward, the shower water can hit is neck and we have a splitter on the shower head, so there is a hand held I use to wash him down. He is down to literally no trunk control, but this position allows me to put his elbows up if needed so he doesn't fall forward. Even when he is extremely weak, I don't seem to have a problem with him falling forward.
I forgot to mention he also has a peg tube.
The shower from here is just basically like every shower. I start under his arms with soap, and under his private parts with soap, then use a soft sponge for the rest. Since his head is forward, we can even easily wash his hair.
I keep his traech tie dry by putting a small plastic grocery bag around it.
After the shower, I need 4 towels. I put one down his back to get that dry, I put one each over each shoulder and covering the arms to keep him warm and start drying those parts, then use the 4th towel to dry all over.
I see you use a sling, maybe that can transfer him into the "shower" chair. I am lucky and have someone else here at all times, so we still do a 2 person transfer.
I hope you can use some of my experience to try to set up some type of shower for your PALS. I do it 3x a week and if my back is really hurting, I just forgo it for the day.
I don't know you or the other people on this forum, but I love you all for what you are going thru. Take care. Mary