Hello!
I’m a nurse that specialized in home dialysis.
You will not need a waterproof mattress cover. The catheter should not leak.
In PD, you always want to remain a closed system. The fresh fluid and your catheter should never be open to air or environment. If the catheter is leaking, or becomes disconnected, you will know it before there is a large amount of fluid spilled. Even more than that, your biggest worry were you to wake with warm fluid leaking out of an exposed catheter is infection.
It should really never happen. Make sure your connections are nice and tight and make sure that you never put sharp things (like scissors) near your tubing.
Everything that you need to do PD safely at home will be provided to you. This includes your scale, machine, tubing, gauze, dressings, tape, hand sanitizer, masks, ointment, heating pad, cleaning supplies, BP cuff, etc.
Some PD patients do not using tape alone to secure their catheters to their bodies. Some don’t like the belts the clinic provides because they find them stiff. If that’s the case, you can buy a more comfortable belt online. This website also has fun little (not needed, but good to have) accessories that make showering and keeping your drain line in the proper place: kidneystuff (dot) com
Your clinic may or may not provide you with liquid soap. I (personally) feel that liquid soap and paper towels should be in everyone’s home already. You’ll need those though- never dry your hands on a towel! A flashlight nearby. A timer of some kind (Siri, Alexa, Google are good friends of PD). GOOD LIGHTING is a MUST!
It’s helpful (but not necessary) when doing manual exchanges to get one of those plastic bins that are on wheels and fit under the bed. They hold 4 bags of fluid (one day for most people) and you can arrange them on top of your heating pad and rotate bags in/out as you use them so you always have fluid ready at the right temp when you want it.
Some people like to have tray tables to set up supplies up on exclusively. Other use a surface they already have. Think about what may be your best system for that. Are you OK with your supplies being stored in original packaging or cartons or do you want it organized in bins or containers? That’s all up to you.
You will have to take stool softeners or laxatives. Your insurance may cover OTC medications, not sure. Worth an ask. If you have a cat, you’re going to need a bag of Temptations so you can get them out of the room for connection. Some patients like to use a bucket for fluid collection (you do a test every 3 months where you drain into bags instead of an actual drain) and a mop bucket on wheels works fine if you want to do it that way.
My dad (a CCPD patient) put a recliner chair, side table, lamp, mini-fridge, TV and books in the corner of his bedroom so that if he was having trouble sleeping, he could go hang in his chair without having to disconnect. Great set-up. Totally not necessary (you really don’t NEED anything aside from what is provided) but if you’d like some creature comforts, that’s completely understandable given how much time you’ll be spending on treatment.