I cannot speak for this particular condition but I can say I’ve been going through some serious medical stuff lately (major mobility/pain problems and trying to put all my energy into getting to work so I stay employed/insured!), and my family has had to help out, and there are some things I didn’t really think about.
1 - Food. It’s a good idea not just to think of the week you’re there, but extended recovery time too. Some days when I’m very tired, I just can’t even think about making anything, but prepared foods tend to be not great when you’re ill (very high in sodium content) either. One of the best things my family has done is just drop off meals that I can stick in the oven or microwave. When he’s sleeping, maybe make some big batches of stuff that fits an appropriate diet, and freeze them in individual portions. Not just for dinner, either – I need to eat in the morning to get up my strength, but on my worst days that’s also the most painful and weakest time, so having things I can grab and eat are important.
Your tastes can change a lot when not feeling well, so I’d wait to ask him for what kinds of things to make until the actual time.
Keep in mind weight and accessibility. I can’t really handle a gallon of milk, I need smaller containers. Most jars and bottles are also a problem to open, even some other packaging can be rough. Small items covered in foil are easiest.
Also, disposable dishes and silverware are helpful.
2 - Stuff to do. You can’t sleep all day and it gets fantastically boring when you’re limited in how much you can move. Make sure there are accessible things to occupy the mind – not just theoretically, but that can be easily reached from the bed. And have more than one idea. I thought I’d want to read a lot but holding up a book is sometimes hard, so I end up watching or listening to things more often, or using my iPad.
3 - Bedding. As was said, you want multiple sets of linens in case being out of bed too long is uncomfortable. Having lots of pillows is nice too, to prop yourself up if you want to be in closer to a sitting position but aren’t quite ready to get out of bed. I also find that my needs in sleeping positions have changed and so having things like a wedge pillow, body pillow, etc. is nice. I ordered a bunch of stuff via Amazon to make myself more comfortable.
4 - Just being there. It’s lonely and isolating being stuck at home. Things like having dinner together, having conversations about what’s going on with you, it’s helpful. Once you’re gone after a week, too, stay in touch. Seriously, going a whole day in your house with no contact from anyone feels like an eternity after awhile (even for me, a devoted introvert, it’s different when you CAN’T leave). Even just a couple of texts is a very pleasant diversion.
5 - Get ahead of housework and chores. Make sure you’re leaving laundry clean (and accessibly put away), bathrooms and kitchen cleaned, garbage taken out. Is major stuff like cleaning gutters, leaf removal, snow removal covered by someone or hired out? Car maintenance done (it’s easier to recover enough to drive a little to go to the pharmacy than it is to manage going and getting your oil changed)? Mail gone through and bills paid?
6 - Make sure medications are organized. I’m sure he’ll have plenty of prescriptions and they all have different times you need to take them, with food or without food, et cetera. Make sure there’s a list or some system taken care of as it’s very easy to fall out of rhythm when you have a lot of them. Especially under the effects of medication.