I also think you're counting right (with Day 1 being the first day chemo is administered).

I suppose you could ask about having him get a liter or two of IV saline for hydration when you go to have the pump disconnected, and if nausea is an issue, maybe repeating some of the IV pre-meds. My pre-med mix switched out the Zofran and replaced it with Aloxi, which is supposed to stay active in your system longer.

Managing nausea is key to keeping an appetite, maintaining weight, and getting food for energy. Managing hydration helps flush out the chemo and contributes to feeling better in general. Whatever weird symptoms or wacky questions come up don't be too shy to ask about them.

One other weird side effect I experienced from Folfirinox was an occasional muscle spasm where one finger would sort of lock up fully extended or partially bent backward. Sometimes I would get a similar spasm in one toe, or in the sole of my foot. Pulling it back out and straightening it manually, plus a little massage would relieve it.

Random thought -- I don't remember if there's a diabetic aspect to your husband's condition, but it might be worthwhile to track blood sugar issues. Steroids in the pre-meds (and any after-meds like dexamethasone) can drive blood sugar through the roof and affect energy levels in weird ways.