Good to see you back.
I know having to have a shunt is very overwhelming and scary. but focus on the aim of the shunt because that really helps to keep you positive. If when you're admitted and you feel anxious about your surgery, ask them if you could have a pre med before surgery, it helps you to relax and I have had that myself a few times.
What usually happens is that you will have to go for a pre op assessement first so they can check your bloods, heart, bloodpressure and that kind of thing. They will then run through the procedure with you and give you chance to ask questions, so take someone with you, so they can give you support. They may also ask you to sign a consent form after they have gone through everything.
You will be admitted the day before but they wont be able to tell you where you are on the theatre list till the next day. You wont need a lumbar puncture at this stage. On the day you may be asked to shower and you will be given a gown, surgical stockings which you will have been measured for, and the dreaded paper pants.
After the op you will have a wound on your abdomen and the lumbar part of your spine which will be stapled. You may be in for at least a week, but it depends on your doctors as to when they think you're ready to go home, and this usually happens after you've seen the Physiotherapist or in some hospitals they like you to also see an Ocupational Health Therapist.
When you are sent home you may, or will be given some waterproof dressings and things for the District Nurse, ready for when she comes to see you, she may be the one who removes your staples. Then you just need to make sure you keep them clean and dry till they scar over completely.
You wont be able to do any strenuous activity for a few weeks and bending and lifting are a no no until you're fully healed, which varies from person to person, so keep it to light housework and things. You will be able to do things yourself, it's about being sensible for a while really.
I would take some comfy night things and clothes, such as t-shirts and jogging bottoms or leggings, when you go into hospital, because they wont irritate where your dressings and wounds are. Take a book to read, puzzle books, pens, ipod things like that to keep you occupied, the days are very long in hospital, especially between visitors.
Hope this helps and keep asking questions if you feel you need to, it's why we're here.