It depends on your situation: why you're there, how long you'll likely be there, what section you're in, etc. In the ICU you'd have to wear a gown. In the heart section you'd have to wear a special gown that holds the box and has a slit to let the wires through. In most post-surgical cases, unless it's a toe or such, you'd be in a gown so they can examine the wound and/or change the bandages easily. If you have a Foley, you'd definitely be in a gown. Aside from those areas, you can usually wear your own pajamas. Just remember that you must have an open line - e.g. an IV, PICC line, or Port-a-cath. So bring loose, short sleeved tops (whatever bottoms). Long sleeved shirts and IV lines don't mix well. No long nightshirts (or gowns) for the same reason. Oh, and don't bring your favorite ones. IV lines can come loose - rarely, but still. If it happens in your sleep you'll likely wake up soaked in various IV fluids mixed with some blood. It's both gross and hard to get out of your pajamas.
Generally you can wear normal clothing. Depends on what you are being treated for. You may also be asked to wear the gown over the PJs
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