K.B.
I work for a healthcare organization with numerous hospitals and clinics. On each of the units, they have Wow cards that parents of patients or the patients themselves can feel out to express their feelings to the nursing staff. Since your infant is no longer in the hospital, you could send a card or letter/both to the Nurse Adminstrator of that particular hospital or a Charge Nurse of that unit and mention some names you remember, the treatment and the unit in which your child was on or just Thank the entire nursing staff. You could also send flowers w/a simple card-That states "Thank you for taking such wonderful care of_______(child's name) when he was here. You are an amazing nursing team." They could display it at the nurses station and all staff members would get to enjoy it.