I&O can be crucial. If they are not accurate I suggest finding out why and the working to make sure everyone makes sure they are as accurate as possible.
Are prople filling water pitchers and emptying urinals without documenting the amount?
Does dietary pass trays? Then have nursing personnel write down how much liquid was served so the amout the patient drank can later be recorded.
Do you have enough staff? If not work together to convine management that sufficient staff will save money.
One example. My 85 year old husband was drinking too much juice and such at home and at his lodge. Last December he was admitted for exacerbation of CHF. I told his admitting nurse that he needed reinforcement and education on why and how to restrict fluids. The RNs and CNAs coordinated to be very accurate with his I&O. He was made aware of how much he drank.
He came home New years dayu. He has been very good with his restriction.
For about two years before that he began to have leg edema about a month after leaving the hospital and coughing up fluid the second month. He has not needed hospitalization so far this year.
Because hospital reimbursements are less for patients readmitted for the same diagnosis and for hospital aquired infections and decubitus ulcers it is cost effective for hospitals to provide enough staff.
Look at page ten here for research studies: Safety in Numbers -Focus on Ratios