How long should I be in the hospital?

My dad was readmitted into the hospital. They needed to plug something? for a pleural effusion, first needing to get his blood work correct from his blood thinners (10?). They said his blood work was good Friday night but because it was a holiday weekend, they were not going to do the procedure until Monday. He was in the hospital for seven days. 

The staff should tell me or write down the lab and value they were monitoring, the name of the procedure, or I should have recorded with my phone. The procedure should have been done when his blood work was stable so he could go home for the holidays. 

The number of days as an inpatient is public knowledge. My dad should only have been in the hospital for
4-5 days; I could have called case management or the Chief Experience Officer for the hospital. ​[see resources, file for # days in the hospital]