Carol
                    
                    
                    
                    
                    
                    
                    
                        
                        
                        Hi mm,    I'm an RN and although I don't know what caused your dad's short term memory loss, it is not unusual for persons with kidney problems to have an elevated BUN (blood urea nitrogen) which is basically a waste product.  When this occurs, one becomes confused and disoriented.  I would think, however, that his doctor would be following his BUN closely.  Is he?