Hi, Can I Answer Your Health Question? Please Type Your

Hi, can I answer your health question? Please type your question here...Hi, my dad is 80 years old and three days ago he had a very high fever 39.9celcius and had shivers. He was taken to the doctor and tests showed infection. They targeted kidneys and indeed a strong kidney infection. He started intravenous antibiotics and fever left so far, He was very weak but is better. His test today showed though the creatinine going up from 1.83 to 2.78, Should we hospitalized him or should we wait for the se one round of antibiotics tomorrow morning? Does this high creatinine present a risk? Thank you