Creatinine elevation from 2. 04 to 2. 8.

My father had congestive heart failure from 2020 may , he done bypass surgery in 2019 september, his creatnine levels are low till 2024 , highest value in 2024 is 1.9.in 2025 august his creatnine level was 2.04 and he had some fast breathing issues in late November and December , december he was admitted in hospital , and they said fluid overload was the reason and treated him with lasix effusion , during that time creatnine was elevated to 2.7, urea 71 later decreased to 2.58 , again in February 2026 we came for follow up , creatnine was 2.60 and urea 50 . With mild plueral effusion, treated with lasix and zytanix 2.5.. now his creatnine level 2.83 and urea 58. Will it decrease below 2.5? Vyamada stopped , isolazine is given , spot urea creatinine 12.6, protien creatinine ratio 6.83. what should he do to to maintain healthy kidney and can creatnine level be maintained or lowered , pls help us ,