Periprocedural Oral Hydration Patterns and Early Renal Function after Coronary Angiography and Intervention: A Prospective Real-World Cohort Study

Periprocedural OH was generally ample and formed two reproducible patterns. Concentrating oral intake in the first 6 h increased early urine output and positive fluid balance but did not show a significant dose-response association with early serum creatinine change. This null result should be interpreted cautiously because the cohort was generally low-risk, follow-up was short, and the study had limited power. Future studies should validate whether early concentrated OH protects renal function using earlier sensitive biomarkers and by targeting high-risk patients.