OBJECTIVE: The authors sought to evaluate the association between the time interval from contrast administration to cardiac surgery and postoperative acute kidney injury (AKI). DESIGN: A retrospective observational study over a 1-year period. SETTING: A US academic medical institution. PARTICIPANTS: Six hundred forty-four adult patients undergoing nonemergent cardiac surgery. INTERVENTIONS: No interventions were performed as part of the study. MEASUREMENTS AND MAIN RESULTS: AKI was defined as an increase in serum creatinine by ≥0.3 mg/dL or ≥50% above baseline within the first 2 postoperative days or the commencement of renal replacement therapy within the same period. Using a contrast-to-surgery time interval >7 days as the baseline, multivariable logistic regression analysis determined the association between a contrast-to-surgery time interval ≤1 day or 2 to 7 days and postoperative AKI adjusting for potential confounding variables. The incidence of AKI within the study cohort was 21.9%. After adjusting for other covariates, there was no association between the contrast-to-surgery time and AKI (odds ratio [OR] ≤1 day = 0.93; 95% confidence interval [CI], 0.52-1.66; p = 0.81; OR = 2-7 days = 1.28; 95% CI, 0.78-2.11; p = 0.34). CONCLUSIONS: In an appropriately selected population, cardiac surgery can be performed within 1 day of cardiovascular catheterization and contrast administration without an increase in the incidence of postoperative AKI. Recommendations to delay cardiac surgery for a specified period after contrast administration to reduce the risk of postoperative AKI are premature. Additional evidence is required before making recommendations on optimal surgical timing after contrast exposure.
OBJECTIVE: The authors sought to evaluate the association between the time interval from contrast administration to cardiac surgery and postoperative acute kidney injury (AKI). DESIGN: A retrospective observational study over a 1-year period. SETTING: A US academic medical institution. PARTICIPANTS: Six hundred forty-four adult patients undergoing nonemergent cardiac surgery. INTERVENTIONS: No interventions were performed as part of the study. MEASUREMENTS AND MAIN RESULTS: AKI was defined as an increase in serum creatinine by ≥0.3 mg/dL or ≥50% above baseline within the first 2 postoperative days or the commencement of renal replacement therapy within the same period. Using a contrast-to-surgery time interval >7 days as the baseline, multivariable logistic regression analysis determined the association between a contrast-to-surgery time interval ≤1 day or 2 to 7 days and postoperative AKI adjusting for potential confounding variables. The incidence of AKI within the study cohort was 21.9%. After adjusting for other covariates, there was no association between the contrast-to-surgery time and AKI (odds ratio [OR] ≤1 day = 0.93; 95% confidence interval [CI], 0.52-1.66; p = 0.81; OR = 2-7 days = 1.28; 95% CI, 0.78-2.11; p = 0.34). CONCLUSIONS: In an appropriately selected population, cardiac surgery can be performed within 1 day of cardiovascular catheterization and contrast administration without an increase in the incidence of postoperative AKI. Recommendations to delay cardiac surgery for a specified period after contrast administration to reduce the risk of postoperative AKI are premature. Additional evidence is required before making recommendations on optimal surgical timing after contrast exposure.
Authors: Mitra K Nadim; Lui G Forni; Azra Bihorac; Charles Hobson; Jay L Koyner; Andrew Shaw; George J Arnaoutakis; Xiaoqiang Ding; Daniel T Engelman; Hrvoje Gasparovic; Vladimir Gasparovic; Charles A Herzog; Kianoush Kashani; Nevin Katz; Kathleen D Liu; Ravindra L Mehta; Marlies Ostermann; Neesh Pannu; Peter Pickkers; Susanna Price; Zaccaria Ricci; Jeffrey B Rich; Lokeswara R Sajja; Fred A Weaver; Alexander Zarbock; Claudio Ronco; John A Kellum Journal: J Am Heart Assoc Date: 2018-06-01 Impact factor: 5.501