• Shock · Jan 2023

    The effects of early-phase furosemide use on the progression of oliguric acute kidney injury across different central venous pressure: A retrospective analysis.

    • Haoquan Huang, Chuwen Hu, Yanni Fu, Zhixiao Han, Minghui Cao, and Ganglan Fu.
    • Department of Anesthesiology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China.
    • Shock. 2023 Jan 1; 59 (1): 495749-57.

    AbstractBackground: Furosemide is a commonly used loop diuretic in critical care. However, its effect on the progression of oliguric acute kidney injury across different central venous pressure (CVP) remains unknown. This study therefore aims to investigate the association between furosemide 6-12h (defined as the use of furosemide within 6 h after the diagnosis of AKI according to the urine output [UO] criteria set by the Kidney Disease: Improving Global Outcomes [KDIGO] guidelines) and the progression of AKI across different CVP 6-12h (defined as CVP within 6 h after the diagnosis of AKI by the KDIGO UO criteria) levels. Methods: Patients involved in this study were identified from the Medical Information Mart for Intensive Care IV database with the following criteria: (i) adults with UO <0.5 mL/kg per hour for the first 6 h upon admission to the intensive care unit (ICU) (meeting stage 1 AKI by UO) and (ii) CVP 6-12h ranging from 0 to 30 mm Hg. From there on, the target primary outcome would be progression to stage 3 AKI by UO among these chosen patients. The secondary outcome was 28-d mortality since ICU admission. The risks of severe-stage AKI progression and 28-d mortality were respectively examined against furosemide 6-12h (vs. without furosemide 6-12h ) within the full cohort and across different subgroups of CVP 6-12h , using multivariate adjusted logistic regression and inverse probability treatment weighting (IPTW). Sensitivity analyses were performed to assess the robustness of our findings. Results: One thousand one hundred eighty patients were ultimately selected for this study, of whom 643 (54.5%) progressed to stage 3 AKI from stage 1 based on the UO criteria by KDIGO. Multivariate analysis showed that furosemide 6-12h is significantly associated with this severe-stage progression within the full cohort (odds ratio [OR] was 0.62 at 95% confidence interval [CI] of 0.43-0.90, P = 0.011). After dividing the patients into CVP 6-12h subgroups according to their CVP during the early phases, lower risk of AKI progression was observed only in furosemide 6-12h application at CVP 6-12h of ≥12 mm Hg (adjusted OR was 0.40 at 95% CI of 0.25-0.65, P < 0.001), as confirmed by the IPTW analysis (OR was 0.47 at 95% CI of 0.29-0.76, P = 0.002). The robustness of these findings was confirmed by sensitivity analyses. In addition, for patients with CVP 6-12h ≥12 mm Hg, furosemide 6-12h is also significantly associated with lower risk of 28-d mortality (adjusted OR was 0.47 at 95% CI of 0.25-0.92, P = 0.026) in the multivariate logistic regression analysis, and there was a similar trend in the IPTW analysis (adjusted OR was 0.55 at 95% CI of 0.28-1.10, P = 0.092). Conclusions: Among the identified early-stage AKI patients in critical care, the use of furosemide was associated only with lower risk of oliguric AKI progression and 28-d mortality within the high CVP group. These findings suggest the potential of CVP as a guidance or reference point in the usage of furosemide among early-stage oliguric AKI patients in the ICU.Copyright © 2022 by the Shock Society.

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