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Fig. 1 | Critical Care

Fig. 1

From: Continuous renal replacement therapy in COVID-19—associated AKI: adding heparin to citrate to extend filter life—a retrospective cohort study

Fig. 1

Flowchart of the study population selection process. CRRT, continuous renal replacement therapy; CVVH, continuous venovenous hemofiltration; ACD-A, anticoagulant citrate dextrose solution formula A; RRT, renal replacement therapy; ECMO, extracorporeal membrane oxygenation; AKI, acute kidney injury; COVID-19, coronavirus disease 2019; COV−, not diagnosed with coronavirus disease 2019; COV+, diagnosed with coronavirus disease 2019; UH, unfractionated heparin. *Because there were only 2 patients in this category, which precluded any meaningful analysis, and because the initial study design did not allow for the inclusion of such patients

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