[Treatment, clinical course, and cross-sectoral information transmission in patients with acute-on-chronic kidney injury]. / Behandlung, klinischer Verlauf und sektorenübergreifende Informationsübermittlung bei Patienten mit akut-auf-chronischer Nierenschädigung.

BACKGROUND: Delayed diagnosis and undertherapy of acute-on-chronic kidney injury (AKI-on-CKD) may trigger multiple organ injury and worsen clinical outcome. OBJECTIVES: This study focused on description of in-hospital care and cross-sectoral information transmission of patients with AKI-on-CKD including subgroup analyses (under surgical vs. non-surgical and nephrology vs. non-nephrology care). MATERIALS AND METHODS: At a university clinic, we analysed clinical measures and documentation in patients with AKI-on-CKD. Cox regression was performed to identify independent risk factors for in-hospital-mortality and 180-day mortality. RESULTS: In 38 (25.3%) of 150 patients, progressing AKI-on-CKD was found. Nineteen patients (12.7%) received acute dialysis. Thirty patients (20.0%) died in hospital. Systemic hypotension (n = 76, 50.7%) and nephrotoxins (n = 26, 17.3%), both considered as causes for AKI-on-CKD, were treated in 36.8 and 19.2%, respectively, of affected patients. Fluid balance was documented in one third of patients. Nephrology referral was requested in 38 (25.3%) of patients (median 24.0 h after AKI-on-CKD start). Acute renal complications (n = 74, 49.3%) were an independent risk factor for in-hospital mortality (ExpB 6.5, p = 0.022) or 180-day mortality (ExpB 3.3, p = 0.034). Rarely, outpatient physicians were informed about AKI-on-CKD (n = 42, 28.0%) or renal function follow-up was recommended (n = 14, 11.7% of surviving patients). CONCLUSIONS: Care gaps in therapy and cross-sectoral information transmission in patients with AKI-on-CKD were identified.