Various forms of organisation in the care of patients with akute kidney injury are investigated.

In this prospective study the investigators compare the effect of usual care with the effect of intensive care. Primary endpoint is the development of cardiovascular events ("major adverse cardiovascular events" "MACE").

The investigators plan to investigate the use of various organisation forms in the care of patients with the diagnosis of acute kidney injury in the hospital. This prospective study compares the effect of usual care with the effect of intensive care in the hospital and outpatient health care center. Primary endpoint is the development of cardiovascular events ("major adverse cardiovascular events" "MACE"). Patients with intensive care receive a nephrology consulting report and extensive information about acute kidney injury and the importance of ambulant follow-up care.

The investigators hypothesise a better in-hospital treatment and an improvement of clinical course in the interventional group.

Inclusion Criteria:

• men and women at the age of 18 or older
• acute kidney injury according to KDIGO-guidelines
• The patient (or his/ her authorised representative) is in the position and willing to give informed consent.

Exclusion Criteria:

• Patients, who received kidney transplantation
• Patients on chronic dialysis at the time of enrolment
• Patients who are placed in an institution by judicial or governmental order
• Pregnancy
• Infection with HI- or Infektionen mit HI- oder Hepatitis virus infektion
• Participation in a clinical study with testing on drugs or medical devices (according to German Medicines Law or Medicinal Devices Act)