There are few reports of acute kidney injury (AKI) associated with influenza viral infection. We treated a case of AKI that developed after an influenza B viral infection. A 35-year-old man visited a local physician for a fever and was diagnosed with influenza B. He was prescribed laninamivir, then returned to the physician 5 days later with dyspnea and was referred to Hospital A. Upon admission, respiratory arrest developed, for which he received tracheal intubation and mechanical ventilation. AKI was noted after admission and the patient was transferred to our hospital the next day. AKI and disseminated intravascular coagulation (DIC) were present at the time of transfer, thus a transfusion and continuous hemodiafiltration (CHDF) were performed, and administrations of thrombomodulin alpha and antithrombin III were initiated. Although the patient had DIC, AKI, and disturbance of consciousness, and was in a clinical state resembling influenza-associated encephalopathy, there was no clear abnormality shown in CT scans of the head. Urine output, renal function, and respiratory condition gradually improved, thus CHDF was stopped and extubation performed. The patient had no complications and was discharged on hospital day 22. Some reports have been presented regarding cases of AKI due to rhabdomyolysis associated with influenza viral infection, whereas our patient developed AKI as a complication of an influenza B viral infection without rhabdomyolysis or hemolytic uremic syndrome. Influenza B may cause AKI and DIC, and affected patients can be in a serious condition requiring immediate attention.
Keywords: AKI; CHDF; DIC; Influenza B; PMMA.