[Investigation about the present status of renal replacement therapy in department of intensive care unit in Tianjin].

To understand the current state of renal replacement therapy (RRT) in intensive care unit (ICU) of Tianjin public hospital, and to provide scientific evidence and direction for homogenized management and overall level improvement of RRT in Tianjin.The questionnaires were distributed to the chief or key staff of 33 ICUs from 32 public hospitals in Tianjin by clinical quality control center for critical care medicine of Tianjin and ICU of Tianjin Third Central Hospital. The RRT data of ICUs from January 2020 to December 2021 was collected, including the type and size of ICU, the number of patients undergoing RRT, reasons for initiating RRT, the RRT modes, the anticoagulation and the complications of RRT and so on.A total of 33 valid questionnaires were obtained, with a recovery rate of 100%. The result showed that there were 38 803 patients admitted to the selected ICUs during investigation, and 5 456 of them (14.06%) received RRT. In most ICUs, the reasons of initiating RRT were renal failure, sepsis and volume overload. The mode of RRT was mainly continuous venovenous hemofiltration (CVVH), which was followed by continuous venovenous hemodiafiltration (CVVHDF). Carbonate replacement fluid was the first choice. Heparin was the dominant anticoagulant, and there was an increasing trend in the use of citrate anticoagulation simultaneously. However, heparin-free anticoagulation used mostly in bleeding patients. Overall, the RRT modes and anticoagulation methods were single. Thrombosis was the main iatrogenic factor interrupting RRT in most ICUs, and also the reasons for complications related to catheter or circulation pipeline. It still showed an ineffective anticoagulation of RRT even after increasing the dosage of anticoagulants.RRT is an important organ support method in ICU, which has been widely carried out in ICUs of Tianjin and continues to expand. Despite the positive performance, it still needs to be improved and standarized in some aspects, such as the diversification of RRT modes, anticoagulation, and the complication prevention.