2.4. Masking
bleeding, catheter occlusion
BLEEDING, SUBCUTANEOUS HEMATOMA
In this study, 2 nurses in the venous configuration center are responsible for marking test numbers and preparing locking fluids. No further cover-up is required because both types of locking fluids are colorless and odorless. The prepared locking solution is distributed to highly skilled and experienced ICU nurses who specialize in critical care. These nurses undertake the responsibility of performing the catheter locking procedure with utmost proficiency and expertise. Two additional investigators are tasked with the rigorous observation and systematic collection of clinical data. It is imperative that both investigators independently confirm the positive results (catheter occlusion, bleeding around the puncture site and subcutaneous hematoma) to ensure their validity and reliability. During the study, only the 2 nurses who prepare the tube-locking solution knew about the grouping situation, while the subjects, operators, investigators, and statisticians are all unaware of the grouping situations (