In terms of application scenarios, pre-filled catheter flushing devices are particularly suitable for long-term indwelling catheters such as central venous catheters, urinary catheters, and dialysis catheters. Their rapid flushing characteristic reduces the incidence of catheter blockage and infection, thereby lowering the risk of complications for patients. For healthcare personnel, the use of this device greatly simplifies the operating procedure and saves time, which is especially important in emergency situations.