A triple lumen catheter is used clinically for bladder irrigation, and the urinary catheter can be removed as soon as the water bladder has been withdrawn all the way. A triple-lumen catheter is a type of catheter specialized for urology, which has an extra lumen at the end compared to a regular catheter. When removing the triple lumen catheter, the water bladder should be completely withdrawn, about 10-15 ml, and then the catheter should be removed slowly. The removal process should be carried out by a professional urologist, with gentle movements, and never use violence, so as not to damage the urethra. Three-lumen catheter in urology is mainly used for bladder flushing, because the lumen is thicker, and the flushing is more thorough, commonly used in persistent hematuria, prostate hyperplasia after surgery, bladder bleeding, bladder electrocautery, etc., which can discharge the blood in time to prevent the formation of blood clots blocking the ureter, and can also reduce bleeding.