The depth of female catheterization depends on the length of the urethra, which should usually be 4 to 6 cm in women, and generally requires insertion of 1 to 2 cm after insertion of the tube to see urine. so that if the catheter is indwelling it can be ballooned and then fixed. If the medical prescription is for disposable catheterization, then the catheter can be removed after the specimen is retained and the catheterization task is completed according to the medical prescription. Strict attention needs to be paid to aseptic technique during the operation, as urinary tract infections can easily occur due to the female physiological anatomy.