Urinary bag is a disposable product, generally the bag is changed 1-2 times a week, during the use of the bag is not necessary to disinfect. Long-term indwelling urinary catheter needs to be disinfected is the urethral opening, commonly used urethral disinfectant for povidone-iodine, followed by levano solution can be used. 1. Povidone-iodine: a very common disinfectant, povidone-iodine has a very good bactericidal disinfection effect. Povidone-iodine has a very good bactericidal and disinfectant effect. Povidone-iodine has a very weak irritant and does not easily damage the urine bag. 2. Levano solution: it is a topical bactericidal antiseptic, with strong killing effect on gram-positive bacteria and a few gram-negative bacteria, and strong antibacterial effect on cocci, especially streptococci. Whichever disinfectant product you choose, it is important to find out how to use it and what precautions to take to avoid repercussions. Visit a hospital or consult a medical professional if necessary.