You mean people are asking about P-valve for women and they are not members of TDS? The site is wealth of information.
I will cross post this then, it is from a long thread about/by men who've gotten very very bad infections from their P-valves, describing raging 104 degree fevers, hospitals, etc.. About how even though the texas catheters are external (not indwelling) when they get backed up, hose pinched, etc.. they can put the user in a WORLD of hurt.
Many people describe the extremes they go to to keep their Valves and hoses as clean as possible... (flushing with bleach, vinigar, detergent, etc...)
Someone then asked about Urine being sterile.
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Normally, urine is sterile. It is usually free of bacteria, viruses, and fungi but does contain fluids, salts, and waste products. An infection occurs when tiny organisms, usually bacteria from the digestive tract, cling to the opening of the urethra and begin to multiply. The urethra is the tube that carries urine from the bladder to outside the body. Most infections arise from one type of bacteria, Escherichia coli (E. coli), which normally lives in the colon.
In many cases, bacteria first travel to the urethra. When bacteria multiply, an infection can occur. An infection limited to the urethra is called urethritis. If bacteria move to the bladder and multiply, a bladder infection, called cystitis, results. If the infection is not treated promptly, bacteria may then travel further up the ureters to multiply and infect the kidneys. A kidney infection is called pyelonephritis.
The urinary system is structured in a way that helps ward off infection. The ureters and bladder normally prevent urine from backing up toward the kidneys, and the flow of urine from the bladder helps wash bacteria out of the body. In men, the prostate gland produces secretions that slow bacterial growth.
That is why in hospitals, when placing indwelling catheters, we go to all the trouble of doing it in a "sterile" fashion, and all the components start out sterile.
This also explains the risk of women trying to use an indwelling catheter and connecting it to a nonsterile P-valve (potential bacteria highway directly into the bladder)