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When looking at catheter French sizes, you may have noticed that the little letters “Fr” always come after the number. Ever wonder why? That “Fr” is the unit of measurement for the French Scale measurement system, and it’s responsible for how catheters are sized.

Coated catheters are urinary catheters that have been coated with an additional substance or material. There are different kinds of catheter coatings, and each one services a specific purpose, such as protecting against infection or easing the discomfort of insertion.

The 100% Silicone catheter is a urinary catheter made entirely out of silicone. They contain no latex, which makes them ideal for people with latex allergies or sensitivities.

Red rubber catheters are a type of intermittent catheter used to manage urinary retention. They function just like a straight catheter, except that they are made of red rubber latex instead of plastic. This makes the red rubber catheter a bit more flexible, which some people prefer.

The Foley catheter is a thin, flexible tubes used to pass urine from the bladder. Like other indwelling catheters, Foley catheters are designed to remain in the bladder for a longer period of time. Created by Frederic Foley in 1929, the Foley catheter is currently the most popular type of indwelling catheter used.

The straight catheter, also called an intermittent catheter, is a soft, thin tube used to pass urine from the body. Straight catheters are usually made of plastic (PVC) and are only used one time and then thrown away.

The coude catheter is specifically designed to maneuver around obstructions or blockages in the urethra. Coude is the French word for “bend” or “elbow,” and coude catheters are slightly bent at the tip which helps them move past a blockage.