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The French scale, French gauge or Charrière system is commonly used to measure the size of a catheter. It is most often abbreviated as Fr, but can often be seen abbreviated as Fg, FR or F. It may also be abbreviated as CH or Ch (for Charrière, its inventor).
Most vinyl and silicone intermittent catheters with funnels use a universal color-coding system to help you determine what French size a catheter is. See the below chart for the most common French sizes along with their corresponding funnel color codes. Getting the Right Catheter French Size
French sizes of FR 5 or 6 generally fit infants and children while FR 8 to 12 catheters work for most teens. Catheters for men and unisex catheters tend to average around 16 inches (40.6cm) in length.
Typically speaking, the French size for adult women is between 10 and 12, and the range for adult men is typically between 14 and 16, with most men averaging closer to 14. Additionally, children who need pediatric catheterization may use a size that ranges between 6 and 10.
The average catheter size used by adult men range from 14fr to 16fr, and most men use 14fr catheters. The average catheter size used by adult women range from 10fr to 12fr, and most women use 12fr catheters. Catheters are color-coded based on their french sizes: Size 10 french: black. Size 12 french: white.
The French size tells us the circumference of the catheter in millimeters, with each FR number being equivalent to 0.33mm or 0.013 inches. The average urinary catheter size for adult men is 14 FR, while female patients typically have 12 FR catheters, and children can have anywhere from 6 FR to 10 FR, on average.
SpeediCath® catheters are indicated for use by patients with chronic urine retention and patients with a post void residual volume (PVR) due to neurogenic and non-neurogenic voiding dysfunction. The catheter is inserted into the urethra to reach the bladder allowing urine to drain.
Learn how to determine French sizes for urinary catheters. Understanding the right size can greatly improve your comfort and ease of use.
We’ll explore how French sizes are determined, clarify the difference between sizes like 14 and 16 Fr, address common concerns about catheterization, and provide tips for finding the right catheter length.
Whether it’s a 1.88 inch long 20 gauge peripheral intravenous (PIV) catheter or a 13.5 French Mahurkar dialysis catheter, healthcare workers are exposed to both the “gauge” and “French” unit systems almost every day.