|
|
|
|
|
|
The French scale or French gauge 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, Ga, FR or F. It may also be abbreviated as CH or Ch (for Charrière, its inventor).
Yottameter is an SI device for measuring distance. It is equal to 1024 meters. The symbol for yottameter is Ym.