Talk:French catheter scale

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Somebody know where I can find mor infirmation from this issue? Thanks to all.

very confusing

I find the description very confusing. according to what is written here, the French scale gives the circumference and to get the diameter, one divides the French size by pi (3.14159 ...) . This does not agree with the conversion table given in the attached picture. The scaling factor is more like F = 3 * mm. Any body agrees ?

I agree, this is somewhat confusing. It's as though it was written by someone who either doesn't know the subject matter very well, or doesn't quite know how to write clearly. Perhaps this is a result of sloppy editing...? —Preceding unsigned comment added by 71.239.133.107 (talk) 17:25, 18 September 2007 (UTC)[reply]

- I also agree the article is very confusing and in contradiction to information I have learned... In respiratory care we frequently use catheters which come in French sizes, we were taught the conversion is (French/3.14)*2... so a 14fr would be 8.9mm or 9mm...