Talk:French catheter scale: Difference between revisions

Medicine Start‑class Low‑importance

This article is within the scope of WikiProject Medicine, which recommends that medicine-related articles follow the Manual of Style for medicine-related articles and that biomedical information in any article use high-quality medical sources. Please visit the project page for details or ask questions at Wikipedia talk:WikiProject Medicine.MedicineWikipedia:WikiProject MedicineTemplate:WikiProject Medicinemedicine articles Start This article has been rated as Start-class on Wikipedia's content assessment scale. Low This article has been rated as Low-importance on the project's importance scale.

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

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. Does anybody agree ?

• 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...

I think the description is perfectly clear. Fr measures diameter, NOT circumference. I just verified this with the engineers around here (a medical device company; we make catheters in this department). —Preceding unsigned comment added by 65.173.1.45 (talk) 20:28, 7 May 2008 (UTC)[reply]

The chart page is redundant- the graphic contains all of the info needed. The reference to the circumference is just plain wrong- the definition is 3 times the OUTSIDE diameter in millimeters, rounded to the nearest whole number. You will sometimes see things like 7.5 Fr, which makes me crazy. Sorry, doctors are not engineers! —Preceding unsigned comment added by Wa9kws (talk • contribs) 20:25, 12 September 2008 (UTC)[reply]

I cannot believe how hard it is to find the lumen (inner diameter) of these catheters and cannulas. What are the inner and outer diameters? 162.207.203.26 (talk) 17:50, 7 April 2020 (UTC)[reply]