Opened 8 years ago

Closed 7 years ago

#133 closed defect (fixed)

Definition unit for [Ch] gauge of catheters is actually mm/3 not mm/[pi]

Reported by: John Sinclair Owned by: Gunther Schadow
Priority: minor Milestone: Revision 1.9
Component: Keywords: Ch
Cc:

Description

For [Ch] the definition unit of mm/[pi] is wrong it should be mm/3

See http://procurement.ifrc.org/catalogue/charriere.aspx http://www.texloc.com/closet/cl_french_scale.html http://www.alnmag.com/article/infusion-tips-french-gauge-odid-mm-inches-what-does-it-all-mean

For example, a catheter that is 18 Ch, is 6 mm in outside diameter.

Change History (2)

comment:1 Changed 7 years ago by Gunther Schadow

Owner: set to Gunther Schadow
Status: newassigned

We used to have

"One charrière is the gauge of a catheter with a circumference of 1 mm. In the U.S. the charrière is simply called “french”."

But indeed more research shows that actual use seems to assume 3, not any better approximation of pi.

Applied.

comment:2 Changed 7 years ago by Gunther Schadow

Milestone: Revision 1.9
Resolution: fixed
Status: assignedclosed
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