French gauge

French gauge

a standard set of diameters for round objects such as needles, catheters, rubber tubing. Range from gauge 3 (1 mm) to gauge 34 (11.3 mm). Each gauge unit is approximately equivalent to 0.33 mm diameter.
References in periodicals archive ?
The French gauge dropped less than initially estimated.
A 13 French gauge femoral arterial catheter was sited into the left femoral artery and a 15 French gauge femoral venous catheter into the right femoral vein.
8 mm (1,2) in adults and 21 French gauge bypass catheters are 7 mm in diameter.