Definition: a scale for grading sizes of sounds, tubes, and catheters as based on a diameter of 0.33 mm equaling 1 F on the scale (3 F = 1 mm); grading to scale is carried out using a metal plate with holes ranging from 0.33 mm to 1 cm in diameter.
Synonym(s): Charrière scale
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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.