Which sheath size is represented by the color red?

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Multiple Choice

Which sheath size is represented by the color red?

Explanation:
Color coding on vascular sheaths is a quick way to identify the French (F) size. The size is essentially the outer diameter, with 1F roughly equal to 0.333 mm, so larger F numbers mean larger diameters. Red is typically used to denote the smallest standard sheath size, which is 4F. Seeing red on the packaging or hub indicates a 4F sheath, useful for quickly confirming size during setup and avoiding mismatches. Other colors generally map to larger sizes, though exact color schemes can vary by manufacturer.

Color coding on vascular sheaths is a quick way to identify the French (F) size. The size is essentially the outer diameter, with 1F roughly equal to 0.333 mm, so larger F numbers mean larger diameters. Red is typically used to denote the smallest standard sheath size, which is 4F. Seeing red on the packaging or hub indicates a 4F sheath, useful for quickly confirming size during setup and avoiding mismatches. Other colors generally map to larger sizes, though exact color schemes can vary by manufacturer.

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