It seems like you might be referring to a “Charrière” in the context of surgical instruments. A Charrière, often abbreviated as Ch or CH, is a unit of measure used to denote the diameter of cylindrical instruments, particularly in the medical field. It is named after the French instrument maker Joseph-Frédéric-Benoît Charrière, who standardized the system of instrument sizing in the 19th century.
In the context of bone surgery, instruments such as drills, taps, reamers, and other tools used for bone preparation and fixation are often labeled with Charrière sizes to indicate their diameter. For example, a bone drill with a diameter of 3 millimeters might be labeled as “3 Ch” or “3 CH.”
The Charrière scale is logarithmic, meaning that each successive size represents a doubling in diameter. For instance, a Charrière size 12 instrument has a diameter twice that of a Charrière size 6 instrument. This scale allows for a standardized method of instrument sizing across different manufacturers and ensures compatibility between instruments and accessories.
In summary, Charrière sizes are used to specify the diameter of cylindrical surgical instruments, including those used in bone surgery. Understanding Charrière sizes is important for selecting the appropriate instruments for specific surgical procedures and ensuring compatibility between instruments and accessories
Reviews
There are no reviews yet.