The French scale or French gauge system is commonly used to measure the size of a catheter. It is most often abbreviated as Fr, but can often be seen abbreviated as Fg, Ga, FR or F. It may also be abbreviated as CH or Ch (for Charriere, charriÃ¨re its). Inventor The french = size 3 times the diameter in. millimeters round catheter of 1 French has an external diameter of 1â3 mm, and therefore the diameter of a round catheter in millimetres can be determined by dividing the French size by 3: D (mm) = Fr / 3. or. Fr = D (mm) * 3. For example, if the French size is 9, the diameter is 3 mm.
The violin has the highest pitch range of all the string instruments. 5 people found this useful.
Learn about the range of the sax in this Howcast video. So this is an alto saxophone, and itâs range is an octave and a half, technically. Low âBâ flat is the lowest note that you can play on the horn, and the highest note that you can technically play is an âFâ. Now, in constant pitch that is âDâ flat ledger lines below a treble stave, up till âAâ flat above the stage.