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 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.
This article is about the stringed musical instrument. For other uses, see Cello (disambiguation). The cello (/ËtÊÉloÊ/ CHEL-oh; plural cellos or celli) or violoncello (/ËvaÉªÉlÉnËtÊÉloÊ/ VY-É-lÉn-CHEL-oh; Italian pronunciation: [vjolonËtÊÉllo]) is a bowed string instrument with four strings tuned in perfect fifths. The strings from low to high are generally tuned to C2, G2, D3 and A3, an octave lower than the viola.
Also, holes shaped like the letter âfâ are on the front of the cello, and these holes play an integral role in the celloâs sound. A decoration known as âpurflingâ helps preserve the integrity of the cello, helping to protect the instrument from weathering damage and cracks. The Neck and Strings of the Cello. The neck of the cello extends above the huge body. Attached to the neck is the fingerboard and various other parts to fashion the strings on. Cellists can choose from a wide array of strings, mostly made of metallic materials wound around a gut, metal, or synthetic core.