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The French catheter scale, also known as French gauge or Charriere (Ch) after the creator of the measurement scale, is commonly used in describing the diameter of medical devices/tubing. It was developed in the 1800's by a French surgical instruments maker, Joseph-Frederic-Benoit Charriere, to describe the circumference of medical tubing. The idea is that a non-circular tube will fit into the same incision or blood vessel as a round one. Therefore French size = 2*pi*r (where r is the radius in mm). Usually French size is considered to be 3 times the diameter in millimeters or 1Fr = 1/3mm.
What else can I help you with?
How should the diameter measurement called french be abbreviated?
FR or F is the common abbreviation for the diameter measurement French
What is the inside measurement of a circle called?
It is its square area which is found by pi*radius squared
What is the diameter of Cm?
A centimetre is a measurement unit. It can have no diameter.
Is diameter the measurement around?
no. its the inside Diameter is the measurement from one side of the circle, through the center, to the opposite side. Circumference is the measurement around the circle.
How do you find the diameter of a water balloon in qubic inches?
Diameter is a length measurement. Cubic inches is a volume measurement. Diameter cannot be measured in or converted to cubic inches.
How should the diameter measurement called french be abbreviated?
FR or F is the common abbreviation for the diameter measurement French
How many dia meter in 1 mm?
There is no such unit of measurement as a diameter - the diameter is the length across a certain object. There are units of measurement called a decimetre and a decametre.
Is there a country that is 50 square miles in diameter?
Square miles is a measurement of area. Diameter requires a distance measurement, not an area measurement.
What is the inside measurement of a circle called?
It is its square area which is found by pi*radius squared
How is a French Scale used on medical devices?
A French scale is used to measure the diameter of catheters and other medical instruments. It is based on a unit of measurement called a French (Fr) which is equal to 1/3 millimeter. By using a French scale, healthcare providers can select the appropriate size of catheter for a specific procedure or patient.
What the diameter of an inch?
An inch is a unit of measurement. It has no diameter.
What is the diameter of Cm?
A centimetre is a measurement unit. It can have no diameter.
Is diameter the measurement around?
no. its the inside Diameter is the measurement from one side of the circle, through the center, to the opposite side. Circumference is the measurement around the circle.
What is the inside diameter of a tube called?
The inside diameter of a tube is called the "inner diameter" (ID). It refers to the measurement of the tube's internal space, which is crucial for determining the flow capacity and fitting compatibility with other components. In contrast, the outer diameter (OD) measures the tube's external width.
How do you find the diameter of a water balloon in qubic inches?
Diameter is a length measurement. Cubic inches is a volume measurement. Diameter cannot be measured in or converted to cubic inches.
What The measurement of the inside of a circle?
The longest measurement inside a circle is its diameter.
What is the abbreviation for the French measurement?
The abbreviation for the french measurement is "verge".
