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The urethra is measured with a tool called a Urethra Gauge.

SI Unit of Measurement:

SI unit of Measurement is the most widely accepted means for measurement.

The inner circumference of the urethra can range is size from 2 millimeters to 50 millimeter's.

French Unit of Measurement:

A frequently used system of measurement has been the French Unit of measure which has been around since the 1400's. This unit of measure allows for a fast rough measurement, should not be used for precise measurement.

  • Nomenclature: 14 French Units = (14Fr)

Most of the Catheters stocked in hospitals are:

[6Fr, 8Fr, 10Fr, 12Fr, 14Fr, 16Fr, 18Fr, 20Fr, 22Fr, 24Fr, 26Fr, 28Fr, 30Fr, 32Fr, 34Fr, 36Fr, 38Fr, 40Fr, 42Fr].

Example:

A person that has a circumferential measurement of the urethra of 9Fr finds themselves in a predicament because most hospitals only stock their hospitals with even sizes, thus the size of catheter available is either an 8 Fr or a 10Fr. Herein lies a potential problem in the availability of necessary equipment for the health care provider.

Great website that discusses different catheter sizes and urethra size

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15y ago

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