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The French scale, also known as the French gauge or Charrière system, is a widely used measurement system for the size of catheters. It is commonly abbreviated as Fr but may also be abbreviated as Fg , FR or F , and less frequently as CH or Ch (referencing its inventor, Charrière ).
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Contrary to the French scale, the larger the gauge number, the smaller the catheter diameter. Although these catheters possess one 16 gauge port, the flow is considerably slower than one would expect through a 16 gauge peripheral IV due to the longer length of the central venous catheter (see section on "catheter flow" above).
To determine the depth of anesthesia, the anesthetist relies on a series of physical signs of the patient. In 1847, John Snow (1813–1858) [ 1 ] and Francis Plomley [ 2 ] attempted to describe various stages of general anesthesia, but Guedel in 1937 described a detailed system which was generally accepted.
There are many different surgical specialties, some of which require specific kinds of surgical instruments to perform. General surgery is a specialty focused on the abdomen; the thyroid gland; diseases involving skin, breasts, and various soft tissues; trauma; peripheral vascular disease; hernias; and endoscopic procedures.
These units are also used for measuring the depth of a surface supplied diver using a pneumofathometer and directly relate the pressure to an equivalent depth. The pressure gauges used on diving chambers are often calibrated in both of these units. Elapsed time of treatment is usually recorded in minutes, or hours and minutes, and may be ...
The template formats a track gauge size into standard notation and adds the conversion into the imperial/metric (other) size Template parameters [Edit template data] Parameter Description Type Status Track gauge definition 1 Defined track gauge, in mm or ft in. Also can accept: ' '', m, gauge name String required Link top measurement units lk =on: adds link to the gauge defining article String ...
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