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Guage vs French

Discussion in 'Anesthesiology' started by Bougie, Nov 7, 2006.

  1. Bougie

    Bougie Junior Member
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    This has always confused me. I realize that a higher gauge equals a smaller diameter and the higher French equals a larger diameter. Anyone have a conversion chart between the two? What is the gauge/French of the Cordis introducer and the MAC? Can't seem to get a straight answer anywhere. Thanks.
     
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  3. militarymd

    militarymd SDN Angel
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    Gauge refers to diameter ....18 gauge 1/18th of an inch.

    French refers to circumference....8 French...8 mm circumference


    My units maybe incorrect, but that is the difference between gauge and french.
     
  4. proman

    proman Member
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  5. dhb

    dhb Member
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    Isn't it the amount of needles that fit in a 1cm diameter circle (meaning you can fit 18 18g needles in a circle of 1 cm in diameter?)
     
  6. cchoukal

    cchoukal Senior Member
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    Do these refer to internal or external diameters/circumferences?
     
  7. militarymd

    militarymd SDN Angel
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    I don't know....I just know the concept.
     
  8. Worldtraveler

    Worldtraveler Junior Member
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    The French catheter scale is commonly used to measure the outside circumference of cylindrical medical instruments including catheters. On the French system, the diameter of the catheter can be determined by dividing the French size by pi, thus an increasing French size corresponds with a larger diameter catheter.( from wikipedia)
     

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