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2. French catheter scale - Wikipedia

   en.wikipedia.org/wiki/French_catheter_scale

   The French scale measures the outer diameter of the catheter, not the size of the internal drainage channel (inner diameter). For instance, a two-way catheter of 20 Fr and a three-way catheter of 20 Fr have the same outer diameter, but the three-way catheter has an additional channel for irrigation, reducing the size of its drainage channel.

3. Birmingham gauge - Wikipedia

   en.wikipedia.org/wiki/Birmingham_gauge

   The Birmingham gauge ranges from 5/0 or 00000, the lowest gauge number corresponding to the largest size of 0.500 inches (12.7 mm), to 36, the highest gauge number corresponding to the smallest size of 0.004 inches (0.10 mm). The increments between gauge sizes are not linear and vary. [2]

4. Hypodermic needle - Wikipedia

   en.wikipedia.org/wiki/Hypodermic_needle

   Various needle lengths are available for any given gauge. Needles in common medical use range from 7 gauge (the largest) to 34 (the smallest). 21-gauge needles are most commonly used for drawing blood for testing purposes, and 16- or 17-gauge needles are most commonly used for blood donation, as the larger luminal cross-sectional area results ...

5. Body jewelry sizes - Wikipedia

   en.wikipedia.org/wiki/Body_jewelry_sizes

   Generally, the system of gauge-and-inches is used: In gauge notation, jewelry less than 1 ⁄ 2 ″ thick is typically measured in a system originally devised for measuring wire thickness. A gauge number denotes a thickness on a standardized scale which, for most purposes, starts at 20g (0.812 mm thick— often used for the posts for nose studs ...

6. Needle gauge comparison chart - Wikipedia

   en.wikipedia.org/?title=Needle_gauge_comparison...

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7. Needle length for vaccines should vary based on weight. You ...

   www.aol.com/lifestyle/needle-length-vaccines...

   While the standard needle size for vaccination is 1 inch, it's recommended that women over 200 lbs. and men over 260 lbs. get shots with 1.5-inch needles. ... while the needle size used for all ...

8. Sewing machine needle - Wikipedia

   en.wikipedia.org/wiki/Sewing_machine_needle

   More than a dozen modern conventions exist for numbering the sizes of sewing machine needles, though only two remain in common use: the American (established and propagated by Singer) and the international system (also called the "European", "number metric" or "NM" system). The European designation, established in 1942, corresponds to the ...

9. Injector pen - Wikipedia

   en.wikipedia.org/wiki/Injector_pen

   They are available in multiple lengths and gauge of needle, including 3.5mm, 4mm, 5mm, and 8mm lengths, and 31 through 34 gauge. [8] Over time, needles have also had bevels designed which decrease the force required to penetrate the skin, which decreases the pain associated with injection and may increase the acceptability of self-injection. [ 8 ]