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  2. Birmingham gauge - Wikipedia

    en.wikipedia.org/wiki/Birmingham_gauge

    Size steps between gauges range from 0.001 inches (0.025 mm) between high gauge numbers to 0.046 inches (1.2 mm) between the two lowest gauge numbers and do not correspond to a particular mathematical pattern, although for the most part the steps get smaller with increasing gauge number. [3]

  3. French catheter scale - Wikipedia

    en.wikipedia.org/wiki/French_catheter_scale

    An increasing French size corresponds to a larger external diameter. This is contrary to Birmingham gauge, where an increasing gauge corresponds to a smaller diameter needle. The French size is a measure of the outer diameter of a catheter (not internal drainage channel, or inner diameter). So, for example, if a two-way catheter of 20 Fr is ...

  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. 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]

  6. Cannula - Wikipedia

    en.wikipedia.org/wiki/Cannula

    Cannulas are used in body piercing when using a standard IV needle (usually between 18GA and 12GA, although may be as large as 0GA, in which case the procedure is known as dermal punching and uses a biopsy punch without a cannula), and for inserting hooks for suspensions. During piercing, the fistula is created by inserting the needle. The ...

  7. Intradermal injection - Wikipedia

    en.wikipedia.org/wiki/Intradermal_injection

    Injections sites are often chosen for skin thickness, preferring thicker skin. ... and 26 or 27 gauge thick hypodermic needle is used. [1] ... at 21:56 (UTC). Text is ...

  8. Central venous catheter - Wikipedia

    en.wikipedia.org/wiki/Central_venous_catheter

    Once implanted, the port is accessed via a "gripper" non-coring Huber-tipped needle (PowerLoc is one brand, common sizes are 0.75 and 1 inch (19 and 25 mm) length; 19 and 20 gauge. The needle assembly includes a short length of tubing and cannula) inserted directly through the skin. The clinician and patient may elect to apply a topical ...

  9. Gauge (knitting) - Wikipedia

    en.wikipedia.org/wiki/Gauge_(knitting)

    The machine's gauge is expressed by the number of needles needed to achieve that gauge. B – Used for hand, mechanical, or modern Electronic Flat Machines (Stoll, Shima, Protti, etc.), where gauge is measured in 1-inch (2.5 cm) increments. The machine's gauge is again measured by the number of needles required to achieve that number.

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