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2. French catheter scale - Wikipedia

   en.wikipedia.org/wiki/French_catheter_scale

   However, the term gauge, abbreviated G or ga, typically refers to the Birmingham gauge for hypodermic needles. [1] The French scale measures and is proportional to the outer diameter of a catheter, with 1 French (Fr) defined as 1 ⁄ 3 millimeter, making the relationship: 1 mm = 3 Fr.

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. Syringe - Wikipedia

   en.wikipedia.org/wiki/Syringe

   U-100 syringe sizes and markings. 1cc (1 mL) Syringe Holds maximum: 100 units [10] Numbered in: 10 unit increments [10] Smallest line measures 2 units: [11] BD [10] ReliOn [12] Monoject [13] (all but 31 gauge needle) Smallest line measures 1 unit: Easy Touch [14] Precision Sure Dose [13] 1/2cc (0.5 mL) Syringe Holds maximum: 50 units [15 ...

5. 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 ...

6. Subcutaneous administration - Wikipedia

   en.wikipedia.org/wiki/Subcutaneous_administration

   The gauge of the needle used can range from 25 gauge to 27 gauge, while the length can vary between 1 ⁄ 2-inch to 5 ⁄ 8-inch for injections using a syringe and needle. [ 3 ] : 722 For subcutaneous injections delivered using devices such as injector pens , the needle used may be as thin as 34 gauge (commonly 30–32 gauge), and as short as 3 ...

7. Low dead space syringe - Wikipedia

   en.wikipedia.org/wiki/Low_dead_space_syringe

   The insulin syringe was the first syringe that is considered low dead space. It was initially created with low dead space for accurate measuring and mixing of fast and slow acting insulin, which had the added benefit of wasting as little of the expensive drug as possible.