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2. Injector pen - Wikipedia

   en.wikipedia.org/wiki/Injector_pen

   Today, pen needles are manufactured at shorter needle lengths than required for typical vial and syringe administration, which decreases the pain associated with injection. [2] They are available in multiple lengths and gauge of needle , including 3.5mm, 4mm, 5mm, and 8mm lengths, and 31 through 34 gauge. [ 8 ]

3. Microneedles - Wikipedia

   en.wikipedia.org/wiki/Microneedles

   Dermarollers are hand-held rollers equipped with a total of 192 solid steel micro-sized needles arranged into 24 arrays, lengths ranging from 0.5-1.5mm. [ 31 ] [ 33 ] With the growing popularity of microneedling, MNs have also been commodified into home care Dermarollers, which are similar to medical dermarollers, except that the needles are ...

4. Syringe - Wikipedia

   en.wikipedia.org/wiki/Syringe

   Disposable syringe with needle, with parts labelled: plunger, barrel, needle adaptor, needle hub, needle bevel, needle shaft According to the World Health Organization, about 90% of the medical syringes are used to administer drugs, 5% for vaccinations and 5% for other uses such as blood transfusions. [1]

5. Hypodermic needle - Wikipedia

   en.wikipedia.org/wiki/Hypodermic_needle

   Syringe on left, hypodermic needle with attached colour coded Luer-Lock connector on right Hypodermic needle features. A hypodermic needle (from Greek ὑπο- (hypo-= under), and δέρμα (derma = skin)) is a very thin, hollow tube with one sharp tip. It is one of a category of medical tools which enter the skin, called sharps. [1]

6. Surgical suture - Wikipedia

   en.wikipedia.org/wiki/Surgical_suture

   1/4 circle; 3/8 circle; 1/2 circle. Subtypes of this needle shape include, from larger to smaller size, CT, CT-1, CT-2 and CT-3. [3] 5/8 circle; compound curve; half curved (also known as ski) half curved at both ends of a straight segment (also known as canoe)

7. 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]