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Hypodermic needles are normally made from a stainless-steel or Niobium tube [17] through a process known as tube drawing where the tube is drawn through progressively smaller dies to make the needle. The end of the needle is bevelled to create a sharp pointed tip, letting the needle easily penetrate the skin. [18] A hypodermic needle tip under ...
Hypodermic needles are available in a wide variety of outer diameters described by gauge numbers. Smaller gauge numbers indicate larger outer diameters. [5] Inner diameter depends on both gauge and wall thickness. The following chart shows nominal inner diameter and wall thickness for regular-wall needles.
The first hypodermic needle was first used by Dr. Alexander Wood and immediately efforts were made to improve the design. It was not until 1954, with the need for massive syringe distribution of Dr. Salk's polio vaccine, that the first disposable syringes were created. Initially, they were made of glass.
The invention of MNs have retained the benefits of both hypodermic needles and transdermal patches while minimizing their cons. [12] [26] Compared to hypodermic needles, MNs provide a pain-free administration. [11] [12] MNs are able to penetrate through the epidermis, but not any deeper to compress on nerve-ends to produce pain responses.
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 ...
It consists, from front to rear, of a hypodermic needle, two bilateral flexible "wings", flexible small-bore transparent tubing (often 20–35 cm long), and lastly a connector (often female Luer). This connector attaches to another device: e.g. syringe , vacuum tube holder/hub, or extension tubing from an infusion pump or gravity-fed infusion ...