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Safety needles [1] serve the same functions as safety syringes, but the protective mechanism is a part of the needle rather than the syringe. Legislation requiring safety syringes or equivalents has been introduced in many nations since needlestick injuries and re-use prevention became the focus of governments and safety bodies.
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.
Researchers developed a new jet injection design by combining the drug reservoir, plunger and nozzle into a single-use disposable cartridge. The cartridge is placed onto the tip of the jet injector and, when activated, a rod pushes the plunger forward. This device is known as a disposable-cartridge jet injector (DCJI). [2]
Injector pens remove some of the complications of syringes by allowing the pen to be "pushed" against the skin at a 90-degree angle (removing the need to inject at a proper angle as is the case with syringes), as well as by replacing a long, thin plunger of a syringe with a simple button which is depressed and held to inject the dose. [2]
In syringes, plungers are constrained to linear motion as they are pulled and pushed within an outer tube or "barrel." The plunger allows the syringe to take in or expel fluid through an orifice at the open end of the barrel. In disposable syringes, the plunger is often made of plastic with a rubber tip that seals between itself and the barrel.
Development of the fully disposable hypodermic needle was spurred on in the 1950s for several reasons. The Korean War created blood shortages and in response disposable, sterile syringes were developed for collecting blood. The widespread immunization against polio during the period required the development of a fully disposable syringe system ...
The Tubex Syringe cartridge was developed c. 1943 during World War II by the Wyeth company. It is a drug pre-filled glass cartridge syringe with an attached sterile needle, which is inserted in a reusable stainless steel holder (now plastic). The product was manufactured for immediate injection once the pre-filled cartridge was attached to the ...
A study done in African countries, reports that 15% to 60% of clinics reuse immunisation needles and syringes without proper disinfecting, resulting in increasingly large cases of unsterilised injections. 55% of North-western China’s health care workers reported having used SUDs, resulting in an estimated 135 to 3120 per 100,000 population ...