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A jet injector is a type of medical injecting syringe that uses a high-pressure narrow jet of the injection liquid instead of a hypodermic needle to penetrate the epidermis. It is powered by compressed air or gas, either by a pressure hose from a large cylinder, or from a built-in gas cartridge, small cylinder, or spring (as in the Medijector Vision, Vitajet, Injex 23 and 30, or Insujet). Jet injectors are used for mass vaccination, and as an alternative to needle syringes for diabetics to inject insulin. As well as health uses, similar devices are used in other industries to inject grease or other fluid. The term "hypospray" is largely restricted to science-fiction, but there are cases in scientific periodicals of a real jet injector being called a hypospray. ==Types== The Jet Injector Gun and the Ped-O-Jet are air-powered medical injector devices designed to administer vaccinations very efficiently. Invented by Aaron Ismach, these medical devices were bought in mass quantities by the US government and provided to governments around the world to eradicate smallpox and other diseases. Servicemen in the Armed Forces were routinely injected with these medical devices to immunize them, and civilian usage included vaccinations during situations such as flu epidemics. The Jet Injector is powered by electricity, while the Ped-O-Jet version is powered by a foot pump and does not require electricity to administer the vaccines. These devices have various specialized nozzles for different medication densities, and can also be used to inoculate animals. The Biojector 2000 is a make of gas-cartridge-powered jet injector. It is claimed by its manufacturer that it can deliver intramuscular injections and subcutaneous injections up to 1 milliliter. The part which touches the patient's skin is single-use and can be replaced easily. It can be powered from a big compressed gas cylinder instead of gas cartridges. It is made by Bioject.〔http://www.bioject.com/〕 The PharmaJet Needle-Free Injector delivers vaccines either intramuscularly or subcutaneously by means of a narrow, precise fluid stream syringe that delivers the medicine or vaccine through the skin in one-tenth of a second. Diabetics have been using jet injectors in the United States for at least 20 years. These devices have all been spring loaded. At their peak, jet injectors accounted for only 7% of the injector market. Currently, the only model available in the United States is the Injex 23. In the United Kingdom, the Insujet has recently entered the market. As of June 2015, the Insujet is available in the U.K. and a few select countries. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Jet injector」の詳細全文を読む スポンサード リンク
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