新型无针注射器问世打针不再疼

2012-06-03 00:00:00来源：21英语网

　　Emerging from MIT’s Mechanical Engineering department is a jet-powered shot, innovating and replacing the application of many needles. This technology could bring the sensation of receiving an injection down to the mere bother of a mosquito bite – possibly less. The team’s mechanism utilizes a ‘Lorentz-effect actuator,’ which is described as:

　　This could be great news to needle phobics. D. Keith Lamb, founder of needlephobia.info finds that about 10 percent of Americans have a phobia with needles, divided into a few different categories: Hyperalgesic, the fear of pain. Resistive, the combative anxiety against being controlled. Associative, suffering from emotional trauma and fear of the injection and Vaso-Vagal, or the largest group; those who fear the thought or sight of the needle itself (half of all phobics). “I believe I have tried everything available,” Lamb writes. “Most needle phobes are actually afraid of the needle itself, rather than the pain. For me, it was pain…pure and simple. I am convinced that the technology exists today to ‘solve’ this problem. The challenge is to find a legitimate way to access that technology. The ultimate challenge is to understand this fear well enough that it can be prevented.”

　　Perhaps these jet injections of the future will solve needle phobias, patient compliance and accidental sticking. However, all questions remain regarding disposability, sterilization procedures, cheap distribution and deployment, pharmaceutical developments (MIT’s YouTube title says this “may be the end of needles”; but I guess I’m a tad skeptic). Perhaps the beginning of the end? My mom is a nurse. Growing up, I was fortunate to get quite a few vaccines and shots in the comfort of home. Now needles don’t bug me. If these jets show up at the drugstore for cold and flu season in the next couple of years I’ll be impressed. But I’d be much more impressed if we could all get over our fear of needles.

　　北京时间5月30日消息，科学家研发出一种无需针头就能注射药物的新方法，可用一种高速高压喷射器将药物透过皮肤注入体内。这种方法有朝一日可能会终结今天打针会疼的时代。

　　科学家于5月26日揭开了这种无针注射器的神秘面纱。它和影片《星际迷航》中的注射装置很像，能按照事先制定的程序给不同深度的皮肤注射各种剂量的药物。对患有“针头恐惧症”的病人来说，由于这种创新性注射器不会让患者疼痛，将来可能大受欢迎。通常情况下，这类患者由于对针头有恐惧，甚至连疫苗都不打。

　　由伊恩-亨特率领的麻省理工学院研究小组开发了一种射流注射系统，通过一种严格控制的方式给不同深度的皮肤注射各种剂量的药物。这种设计是建立在一种名为“洛伦兹力致动器”的机械装置基础上的。这种装置很小，但功能强大，外面缠绕着金属线圈，和存放药物的安瓿瓶内的一个活塞相连。通电时，这种无针注射器内的电流与磁体的磁场相互作用，产生强大助推力，推动活塞前进，以高压高速(几乎接近空气中的声速)将药物通过安瓿瓶喷嘴喷射出来，而这个喷嘴就和蚊子的尖喙一样宽。

　　研究人员在试验中发现，不同的皮肤类型需要各种相应的压力，才能将足够剂量的药物喷射到所需深度。霍根表示：“给小孩子注射疫苗时，不需太大压力，但如果是我的皮肤，就不同了。我们可以根据需要，决定无针注射器所需的压力。这就是这种新型装置的魅力所在。”《医学工程学与物理学》杂志报道了这项新研究的重大成果。

本文关键字: 无针注射器