Design on Magnetic Damping Pneumatic Needle Free Syringe with Separate Cylinder and Valve

Abstract:

Traditional syringe is using the stainless steel needles to inject the human body, this injection will not only cause pain, but will also cause bleeding in the skin, there is a potential risk of infection, in order to avoid the use of safe risk, needle free injection technology has been the international research hotspot in this field. The important technology of needle free injection is how to achieve drugs jet importing, which need strong drive-force and fast response power systems, so that pulse force will improve the piston of closed drug container to produce transient high pressure to force drugs extruded from micro hole, to form a high-speed jet micro fluidizer, that will penetrate rapidly the skin of the human or animal body to reach the drug absorption best parts. The existing power system is can be roughly divided into three types technically: compressed gas, fuel and hard spring. Traditional compressed gas law need to be equipped with a high-pressure gas storage and air compression device, which is bulky, expensive, energy-intensive and time-consuming, so it is very inconvenient to use. Similar with rocket technology, detonation fuel can provide enough thrust powerful to generate shock waves, but potentially dangerous and unstable factors are indeed worrying. Hard spring as power system is simpler than the above two kind of method, but it is a little difficult to operate. As a solution, adding the effect of permanent magnetic damping, a pneumatic needle free syringe successfully designed with high efficiency, low labor intensity, easy to operate, a slight noise, and adjustable injection force, which is facilitate to the use of clinical staff, and has a very good market prospects.

• Periodical: Advanced Materials Research (Volume 749)
• Pages: 550-553
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.749.550
• Online since: August 2013
• Authors: Ming Di Wang, Kang Min Zhong, Wan Ping Sun
• Keywords: Magnetic Damping, Needle Free Syringe, Punch Pneumatic Cylinder, Separate Cylinder, Separate Valve

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