Halo? Try a painless syringe for 3D printing
Release date: 2015-04-28 No one likes to be pinned, but if you are sick, you have to take an injection. But some people are really afraid of injections, yes, they are the legendary patients with fainting. According to the Journal of Family Practice, at least one in five people in the United States have fainting, and most of them choose to evade vaccination, but the vaccine is a very important preventive measure, which will undoubtedly become public safety. Big hidden dangers. Studying at Computer Science at Rice University, 19-year-old Greg Allison and his friends Andy Zhang and Mike Hua developed the Comfortably Numb anesthesia syringe, which cools the injection site and makes the injection almost painless. This cylindrical anesthesia syringe, printed in 3D technology, is less than 2 inches long (5 cm) and contains two isolation zones, a small amount of water and ammonium nitrate (two components of the ice pack). Its main working principle is that ammonium nitrate is dissolved in water to absorb heat. When the cylindrical anesthesia device is twisted, the film between the isolation zones is broken, and ammonium nitrate reacts with water, causing the bottom metal plate to rapidly cool down, and the skin in contact with the metal plate is cooled to 4.5 degrees Celsius (about 40 degrees Fahrenheit) to reach The effect of paralyzing the skin. The syringe was born at Rice University's Engineering 120 New Engineering Design Course, which was designed to test students' ability to solve practical problems. Dr. Mehdi Razadi, a cardiothoracic surgeon at the Texas Heart Institute, injects daily into the patient's face and groin, and the injections from these sites give the patient exceptional pain, so he hopes to "engineer The 120" can develop an anesthesia syringe that paralyzes the skin prior to injection to reduce the pain associated with the injection. In order to test the effect of the Comfortably Numb anesthesia syringe, the R&D team used a pen instead of a needle to perform a simulated injection on six volunteers. Although no clinical trials were conducted, the R&D team expressed confidence in the device and would certainly reduce the pain of injection. In addition to the advantages of speed, efficiency, and one-off, the Comfortably Numb anesthesia syringe does not have to undergo a rigorous and complex audit of the regulatory body like a needle or other medical device because the chemicals in the anesthesia device do not touch the skin. The Comfortably Numb anesthesia syringe also received the University of Rice's Best Freshman Design Award, and the team is applying for a temporary design patent and is working to reduce the anesthesia device, hoping to launch it. Comfortably Numb anesthesia syringes will face two major problems when placed on the market: High injection cost: Estimated, the market price of anesthesia is about 2 US dollars (equivalent to 13 yuan), while the average price of needles and syringes is about 35 cents (equivalent to 2 yuan), the price difference is 6 times. But the team said that for doctors who do a lot of injection work, the price is still very valuable. The nature of the injection has not changed: The Comfortably Numb anesthesia syringe does not fundamentally address people's fear of needles, because people still have to be poked by needles. Whether the Comfortably Numb anesthesia syringe can really reduce the number of patients with fainting, rather than simply reducing the pain of injection, is not known at the moment, so let time test it. Source: Lei Feng Net Organic wheatgrass powder is a powder made from fresh wheatgrass. Like most plants, wheatgrass contains chlorophyll, amino acids, minerals, vitamins, and enzymes. Wheatgrass powder is one of the most nutritious green superfoods in nature. Wheatgrass is young and fresh wheat, it contains a series of important phytonutrients.
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