The origin of the painless syringe

I believe we are very interested in the origin of painless syringes, and today we are talking about the origin of painless syringes:

  The painless syringe was born on Rice's "Engineering 120" new engineering design course, which was designed to test students' ability to solve practical problems. Dr. Mehdi Razadi is a cardiothoracic surgeon at the Texas Heart Institute, who injects the patient's face and groin every day, and the injection of these parts to the patient is an unusual pain, and he hopes that " 120 "to develop an anesthesia syringe, paralyze the skin before injection to relieve the pain caused by injection.

  The cylindrical anesthesia syringe, printed with 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 ice pack). The main working principle is that ammonium nitrate is dissolved in water heat. When the cylindrical anesthesia was twisted, the membrane between the isolation zones ruptured, and the ammonium nitrate reacted with water, causing the bottom metal plate to cool rapidly. The glass of the whole glass syringe was cooled to 4.5 degrees Celsius (about 40 degrees Fahrenheit) , So as to achieve the effect of paralysis of the skin.

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  Taizhou thousands of Johnson Plastic Co., Ltd. is a commitment to the medical aspects of research and development, production and sales as one of the modern enterprise! The company mainly engaged in: pet chip syringes, medical silicone O-ring, medical medical plastic products!