I have always been impressed with the invention of the infusion set, which contains the science of aerofluidics, linkers, and many other aspects that make the treatment of human diseases a step up. I studied the history of intravenous infusion well on the internet. The development of intravenous infusion technology has undergone nearly 500 years of twists and turns, and gradually formed a complete system in the 20th century, becoming one of the most common and most direct and effective clinical treatment means. william harvey in 1628 proposed the theory of blood circulation, laying the theoretical foundation for later people to carry out intravenous infusion therapy, is called the ancestor of modern intravenous infusion therapy. In 1656, the English physicians Christophe:wren and Robert, who injected drugs into the veins of dogs with feather tubes, pioneered intravenous infusion therapy, and in 1831, when cholera was ravaging Western Europe, the Scottish physician Thomas Latta injected boiled salt water into the veins of patients to replace the fluids lost due to cholera vomiting and diarrhea. (Hero!) Thus, Dr. ThomasLatta is rightly considered the first physician to successfully lay the groundwork for human intravenous fluid therapy. In 1907, the Czech John Jansky established the ABO blood grouping system, which made intravenous blood transfusion a safe means of emergency treatment. However, doctors were plagued by the problems of infection and pyogenic reactions to intravenous infusion therapy. Therefore, until 1930, intravenous infusions were used only for emergency patients, and nursing staff was limited to assisting in the preparation of supplies for intravenous infusions, while the actual performance of venipuncture was limited to the physician himself. In 1931, Dr. Baxbr, an American physician, worked with his companions to produce the world’s first commercial infusion, 5% glucose injection, in a renovated automobile garage, and this industrially produced infusion was used in large quantities in the Second World War for wounded and sick patients. This industrially produced infusion product was used extensively in the Second World War to rescue the wounded and sick. The second generation of intravenous infusion products is a semi-open infusion system, which consists of a glass or hard plastic container and a disposable infusion line with a filter membrane. The improved infusion lines reduce the chance of contamination, the production of solutions becomes centralized and industrialized, and the quality and safety are greatly improved. The third generation of intravenous infusion system, also known as fully closed intravenous infusion system, is to replace the infusion container with a soft bag made of plastic, and the soft bag will be gradually deflated by external atmospheric pressure during gravity drip, so it is not necessary to use the inlet needle to connect the gas inside and outside the bag, while the soft bag is formed once, and the inlet needle and dosing valve are double-layered structure, which avoids direct contact between the solution and the outside world or rubber, and thus has a very superior anti-pollution The effect is very superior to prevent pollution.