The market is small and there is no data accumulation. What do manufacturers and clinicians use to research products. It's useless to compare with foreign countries. I don't know what to compare. Just blow holes.
From the very beginning, student Xie focused on the essence of this bragging, so don't be led by the nose easily. She came back from the future with relevant data, and the research report made after the number of domestic cases increased to a certain amount gave some real pointers to why domestic products are worse than foreign ones.
"The largest pore diameter in foreign countries can reach 80 microns, and the average is more than 50 microns. This is a small artificial blood vessel. You can also say that if you want to achieve 80 microns, you can do it, but if you want to achieve 80, you must do it. The small-sized artificial blood vessels are not available, but the large-sized artificial blood vessels are made, which depends on the size. After all, the production process is different. The stretching degree of domestic products is several times that of foreign ones.”
The expanded body is drawn and sintered.
The man from the factory stared at her face and couldn't let go: Are you a doctor? Are you sure it's just a doctor
Really just doctors. Xie Wanying carefully explained to the other party the key points of artificial blood vessels in the eyes of doctors: "The most challenging thing about artificial blood vessels is not the large-caliber tubes, but the small-caliber tubes that are small to a certain extent."
The most difficult problem with large-diameter pipes and small-diameter pipes is strength, which may not be enough. Larger diameter tubing may be able to be stacked up in thickness for added strength. Small bore tubing as small as it gets doesn't have this shortcut to pull strength. Looking at the whole world, it is full of difficult projects, and it is even more difficult for the domestic artificial blood vessel business that has just started.
When the teachers discussed it today, she immediately realized that they were talking about small-caliber tubes. Why, one, Mr. Fu didn't mention the recent surgical case of Axi's mother at all. The latest application cases that meet the requirements can be presented at the meeting by the way. Second, the problems with the anastomosis fit the problems revealed in the scientific research reports she had seen in the future.
"When our surgeons perform surgical sutures, the foothold of the needle and thread is about 2mm away from the nozzle. The fixation strength of the suture is determined by the crystallinity of the material, the width of the nodes in the material, and the length of the fiber, not by a single aperture. Relational. Have you done data on the crystallinity of domestic products compared with foreign ones? The longer the fiber length, the smaller the node width, and the smaller the strength will be. The nodes made by foreign products are uniform, and some have large apertures but short fibers. You do not know the domestic technology. I admitted that the larger the aperture, the longer the fiber should be stretched. In the operation, if the doctor happens to cut the worst node with a pair of scissors, the problem of relatively uniform nodes in foreign countries is small, and problems are prone to occur in China. You asked the doctor to wear an electron microscope to cut the artificial blood vessel, how is this possible?"
This classmate refuted the other party's point in a voice, but the other party was silent for a long time.
All the teachers sitting here can finally breathe a sigh of relief. Non-professionals don't understand materials science, so they can only listen to the people from the manufacturer. Now that the classmate said it, they have also found some direction, and the next step is to engage in related medical research.
Speaking of which, Xie Wanying didn't say these words just to show off, she must have hated iron for being weak in her heart. You must know that she can only advise friends to choose foreign products after checking the information more than ten years later. Some domestic manufacturers do not think about excellence in product spirit, because they are too expensive. However, medicine is very rigorous, and it is impossible to say that medical equipment can be worn casually like making a piece of clothing.