The market is small, and there is no data accumulation. What can manufacturers and clinicians use to study products? It is useless to compare with foreign countries. I don’t know what to compare with. I only know how to blow holes.
Xie has been targeting the essence of this hype from the beginning. Don't be easily led by others. She has relevant data from the future. After the number of domestic cases increases to a certain amount, the research report produced gives some substantial points to why domestic products are worse than foreign ones.
"The maximum pore size abroad can reach 80 microns, and the average is more than 50 microns. This is a small artificial blood vessel. You can also say that you can reach 80, but if you want to reach 80, you can't make their small artificial blood vessels. They make large artificial blood vessels, which rely on size. In the final analysis, it is because the manufacturing process is different. The stretchability of domestic products is several times that of foreign products."
The expanded body is drawn and sintered.
The factory staff stared at her face and asked: Are you a doctor? Are you sure you are just a doctor?
It's really just a doctor. Xie Wanying explained to the other party in detail the key points of artificial blood vessels in the eyes of doctors: "The most challenging thing about artificial blood vessels is not the large diameter, but the small diameter tube that is small to a certain extent."
The difficulty of large-diameter and small-diameter tubes is strength. They may not be strong enough. Large-diameter tubes may be strengthened by stacking thickness. There is no such shortcut to increase the strength of small-diameter tubes. Looking around the world, all projects are difficult, and it is even more difficult for the artificial blood vessel business that has just started in China.
As soon as the teachers discussed today, she immediately realized that they were talking about small-caliber tubes. Why? First, Teacher Fu did not mention the recent surgical case of Yaxi's mother at all. The latest application case meets the requirements and can be brought out and discussed at the meeting. Second, the problems with the anastomosis are consistent with the problems revealed in the scientific research reports she has seen in the future.
"When our surgeons suture during surgery, the needle and thread land in an area about 2mm away from the tube mouth. The material crystallinity, node width and fiber length in the material determine the strength of the suture line, not the single aperture relationship. Have you done data on the crystallinity of domestic products compared with foreign products? The longer the fiber length, the smaller the node width, and the smaller the strength. The nodes of foreign products are uniform, and some have large apertures but short fibers. You admit the domestic process yourself, and to achieve a large aperture, the fiber must be pulled longer. During the operation, if the doctor happens to cut the worst node with a pair of scissors, the problem of relatively uniform nodes abroad is less, while problems are more likely to occur in China. You ask doctors to wear electron microscopes to cut artificial blood vessels. How is this possible?"
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This classmate refuted the other party's points again and again, and the other party remained silent for a long time.
The teachers present could finally breathe a sigh of relief. As non-professionals, they did not understand materials science and could only listen to what the manufacturers said. Now that this student had spoken, they also had some ideas and could do related medical research next.
Xie Wanying said these words not just for show, but because she was disappointed with her friend. You know, she could only advise her friends to choose foreign products when she looked up information more than ten years later. Some domestic manufacturers only care about getting by and don't think about excellence because it costs too much money. Medicine is very rigorous, and medical devices cannot be made like clothes that can be worn casually.
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