The market size is small, and there is no data accumulation. How can manufacturers and clinicians use it to study products? It is useless to compare with foreign countries. I don’t know what to compare. I only know how to blow holes.
Student Xie has been focusing on the essence of this boast from the beginning, and should not be led by others easily. She has relevant data back from the future, and the research report she produced after the number of domestic cases increased to a certain amount gives some substance.
Point to why domestic products are inferior to foreign products.
"The maximum pore diameter abroad can be 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 microns, you need to do it.
Those who don’t have small-sized artificial blood vessels like theirs have to make large-sized artificial blood vessels because they are large. To put it bluntly, 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 man from the manufacturer 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 tubes that are small enough to a certain extent."
The difficult problem for large-diameter pipes and small-diameter pipes is strength, fearing that the strength is not enough. Large-diameter pipes may be able to increase their strength by adding thickness. Small-diameter pipes that are very small do not have such a shortcut to increase strength. Looking around the world
They are all difficult projects, which are even more difficult for the domestic artificial blood vessel industry that has just started.
When the teachers discussed today, she immediately realized that they were talking about small-diameter tubes. Why, first, Teacher Fu did not mention the recent surgical cases of Axi’s mother at all. The latest application cases met the requirements and could be brought out at the meeting.
Second, the problems with the anastomosis were in line with the problems revealed in the scientific research reports she had seen in the future.
"When our surgeons perform surgical suturing, the needle thread ends in an area about 2mm away from the mouth of the tube. What determines the fixation strength of the suture is the crystallinity of the material, the node width and fiber length in the material, etc., not a single hole diameter.
It's related. Have you done any 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. Foreign products have uniform nodes, and some have large pores but short fibers. Do you know the domestic process yourself?
What he said is that he admitted that in order to make the hole larger, the fiber must be stretched as long as possible. During the operation, if the doctor happens to cut the worst node with scissors, the problem of relatively uniform nodes in foreign countries is small, but problems are prone to occur in China.
You ask a doctor to use an electron microscope to cut artificial blood vessels, how is this possible?"
This classmate retorted loudly to the other party's point, but the other party was silent for a long time.
All the teachers sitting here can finally breathe a sigh of relief. They are non-professionals who don’t understand materials science, so they can only listen to what the manufacturers say. Now that this classmate has talked about it, they have also figured out some directions, and they can do related work in the next step.
Medical research.
To be honest, Xie Wanying said these words not just for show, but in her heart she hated the fact that iron cannot become steel. You must know that after more than ten years, when she checked the information, she could only recommend that her friends choose foreign products. The spirit of some domestic manufacturers in making products is muddled.
I would like to strive for excellence, but it costs too much money. However, medicine is very rigorous, and medical equipment cannot be said to be like making a piece of clothing that can be worn casually.