Polyester was the first material used in the manufacture of artificial blood vessels. Medical polyester, like medical sutures, has been tested for its long-term safety in the human body. Its biggest problem is that it has poor anticoagulant properties and requires anticoagulant pretreatment and biological coating.
eptfe is the expansion body of ptfe, commonly known as the king of plastics. It is equivalent to a new product made with special technology based on ptfe. In comparison, eptfe performs very well in terms of anticoagulant properties, has good biocompatibility in the human body, and has a very light rejection reaction. In addition, it is not easy to degrade like polyester, and can be used for a long time in the human body without frequent replacement. . Compared with polyester, it does not require anticoagulation pretreatment and does not require biological coating. These conveniences make it widely praised in clinical practice.
Does the star material of the new generation of artificial blood vessels really have no shortcomings at all? Nothing in the world is safe and perfect. It is impossible for medical devices to be used to grow tissues and organs of the human body.
The shortcomings of eptfe have been summarized in international research papers. They are always inferior to the elasticity of the human body's own blood vessels. The softness is somewhat lower than that of the human body, causing blood to flow in it for a long time, and it is easier to form at the anastomosis over time. Blood clots cause blockages.
Such equipment and materials are a great test of the surgeon's technical level.
If a surgeon is skilled, he may be able to help the patient handle the artificial blood vessel anastomosis better. The chance of blockage is low, even if it does happen, it will delay the time. If the surgeon's skills are mediocre, the consequences will go without saying.
Can all surgeons be required to be highly skilled?
impossible. The supply and demand for particularly good surgeons has always been out of balance.
Just like inventing a smartphone, it must have a fool-proof operation method that most people can use immediately. If it is made into complicated operations that only coders can use, it will become something that is not for the public. It cannot be sold even if it is sold.
In the medical materials market, it becomes: the medical surgical materials created must meet the technical level of most surgeons, not the technical level of experts.
If we simply use the technical level of experts to make medical equipment, it is destined to fail to be promoted, and it will not even be able to pass clinical trials, because the results of clinical trials will be so bad that they will be a mess. For example, one of the clinical trial indicators of this artificial blood vessel is called long-term vascular patency rate. The surgery performed by Daniel may be able to make this material perform extremely well in this indicator, reaching 80 or 90% in half a year. Surgeons with average technical skills can only achieve 40 to 50% failure.
The test results must be based on surgeons with average technical skills. Seeing this clinical trial value, all clinicians and researchers will become confused.
To sum up, eptfe has its shortcomings, but it has been recognized internationally in the production of artificial blood vessels. Again, the bad ratio should be controlled within a controllable range and should not exceed it.
Then it becomes a matter of choosing one of the two. Or is this material not good? Or is there an indescribable contradiction between this surgical technology and the new product?
The teachers at the conference table looked solemn and asked each other. First determine whether these problematic cases are widespread in various hospitals.
7017k
