Cousin, what are you talking about! Mi Wenlin wanted to cry.
After a while, I saw that the expressions of the seniors were acceptable, and they didn't intend to laugh at Mi Siran.
"I have a little idea." Dr. Yao, a senior doctor of engineering, commented on the answer to "Engine", "This answer can be regarded as a marginal ball."
So what is it?
Is push type.
Mi Siran regretted: Almost.
Xie Wanying smiled and took the exam for the junior sister who could answer: "What is the biggest problem of the push-style, do you know?"
"Is it not suitable if the blood vessel is too small?" Mi Siran said.
This junior sister has a good brain. Lin Hao and Pan Shihua nodded.
Pushing type is to put one blood vessel into another blood vessel for anastomosis, which requires a propeller as the axis to drive the blood vessel into the sleeve. If the diameter of the blood vessel is really too small, the pusher and other supporting devices are difficult to make, and the tools that are too thin are also difficult for doctors to operate. It is better to sew them by hand.
The diameter of the main blood vessel that the stapler can deal with is four to five millimeters, and if it is thinner, it will not be used at all if it is a blood vessel as thin as a few tenths of a millimeter. This is the case with the so-called most advanced s stapler, let alone other staplers. Therefore, the S-stapler is usually used at the proximal end of the coronary artery, near the aortic root, where the blood vessels are the thickest.
The difficulty lies in the anastomosis of the distal vessels. In patients with single-vessel disease, the distal blood vessels are usually thicker near the aorta, and can be anastomosed with an S-stapler. The situation of patients with multi-vessel disease is complicated, and some blood vessels may exceed the lower limit of the diameter that the s-stapler can handle, and the operating angle during laparoscopic surgery is tricky, making it impossible for doctors to use it.
The current situation of this patient is exactly the case. CT angiography shows that the diameter of blood vessels in the heart of this patient is not optimistic.
Is there a stapler that can be used for even the smallest blood vessels? Some, in the future, the non-push type will be used, and the idea will be developed into a traditional manual suturing method similar to that of a surgeon. Put the ends of the two blood vessels into the two ends of the stapler and release multiple curved needles with thread. When the stapler is withdrawn, multiple sutures pass through the ends of the two blood vessels at the same time. At this time, the doctor tightens the sutures to align the blood vessel surfaces. Tie the surgical knot again.
For the time being, I haven't seen any pictures of this stapler in Dr. Yao's computer database. Xie Wanying boldly took the risk of exposing her rebirth to show Dr. Yao. I don't know if there are any relevant research institutions that are secretly studying it. This question needs to be asked to the big engineering doctor.
Zuo Jinmao poked his head and saw what she drew and said, "Hey, didn't he play with it?"
Does Dr. Yao have it? Could it be that this device was developed by Dr. Yao?
"Take it out and show it to her." Zuo Jinmao urged his companion.
Yao Zhiyuan went to get his schoolbag.
It is no surprise that the schoolbag of the doctor of engineering has received everyone's onlookers again. Seeing that the engineering boy's schoolbag is full of hard science fiction, the tool box occupies a large space, and stylish plaid shirts and game cards are indispensable for geniuses who love to play. There are no books, and geniuses don't like endorsements.
Yao Zhiyuan lowered his head and rummaged through his schoolbag. There were too many small things, and it took a little effort.
Others continued the discussion: If there is no suitable stapler, can doctors use surgical robots to sew by hand?
It stands to reason that if things get to that point, the doctor will definitely try his best to complete all kinds of attempts before switching to thoracotomy.
Therefore, in the state where the stapler is not working, in order to ensure the success rate of manual suturing, the doctor needs to help the patient plan a feasible coronary artery path map.