"Dr. Wu, your eyes are so bright." Cheng Yunhai''s pain seems to be much lighter. He holds his bag and tries to squeeze out a smile. "It''s really an artificial heart."


    "No wonder the technology of artificial heart is not mature now. It can only be said that it is a way to barely maintain vital signs." Wu Mian smiled and said, "with your economic conditions, heart transplantation doesn''t seem to be a problem. You can''t wait for a suitable donor in China to go to the United States or Brazil."


    "Dr. Wu." Cheng Yunhai smiled bitterly, "your curiosity is really strong, just like a scientist I know."


    "This is to inquire about the medical history, which involves the treatment after your recovery. You can''t be careless." Wu Mian ignored the faint irony in Cheng Yunhai''s words.


    "I asked my attending doctor, an expert in the cardiology department of the West dasainai medical center."


    "Who?"


    "Dr. Damon rich."


    "Oh."


    "Do you know?"


    "Guide him to do a complicated congenital heart disease operation." Wu Mian smiled, "you continue."


    Guidance, Tao Ruo listened clearly this time.


    If it was the first contact, Tao Ruo would think that Wu Mian bragged. But after so long contact, he knew Wu Mian''s ability, but he didn''t expect him to use the word guidance.


    "..." Cheng Yunhai glanced at Wu Mian and their eyes collided. Then Cheng Yunhai said, "Dr. Damon rich said that after changing the heart, some people''s character will change. There is no detailed theoretical basis in both medical and biological circles."


    "Damon is right," Wu Mian said, "but the symptoms are not certain. He said extreme cases."


    "I can''t accept this change," Cheng Yunhai said. "So I chose artificial heart."


    "Is your company doing similar research?" asked Wu Mian.


    "Yes." Cheng Yunhai didn''t avoid it and admitted it directly.


    "What was the previous diagnosis?"


    "Dilated cardiomyopathy is in the stage of end-stage heart failure."


    Wu Mian nodded.


    "Artificial heart?" Tao Ruo smiled bitterly when he saw that they didn''t speak and there was a short gap. "Sea of clouds, have you been hiding it from me?"


    "Lao Tao, you didn''t ask," Cheng Yunhai said with a smile.


    "It is recommended to finish the operation here, relieve the symptoms of leg ischemia, or do a heart transplant."


    "The research in the laboratory has made a breakthrough," Cheng Yunhai said. "I should be the first experimental body in 3-5 years."


    "...." Wu Mian was helpless. How could Cheng Yunhai be so paranoid? What day is today? I met so many paranoid patients.


    "In ancient Greek mythology, tanatos, the God of death, has an iron heart and a copper heart. Dr. Wu, don''t you think it''s cool to use an artificial heart?" Cheng Yunhai smiled.


    "Tanatos... It''s complicated to say. Iron man also uses an artificial heart. Do you want to be such a person?" asked Wu Mian.


    "Of course, if there is a chance, who doesn''t want to. But controllable nuclear fusion is always 50 years away from success. It''s hard to be an iron man." Cheng yunhaidao.


    Tao Ruo is curious, but it''s not good. He has to look at Cheng Yunhai''s "heart".


    Now everything seems to be in the world of science fiction, everything is so unreal.


    "Can I have a look at your artificial heart?" Tao Ruo said, but Wu Mian had no taboo. He asked.


    "No problem." Cheng Yunhai opened his special backpack with a red "heart".


    Obviously, the heart as like as two peas in the face, looks like the heart that people are looking for, but it is static, but not "thumping".


    "Your mind is very delicate, very gentle and green." Wu Mian said with a smile.


    "At least it makes me look like a person... I don''t mean that, but it still looks like myself."


    "Permanent? How long after surgery?"


    "Well, it''s permanent. It''s been 4 years since the operation."


    "It''s rare. I can only say you''re lucky." Wu Mian smiled. "I have great hope for the success of the operation."


    "The third generation of test products still doesn''t solve the problem of thrombosis, but it''s very good. The laboratory has four generations of products," Cheng yunhaidao said.


    "Teacher Wu, is it related to lower limb necrosis?" Tao Ruo couldn''t help asking.


    "HMM." Wu Mian nodded. "The heart is like a pump. It contracts and relaxes day and night to provide power for blood circulation. The purpose of artificial heart is to build an auxiliary channel for the heart and help realize blood circulation."


    "The blood pump is connected with the patient''s own heart by two artificial blood vessels. The blood flows into the blood pump through the blood vessel from the ventricle. The impeller in the blood pump rotates to generate centrifugal force to pump the blood out and flow into the ascending aorta through the outlet vessel, partially or completely replacing the function of the heart."


    "The blood pump is connected to the external controller through a pump cable. The patient needs to carry the controller with him."


    "The controller weighs about 3kg and contains a battery pack to provide power and a speed control system. The first and second generation artificial hearts are pulsatile pump and axial flow pump respectively. The first generation pulsatile artificial heart is also known as positive displacement pump, which is large and difficult to implant."


    "The volume of the second generation artificial heart has become smaller, but the impeller speed is high, which may damage the red blood cells and coagulation system and easily cause thrombosis."


    "The equipment of the third generation artificial heart is small in size, easy to implant, and almost produces no heat during operation. Due to the use of non-contact bearings, the core parts can rotate without any mechanical contact with the surrounding components, reducing the loss caused by mechanical friction. Also, because the core parts are not in direct contact with blood, the thrombosis problem has been significantly improved."


    "But looking at Mr. Cheng''s situation, although it has improved, the thrombosis problem is still a headache," Wu Mian said.


    "Dr. Wu, you''re right." Cheng Yunhai said, "but there are laboratory samples of the fourth generation products. If the operation is successful here, I''ll replace the artificial heart as soon as possible."


    "Sigma lab?" asked Wu Mian.


    "Do you know?" Cheng Yunhai was slightly surprised. How could the young man know everything.


    "Yes." Wu Mian said, "this is not a military product. I can look at it from a distance and see some corresponding data. The fourth generation products are good, but slightly expensive."


    Cheng Yunhai frowned, sweat seeping from his forehead.


    "Do you usually take oral medicine or intramuscular injection?"


    "Oral, my heart has never given up." Cheng Yunhai said, "I also want to become a normal person one day, not by injection."


    "Your choice is right," Wu Mian said, "but oral drugs can also be addictive."


    "Well, so I control the drug dose," Cheng Yunhai said, closing his eyes, "but I''m so tired."