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   Ok, the next step is to feed the contrast catheter along the guide wire. Jin Tianyu, who let his junior sister and junior brother come slowly, was much quicker to get started. Some junior sisters and juniors made a promise to find the way for him. He had a general understanding of the patient\'s blood vessels, and he could speed up without wasting time.

  The catheter is sent to the position, and the end is connected to the syringe to withdraw and exhaust.

   Connect the three-way three-way head, and the exhaust is completely exhausted to prevent air from entering the coronary arteries and causing fatal air embolism.

   During the exhaust process, the triple tee head is connected to the baroreceptor, the contrast agent, and the flushed saline or heparin respectively. Among them, the baroreceptor is connected to the display instrument, and the operating doctor can observe the invasive pressure graph of the aorta from the screen.

  The normal pressure graph is a smooth wave with systolic pressure at the top and diastolic pressure at the bottom.

  It is very important to observe this during the entire coronary angiography. Once the graph changes into a V-shape, it shows that the catheter orifice is incarcerated in the coronary vessels, coronary spasm and blockage will occur, and emergency treatment is required.

  The doctor checked that the patient\'s intraoperative indicators were normal, and there was no risk of overflow.

   Ready to power on for perspective.

   Turn it on, the yellow light is on.

  The image of the catheter in the human coronary artery appeared on the screen of the angiography machine, and the doctor could see the dark outline of the patient\'s heart, like a paper cut. The projection can be a static picture, which can be connected to become a dynamic movie picture. The audience will feel a bit like watching a folk shadow play. The two-dimensional dynamic image of the heart can show the activity of the heart shrinking and expanding, as lively as a mischievous child. Plop plop, the patient\'s heart beats in a plane, driving the coronary arteries where the catheter is located to beat together. The injected contrast agent travels in the artery with the blood, and the doctor can clearly see the direction and diameter of the blood vessel with the help of the contrast agent. If the artery is narrowed, the blood cannot pass through the contrast medium, and the missing image in the section of the blood vessel will turn from black to white. This is coronary angiography.

   Under the fluoroscopy, the doctors repeatedly determined whether the guide wire was in place, and then the guide wire and the angiography catheter were to enter the patient\'s left and right coronary arteries in turn for angiographic examination. As I said before, the x-ray system is a two-dimensional image. To turn it into a three-dimensional image, multiple body positions of the patient\'s heart vessels must be obtained. All the information is input into the computer and the computer reconstructs the three-dimensional image. light.

   "You guys go out." Jin Tianyu ordered the junior sisters and juniors to leave, preventing them from eating radiation.

   Without causing any trouble to the senior brothers, Xie Wanying and Pan Shihua accepted the command and exited the imaging room.

  The nurse was waiting outside, helping them take off their surgical gowns and lead gowns.

  After taking off the lead coat, the clothes were covered with sweat. Xie Wanying and the others washed their hands, wiped their sweat, and hurriedly returned to the control room to see what happened next.

   The person who was on the phone with Fu Xinheng changed from Dr. Xu to Dr. Shen.

   "She helped, right?" Dr. Shen asked after hearing the progress of the matter, wondering if his "reckless" suggestion had successfully reversed the situation.

   Yu Xuexian wanted to tell this senior brother not to be shy.

   "It means that our Director Zhang has very poisonous eyes." Dr. Shen laughed loudly and was very happy with the result.

   Doctors are happiest as long as they see their patients being saved.

   Dr. Xu leaned in front of the mobile phone and asked, "What\'s the situation in the angiography now? Are there any lesions in the three branches?"

  Certainly not, there is no such sign in the previous ECG.

   (end of this chapter)