Whether to perform thrombolysis or not, whether to perform thrombectomy or other measures, all need to wait for the angiography results before considering.

Pulmonary artery embolism generally occurs in the left and right pulmonary artery trunks and their lower branches. Distal stubborn pulmonary artery embolism is relatively rare. Since the thrombus in the terminal circulation of the pulmonary artery has a strong autolytic ability, the small terminal thrombus can be completely autolytic by the human blood vessels, and the doctor does not need to over-dissolve the thrombus. The doctor only needs to open the main artery.

With this idea as a guide, just like the injection of the contrast agent at the root of the main blood vessel during coronary angiography, the doctor wants the contrast agent to reach the pulmonary artery at the root of the left and right pulmonary aortas, usually at the inferior vena cava.

The inferior vena cava collects systemic venous blood and enters the right atrium. The venous blood in the right atrium is pumped into the right ventricle, and then the venous blood is output from the right ventricle to the pulmonary artery, from the pulmonary artery to the left and right pulmonary artery trunks to the lungs, for gas exchange, turning venous blood into arterial blood, and then the pulmonary vein returns to the left atrium and the left ventricle to be pumped out to the whole body. This circulation is called pulmonary circulation.

The blood flowing in the pulmonary artery is venous blood, not arterial blood. The blood flowing in the pulmonary vein is arterial blood. The blood flowing in the veins of the systemic circulation is venous blood, and the blood flowing in the arteries is arterial blood. This is the most common misunderstanding among laymen. Therefore, pulmonary artery thrombolysis dissolves venous blood clots, and penetrates the femoral vein instead of the femoral artery. This is different from coronary angiography.

This is enough to illustrate the complexity and diversity of interventional surgeries.

The doctors in the control room viewed the imaging results through lead glass together with the surgeons in the operating room, and witnessed the real-time progress of the operation.

After the angiography machine was turned on, a thin wire tube could be seen coming to the lower end of the lung. Similar to coronary angiography, the doctor had to find a way to prevent the catheter from slipping out and had to wrap it around like a small hook. Today was not a practice for young doctors, but the deputy senior doctor was in charge of the operation, which was obviously different. The speed was super fast, and there was no hesitation during the operation due to lack of experience in exploring the anatomical position of the human body.

Most people can't see the process clearly. Da da, the contrast agent has been injected into the blood vessels for visualization.

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The principle is exactly the same as other interventional surgeries. Where the blood vessels are blocked, the contrast agent cannot pass through, resulting in a lack of contrast, which is manifested as a blank, that is, not black but white. In the pulmonary artery, the thrombosis of the left and right pulmonary artery trunks blocks the pulmonary artery imaging. It is possible that the artery imaging of one side of the lung is completely dim. The visual effect on the display screen is very shocking, and it may be more shocking than coronary angiography.

This first requires that when the blood vessels are unobstructed and under normal development, the pulmonary vascular system is the same as the blood vessels distributed in other organs of the human body, just like the branches of a big tree, except that the size and number are different.

That being said, the difference in visual effects for doctors after contrast agent is injected is very obvious. On the display screen, you can see that the two large-caliber sewer pipe-like blood vessels on the left and right have black balls of wire like feather dusters coming out of them, which are the pulmonary artery system. The blood vessel distribution map produced by coronary angiography does not have such terrible density.

Normal angiography is like this. Once a blockage occurs, if it is a blockage of one side of the aorta, it is not surprising that it can be a magnificent sight that the feather duster on one side is completely dimmed. It is enough to make medical students feel educated. This may not be very similar to coronary angiography. The blood vessel loss shown by coronary angiography is like a blank line tube in the last surgery.