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    On the X-ray film, the lung field on one side is divided into three zones from the periphery to the hilum: outer, middle and inner.

    Under normal circumstances, there are lung markings in the lungs. They account for up to 90% of the lung area. It can be said that they basically represent the lungs.  Lung texture is the projection of the blood vessels, lymphatic vessels, bronchi, etc. of the lungs under an X-ray machine.  We know from anatomy that these structures of the lungs are like the branches of a big tree, with lines that branch and intersect.  The scene presented on imaging is also like this, like the texture on the surface of an object, so it is called lung texture.

    Once a pneumothorax occurs and the lungs are compressed, the inner and middle lungs will inevitably move downward and inward, which will show the result of visible lung texture being compressed on imaging.

    Where there are no lung textures, the area on the X-ray will become translucent, forming a dividing line with the lung texture area, which is the pneumothorax line.  This is the principle behind the pneumothorax line.  Anatomically, this line is also the pleural line.

    Spontaneous pneumothorax is a common clinical case.  Like when classmate Xie Wanying encountered an emergency patient in a car accident, she had no choice but to stay in the hospital.  As usual, it is necessary to take a radiograph after initially suspecting pneumothorax and then deal with it.

    It means that taking and viewing films is of great significance in diagnosing pneumothorax. I will explain how it works below.

    Finding pneumothorax lines on X-rays is common medical knowledge in this disease.  As long as medical students encounter this disease in clinical practice, they must learn it.

    The greatest significance of the pneumothorax line is that the width of the air zone can be measured based on the position of the pneumothorax line.  Air zone width is another proper term. As the name suggests, it is the width of the lung-free area (gas-liquid area) outside the pneumothorax line (displaced pleural line shadow).

    Measuring this width can further estimate the proportion of the patient's affected lung that has collapsed.

    Here is a rough comparison table: When the air band width is one-quarter of the patient's chest, the lungs are compressed to approximately 35 percent.  At a band width one-third of the patient's chest, the lungs are compressed to 50 percent.  When the width of the air band is one-half the patient's chest, the lungs are compressed sixty-five percent.  If the width of the air band reaches two-thirds of the patient's chest, a super warning occurs: the patient's affected lung is compressed to 90%.

    Wei Shangquan stumbled and continued: "Now visual inspection shows that the patient's left pleural line is displaced, and the width of the air band is estimated to be less than one-third of the thorax, so the patient's left lung has collapsed by about 40%."

    What is the significance of calculating the compressed volume of this lung?

    The inspection reports are used as a basis for further guidance in formulating clinical treatment strategies.  The results of the lung compression ratio are released to achieve this purpose and serve as medical evidence for treating the patient.

    Doctors cannot treat patients without evidence.  Which method to use, how to treat it, and to what extent it should be treated all depends on the evidence.  This is what Xie Xie said to Hu Hao before.

    The disease of spontaneous pneumothorax is a bit special.  For patients with primary spontaneous pneumothorax, these patients have no other diseases and the affected age group is basically young adults.  These two characteristics indicate that the cause of the patient's disease may be accidental. A young body with a strong metabolism can repair itself more easily than an older patient. These factors determine that this may be a disease that can attack and heal on its own.  (Remember the website address: www.hlnovel.com
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