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    He is a super cute boy, and he doesn¡¯t look like a top student.

    Maybe it was because of this that Classmate Duan had to lower his head for a long time, as if half holding a pipa and half covering his face.

    Sometimes it¡¯s a ¡°sin¡± to look a bit special but not ugly.

    ¡°It doesn¡¯t matter, you say it first.¡± Dr. Cheng Yuchen encouraged the juniors in his school.

    What are you afraid of? Senior is here.

    After receiving this order, classmate Duan Sanbao tapped the pen in his hand on the notebook in his hand and whispered: "There are three doubts that need to be carefully identified. One is the heart-to-chest ratio. The heart-to-chest ratio of a normal person is one to two. This patient  The ratio of heart to chest is wrong, more than one to two."

    The top student spoke differently, his tone was low and steady, not as high-profile as the boy just now.  The content of the words is more solid and practical, and it is definitely not just a random guess about any age group.

    Um?  This person from the capital seems to be a bit of a scholar.  Zhao Zhaowei and the others thought.

    What is the ratio of heart to chest?  Just like the air band width of the pneumothorax line, accurate anatomical landmarks must be found on imaging before measurement.  Just a little bit of it would probably knock down a poor medical student.  There are so many books to read in medicine that it is difficult to remember them all at once.

    Students who remember the knowledge points look for the problems pointed out by classmate Duan on the film.

    "Look for the horizontal barrier first, right?" classmate Zhao Zhaowei asked in classmate Zhang Desheng's ear.

    "Go back and read the book." Zhang Desheng glared at him and went back.  For students who have not studied well, students who are top students also have no time to teach.  That¡¯s all the basics.

    "I'm not sure, so I'm asking you. It's not that I can't remember." Zhao Zhaowei complained.

    "Don't be so unsure, okay? This is someone else's territory." Zhang Desheng rolled his eyes at him.

    Those who have to flatter themselves in front of their opponents should not emphasize that they cannot remember well and say that they are not good at it.

    If you want to know the cardiothoracic ratio, you first need to know the transverse diameter of the heart and the inner diameter of the thorax. Divide the two to get the cardiothoracic ratio.

    As Mr. Zhao said, on the anteroposterior and lateral chest X-rays, first try to find the anatomical landmark on the right side of the diaphragm and draw a transverse line across it. The straight line distance is generally the maximum inner diameter of the thorax.  For the transverse diameter of the heart, look over it with the naked eye and look for the transverse distance with the largest shadow of the heart.

    The normal cardiothoracic ratio is 0.5, that is, the transverse diameter of the heart is half of the inner diameter of the thorax.  In pediatrics, it should be noted that in children under three years old, because the heart is held in an oblique transverse position by the septum, the ratio will be greater than this, which is approximately equal to 0.6.  Other times it is not a 0.5 ratio, and careful consideration needs to be given to excluding whether the patient has an unhealthy condition.  Generally speaking, the cardiothoracic ratio is larger than the normal ratio. According to the formula, it is likely that the molecule is too large, which means the heart is enlarged. This can be used to suspect that the patient has characteristics of heart disease.  If the molecules are too small and the thorax becomes smaller, you can refer to the ratio between the upper organs and the thorax in the photo to determine whether the thorax has become smaller. This possibility is lower than that of the heart.

    Does this patient have heart disease?  Everyone looked at the video, and it was certain that the evidence Duan found was far more reliable than the boy's previous suspicion of tuberculosis.

    I saw the people who listened to the classmates' words, the predecessors were quite agreed.  Dr. Cheng Yuchen nodded and said, "You can talk about it later."

    There are three suspicious points in Classmate Duan¡¯s statement, but I only mentioned the first point now.

    The others were waiting for Classmate Duan to say.

    Fat Mom Xiangshan reminds you: please save it after reading it (no mistake), it will be more convenient to read it again.  (Remember the website address: www.hlnovel.com
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