He is a super cute boy, and doesn’t look like a nerd.
Perhaps because of this, Duan had to keep her head down for a long time, as if she was half hugging a pipa and half covering her face.
Sometimes, not being ugly but just being a little bit special is also a "sin".
"It's okay, you speak first." Dr. Cheng Yuchen encouraged his juniors in the school.
What are you afraid of? I'm here, senior.
Upon receiving this order, Duan Sanbao tapped the pen in his hand on the notebook and whispered, "There are three suspicious points that need to be carefully identified. One is the heart-chest ratio. The heart-chest ratio of a normal person is one to two. This patient's heart-chest ratio is wrong, exceeding one to two."
The nerd spoke differently, with a low and steady tone, not as high-pitched and flamboyant as the boy just now. Every word he said was solid and practical, definitely not just a random guess based on age.
Hmm? This guy from the capital city seems to have some academic aura, Zhao Zhaowei and the others thought.
What is the cardiothoracic ratio? Just like the width of the pneumothorax line, it is necessary to find the accurate anatomical landmarks in imaging before measuring. Just one point is enough to stump a relatively poor medical student. There are so many books to read in medicine that it is difficult to remember them all at once.
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Students who remember the knowledge points look for the problems pointed out by Duan in the film.
"Should we look for the septum first?" Zhao Zhaowei asked Zhang Desheng in his ear.
"Go back and read the book." Zhang Desheng glared at him. For students who didn't study well, the top students also didn't have time to teach them. These are all basic knowledge.
"I'm not sure so I'm asking you, not that I can't remember." Zhao Zhaowei complained.
"Please don't be so unconfident. This is someone else's territory." Zhang Desheng blinked at him.
You have to put on a brave face in front of your opponent, and you can't emphasize that you don't remember it well or say that you are not good enough.
To know the heart-to-chest ratio, you first need to know the transverse diameter of the heart and the inner diameter of the thorax. Dividing the two will give you the heart-to-chest ratio.
As Zhao said, on the anteroposterior and lateral chest radiographs, first try to find the anatomical landmark of the right top of the diaphragm and draw a horizontal line there. The straight-line distance is generally the maximum inner diameter of the thorax. For the horizontal diameter of the heart, look with the naked eye and find the horizontal diameter where the heart shadow is the largest.
The normal heart-to-chest ratio is 0.5, that is, the transverse diameter of the heart is half the inner diameter of the thorax. In pediatrics, note that children under three years old have a greater ratio than this, approximately equal to 0.6, because their hearts are tilted against the diaphragm. At other times, if the ratio is not 0.5, it is necessary to seriously consider excluding whether the patient has an unhealthy condition. Generally speaking, if the heart-to-chest ratio is greater than the normal ratio, according to the formula, it is likely that the numerator is larger, which means that the heart is enlarged, and the patient may be suspected of having characteristics of heart disease. If the numerator is smaller and the thorax is smaller, the ratio between the organs on the chest and the thorax can be used to determine whether the thorax is smaller, which is less likely than an enlarged heart.
Does this patient have heart disease? Looking at the film, everyone can be sure that the evidence found by Duan is much more reliable than the boy's previous suspicion of tuberculosis.
After listening to Duan's words, the seniors in the crowd showed a rather approving attitude. Doctor Cheng Yuchen nodded and said, "You continue."
There are three suspicious points in Duan’s statement, and I will only talk about the first one.
The others were waiting for Duan to speak.
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