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¡¾1634¡¿Technical comparison

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    "It's for ivus." Shen Youhuan smashed his fist on his palm, and finally remembered that there was such a specialized examination, and said, "I thought she was going to do an esophageal ultrasound, but I thought that this thing wasn't done. Could it be done during the operation?  Do?"

    Ivus is intravascular ultrasound, which can also examine the intravascular conditions of coronary arteries.  The difference from coronary angiography is that it does not require the use of contrast agent for fluoroscopy to reveal the thickness of blood vessels. Instead, a miniature ultrasound probe is directly sent into the blood vessels to detect the internal conditions of the blood vessels.  Further examinations include future OCT, which uses infrared rays to measure blood vessels, which is more accurate than IVUS.

    Why are the latter two techniques not commonly used clinically?  There is only one main reason, it is expensive.

    Relatively cheap coronary angiography can already achieve very good results, why should these two technologies be used?  Besides, after detection by these two technologies, stent placement still requires the use of imaging technology.  This means that the cost has doubled, but the efficacy is not much different.  Doctors know which one to choose for the sake of ordinary people.

    These two techniques are not used clinically.  As long as any technological invention can survive, it must have its irreplaceable usability.

    Like oct, ivus is much more accurate than coronary angiography.

    This high accuracy can be used in many difficult cases.

    For example, a patient with typical clinical symptoms undergoes coronary angiography and finds that the stenosis of the blood vessel is not enough to meet the requirements for stent placement, which is at the limit.  Legally, if a doctor puts a stent on a patient, it is excessive medical treatment and produces other sequelae, and he will be sued.  Failure to relieve the patient's symptoms also brings other high risks.  Doctors can only seek other evidence. At this time, IVUS may play a key role. IVUS can play a role in stenosis that cannot be seen on coronary angiography.

    The reason is that the results of coronary angiography are only the lumen size of the coronary arteries, and the inability to detect the blood vessel wall leads to an underestimation of the severity of vascular stenosis.

    For example, most patients with coronary heart disease have stenoses caused by atherosclerotic plaques. Only ivus can detect early sclerotic plaques on the blood vessel wall and tell doctors the severity of the disease, which can prompt the need for stent placement one step earlier than coronary angiography.

    ?The same principle.  For some young patients, the symptoms of coronary heart disease on angiography indicate severe stenosis. Doctors know that they may not have the age basis for atherosclerosis. At this time, if they do not put a stent on the patient, it is considered medical negligence and they may be sued for negligence.  Using ivus to measure the condition of blood vessel walls can help doctors find more concrete evidence to make judgments.  When the blood vessel wall lesions are not serious, it is not too late to remove the thrombus first, and then decide whether to place a stent after a certain period of time. It is possible not to over-treat, and it is best not to over-treat.

    ¡°In the case of patient Xiao Shugang, coronary angiography may not be able to detect stenosis, or it may not be necessary to insert a stent to see which segment is stenotic.  What needs to be checked more is the condition of the blood vessel walls to see if there are any traces of damage after the car accident.

    "The problem I gave him for this examination can only be seen from the inside and not from the outside." Shen Youhuan conducted academic exchanges through his spokespersons, classmates Pan and Xie.

    "Yingying said that the inside and outside are connected, and we can determine the area where the surgical operation is to be performed." Pan Shihua said.

    "Does she mean to solve the problem of the patient's limited surgical area first?" Shen Youhuan asked.

    "She means that the blood supply area of ??the heart must be solved first." Pan Shihua said.

    Purple Pen Literature (remember the website address: www.hlnovel.com
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