"Why did you draw blood again, isn't it just a small cold, and I was given such a lot of lists, is this hospital still treating diseases or earning examination fees!" Looking at the checklist in his hand, Uncle Chen couldn't help but complain.
It turned out that the temperature had plummeted in the past few days, and there were various infections everywhere outside, Uncle Chen was already in poor health, and now he couldn't bear it, and he didn't get better after catching a cold for many days.
Uncle Chen originally wanted to go to the hospital to prescribe some medicine to eat, but who knew that after the doctor asked about his symptoms, not only did he not prescribe medicine immediately, but prescribed a bunch of checklists for him, asking him to check it first and then prescribe medicine according to the situation, which is what happened at the beginning.
In fact, many people have similar experiences in real life, and it is very common for doctors to prescribe various tests as soon as they enter the hospital, especially blood drawing. Many people have doubts about this: why do you have to draw blood every time? What is the use of blood drawing? What should you do if the blood is not used up? Should it be sold?
Why do I have to draw blood as soon as I enter the hospital?
Blood drawing is actually a more colloquial term, and strictly speaking, "blood drawing" should be called "blood test".
Medicine, especially Western medicine, dialectically advocates evidence, so it needs an objective and scientific basis for evidence, and then doctors give corresponding treatment methods according to their own clinical experience and the patient's own specific situation.
It is difficult for a doctor to make a specific diagnosis if he or she only conducts an initial consultation, and many diseases have similar symptoms, so it is difficult to make a diagnosis.
Blood circulates in our body, flows through various important organs of the body, penetrates into various tissues, and it is like a "monitor" that can travel around. Therefore, this is the main reason why blood test indicators can be used to judge the lesions of various tissues and organs of the body.
Compared with B-ultrasound, CT, MRI, etc., blood sampling is often more convenient and affordable, so blood tests are more widely used in clinical practice.
What diseases can be detected by a blood draw?
(1) Metabolic diseases
The most common blood test is the blood routine test, which mainly contains some basic indicators of blood, such as blood lipids, blood sugar, etc., through which the patient can be judged whether there are metabolic diseases such as hyperlipidemia and hyperglycemia.
(2) Endocrine diseases
By checking the amount of thyroid hormone and adrenal hormone in the blood, it is possible to determine whether the patient has endocrine diseases such as hyperthyroidism and hypothyroidism.
(3) Infectious diseases
Normally, there are no bacteria in the blood, but when the body is infected, the bacteria will multiply in the blood, and the patient will have symptoms such as persistent high fever and chills, and the disease-causing microorganisms can be cultured by taking blood for culture. In addition, many infectious diseases can also be detected through blood tests, such as hepatitis B, hepatitis C, HIV and syphilis.
(4) Hematologic diseases
Many hematologic disorders can also be detected by blood tests, such as abnormally high white blood cells, which are common in leukemia, myeloproliferative disorders, and malignant tumors, and low red blood cells and hemoglobin, which often indicate various pathological anemias.
(5) Organ function
Through the condition of the blood, we can also judge the health of our organs. For example, the amount of aminotransferases and bilirubin in the blood can determine whether there is a hidden liver disease, cardiac enzymes can determine whether there is a myocardial infarction, and amylase and lipase can check whether the pancreas is normal.
In addition, with the development of modern medicine, blood tests can also be used to screen tumor markers and carcinoembryonic antigens, which play a non-negligible role in the prevention and treatment of cancer.
Why did I have to draw blood in the morning and have to draw it again in the afternoon?
Some people may have experienced this situation where they have had their blood drawn in the morning and then they have it drawn in the afternoon, but why is that? Actually, the reason is very simple, because there are some items that need to detect fluctuations in a certain period of time.
For example, the myocardial enzymes mentioned above can determine whether there is a myocardial infarction. This is because sometimes a diagnosis of myocardial infarction is confirmed, or a high suspicion of myocardial infarction is high, and the cardiac enzymes may be normal in the morning blood draw, but the myocardial infarction cannot be ruled out, and the blood must be drawn again in the afternoon to verify. The reason is also very simple, this is because the myocardial enzymes may change over time, especially within 24 hours of myocardial infarction, the myocardial enzymes will change significantly, so it is necessary to draw blood multiple times to verify.
Another example is our common blood sugar check, not only to draw blood on an empty stomach during three meals, but also to draw blood after three meals.
Therefore, when we encounter a situation where blood has been drawn in the morning and blood is drawn again in the afternoon, do not panic too much, this may happen in the project that is greatly affected by the condition within 24 hours.
Where does the blood end up going?
This is the most concerned issue, because of the mystery, so over the years there have been many versions of this issue, some of which are even outrageous, for example, some people say that doctors will classify the remaining blood according to blood type, and then store it, and then sell it to other patients;
First of all, it is certain that none of the above statements are true, and it is simply impossible to sell to other patients. Because according to the provisions of the "Blood Donation Law", the blood used in the hospital must be collected and used by the local blood station.
If the blood is given to the patient without being monitored by the blood bank, there may be various hidden dangers, such as hepatitis B virus and HIV.
In fact, the blood drawn generally goes through the following procedures.
First of all, depending on the examination item, the blood will be collected into the corresponding blood collection tube, sent to a centrifuge, and centrifuged.
Then it is sent to the laboratory department and put into the corresponding machine for testing. After the test is completed, these blood samples are usually stored temporarily to facilitate later retesting, but they are generally not stored for a long time, usually 1-15 days.
After the expiration of the preservation, it will be collected into the medical waste bag by a special person for packaging and processing, and finally harmless treatment or destruction by the enterprise specializing in the treatment of medical waste.
Therefore, you don't need to worry too much, because the school itself is a potential "source of pollution", and many infectious diseases can be transmitted through blood, so the hospital has very strict requirements for this area. In addition, blood can reflect many health problems, so try to cooperate with your doctor when recommending relevant tests.