Now that the medical level is becoming more and more developed, many people will run to the hospital whenever they have something, but most doctors will do a check, that is, they will draw blood from patients, and many people have some questions, why do they always draw blood? Where did all the blood go?
Blood contains various important chemical components such as red blood cells, white blood cells, and platelets, which are necessary to sustain life activities. Therefore, by testing the blood, doctors can gain valuable information about the patient's health.
Blood tests are a non-invasive test. Compared to other medical tests, such as X-rays or CT scans, blood draws are much less harmful to the patient's body.
Moreover, the accuracy and reliability of the blood test is also high because it can detect various biomarkers in the blood that can reflect the physiological state and disease status of the patient.
Blood tests can also provide doctors with dynamic information about a patient's condition. For example, by monitoring a patient's white blood cell count, doctors can find out if the patient's immune system is working properly. If the white blood cell count is abnormal, then this could mean that the patient has an infection or other disease.
1. Infectious diseases: Blood sampling can detect bacteria, viruses, parasites and other infectious pathogens, such as hepatitis, AIDS, syphilis, etc.
2. Metabolic diseases: Blood sampling can detect metabolic indicators such as blood glucose, blood lipids, and uric acid, and is used to diagnose diabetes, hyperlipidemia, gout and other diseases.
3. Immune diseases: Blood draws can detect the function and status of the immune system, such as rheumatoid arthritis, systemic lupus erythematosus and other autoimmune diseases.
4. Hematologic diseases: Blood sampling can detect various blood diseases, such as anemia, leukemia, thrombocytopenia, etc.
5. Other diseases: Blood draw can also detect some other diseases, such as hyperthyroidism, renal insufficiency, myocardial infarction, etc.
The accuracy and reliability of a blood test depends on a variety of factors, including blood collection techniques, sample handling, laboratory techniques, and equipment. Therefore, when conducting blood tests, you should choose a regular medical institution to ensure the accuracy and reliability of the test results.
In general, you only need to draw once to get the information you need. However, in some cases, the doctor may order multiple blood draws at different times of the day. There are several possible reasons behind this.
First, for certain diseases or physiological conditions, such as diabetes or renal insufficiency, doctors need to know how the patient's blood sugar or kidney function changes throughout the day. In this case, blood draws need to be taken at different points in the morning and afternoon to observe the fluctuations of these indicators.
Second, for cases that require drug concentration monitoring, your doctor may also order blood draws in the morning and afternoon. This is because the efficacy and concentration of the drug are closely related to its concentration in the body. By measuring drug concentrations at different time points, doctors can more accurately assess a patient's medication and adjust the dose or change the drug as needed.
In addition, morning and afternoon blood draws may involve special tests or experiments. For example, some tests need to be done on an empty stomach, while others need to be done after meals. By taking blood at different time periods, doctors can get a more complete picture of the patient's physiological state and disease status.
This involves some of the key indicators in the physical examination program, such as blood count, blood glucose and immunization, etc., which are measured in different ways. Among them, the more ways in which blood is tested, the greater the amount of blood naturally required.
However, in the actual testing process, there is sometimes a situation where an accurate result cannot be obtained, and then the blood needs to be drawn again for testing.
Therefore, when performing a medical examination, we should not only pay attention to the selection of test items, but also consider the amount of blood required and the circumstances that may require another blood draw.
Regarding the blood that is left after the test, it is usually stored for about a week. This is to give the test subject a buffer period and if they disagree with the test results, they can take the sample again for retesting.
Rumor has it that the hospital, after completing a blood test, uses only a portion of the blood sample and uses the remaining blood sample for other purposes. So, are these rumors true? How does the hospital process these blood samples?
In fact, hospitals usually keep a portion of the blood sample for emergency use after completing a blood test. This is to prevent the need to re-test certain indicators in subsequent diagnosis and treatment in order to better protect the patient's health. However, after a certain period of time, e.g. 7 to 15 days, these retained blood samples will be treated as clinical waste.
For these medical wastes, the hospital takes a series of strict measures to dispose of them safely. First, the hospital autoclaves or chemically treats these blood wastes to completely eliminate pathogens and infectious substances that may be present. After this treatment, the blood waste is no longer infectious, ensuring the safety of the environment.
Finally, the hospital will hand over the treated blood waste to a professional waste disposal company for centralized disposal. In this way, the hospital not only protects the health of patients, but also avoids environmental pollution.
Therefore, there is no need to worry about irregularities in blood tests. If you are unwell and need a blood test, you can rest assured that you can cooperate with the doctor's arrangement so that you can receive timely diagnosis and treatment and better protect your health.