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    Home > Active Ingredient News > Endocrine System > To detect hormones, it is important to find the best time to draw blood!

    To detect hormones, it is important to find the best time to draw blood!

    • Last Update: 2021-05-09
    • Source: Internet
    • Author: User
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    *Only for medical professionals to read the reference article summarizing the best blood draw time for the three types of hormones! Although the hospital laboratory has published a "Clinical Project Testing Manual", which covers almost all the collection of clinical specimens, it is not exhaustive for some special projects.

    Clinicians still have some questions, such as "sex hormone testing"-when should I take it? When is growth hormone? Does the cortisol test have to draw blood at eight in the morning? Whether the blood sampling is standard or not directly affects whether the test results can truly reflect the patient's condition and interfere with clinical judgment and decision-making.

    Almost all hormones secreted by our human body have a relatively regular secretion phase, or periodic secretion, or pulse secretion, and they have their own curves.

    Sex hormones For female sex hormones, its curve is based on the regular ups and downs of the menstrual cycle, which repeats itself again and again.

    Therefore, looking at the report sheet, there is only one reference range for each item in male patients, but most items in female patients are divided into "follicular period", "ovulation period", "luteal period", "pregnancy period", "menopausal period", etc.
    .

    For the same project, the "secrets" that clinicians want to learn from this project are different, and the timing of blood collection is also different.

    1.
    When assessing the functional status of the ovaries, blood is collected for all items on the 2-5th day of the menstrual cycle (early follicle growth).
    This period is also the best time to evaluate the patient's basic hormone levels; 2.
    When judging whether ovulation is normal or When evaluating corpus luteum function, it is generally required to collect blood on the 21st day of the menstrual cycle (mid-luteal phase); 3.
    When menstruation is not coming for a long time and eager to know the results, blood can be collected on any day.
    This time period defaults to the pre-menstrual period time.

    There are many factors that can cause the pulse secretion of prolactin (PRL), including sleep, eating, breastfeeding, pregnancy, having sex, stress state-not eating low blood sugar at breakfast; catching the bus and panting; getting to the hospital to be registered and being cut in by strange patients; the elevator is suffering Can't wait, climbing the stairs sweating profusely-at this time, when I stretch my arms to draw blood, most of them are high.

    Therefore, PRL blood collection requires blood collection at 10 am and in a quiet state: generally the patient is required to sit still for more than half an hour, and a single low-amplitude increase is of little value.
    Generally, more than two comprehensive evaluations are required.

    In the second review, attention should be paid to avoid taking hormone drugs, high-fat and high-protein diet before blood collection, and avoid emotional stress, cold, anesthesia, surgery, hypoglycemia, sex, exercise, breast and chest wall stimulation, etc.

    Human Growth Hormone Human Growth Hormone (GH) is a protein secreted by cells of the adenohypophysis.

    Under normal circumstances, growth hormone is secreted in pulses, and its secretion is regulated by growth hormone releasing hormone (GHRH) produced by the hypothalamus and also affected by gender, age, and circadian rhythm.
    The secretion is significantly increased during sleep.

    Studies have shown that because GH is mainly secreted in pulses and has a half-life of only 20 minutes, it is not possible to make a relevant diagnosis based on the results of a certain GH measurement when it is uncertain whether the patient is in the pulse secretion period or the interval period of blood sampling.

    The GH test is generally suitable for people who are not suitable for the test.
    The blood can be drawn on an empty stomach during the test.
    It is recommended to take a rest the night before the test.
    The diet should be light, eat less spicy and greasy food, and drink plenty of water.

    Plasma cortisol Plasma cortisol is a glucocorticoid secreted by the fascicular zone of the adrenal cortex.
    The purpose of plasma cortisol determination is to determine whether the adrenal cortex is in a disorder.

    Normal human plasma cortisol secretion is regulated by adrenocorticotropic hormone (ACTH), which has a certain circadian rhythm, as shown in Figure 1.

    Generally, the secretion is the most at about 8 am, and then gradually decreases, and the secretion volume at about 4 pm is 50% or more than the highest value in the morning.

    The secretion is the least until midnight or around 1:00 in the morning, and the plasma content is the lowest, and the secretion begins to increase again at 4 in the morning.

    Therefore, it is ideal to draw venous blood at 8 am, 4 pm, and 12 midnight to determine the plasma free cortisol content.

    Source of this articleResponsible Editor of Laboratory Medicine NetworkXiao Ma Ma Past Review ☑ Six sex hormones, a barometer of reproductive endocrine health [Recommended collection] ☑ Are the "sex" hormones that patients resist really that terrible? |The secret of drug secretion ☑ The problem of sexual function may be rooted in the brain! What about the pituitary hormone pump? Copyright Statement This article is reproduced, welcome to forward it to Moments-End-Submission/Reprint/Business Cooperation, please contact: pengsanmei@yxj.
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