chorionic gonadotropin beta (HCG-beta)

HCG is a glycoprotein hormone secreted by placental syncytiotrophoblast cells. Its main function is to maintain the corpus luteum and reduce the activity of maternal lymphocytes to prevent rejection of the fetus. The HCG structure includes two subunits α and β. The α subunit is similar to LH, FSH and TSH, especially the LH has a large immune cross reaction. The β chain is unique, and the β subunit is used to prepare specific. Sex antibodies measure HCG in the blood and are known as β-HCG. There are many methods for detecting HCG, such as chemiluminescence, radioimmunoassay (RIA) and immunogold standard test paper. Basic Information Specialist classification: maternity check check classification: endocrine examination Applicable gender: whether women are fasting: fasting Tips: Do not eat too greasy, high-protein foods the day before the blood draw, avoid heavy drinking. The alcohol content in the blood directly affects the test results. Normal value Radioimmunoassay: 7 to 10 days of pregnancy > 5.0 mIU / ml. 30 days > 100 mIU/ml. 40 days > 2000 mIU/ml. 10 weeks > 50 ~ 100mIU / ml. 16 weeks > 10 ~ 50 mIU / ml. Clinical significance Increase early pregnancy, ectopic pregnancy, choriocarcinoma, hydatidiform mole, malignant mole. High results may be diseases: early pregnancy, ectopic pregnancy, early pregnancy reaction precautions First, the precautions before blood draw 1, do not eat too greasy, high-protein food the day before the blood, to avoid heavy drinking. The alcohol content in the blood directly affects the test results. 2. After 8 pm on the day before the medical examination, you should start fasting for 12 hours to avoid affecting the test results. 3, should relax when taking blood, to avoid the contraction of blood vessels caused by fear, increase the difficulty of blood collection. Second, should pay attention after blood draw 1. After blood is drawn, local compression is required at the pinhole for 3-5 minutes to stop bleeding. Note: Do not rub, so as not to cause subcutaneous hematoma. 2, the pressing time should be sufficient. There is a difference in clotting time for each person, and some people need a little longer to clotting. Therefore, when the surface of the skin appears to be bleeding, the compression is stopped immediately, and the blood may be infiltrated into the skin due to incomplete hemostasis. Therefore, the compression time is longer to completely stop bleeding. If there is a tendency to bleed, the compression time should be extended. 3, after the blood draw symptoms of fainting such as: dizziness, vertigo, fatigue, etc. should immediately lie down, drink a small amount of syrup, and then undergo a physical examination after the symptoms are relieved. 4. If there is localized congestion, use a warm towel after 24 hours to promote absorption. 3. Please inform the doctor about the recent medication and special physiological changes before the test. Inspection process Hormone determination. Not suitable for the crowd no. Adverse reactions and risks no.