serum carcinoembryonic antigen

Carcinoembryonic antigen is an acidic glycoprotein with human embryonic antigenic determinants. The embryonic stage is mainly in the organs of the gastrointestinal tract, liver and pancreas. It is a broad-spectrum tumor marker with low content after birth. The serum concentration is related to various tumors, especially digestive tract tumors. The positive rate of detection is colon cancer, rectal cancer, stomach cancer, pancreatic cancer, cholangiocarcinoma, etc. The malignant tumors of lung, breast and genitourinary system are also elevated. The detection of carcinoembryonic antigen is mainly used for differential diagnosis, disease monitoring, and efficacy judgment of tumors. Basic Information Specialist classification: Oncology examination classification: blood examination Applicable gender: whether men and women apply fasting: fasting Tips: Do not eat too greasy, high-protein foods the day before the blood draw, avoid heavy drinking, fasting for 12 hours before taking blood, take fresh blood for inspection. Normal value Normal should be <5μg/L. Clinical significance Abnormal result Elevation (positive): seen in the following cancers and their positive rates of colon cancer (74%), rectal cancer (73%), lung cancer (70%), breast cancer (60%), pancreatic cancer (90%). In addition, chronic colitis, colon polyps, rectal polyps, atrophic gastritis, cirrhosis, ulcerative colitis, biliary obstruction, cholecystitis, liver abscess, rheumatoid arthritis, chronic bronchitis, etc., serum carcinoembryonic antigen can also be light The degree is raised. Need to test for cirrhosis, stomach pain, arthritis, indigestion, abdominal cramps, etc. Positive results may be diseases: breast cancer, rectal cancer considerations Before inspection: 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. Fasting for 12 hours before taking blood, taking fresh blood for inspection. When checking: When you draw blood, you should relax your mind, avoid the contraction of blood vessels caused by fear, and increase the difficulty of blood collection. After inspection: 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. Inspection process The blood of the subject is drawn and detected by immunological methods. Not suitable for the crowd Unsuitable for people: those who do not have indications for examination should not be tested. Adverse reactions and risks 1. Infection: Pay attention to aseptic operation when collecting blood, avoid contamination of water and other parts at the blood collection site to avoid local infection. 2, bleeding: after the blood is given a full compression time, especially coagulopathy, bleeding tendency, to avoid local subcutaneous oozing, bruising and swelling.