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[13] [14] Blood typing would also detect maternal blood, as the I antigen only occurs in adults. [12] The Kleihauer–Betke test can detect very small amounts of maternal blood before the third trimester of pregnancy by monitoring hemoglobin elution in acid because adult and fetal hemoglobin elute differently in acid. [12]
The results of the blood test are then combined with the NT ultrasound measurements, maternal age, and gestational age of the fetus to yield a risk score for Down syndrome, trisomy 18, and trisomy 13. First Trimester Combined Test has a sensitivity (i.e. detection rate for abnormalities) of 82–87% and a false-positive rate of around 5%. [73] [74]
This is a shortened version of the fifteenth chapter of the ICD-9: Certain Conditions originating in the Perinatal Period. It covers ICD codes 760 to 779. The full chapter can be found on pages 439 to 453 of Volume 1, which contains all (sub)categories of the ICD-9. Volume 2 is an alphabetical index of Volume 1.
This is a shortened version of the eleventh chapter of the ICD-9: Complications of Pregnancy, Childbirth, and the Puerperium. It covers ICD codes 630 to 679 . The full chapter can be found on pages 355 to 378 of Volume 1, which contains all (sub)categories of the ICD-9.
Gestational thrombocytopenia will become evident during the mid-second trimester through the third trimester of pregnancy and it is diagnosed based on exclusion. [2] For example, women with a history of immune thrombocytopenia or thrombocytopenia, prior to pregnancy, will not be diagnosed with gestational thrombocytopenia. [2]
The ICD-10 Procedure Coding System (ICD-10-PCS) is a US system of medical classification used for procedural coding.The Centers for Medicare and Medicaid Services, the agency responsible for maintaining the inpatient procedure code set in the U.S., contracted with 3M Health Information Systems in 1995 to design and then develop a procedure classification system to replace Volume 3 of ICD-9-CM.
Cases of GTD can be diagnosed through routine tests given during pregnancy, such as blood tests and ultrasound, or through tests done after miscarriage or abortion. [15] Vaginal bleeding, enlarged uterus, pelvic pain or discomfort, and vomiting too much (hyperemesis) are the most common symptoms of GTD.
After the pregnancy ends it decreases rapidly, with a half-life of about 5 days. Typically, MSAFP is measured in the beginning of the second trimester (14–16 weeks). It may be measured alone or as part of a package of routine prenatal screening tests, such as a triple test or quad test.