Phenylketonuria screening
Phenylketonuria screening Purpose To screen infants for phenylketonuria (PKU) Patient preparation Inform the parents that a small amount of blood will be drawn from the neonate’s heel. Tell the parents…
Percutaneous umbilical blood sampling
Percutaneous umbilical blood sampling Purpose To obtain fetal blood samples for fetal karyotyping To aid in identifying hemophilia, hemoglobinopathies, fetal infections, chromosomal abnormalities, fetal distress, and fetal drug levels To…
Oxytocin challenge test
Oxytocin challenge test Purpose To evaluate the respiratory function of the placenta and provide an indication of how the fetus will tolerate the stress of labor To provide further information…
Nonstress test
Nonstress test Purpose To screen for suspected fetal distress or placental insufficiency associated with the following maternal conditions: diabetes mellitus, hyperthyroidism, chronic or gestational hypertension, collagen disease, heart disease, chronic…
Maternal serum alpha-fetoprotein
Maternal serum alpha-fetoprotein Purpose To screen those patients needing amniocentesis or high-resolution ultrasonography during pregnancy As a screening test to determine the presence of a fetal neural tube defect (NTD)…
Human placental lactogen
Human placental lactogen Purpose To assess placental function and fetal well-being To aid diagnosis of hydatidiform mole and choriocarcinoma To aid diagnosis and monitor treatment of nontrophoblastic tumors that ectopically…
Human chorionic gonadotropin, urine
Human chorionic gonadotropin, urine Purpose To detect and confirm pregnancy To aid in the diagnosis of hydatidiform mole or human chorionic gonadotropin (hCG)–secreting tumors, threatened abortion, or dead fetus Patient…
Human chorionic gonadotropin, serum
Human chorionic gonadotropin, serum Purpose To detect early pregnancy To determine adequacy of hormonal production in high-risk pregnancies (for example, habitual abortion) To aid in the diagnosis of trophoblastic tumors,…
Glucose tolerance, oral
Glucose tolerance, oral Purpose To confirm diabetes mellitus in selected patients To aid in the diagnosis of hypoglycemia and malabsorption syndrome Patient preparation Explain to the patient that the oral…
Fibrin split products
Fibrin split products Purpose To detect fibrin split products (FSP) in the circulation To help determine the presence and severity of a hyperfibrinolytic state (such as disseminated intravascular coagulation [DIC])…
