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 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 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 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])…
Fibrinogen Purpose To help diagnose suspected clotting or bleeding disorders caused by fibrinogen abnormalities Usually drawn when the patient has pre-eclampsia and may be developing disseminated intravascular coagulation (DIC) Patient…
Fetal-maternal erythrocyte distribution Purpose To detect and measure fetal-maternal blood transfer To determine the amount of Rho(D) immune globulin needed to prevent maternal immunization to the D antigen Also called…
Coombs’ test, direct Purpose To detect antigen-antibody complexes on the red blood cell membrane in vivo as well as red blood cell sensitization in Rh-positive neonates whose mothers are Rh…
Chorionic villi sampling Purpose To analyze for fetal chromosomal and biochemical abnormalities, such as Tay-Sachs disease, sickle cell disease, anemia, cystic fibrosis, and Down syndrome Patient preparation Explain to the…
Biophysical profile Purpose To assess fetal well-being in the later stages of pregnancy To detect central nervous system depression in the fetus Patient preparation Explain the procedure and its purpose…
Bilirubin, total Purpose To evaluate the neonate’s liver function To differentiate physiologic from pathologic hyperbilirubinemia To aid in the differential diagnosis of jaundice and monitor its progress To determine whether…
