Biomaterial Database

Prediction of fetoplacental blood volume in isoimmunized pregnancy. 1988

S N MacGregor, and M L Socol, and B W Pielet, and J T Sholl, and J P Minogue

Department of Obstetrics and Gynecology, Northwestern University Medical School, Chicago, Illinois.

Direct intravascular fetal transfusion under ultrasound guidance allows precise evaluation of both fetal anemia and adequacy of therapy. In addition, the change in hematocrit after transfusion may be used to estimate the circulatory fetoplacental blood volume. In this study we present the estimates of fetoplacental blood volume calculated at the time of intravascular fetal transfusions. Between March 1986 and March 1988, 60 intravascular fetal transfusions were performed in 20 patients. The 56 procedures in which fetal hematocrits were obtained both before and after transfusion were analyzed. The mean fetoplacental blood volume before transfusion was 94.0 ml/kg. Furthermore, the fetoplacental blood volume per kilogram fetal weight decreased with advancing gestation. These estimates of fetoplacental blood volume and changes relative to gestational age may be useful in the treatment of the severely isoimmunized fetus. Reliance on the more recently generated fetoplacental blood volumes may allow more accurate predictions of transfusion volumes and estimation of the hematocrit after transfusion.

UI	MeSH Term	Description	Entries
D007518	Isoantibodies	Antibodies from an individual that react with ISOANTIGENS of another individual of the same species.	Alloantibodies
D010920	Placenta	A highly vascularized mammalian fetal-maternal organ and major site of transport of oxygen, nutrients, and fetal waste products. It includes a fetal portion (CHORIONIC VILLI) derived from TROPHOBLASTS and a maternal portion (DECIDUA) derived from the uterine ENDOMETRIUM. The placenta produces an array of steroid, protein and peptide hormones (PLACENTAL HORMONES).	Placentoma, Normal,Placentome,Placentas,Placentomes
D011247	Pregnancy	The status during which female mammals carry their developing young (EMBRYOS or FETUSES) in utero before birth, beginning from FERTILIZATION to BIRTH.	Gestation,Pregnancies
D011250	Pregnancy Complications, Hematologic	The co-occurrence of pregnancy and a blood disease (HEMATOLOGIC DISEASES) which involves BLOOD CELLS or COAGULATION FACTORS. The hematologic disease may precede or follow FERTILIZATION and it may or may not have a deleterious effect on the pregnant woman or FETUS.	Complications, Hematologic Pregnancy,Hematologic Pregnancy Complications,Pregnancy Complications, Hematological,Pregnancy, Hematologic Complications,Complication, Hematologic Pregnancy,Complication, Hematological Pregnancy,Complications, Hematological Pregnancy,Hematologic Pregnancy Complication,Hematological Pregnancy Complication,Hematological Pregnancy Complications,Pregnancies, Hematologic Complications,Pregnancy Complication, Hematologic,Pregnancy Complication, Hematological
D001805	Blood Transfusion, Intrauterine	In utero transfusion of BLOOD into the FETUS for the treatment of FETAL DISEASES, such as fetal erythroblastosis (ERYTHROBLASTOSIS, FETAL).	Fetal Transfusion,Intrauterine Transfusion,Blood Transfusions, Intrauterine,Fetal Transfusions,Intrauterine Blood Transfusion,Intrauterine Blood Transfusions,Intrauterine Transfusions,Transfusion, Fetal,Transfusion, Intrauterine,Transfusion, Intrauterine Blood,Transfusions, Fetal,Transfusions, Intrauterine,Transfusions, Intrauterine Blood
D001810	Blood Volume	Volume of circulating BLOOD. It is the sum of the PLASMA VOLUME and ERYTHROCYTE VOLUME.	Blood Volumes,Volume, Blood,Volumes, Blood
D001835	Body Weight	The mass or quantity of heaviness of an individual. It is expressed by units of pounds or kilograms.	Body Weights,Weight, Body,Weights, Body
D005260	Female		Females
D005333	Fetus	The unborn young of a viviparous mammal, in the postembryonic period, after the major structures have been outlined. In humans, the unborn young from the end of the eighth week after CONCEPTION until BIRTH, as distinguished from the earlier EMBRYO, MAMMALIAN.	Fetal Structures,Fetal Tissue,Fetuses,Mummified Fetus,Retained Fetus,Fetal Structure,Fetal Tissues,Fetus, Mummified,Fetus, Retained,Structure, Fetal,Structures, Fetal,Tissue, Fetal,Tissues, Fetal
D005865	Gestational Age	The age of the conceptus, beginning from the time of FERTILIZATION. In clinical obstetrics, the gestational age is often estimated from the onset of the last MENSTRUATION which is about 2 weeks before OVULATION and fertilization. It is also estimated to begin from fertilization, estrus, coitus, or artificial insemination.	Embryologic Age,Fetal Maturity, Chronologic,Chronologic Fetal Maturity,Fetal Age,Maturity, Chronologic Fetal,Age, Embryologic,Age, Fetal,Age, Gestational,Ages, Embryologic,Ages, Fetal,Ages, Gestational,Embryologic Ages,Fetal Ages,Gestational Ages