Biomaterial Database

Serial echo-Doppler measurements of human fetal abdominal aortic blood flow. 1985

M W Eldridge, and W Berman, and E R Greene

An echo-Doppler duplex scanner (DS) was used to make serial noninvasive measurements of human fetal abdominal aortic blood flow (Q). In 18 uncomplicated pregnancies (16 weeks to term), Doppler shifted frequency spectral waveforms (delta f), Doppler incident angles (theta), and peak systolic lumen diameters (D) were measured. Using the measured values of delta f and theta, the temporal average blood velocity (V) in the cardiac cycle was calculated from the Doppler equation. Values of Q were calculated using the equation: Q = pi X (D2/2) X V X HR, where HR is the heart rate. Gestational age (GA) and fetal weight (FW) were estimated from biparietal and transverse abdominal diameters. Each fetus was studied three to eight times at 2- to 4-week intervals. Results showed that Q increased nonlinearly with GA. Normalized to estimated FW, values of Q/kg did not vary significantly with estimated GA and gave an overall mean value (+/- standard deviation) during gestation of 184 +/- 35 ml/kg/min.

UI	MeSH Term	Description	Entries
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
D001783	Blood Flow Velocity	A value equal to the total volume flow divided by the cross-sectional area of the vascular bed.	Blood Flow Velocities,Flow Velocities, Blood,Flow Velocity, Blood,Velocities, Blood Flow,Velocity, Blood Flow
D005260	Female		Females
D005323	Fetal Monitoring	Physiologic or biochemical monitoring of the fetus. It is usually done during LABOR, OBSTETRIC and may be performed in conjunction with the monitoring of uterine activity. It may also be performed prenatally as when the mother is undergoing surgery.	Monitoring, Fetal,Fetal Monitorings,Monitorings, Fetal
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000328	Adult	A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available.	Adults
D001012	Aorta, Abdominal	The aorta from the DIAPHRAGM to the bifurcation into the right and left common iliac arteries.	Abdominal Aorta,Abdominal Aortas,Aortas, Abdominal
D014463	Ultrasonography	The visualization of deep structures of the body by recording the reflections or echoes of ultrasonic pulses directed into the tissues. Use of ultrasound for imaging or diagnostic purposes employs frequencies ranging from 1.6 to 10 megahertz.	Echography,Echotomography,Echotomography, Computer,Sonography, Medical,Tomography, Ultrasonic,Ultrasonic Diagnosis,Ultrasonic Imaging,Ultrasonographic Imaging,Computer Echotomography,Diagnosis, Ultrasonic,Diagnostic Ultrasound,Ultrasonic Tomography,Ultrasound Imaging,Diagnoses, Ultrasonic,Diagnostic Ultrasounds,Imaging, Ultrasonic,Imaging, Ultrasonographic,Imaging, Ultrasound,Imagings, Ultrasonographic,Imagings, Ultrasound,Medical Sonography,Ultrasonic Diagnoses,Ultrasonographic Imagings,Ultrasound, Diagnostic,Ultrasounds, Diagnostic
D014465	Ultrasonics	A subfield of acoustics dealing in the radio frequency range higher than acoustic SOUND waves (approximately above 20 kilohertz). Ultrasonic radiation is used therapeutically (DIATHERMY and ULTRASONIC THERAPY) to generate HEAT and to selectively destroy tissues. It is also used in diagnostics, for example, ULTRASONOGRAPHY; ECHOENCEPHALOGRAPHY; and ECHOCARDIOGRAPHY, to visually display echoes received from irradiated tissues.	Ultrasonic