An automatic system for capturing and processing ultrasonic Doppler signals and blood pressure signals.
A totally automatic system for capturing and processing ultrasonic Doppler signals and blood pressure signals at pre-programmed intervals is described. The Doppler signals are Fourier transformed and a composite maximum frequency envelope extracted from the spectral data. The frequency envelope is split into individual cardiac cycles and a number of Doppler parameters calculated. All Doppler and blood pressure results are stored on disc, and the most important may be displayed in the form of trend graphs on a computer screen. The system has been used to study variations in middle cerebral artery blood flow velocity and systemic blood pressure in neonates over periods of several hours.
Evans
D H
DH
Department of Medical Physics and Clinical Engineering, Leicester Royal Infirmary, UK.
Schlindwein
F S
FS
Levene
M I
MI
D001794:Blood Pressure; D003196:Computer Graphics; D006801:Humans; D007231:Infant, Newborn; D012815:Signal Processing, Computer-Assisted; D012984:Software; D014463:Ultrasonography