title: An automatic system for capturing and processing ultrasonic Doppler signals and blood pressure signals.
abstract: 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.
authors.affiliation: Department of Medical Physics and Clinical Engineering, Leicester Royal Infirmary, UK.
authors.forename: D H
authors.initials: DH
authors.lastname: Evans
authors.forename: F S
authors.initials: FS
authors.lastname: Schlindwein
authors.forename: M I
authors.initials: MI
authors.lastname: Levene
mesh_terms: D001794:Blood Pressure; D003196:Computer Graphics; D006801:Humans; D007231:Infant, Newborn; D012815:Signal Processing, Computer-Assisted; D012984:Software; D014463:Ultrasonography