[Changes in the ultrasound power spectrum due to concentric stenoses of the femoral artery of the dog].
An artificial stenosis model consisting of a revolving centric cylinder with six boreholes (10-60% diameter reduction) was implanted in the superficial femoral artery of anaesthezised beagles (n = 10). Range gated pulsed Doppler signals were recorded at 7 sites between three diameters upstream to ten diameters downstream the Angle corrected parameters derived from the contour of spectral lines between 3 and 21dB on both sides of mode frequency were calculated for different time windows. Two groups of dogs could be distinguished. Group A showed marked downstream power spectrum changes which did not correlate to the degree of stenosis. In Group B, in contrast, the degree of power spectral disturbances correlated to the degree of stenosis. It was suggested that partial thrombosis of the stenoses during measurement provides an acceptable explanation for the missing correlation in Group A.
Pischel
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Klinische Forschung, Hoechst AG, Werk Kalle-Albert, Wiesbaden, BRD.
Labs
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KH
Völker
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R
Windeck
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P
Jäger
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K
D000818:Animals; D001157:Arterial Occlusive Diseases / Q000145:classification / Q000000981:diagnostic imaging*; D001783:Blood Flow Velocity / Q000502:physiology; D004285:Dogs; D005263:Femoral Artery / Q000000981:diagnostic imaging; D008955:Models, Cardiovascular; D009131:Muscle, Smooth, Vascular / Q000000981:diagnostic imaging*; D013927:Thrombosis / Q000145:classification / Q000000981:diagnostic imaging; D014463:Ultrasonography / Q000379:methods*
Veränderungen des Ultraschall Power-Spektrums durch konzentrische Stenosen in der Femoralarterie des Hundes.