Clinical Value of Haemodynamic Changes in Patients with Severe Stenosis or Occlusion of Iternal Carotid Artery-extracranial Segments by TCD
Zhao Renjun
Liu Ying
Yang Jianhui
Abstract：Objective To analyze the haemodynamic changes and its clinical value in the patients with severe stenosis or occlusion of internal carotid artery-extracranial segment (ICA-ECS) by using TCD (transcranial Doppler ultrasound).Methods Fifty-two patients with severe stenosis or occlusion of ICA-ECS were evaluated by TCD as observation group,while 52 age-matched nomnal subjects were as control group.The peak systolic velocity (PSV) and pulsatile index (PI) of the bilateral middle cerebral artery (MCA),anterior cerebral artery (ACA),posterior cerebral artery (PCA) were detected and compared,and the type of collateral circulation opened were judged.Results The change of cranial internal carotid artery severe stenosis or with occlusive of patients with intracranial hemodynamic parameters was significant;compared with the health side,the other side MCA,ACA blood flow were decreased significantly and morphological spectrum showed diffuse blunt shape,PSV and PI decreased significantly (P<0.01);PCA blood flow was increased significantly,PSV and PI index changed had significant difference (P<0.05).The bilateral artery OA blood flow showed was moved towards the positive,spectrum morphology of peripheral vascular high impedance wave.TCD and DSA (digital subtraction angiography) detected basically consistent about the type and degree of collateral circulation,there was no significant statistical significance(P>0.05).Conclusion TCD can accurately detect the haemodynamic changes in the patients with severe stenosis or occlusion of ICA-ECS and can provide the important information for guiding the clinical treatment and identifying the prognosis.
Keywords：transcranial Doppler ultrasoundinternal carotid arterysevere stenosisocclusionhemodynamics
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：3( 1653-1655 )