Dynamic Changes of Willis Circle by Manual Compression of the Proximal Common Carotid Artery During CT Angiography
LIU Cai-yun
MIAO Xin-zhong
MENG Chong
Abstract：Objective To investigate whether the dysplasia of Willis circle is variable by manual compression of the proximal common carotidartery(CCA)duringCTangiography(CTA).Methods 100healthyvolunteers(52male,48female)withoutcarotidarteryste-nosis were investigated.CTA was performed during the resting and oppression carotid artery.Variables including the integrity type of circle of Willis, blocked and open segment vascular redistribution of anterior and posterior circulation were analyzed by 2 test.The differences of the diameter including ACoA and carotid ipsilateral vessel (ACA-A1, PCA-P1, PCOA, ACoA) were analyzed by t tests.Results The differences of two states in the integrity type of circle of Willis , blocked and open segment vascular redistribution of anterior and posterior circulation were statistically significant (χ2 =17.007 , 88.658 , 23.990 , P=0.000 , 0.000 , 0.000<0.050 ).There was significant differ-ence in the diameter of the ACoA and ACA -Al, but there was no statistically significant difference between diameter of the PCOA and PCA-P1.Conclusion Manual compression of the proximal common carotid artery ( CCA) can lead to the circle of Willis morphological chan-ges, multi-slice spiral CT angiography ( CTA) combined with the test can be used to display individual primary collateral circulation and cerebral vascular reserve function , and timely detected sub -health population.
Keywords：Willis CircleCarotid arteryTomographyX-ray computerAngiography
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 1118-1121 )