The Collateral Circulation Assess Of Symptomatic Unilateral Internal Carotid Artery Occlusive Disease

PurposeTCD and DSA collateral circulation assessment in patients with unilateral internalcarotid artery occlusive disease, Comparison of intracranial collateral pathways open, andblood flow velocity, PI value, comparative analysis, further evaluation of unilateral internalcarotid system occlusivecompensatory capacity of collateral circulation in patients withlesions.MethodSelect the PLA Second Artillery General Hospital Department of Neurology,hospitalized with symptomatic severe carotid artery stenosis or occlusion, application ofthe PHILIPS FD20DSA digital subtraction machine total cerebral angiography andcollateral circulation assessment, while Germany EMETC a2000S TCD instrument,routine testing of bilateral common carotid artery carotid artery, the intracranial circle ofWillis and major arteries branch, the assessment of collateral circulation. Line CTA, and64th by Germany’s Siemens spiral CT scanner as imaging proved to help determine thepresence of internal carotid artery severe stenosis or occlusion. Both DSA and TCD manycomparative calculation results of the assessment, to assess the collateral circulationcompensatory ability of carotid artery occlusive disease. Statistical methods of dataprocessing applications SPSS13.0statistical software to process data. X±S, themeasurement data between the two groups were compared using t-test among the threegroups using analysis of variance. Count the relative number between the two groups werecompared using chi-square test. P≤0.05for the differences statistically significant.Result41cases of patients with a single focus on the degree of carotid stenosis24cases, unilateral carotid artery occlusion l7patients had severe carotid artery stenosis in2cases.TCD measurements to get AcoA open five cases, accounting for12.20%, PcoA open thosefive cases, accounting for12.20%, OA open those25cases, accounting for7.32%, nocollateral circulation pathways open16patients, accounting for39.02%.TCD and DSA inthe assessment of the number of collateral vessels open, no statistically significantdifference. TCD and DSA in the assessment of the number of collateral vessels open, nostatistically significant difference. TCD assessment of ophthalmic artery open in theinternal carotid artery severe stenosis or occlusion or significant differences.(P <0.05).Internal carotid artery severe stenosis or occlusion in patients with TCD and DSAcollateral circulation to assess not statistically significant.(P>0.05). Narrow group ofMCA PI values lower than the occlusion group, the maximum flow rate of the narrowgroup of OA below the occlusion group (P <0.05). Carotid artery stenosis in patients withOA opening number is greater than in patients with occlusion group (P>0.05).Conclusion1.TCD is basically consistent with the role of DSA in the assessment of the number ofcollateral vessels open; ophthalmic artery is involved in the collateral circulation and theophthalmic artery of the open process of vascular lesions affect. Ophthalmic artery has acertain correlation between the extent and severity of the disease as secondary collateralpathway is involved in collateral circulation in patients with chronic occlusive carotidartery, ophthalmic artery alone open ratio greater than moderate to severe stenosis patients;ophthalmic artery patients with basilar artery PI was higher than that of a collateralcirculation in patients with a separate open and a collateral circulation is not open.