摘要
Abstract
Objective To discuss the value of transcranial Doppler ( TCD ) in the evaluation of cerebral blood flow in patients with vertebrobasilar artery stenosis before and after percutaneous transluminal angioplasty ( PTA ) . Methods 43 patients with vertebrobasilar artery stenosis diagnosed by digital subtraction angiography ( DSA ) were given TCD ultrasonography before and after PTA treatment. Blood flow indicators ( Vs, Vd, PI and RI ) were collected and compared with vascular morphology results of DSA. Results Before PTA, TCD examination showed that the blood flow velocity in artery with stenosis was increased with spectrum disorders, the frequency window was filled and eddy current signal could be seen, meanwhile, the RI and PI were increased and coarse vascular murmur or gull sound could be heard; blood flow signal was not detected in the initial part in one case. The abnormality rate according to TCD was 97. 6% , among which 6 cases had abnormal blood flow velocity in basilar artery, 28 cases in unilateral vertebral artery, 8 cases in bilateral vertebral artery and one case had normal velocity. After PTA, the spectrum was normal with clear frequency window, and the blood audio signal was also normal; one case had little change. The blood flow indicators according to TCD showed statistically significant differences before and after PTA ( P < 0. 05 ) . All the indicators had decreased to reference range. The consistent rate between TCD and DSA before PTA was 97. 6%. No patient had recurrence of stenosis during the six - month following up. Conclusion TCD can provide objective evidence for evaluation of the effects before and after PTA in the treatment of vertebrobasilar artery stenosis and for the follow - up visit after PTA. Combined with the results of DSA, corresponding changes after the improvement of cerebral ischemia can be clearly known.关键词
椎基底动脉狭窄/血管成形术,气囊/超声检查/多普勒,经颅/血管造影术,数字减影Key words
Vertebrobasilar artery stenosis/ Angioplasty, balloon/ Ultrasonography, Doppler, transcranial/ Angiography, digital subtraction分类
医药卫生
