周围型肺肿块周边血流的彩超研究

Study in the peripheral blood flow of peripheral pulmonary tumors with colour Doppler sonography

目的利用彩色多普勒血流显像（CDFI）和脉冲波多普勒技术（PW），对周围型肺肿块周边血流进行研究，以鉴别肿块的良恶性。方法对51例周围型肺肿块（良性18例，恶性33例）周边血流进行CDFI和PW检查。结果良恶性肺肿块周边血流的显示率分别为33%和88％，两者间有显著差异。恶性肿瘤血流程度多Ⅱ-Ⅲ级，而良性肿瘤多为0－Ⅰ级，两者间有显著差异。恶性肿瘤RI0．470．06，PI1．180．16，PSV0．170．04m／s，EDV0．070．02m／s：良性肿瘤RI0．810．12，PI1.680.33，PSV0.290.05m/s，EDV0.040.01m/s，两者在血流4项指标间有显著性差异。并以RI＜0．59，PSV＜0．25m／s，作为诊断肺恶性肿瘤的标准。结论CDFI和PW能显示肿块周边血流的血管分布和血流频谱，有助于鉴别其良恶性。

Objective To differentiate malignant from benign peripheral pulmonary masses by means of observing blood flow signals in the periphery blood, with colour Doppler flow imaging (CDFI)and pulsed-wave Doppler (PW). Methods Peripheral blood flow signals in 51 cases of peripheral pulmonary masses (18 benign, 33 malignant) were evaluated with CDFI and PW. Results The flow signal detection rates for malignant and benign pulmonary tumors in the peripheral blood flow were 88% and 33% respectively, and there were singificant differences between the two. Degree of periphery blood flow in malignant pulmonary masses was Ⅱ ~Ⅲ,but that in benign masses was 0~ I,and there were significan differences between the two. For benign tumors,RI was 0.47 0.06,PI was 1.18 0.16,PSV was 0.17 0.04m/s,and EDV was 0.07 0.02m/s.For malignant tumors,RI was 0.81 0.12,PSV was 0.29 0.05m/s,and EDV was 0.04 0.01m/s. All four variables were significanly different between the malignant and benign tumors. And RI <0.59, PSV < 0. 25 m/ s was used as the standard for the diagnosis of the malignant pulmonary tumors. Conclusions CDFI and PW are useful in showing vascularity and spectral wave of the peripheral blood flow, and in differentiating malignant from benign lung tumors.